1. High bright melamine gummed paper, its characterized in that: the method comprises the steps of gluing from top to bottom, printing paper subjected to modified urea glue dipping treatment and gluing from bottom to top.

2. The high gloss melamine impregnated paper according to claim 1, characterized in that: the upper gluing comprises the following raw materials: the melamine glue comprises melamine glue, a release agent, a dedusting agent and a curing agent, wherein 3000ml of the release agent, 900ml of the dedusting agent and 2300ml of the curing agent are added into every 1000 kg of the melamine glue, and the melamine glue comprises the following raw materials: by weight, 2500-2800 kg of formaldehyde, 4000-4500 kg of melamine, 150-180 kg of high-definition assistant and 900-1000 kg of water.

3. The high gloss melamine impregnated paper according to claim 1, characterized in that: the modified urea glue comprises the following raw materials: the urea glue comprises 1500ml of penetrant and 1050ml of curing agent per 450 kg of urea glue, and the urea glue comprises the following raw materials: by weight, the formaldehyde 7400-7800 kg, the urea 3500-4000 kg and the water 600-800 kg.

4. The high gloss melamine impregnated paper according to claim 1, characterized in that: the lower gluing comprises the following raw materials: the melamine glue comprises melamine glue, a release agent, a dedusting agent and a curing agent, wherein 800ml of the release agent, 600ml of the dedusting agent and 900ml of the curing agent are added into every 450 kg of the melamine glue, and the melamine glue comprises the following raw materials: by weight, the formaldehyde content is 2500-3000 kg, the melamine content is 4000-4500 kg, the high-definition additive content is 150-200 kg and the water content is 900-1000 kg.

5. The high gloss melamine impregnated paper according to claim 1, characterized in that: the upper glue coating further comprises an antistatic agent, a sound-absorbing noise-removing agent and a composite coupling agent, the lower glue coating further comprises an abrasion-resistant agent, the antistatic agent is one or more of graphite powder, molybdenum disulfide quantum dots and conductive mica powder, the addition amount of the antistatic agent is 3-20 wt% of the upper glue coating, the sound-absorbing noise-removing agent is one or more of wheat straw carbon fibers and apple carbon fibers, the addition amount of the sound-absorbing noise-removing agent is 10-25 wt% of the upper glue coating, and the composite coupling agent is an aluminate coupling agent and a silane coupling agent in a mass ratio of 1-2:1, and the wear-resisting agent is prepared by mixing molybdenum disulfide and aluminum hydroxide in a mass ratio of 1-3: 1 is obtained by compounding.

6. The production and processing technology of the high-brightness melamine impregnated paper is characterized by comprising the following steps: preparing the upper coating glue, the modified urea glue and the lower coating glue, dipping the printing paper in the modified urea glue, drying the printing paper by a dryer, coating the surface of the printing paper dipped by the modified urea glue by a rubber roller of a coating machine, coating the upper coating glue on the upper surface of the dipped paper by the upper rubber roller, coating the lower coating glue on the lower surface of the dipped paper by the lower rubber roller, drying the paper for the second time after coating, and rolling the upper coating glue on the coated paper by a rolling wheel to obtain the high-brightness melamine impregnated paper.

7. The process for producing high-gloss melamine impregnated paper according to claim 6, wherein: the method specifically comprises the following steps:

s1: preparing melamine glue in a reaction kettle: adding melamine, a high-definition assistant, water and formaldehyde into a reaction kettle, adding the formaldehyde three times, adjusting the pH value to 9.4, heating to 90-92 ℃, reacting for 50 minutes, naturally heating, keeping the temperature at 93-94 ℃ for 40-45 minutes, observing the mature condition of glue, and naturally cooling to below 40 ℃ to obtain melamine glue;

s2: preparing urea glue in a reaction kettle: adding formaldehyde and urea into a reaction kettle, adding triethanolamine, adjusting the pH value to 8.0, heating for 45 minutes, naturally heating, keeping the temperature at 92 ℃ for 1 hour, adjusting the pH value to 4.5, keeping the temperature at 95.5-97.5 ℃, measuring the fog point by using ice water, gradually increasing the water temperature, observing the maturity of the glue, adding the triethanolamine when the fog point reacts to 35 ℃, then cooling, adding urea for a second time when the temperature is reduced to 40 ℃, measuring the pH value, and cooling to below 40 ℃ to obtain urea glue;

s3: preparing modified urea glue: adding a penetrant and a curing agent into the urea gel in the S2, and uniformly mixing;

s4: preparing and gluing: adding a release agent, a dedusting agent and a curing agent into the melamine glue in the S1, and uniformly mixing;

s5: preparing and gluing: adding a release agent, a dedusting agent and a curing agent into the melamine glue in the S1, and uniformly mixing;

s6: dipping treatment: dipping the printing paper in the modified urea adhesive prepared in S3;

s7: and (3) drying treatment: drying the printing paper after the modified urea adhesive dipping treatment by a dryer;

s8: coating treatment: coating the surface of the printing paper after the modified urea glue is soaked by a rubber roller of a coating machine, coating the upper surface of the paper with an upper rubber roller, and coating the lower surface of the paper with a lower rubber roller;

s9: secondarily drying the coated printing paper through a dryer;

s10: sticking and pressing: and (3) rolling the coated paper by using a rolling wheel to coat the glue on the paper to obtain the high-brightness melamine impregnated paper.

8. The process for producing high-gloss melamine impregnated paper according to claim 7, wherein: the method specifically comprises the following steps:

s1: preparing melamine glue in a reaction kettle: adding melamine, a high-definition assistant, water and formaldehyde into a reaction kettle, adding the formaldehyde three times, adjusting the pH value to 9.4, heating to 90-92 ℃, reacting for 50 minutes, naturally heating, keeping the temperature at 93-94 ℃ for 40-45 minutes, observing the mature condition of glue, and naturally cooling to below 40 ℃ to obtain melamine glue;

s2: preparing urea glue in a reaction kettle: adding formaldehyde and urea into a reaction kettle, adding triethanolamine, adjusting the pH value to 8.0, heating for 45 minutes, naturally heating, keeping the temperature at 92 ℃ for 1 hour, adjusting the pH value to 4.5, keeping the temperature at 95.5-97.5 ℃, measuring the fog point by using ice water, gradually increasing the water temperature, observing the maturity of glue, reacting the fog point to 35 ℃, adding the triethanolamine, cooling, adding urea for the second time when the temperature is reduced to 40 ℃, measuring the pH value, and cooling to below 40 ℃ to obtain urea glue;

s3: preparing modified urea glue: adding a penetrant and a curing agent into the urea gel in the S2, and uniformly mixing;

s4: preparing and gluing: adding a release agent, a dedusting agent, a curing agent, an antistatic agent, a sound-absorbing noise-removing agent and a composite coupling agent into the melamine glue in S1, uniformly mixing, and performing ultrasonic treatment;

s5: preparing and gluing: adding a release agent, a dedusting agent, a curing agent and an abrasion-resistant agent into the melamine glue in S1, and uniformly mixing;

s6: dipping treatment: dipping the printing paper in the modified urea adhesive prepared in S3;

s7: and (3) drying treatment: drying the printing paper after the modified urea adhesive dipping treatment by a dryer;

s8: coating treatment: coating the surface of the printing paper after the modified urea glue is soaked by a rubber roller of a coating machine, coating the upper surface of the paper with an upper rubber roller, and coating the lower surface of the paper with a lower rubber roller;

s9: secondarily drying the coated printing paper through a dryer;

s10: sticking and pressing: and (3) rolling the coated paper by using a rolling wheel to coat the glue on the paper to obtain the high-brightness melamine impregnated paper.

9. The high gloss melamine impregnated paper according to claim 6, wherein: when the sound-absorbing noise-removing agent is wheat straw carbon fiber and apple carbon fiber in a mass ratio of 2:1, the preparation method comprises the following steps: crushing wheat straws and apple peels, adding the crushed wheat straws and apple peels into 4-10 wt% of aqueous alkali according to the weight ratio of 50-70 g of raw materials added into each 100mL of aqueous alkali, stirring the mixture for 3h at 85 ℃, taking the mixture out, washing the mixture to be neutral, drying the mixture, preparing 2-8 wt% of sodium hypochlorite solution, adjusting the pH value to be 4, stirring the dried sample in the sodium hypochlorite solution for 6h at 60 ℃, bleaching the mixture, cleaning the mixture to be neutral, drying the mixture for 10h at 80 ℃ to obtain wheat straw cellulose and apple cellulose, placing the wheat straw cellulose and the apple cellulose in a tube furnace, heating the mixture to 300-650 ℃ at the heating rate of 6-15 ℃/min, calcining the mixture for 2-4 h under the protection of nitrogen, naturally cooling the mixture to obtain wheat straw carbon fiber and apple carbon fiber, and crushing the wheat straw carbon fiber and the apple carbon fiber according to the mass ratio of 2:1, compounding to obtain the sound-absorbing noise-removing agent.

10. Use of the high gloss melamine impregnated paper according to any one of claims 1-9 in the preparation of a high gloss melamine board, characterized in that: and carrying out hot pressing on the high-gloss melamine impregnated paper and a base material to obtain the high-gloss melamine board, wherein the base material is a PVC board, the hot pressing temperature is 135-195 ℃, the hot pressing pressure is 14-22MPa, and the hot pressing time is 12-24 s.

Background

Melamine faced boards (melamine faced boards) are called melamine impregnated bond paper faced wood-based boards for short. The base material is shaving board and medium density fiberboard, which is made up by adhering base material and surface, and is treated by soaking them in fire-proofing, wear-resisting and water-proofing treatments, and is a decorative board made up by placing paper with different colours or textures into melamine adhesive, soaking them in the melamine adhesive, drying them to a certain solidifying degree, laying them on the surface of shaving board, damp-proof board, medium density fiberboard, plywood, laminated wood board, multi-layer board or other hard fiberboard and hot-pressing them. In the production process, the paper is generally combined by a plurality of layers of paper, and the number of the layers is determined according to the application. The tensile strength and the hardness of the melamine impregnated paper are difficult to be adjusted, generally, the melamine impregnated paper with high strength is high in tensile strength and hardness, the melamine impregnated paper with high strength is difficult to bend and attach to a coating section, the melamine impregnated paper is extremely easy to crack, brittle fracture, tear and the like in the bending process, the production efficiency and the product quality are reduced, some prepared melamine impregnated papers have poor glossiness, and the general surface needs to be coated with high-gloss paint to increase the glossiness.

The accumulation of static electricity can generate a higher potential on the surface of an object, and when a human body or other low-potential conductors approach, a discharge phenomenon can be generated, so that the product quality is damaged, great economic loss is caused, and even the safety of people and equipment can be endangered in severe cases. The package and transportation of electronic products and the antistatic and anti-interference of the indoor environment of buildings become important guarantees for the economic development of the high-tech times. The antistatic performance is one of the performance indexes of the packaging material and the building interior decoration material. At present, the surface of high-brightness melamine impregnated paper is usually coated with a conductive material of an antistatic coating, but the conductive material is easily abraded, and the effect is not ideal.

Disclosure of Invention

The invention aims to provide high-brightness melamine impregnated paper and a production and processing process thereof, so as to solve the problems in the prior art.

In order to solve the technical problems, the invention provides the following technical scheme:

the high-brightness melamine impregnated paper comprises upper glue coating, printing paper subjected to modified urea glue impregnation treatment and lower glue coating from top to bottom.

Preferably, the upper gluing comprises the following raw materials: the melamine glue comprises melamine glue, a release agent, a dedusting agent and a curing agent, wherein 3000ml of the release agent, 900ml of the dedusting agent and 2300ml of the curing agent are added into every 1000 kg of the melamine glue, and the melamine glue comprises the following raw materials: by weight, 2500-2800 kg of formaldehyde, 4000-4500 kg of melamine, 150-180 kg of high-definition assistant and 900-1000 kg of water.

Preferably, the modified urea glue comprises the following raw materials in parts by weight: the urea glue comprises 1500ml of penetrant and 1050ml of curing agent per 450 kg of urea glue, and the urea glue comprises the following raw materials: by weight, the formaldehyde 7400-7800 kg, the urea 3500-4000 kg and the water 600-800 kg.

Preferably, the lower rubber coating comprises the following raw materials in parts by weight: the melamine glue comprises melamine glue, a release agent, a dedusting agent and a curing agent, wherein 800ml of the release agent, 600ml of the dedusting agent and 900ml of the curing agent are added into every 450 kg of the melamine glue, and the melamine glue comprises the following raw materials: by weight, the formaldehyde content is 2500-3000 kg, the melamine content is 4000-4500 kg, the high-definition additive content is 150-200 kg and the water content is 900-1000 kg.

Preferably, the upper coating also comprises an antistatic agent, a sound-absorbing noise-removing agent and a composite coupling agent, the lower coating also comprises an abrasion-resistant agent, the antistatic agent is one or more of graphite powder, molybdenum disulfide quantum dots and conductive mica powder, the particle diameters of the graphite powder and the conductive mica powder are 150-350 meshes, the addition amount of the graphite powder and the conductive mica powder is 3-20 wt% of the upper coating, the sound-absorbing noise-removing agent is one or more of wheat straw carbon fiber and apple carbon fiber, the addition amount of the sound-absorbing noise-removing agent is 10-25 wt% of the upper coating, the plant fiber is mixed with the aluminate coupling agent to obtain the modified active fiber, the composite coupling agent is obtained by mixing the aluminate coupling agent and the silane coupling agent in a mass ratio of 1-2:1, and the addition of the composite coupling agent can improve the dispersibility of the added powder in melamine colloid and is beneficial to the improvement of the mechanical property and the electrical property, the product has excellent water resistance and oil resistance, excellent surface gloss and long service life, and the wear-resisting agent is molybdenum disulfide and aluminum hydroxide in a mass ratio of 1-3: 1 is obtained by compounding.

Preferably, wheat straw cellulose or apple cellulose can be carbonized and treated to obtain wheat straw carbon fiber or apple carbon fiber, molybdenum disulfide quantum dots are easy to gather in melamine colloid, molybdenum disulfide quantum dots are treated in a quantization mode, ultrasonic treatment is carried out, the molybdenum disulfide quantum dots can be attached to the wheat straw carbon fiber or the apple carbon fiber, the activity of the molybdenum disulfide quantum dots and the activity of the wheat straw carbon fiber or the apple carbon fiber are improved, the structure is more stable, the antibacterial property can be enhanced, and the glossiness and the mirror surface effect, the wear resistance, the antistatic property and the sound absorption and noise removal performance of the melamine impregnated paper are greatly improved.

Preferably, the aluminate coupling agent reacts with the wheat straw cellulose or the apple cellulose in the melamine glue to modify the activity of the wheat straw cellulose or the apple cellulose, so that the strength and the flowability of the wheat straw cellulose or the apple cellulose in the melamine impregnated paper are improved, the tensile strength and the elongation at break of the melamine impregnated paper are enhanced, and the air permeability is enhanced.

Preferably, the production and processing technology of the high-brightness melamine impregnated paper comprises the following steps: preparing the upper coating glue, the modified urea glue and the lower coating glue, dipping the printing paper in the modified urea glue, drying the printing paper by a dryer, coating the surface of the printing paper dipped by the modified urea glue by a rubber roller of a coating machine, coating the upper coating glue on the upper surface of the paper by the upper rubber roller, coating the lower coating glue on the lower surface of the paper by the lower rubber roller, drying the paper for the second time after coating, and rolling the upper coating glue on the paper after coating by a rolling wheel to obtain the high-brightness melamine impregnated paper.

Preferably, the production and processing technology of the high-brightness melamine impregnated paper specifically comprises the following steps:

s1: preparing melamine glue in a reaction kettle: adding melamine, a high-definition assistant, water and formaldehyde into a reaction kettle, adding the formaldehyde three times, adjusting the pH value to 9.4, heating to 90-92 ℃, reacting for 50 minutes, naturally heating, keeping the temperature at 93-94 ℃ for 40-45 minutes, observing the mature condition of glue, and naturally cooling to below 40 ℃ to obtain melamine glue;

s2: preparing urea glue in a reaction kettle: adding formaldehyde and urea into a reaction kettle, adding triethanolamine, adjusting the pH value to 8.0, heating for 45 minutes, naturally heating, keeping the temperature at 92 ℃ for 1 hour, adjusting the pH value to 4.5, keeping the temperature at 95.5-97.5 ℃, measuring the fog point by using ice water, gradually increasing the water temperature, observing the mature condition of glue and the fog point reaction, adding the triethanolamine, cooling, adding the urea for the second time when the temperature is reduced to 40 ℃, measuring the pH value, and cooling to 40 ℃ to obtain urea glue;

s3: preparing modified urea glue: adding a penetrant and a curing agent into the urea gel in the S2, and uniformly mixing;

s4: preparing and gluing: adding a release agent, a dedusting agent and a curing agent into the melamine glue in the S1, and uniformly mixing;

s5: preparing and gluing: adding a release agent, a dedusting agent and a curing agent into the melamine glue in the S1, and uniformly mixing;

s6: dipping treatment: dipping the printing paper in the modified urea adhesive prepared in S3;

s7: and (3) drying treatment: drying the printing paper after the modified urea adhesive dipping treatment by a dryer;

s8: coating treatment: coating the surface of the printing paper after the modified urea glue is soaked by a rubber roller of a coating machine, coating the upper surface of the paper with an upper rubber roller, and coating the lower surface of the paper with a lower rubber roller;

s9: secondarily drying the coated printing paper through a dryer;

s10: sticking and pressing: and (3) rolling the coated paper by using a rolling wheel to coat the glue on the paper to obtain the high-brightness melamine impregnated paper.

Preferably, the production and processing technology of the high-brightness melamine impregnated paper is characterized in that: the method specifically comprises the following steps:

s1: preparing melamine glue in a reaction kettle: adding melamine, a high-definition assistant, water and formaldehyde into a reaction kettle, adding the formaldehyde three times, adjusting the pH value to 9.4, heating to 90-92 ℃, reacting for 50 minutes, naturally heating, keeping the temperature at 93-94 ℃ for 40-45 minutes, observing the mature condition of glue, and naturally cooling to below 40 ℃ to obtain melamine glue;

s2: preparing urea glue in a reaction kettle: adding formaldehyde and urea into a reaction kettle, adding triethanolamine, adjusting the pH value to 8.0, heating for 45 minutes, naturally heating, keeping the temperature at 92 ℃ for 1 hour, adjusting the pH value to 4.5, keeping the temperature at 95.5-97.5 ℃, measuring the fog point by using ice water, gradually increasing the water temperature, observing the maturity of the glue, adding the triethanolamine and then cooling when the fog point reacts to 35 ℃, adding the urea for a second time when the temperature is reduced to 40 ℃, measuring the pH value, and cooling to below 40 ℃ to obtain urea glue;

s3: preparing modified urea glue: adding a penetrant and a curing agent into the urea gel in the S2, and uniformly mixing;

s4: preparing and gluing: adding a release agent, a dedusting agent, a curing agent, an antistatic agent, a sound-absorbing noise-removing agent and a composite coupling agent into the melamine glue in S1, uniformly mixing, and performing ultrasonic treatment;

s5: preparing and gluing: adding a release agent, a dedusting agent, a curing agent and an abrasion-resistant agent into the melamine glue in S1, and uniformly mixing;

s6: dipping treatment: dipping the printing paper in the modified urea adhesive prepared in S3;

s7: and (3) drying treatment: drying the printing paper after the modified urea adhesive dipping treatment by a dryer;

s8: coating treatment: coating the surface of the printing paper after the modified urea glue is soaked by a rubber roller of a coating machine, coating the upper surface of the paper with an upper rubber roller, and coating the lower surface of the paper with a lower rubber roller;

s9: secondarily drying the coated printing paper through a dryer;

s10: sticking and pressing: and (3) rolling the coated paper by using a rolling wheel to coat the glue on the paper to obtain the high-brightness melamine impregnated paper.

Preferably, when the sound-absorbing noise-removing agent is wheat straw carbon fiber and apple carbon fiber in a mass ratio of 2:1, the preparation method comprises the following steps: crushing wheat straws and apple peels, adding the crushed wheat straws and apple peels into 4-10 wt% of aqueous alkali according to the weight ratio of 50-70 g of raw materials added into each 100mL of aqueous alkali, stirring the mixture for 3h at 85 ℃, taking the mixture out, washing the mixture to be neutral, drying the mixture, preparing 2-8 wt% of sodium hypochlorite solution, adjusting the pH value to be 4, stirring the dried sample in the sodium hypochlorite solution for 6h at 60 ℃, bleaching the mixture, cleaning the mixture to be neutral, drying the mixture for 10h at 80 ℃ to obtain wheat straw cellulose and apple cellulose, placing the wheat straw cellulose and the apple cellulose in a tube furnace, heating the mixture to 300-650 ℃ at the heating rate of 6-15 ℃/min, calcining the mixture for 2-4 h under the protection of nitrogen, naturally cooling the mixture to obtain wheat straw carbon fiber and apple carbon fiber, and crushing the wheat straw carbon fiber and the apple carbon fiber according to the mass ratio of 2:1, compounding to obtain the sound-absorbing noise-removing agent.

Preferably, the high-gloss melamine impregnated paper and a base material are subjected to hot pressing to obtain the high-gloss melamine board, wherein the base material is a PVC board, the hot pressing temperature is 135-.

The invention has the beneficial effects that:

the high-gloss melamine impregnated paper produced by the method has high gloss, excellent scratch and mirror surface resistance, excellent antistatic property and wear resistance, sound absorption and noise removal effects, static charge accumulation difficulty in the use process, lasting antistatic effect, good surface wear resistance of the high-gloss melamine impregnated paper, and other physical and mechanical properties meeting the corresponding national standards. The melamine impregnated paper has the advantages of rich raw material sources, simple preparation process and equipment, easily controlled process conditions and strong operability, and can be widely applied to the melamine impregnated paper with higher requirements on glossiness, hardness, antistatic property, wear resistance, sound absorption and noise elimination.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the high-gloss melamine impregnated paper of the present invention.

The reference numbers illustrate: 1-upper gluing, 2-printing paper impregnated by modified urea glue, and 3-lower gluing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that if directional indications such as up, down, left, right, front, and rear … … are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship, motion, and the like between the components in a specific posture as shown in the drawings, and if the specific posture is changed, the directional indications are changed accordingly. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 1, the present invention provides a high-gloss melamine-dipped paper, which comprises an upper glue coating layer, a printing paper treated by modified urea glue dipping, and a lower glue coating layer from top to bottom.

In the embodiment, the high-brightness melamine impregnated paper is used on the surfaces of various furniture substrates, and has excellent wear resistance, antistatic property and sound absorption and noise removal properties, so that the service life is long, different types of decoration requirements of customers can be met after different printing papers are replaced on the surfaces of the substrates, and the high-brightness melamine impregnated paper is widely used.

The high-brightness melamine impregnated paper in the embodiment consists of upper coating glue 1, printing paper 2 subjected to modified urea glue impregnation treatment and lower coating glue 3, wherein the printing paper plays a main decoration role and has the gram weight of 100g/m². The melamine glue layer containing the anti-wear agent is used for improving the wear resistance of the high-brightness melamine impregnated paper, and the melamine glue layer containing the antistatic agent and the sound-absorbing noise-removing agent is used for improving the antistatic property and the sound-absorbing noise-removing property of the high-brightness melamine impregnated paper.

The melamine glue mainly plays a protective role on the printing paper, comprises melamine and formaldehyde solution, generates macromolecular melamine formaldehyde glue after the melamine and formaldehyde solution are subjected to polycondensation reaction, is colorless and transparent after being cured, does not influence the decorative effect of the printing paper, still has good stability under the condition of higher temperature below 150 ℃, has good mechanical property, has larger hardness after being coated on the surface of the printing paper, and plays a good protective role on the printing paper. Water as the main component improves the fluidity and the dispersing effect of the melamine coating.

Further, the upper glue coating 1 further comprises a sound-absorbing noise-removing agent, an antistatic agent and a composite coupling agent, wherein the antistatic agent is one or more of graphite powder, molybdenum disulfide quantum dots and conductive mica powder, the particle size of the graphite powder and the particle size of the conductive mica powder are 200 meshes, the addition amount of the graphite powder and the particle size of the conductive mica powder are 12 wt% of the upper glue coating, the sound-absorbing noise-removing agent is one or more of wheat straw carbon fiber and apple carbon fiber, the addition amount of the sound-absorbing noise-removing agent is 10-25 wt% of the upper glue coating, and the composite coupling agent is an aluminate coupling agent and a silane coupling agent in a mass ratio of 2:1, wherein the addition amount is 5-20 wt% of the upper coating, and the wear-resisting agent is molybdenum disulfide and aluminum hydroxide in a mass ratio of 3: 1, the additive amount is 5-10 wt% of lower glue, the particle size of the molybdenum disulfide and the aluminum hydroxide is 200 meshes, the particle size is moderate, the wheat straw cellulose or the apple cellulose can be carbonized to obtain the wheat straw carbon fiber or the apple carbon fiber, molybdenum disulfide quantum dots are easy to gather in melamine colloid, the molybdenum disulfide quantum dots are subjected to quantization treatment and ultrasonic treatment, the molybdenum disulfide quantum dots can be attached to the wheat straw carbon fiber or the apple carbon fiber, the activity of the molybdenum disulfide quantum dots and the wheat straw carbon fiber or the apple carbon fiber is improved, the structure is more stable, the toughness, the wear resistance, the antistatic property and the sound absorption and noise removal performance of the melamine impregnated paper are greatly improved, an aluminate coupling agent reacts with the wheat straw cellulose or the apple cellulose in melamine glue to modify the activity of the wheat straw cellulose or the apple cellulose, the strength of the wheat straw cellulose or the apple cellulose in the high-gloss melamine impregnated paper is improved, The fluidity, the tensile strength and the elongation at break of the high-gloss melamine impregnated paper are enhanced, and the air permeability is enhanced.

The pH value of the mixed melamine glue is 9.4, the melamine and the formaldehyde solution react under the alkaline condition to generate stable methylol melamine, methylene melamine precipitate without reaction capacity is not generated, and the condensation polymerization reaction is inhibited.

The technical solutions of the present invention are further described in detail with reference to the following specific examples, which should be understood as merely illustrative and not limitative.

Example 1

S1: preparing melamine glue in a reaction kettle, adding 4000 kg of melamine, 150 kg of high-definition auxiliary agent, 900 kg of water and 2500 kg of formaldehyde into the reaction kettle, adding the formaldehyde three times, adjusting the pH value to 9.4, reacting for 50 minutes at the temperature of 92 ℃, preserving heat at 93 ℃, reacting for 40 minutes at the time of the melamine glue, observing the mature condition of the glue, cooling the glue to the temperature of 50 ℃ to obtain the melamine glue below 40 ℃, and obtaining the performance of the melamine glue within 1.6 hour of total glue preparation time: viscosity 14.5, water soluble 1: 1.2, cloud point 49, pH 7.9;

s2: preparing urea glue in a reaction kettle: preparing urea glue in a reaction kettle, adding 7400 kg of formaldehyde, 3500 kg of urea and 5000ml of triethanolamine into the reaction kettle, adjusting the pH value to 8.0, heating to 85 ℃, naturally heating, preserving the temperature for 1 hour at 92 ℃, adding acid twice at intervals of 3 minutes, adjusting the pH value to 4.5, preserving the temperature at 95.5 ℃, measuring the fog point by using ice water for 50 minutes for one hour, gradually increasing the water temperature, observing the mature condition of the glue, adding 8000ml of triethanolamine when the fog point reacts to 35 ℃, cooling again, adding 1470 kg of urea twice when the temperature is reduced to 50 ℃, adjusting the pH value to 7.0, cooling to below 40 ℃, and obtaining the performance of the urea glue: viscosity 12.8; dissolving in water, 1: 3.0, cloud point 34, pH 7.0;

s3: preparing modified urea glue: adding a penetrant and a curing agent into the urea glue in the S2, adding 1500ml of penetrant and 1050ml of curing agent into each 450 kg of urea glue, and uniformly mixing;

s4: preparing and gluing: adding a release agent, a dedusting agent and a curing agent into the melamine glue in S1, adding 3000ml of the release agent, 900ml of the dedusting agent and 2300ml of the curing agent into every 1000 kg of the melamine glue, and uniformly mixing;

s5: preparing and gluing: adding a release agent, a dedusting agent and a curing agent into the melamine glue in S1, adding 800ml of the release agent, 600ml of the dedusting agent and 900ml of the curing agent into every 450 kg of the melamine glue, and uniformly mixing;

s6: dipping treatment: dipping the printing paper in the modified urea adhesive prepared in S3;

s7: and (3) drying treatment: drying the printing paper after the modified urea adhesive dipping treatment by a dryer;

s8: coating treatment: coating the surface of the printing paper after the modified urea glue is soaked by a rubber roller of a coating machine, coating the upper surface of the paper with an upper rubber roller, and coating the lower surface of the paper with a lower rubber roller;

s9: secondarily drying the coated printing paper through a dryer;

s10: sticking and pressing: and (3) rolling the coated paper by using a rolling wheel to coat the glue on the paper to obtain the high-brightness melamine impregnated paper.

Example 2

S1: preparing melamine glue in a reaction kettle, adding 4250 kg of melamine, 160 kg of high-definition assistant, 950 kg of water and 2600 kg of formaldehyde into the reaction kettle, adding the formaldehyde three times, adjusting the pH value to 9.4, reacting for 50 minutes at the temperature of 92 ℃, preserving heat at 93.5 ℃, reacting for 43 minutes at the time of melamine glue, observing the glue maturation condition, cooling the water temperature to 52 ℃ to obtain the melamine glue, and cooling to below 40 ℃ to obtain the melamine glue, wherein the total glue preparation time is 1.5 hours, and the performance of the obtained melamine glue is as follows: viscosity 15.4, water soluble 1: 1.6, a fog point of 50 and a pH value of 8.2;

s2: preparing urea glue in a reaction kettle, preparing the urea glue in the reaction kettle, adding 7500 kg of formaldehyde, 3550 kg of urea, 700 kg of water and 5000ml of triethanolamine into the reaction kettle, adjusting the pH value to 8.0, heating to 85 ℃, naturally heating, preserving the heat at 92 ℃ for 1 hour, adding acid twice at intervals of 3 minutes, adjusting the pH value to 4.5, preserving the heat at 96 ℃, measuring the fog point by using ice water within 50 minutes, gradually measuring the water temperature, observing the maturation condition of the glue, adding 8000ml of triethanolamine when the fog point reacts to 35 ℃, cooling again, adding 1491 kg of urea twice when the temperature is reduced to 50 ℃, adjusting the pH value to 7.2, placing the glue after the reaction is finished, and cooling to below 40 ℃ to obtain the performance of the urea glue: viscosity 13.9, water soluble 1: 3.5, cloud point 35, pH 7.2;

s3: preparing modified urea glue: adding a penetrant and a curing agent into the urea glue in the S2, adding 1500ml of penetrant and 1050ml of curing agent into each 450 kg of urea glue, and uniformly mixing;

s4: preparing and gluing: adding a release agent, a dedusting agent and a curing agent into the melamine glue in S1, adding 3000ml of the release agent, 900ml of the dedusting agent and 2300ml of the curing agent into every 1000 kg of the melamine glue, and uniformly mixing;

s5: preparing and gluing: adding a release agent, a dedusting agent and a curing agent into the melamine glue in S1, adding 800ml of the release agent, 600ml of the dedusting agent and 900ml of the curing agent into every 450 kg of the melamine glue, and uniformly mixing;

s6: dipping treatment: dipping the printing paper in the modified urea adhesive prepared in S3;

s7: and (3) drying treatment: drying the printing paper after the modified urea adhesive dipping treatment by a dryer;

s8: coating treatment: coating the surface of the printing paper after the modified urea glue is soaked by a rubber roller of a coating machine, coating the upper surface of the paper with an upper rubber roller, and coating the lower surface of the paper with a lower rubber roller;

s9: secondarily drying the coated printing paper through a dryer;

s10: sticking and pressing: and (3) rolling the coated paper by using a rolling wheel to coat the glue on the paper to obtain the high-brightness melamine impregnated paper.

Example 3

S1: preparing melamine glue in a reaction kettle, adding 4500 kg of melamine, 180 kg of high-definition assistant, 1000 kg of water and 2800 kg of formaldehyde into the reaction kettle, adding the formaldehyde three times, adjusting the pH value to 9.4, reacting for 50 minutes at the temperature of 92 ℃, preserving the temperature at 94 ℃, and reacting for 45 minutes at the time of the melamine glue; and (3) observing the glue maturation condition, wherein the glue is mature at the water temperature of 53 ℃, the melamine glue is obtained after being cooled to the temperature below 40 ℃, the total glue preparation time is 1.6 hours, and the performance of the obtained melamine glue is as follows: viscosity 14.4, water soluble 1: 1.1, cloud point 48, pH 7.8;

s2: preparing urea glue in a reaction kettle, preparing the urea glue in the reaction kettle, adding 7800 kg of formaldehyde, 4000 kg of urea and 5000ml of triethanolamine into the reaction kettle, adjusting the pH to 8.0, heating to 85 ℃, then naturally heating, keeping the temperature at 92 ℃ for 1 hour, adding acid twice at intervals of 3 minutes, adjusting the pH to 4.5, keeping the temperature at 97.5 ℃, measuring a fog point with ice water for 50 minutes for one hour, gradually increasing the water temperature, observing the maturation condition of the glue, adding 8000ml of triethanolamine when the fog point reacts to 35 ℃, then cooling, adding 1680 kg of urea twice when the temperature is reduced to 50 ℃, adjusting the pH to 7.0, placing the glue after the reaction is finished, and cooling to below 40 ℃, wherein the performance of the obtained urea glue is as follows: viscosity 12.7, water soluble 1: 3.2, cloud point 33, pH 7.1;

s3: preparing modified urea glue: adding a penetrant and a curing agent into the urea glue in the S2, adding 1500ml of penetrant and 1050ml of curing agent into each 450 kg of urea glue, and uniformly mixing;

s4: preparing and gluing: adding a release agent, a dedusting agent and a curing agent into the melamine glue in S1, adding 3000ml of the release agent, 900ml of the dedusting agent and 2300ml of the curing agent into every 1000 kg of the melamine glue, and uniformly mixing;

s5: preparing and gluing: adding a release agent, a dedusting agent and a curing agent into the melamine glue in S1, adding 800ml of the release agent, 600ml of the dedusting agent and 900ml of the curing agent into every 450 kg of the melamine glue, and uniformly mixing;

s6: dipping treatment: dipping the printing paper in the modified urea adhesive prepared in S3;

s7: and (3) drying treatment: drying the printing paper after the modified urea adhesive dipping treatment by a dryer;

s8: coating treatment: coating the surface of the printing paper after the modified urea glue is soaked by a rubber roller of a coating machine, coating the upper surface of the paper with an upper rubber roller, and coating the lower surface of the paper with a lower rubber roller;

s9: secondarily drying the coated printing paper through a dryer;

s10: sticking and pressing: and (3) rolling the coated paper by using a rolling wheel to coat the glue on the paper to obtain the high-brightness melamine impregnated paper.

Example 4

S1: preparing melamine glue in a reaction kettle, adding 4250 kg of melamine, 160 kg of high-definition assistant, 950 kg of water and 2600 kg of formaldehyde into the reaction kettle, adding the formaldehyde three times, adjusting the pH value to 9.4, reacting for 50 minutes at the temperature of 92 ℃, preserving heat at 93.5 ℃, reacting for 43 minutes at the time of melamine glue, observing the mature condition of the glue, cooling the glue to below 40 ℃ to obtain the melamine glue, and totally preparing the melamine glue for 1.5 hours, wherein the performance of the obtained melamine glue is as follows: viscosity 15.4, water soluble 1: 1.6, a fog point of 50 and a pH value of 8.2;

s2: preparing urea glue in a reaction kettle, preparing the urea glue in the reaction kettle, adding 7500 kg of formaldehyde, 3550 kg of urea and 700 kg of water into the reaction kettle, adding 5000ml of triethanolamine, adjusting the pH value to 8.0, heating to 85 ℃, naturally heating, preserving the heat at 92 ℃ for 1 hour, adding acid twice at intervals of 3 minutes, adjusting the pH value to 4.5, preserving the heat at 96 ℃, measuring the fog point by using ice water within 50 minutes, gradually increasing the water temperature, observing the maturity of the glue, adding 8000ml of triethanolamine when the fog point reacts to 35 ℃, cooling again, adding 1491 kg of urea twice when the temperature is reduced to 50 ℃, adjusting the pH value to 7.2, placing the glue after the reaction is finished, and cooling to below 40 ℃, wherein the performance of the obtained urea glue is as follows: viscosity 13.9, water soluble 1: 3.5, cloud point 35, pH 7.2;

s3: preparing modified urea glue: adding a penetrant and a curing agent into the urea glue in the S2, adding 1500ml of penetrant and 1050ml of curing agent into each 450 kg of urea glue, and uniformly mixing;

s4: preparing and gluing: adding a release agent, a dedusting agent, a curing agent, an antistatic agent, a sound-absorbing noise-removing agent and a composite coupling agent into the melamine glue in S1, adding 3000ml of the release agent, 900ml of the dedusting agent, 2300ml of the curing agent, 120 kg of the antistatic agent, 200 kg of the sound-absorbing noise-removing agent and 100 kg of the composite coupling agent into every 1000 kg of the melamine glue, and uniformly mixing;

s5: preparing and gluing: adding a release agent, a dedusting agent, a curing agent and an abrasion-resistant agent into the melamine glue in S1, wherein 800ml of the release agent, 600ml of the dedusting agent, 900ml of the curing agent and 45 kg of the abrasion-resistant agent are added into each 450 kg of the melamine glue;

s6: dipping treatment: dipping the printing paper in the modified urea adhesive prepared in S3;

s7: and (3) drying treatment: drying the printing paper after the modified urea adhesive dipping treatment by a dryer;

s8: coating treatment: coating the surface of the printing paper after the modified urea glue is soaked by a rubber roller of a coating machine, coating the upper surface of the paper with an upper rubber roller, and coating the lower surface of the paper with a lower rubber roller;

s9: secondarily drying the coated printing paper through a dryer;

s10: sticking and pressing: and (3) rolling the coated paper by using a rolling wheel to coat the glue on the paper to obtain the high-brightness melamine impregnated paper.

Example 5

In example 4, the amount of the composite coupling agent added per 1000 kg of melamine adhesive is changed to 50 kg, and other reactions are normal.

Example 6

In example 4, the addition amount of the composite coupling agent is changed to 200 kg per 1000 kg of melamine adhesive, and other reactions are normal.

And (3) carrying out hot pressing on the high-gloss melamine impregnated paper in the above examples 1-6 and the surface of the PVC board to obtain the high-gloss melamine board, wherein the hot pressing temperature is 175 ℃, the hot pressing pressure is 18MPa, and the hot pressing time is 16 s.

And (3) sound absorption coefficient determination: according to ISO and national standard, the sound absorption coefficient is measured by a standing wave tube method.

The abrasion resistance was measured by a film abrasion tester, and under a certain load, after the film was ground by a rubber grindstone at a predetermined number of revolutions, the pattern retention was determined, the surface of examples 1 to 6 was ground with a rotor of 100r/min for a specific time of 1min, and the volume resistivity and the surface resistivity were measured to detect the formaldehyde emission.

The melamine sheets obtained in examples 1 to 6 were examined for steam resistance, corrosion resistance, color fastness to light, and hardness according to examination standard BD-W-090-.

In examples 1 to 6, the performance test parameters of the high-gloss melamine impregnated paper obtained by hot-pressing the high-gloss melamine impregnated paper with the PVC plate are shown in the following table:

as can be seen from Table 1, the high-gloss melamine impregnated paper has the advantages of good wear resistance, antistatic property, sound absorption and noise removal property, high gloss, excellent scratch resistance and mirror effect, less formaldehyde emission and excellent mechanical property. After the high-gloss melamine impregnated paper prepared by the raw material formula and the preparation method is combined with a base material, the high-gloss melamine impregnated paper has excellent wear resistance, antistatic property, sound absorption and noise removal performance, high gloss, excellent scratch resistance and mirror surface effect and longer service life.

TABLE 1

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.