1. The utility model provides a fire-retardant natural leather is used to furniture, includes leather basic unit (1), rhombus groove (2), diamond-shaped block (3), interior insulating layer (4), outer insulating layer (5), cross groove (6), cross block (7), interior shaping layer (8), outer shaping layer (9), interior flame retardant coating (10), outer flame retardant coating (11), interior flame retardant coating (12) and outer flame retardant coating (13), its characterized in that: the leather base layer is characterized in that the inner side and the outer side of the leather base layer (1) are fixedly bonded with the outer side of the inner heat insulation layer (4) and the inner side of the outer heat insulation layer (5) through diamond-shaped grooves (2) and diamond-shaped blocks (3), the inner side of the inner heat insulation layer (4) and the outer side of the outer heat insulation layer (5) are fixedly bonded with the outer side of the inner plastic layer (8) and the inner side of the outer plastic layer (9) through cross grooves (6) and cross blocks (7), the inner side of the inner plastic layer (8) and the outer side of the outer plastic layer (9) are fixedly bonded with the outer side of the inner bacterium inhibiting layer (10) and the inner side of the outer bacterium inhibiting layer (11), and the outer sides of the inner bacterium inhibiting layer (10) and the outer bacterium inhibiting layer (11) are fixedly bonded with the outer side of the inner flame retardant layer (12) and the inner side of the outer flame retardant layer (13) respectively.

2. The flame-retardant natural leather for furniture according to claim 1, characterized in that: the diamond-shaped grooves (2) are respectively and uniformly arranged on the inner side and the outer side of the leather base layer (1), diamond blocks (3) are embedded in the diamond-shaped grooves (2), and the diamond blocks (3) are respectively and uniformly arranged on the outer side of the inner heat insulation layer (4) and the inner side of the outer heat insulation layer (5).

3. The flame-retardant natural leather for furniture according to claim 1, characterized in that: the inner side of the inner heat insulation layer (4) and the outer side of the outer heat insulation layer (5) are respectively and uniformly arranged in the cross grooves (6), cross blocks (7) are embedded in the cross grooves (6), and the outer sides of the inner plastic layer (8) and the inner sides of the outer plastic layer (9) are respectively and uniformly arranged in the cross blocks (7).

4. A preparation method of flame-retardant natural leather for furniture comprises the following steps: step one, dispersing; step two, modification; step three, printing; step four, preparing a membrane; step five, bonding; step six, coating; the method is characterized in that:

in the first step, a proper amount of ammonium polyphosphate is taken and put into an ultrasonic dispersion machine, a proper amount of absolute ethyl alcohol is added, and the ammonium polyphosphate is completely dispersed in the absolute ethyl alcohol by utilizing ultrasonic oscillation to obtain an ammonium polyphosphate suspension;

pouring the ammonium polyphosphate turbid liquid obtained in the step one into a container, placing the container on a magnetic stirrer, adding a proper amount of surfactant, mixing and stirring uniformly, then transferring the mixture into a water bath, heating at high temperature, condensing and refluxing, circulating for a plurality of times, discharging organic waste gas, transferring the organic waste gas into a rotary evaporator, rotating and heating at high temperature, and discharging organic waste liquid to obtain concentrated near-dry modified flame retardant liquid;

in the third step, the primarily processed natural leather is placed on an ultrasonic printing machine, a prefabricated printing mold is installed, and the diamond patterns are printed on two surfaces of the natural leather by utilizing ultrasonic impact to obtain the printing leather with the diamond grooves (2);

according to the fourth step, the preset amount of asbestos powder and bamboo charcoal powder are obtained according to production requirements and are respectively placed in a stirrer, a proper amount of aqueous adhesive is added, the mixture is uniformly mixed and stirred, then the mixture is respectively poured into an injection molding machine and is injected into a prefabricated molding die, after die assembly, cooling, die opening and edge cutting, a heat insulation film and a bacteriostatic film which are provided with diamond blocks (3) and cross blocks (7) are respectively obtained, then the preset amount of polyethylene resin is obtained according to production requirements and is poured into the injection molding machine and is injected into the prefabricated molding die, and after die assembly, cooling, die opening and edge cutting, a molded film with cross grooves (6) is obtained;

in the fifth step, the printed leather obtained in the third step is placed on an ultrasonic laminating machine, and the heat insulation film, the shaping film and the antibacterial film obtained in the fourth step are sequentially bonded on two sides of the printed leather by ultrasonic heating and rolling to obtain a blank with a leather base layer (1), a diamond groove (2), a diamond block (3), an inner heat insulation layer (4), an outer heat insulation layer (5), a cross groove (6), a cross block (7), an inner shaping layer (8), an outer shaping layer (9), an inner antibacterial layer (10) and an outer antibacterial layer (11);

and in the sixth step, the blank obtained in the fifth step is placed on a coating machine, the modified flame retardant liquid obtained in the second step is filled, the modified flame retardant liquid is uniformly coated on two sides of the blank by utilizing high-pressure air, and the modified flame retardant liquid is condensed into a film after being cooled, so that the flame-retardant natural leather for furniture, which is provided with a leather base layer (1), a rhombic groove (2), a rhombic block (3), an inner heat insulation layer (4), an outer heat insulation layer (5), a crossed groove (6), a crossed block (7), an inner plastic layer (8), an outer plastic layer (9), an inner antibacterial layer (10), an outer antibacterial layer (11), an inner flame-retardant layer (12) and an outer flame-retardant layer (13), is obtained.

5. The method for preparing the flame-retardant natural leather for furniture according to claim 4, wherein the method comprises the following steps: in the first step, the working frequency of the ultrasonic dispersion machine is 5-12 kHz, and the dispersion time is 8-13 min.

6. The method for preparing the flame-retardant natural leather for furniture according to claim 4, wherein the method comprises the following steps: in the second step, the stirring speed of the magnetic stirrer is 150-200 r/min, and the stirring time is 10-15 min.

7. The method for preparing the flame-retardant natural leather for furniture according to claim 4, wherein the method comprises the following steps: in the second step, the heating temperature of the water bath is 115-125 ℃, the condensation temperature is 12-18 ℃, and the cycle time is 3-5 times.

8. The method for preparing the flame-retardant natural leather for furniture according to claim 4, wherein the method comprises the following steps: in the second step, the rotating speed of the rotary evaporator is 360-480 r/s, and the heating temperature is 105-110 ℃.

Background

As a natural polymer material, the natural leather has unique structural characteristics, has human body affinity compared with common synthetic leather or artificial leather due to incomparable advantages of real leather, is popular with consumers and is widely used in the fields of clothing, furniture and the like. But at the same time, the safety problem of natural leather has also attracted more and more attention from consumers and manufacturers.

At present, natural leather on the market mostly has the problem of easily firing, the use is meeting the heat burning easily, cause the conflagration when serious, cause certain personnel and loss of property, the security performance is relatively poor, and do not possess antibacterial function, breed the germ easily in storage and the use, personnel's healthy has been endangered, the life of goods has been shortened, be difficult for long-term storage, a small part of natural leather obtains the fire resistance through the mode that adds the ammonium polyphosphate, but not modify the ammonium polyphosphate, its thermal stability is relatively poor, fire-retardant function reliability is poor, be difficult to satisfy the user demand of furniture.

Disclosure of Invention

The invention aims to provide flame-retardant natural leather for furniture and a preparation method thereof, and aims to solve the problems of flammability, poor safety and germ breeding in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a fire-retardant natural leather for furniture, includes leather basic unit, rhombus groove, diamond-shaped piece, interior heat insulating layer, outer insulating layer, cross groove, cross piece, interior shaping layer, outer shaping layer, interior antibacterial layer, outer antibacterial layer, interior flame retardant layer and outer flame retardant layer, the inboard and the outside of leather basic unit all through rhombus groove and diamond-shaped piece respectively with the outside of interior heat insulating layer and the inboard fixed bonding of outer insulating layer, the inboard of interior heat insulating layer and the outside of outer insulating layer all through cross groove and cross piece respectively with the outside of interior shaping layer and the inboard fixed bonding of outer shaping layer, the inboard of interior shaping layer and the outside of outer shaping layer respectively with the outside of interior antibacterial layer and the inboard fixed bonding of outer antibacterial layer, the inboard of interior antibacterial layer and the outside of outer antibacterial layer respectively with the outside of interior flame retardant layer and the inboard fixed bonding of outer flame retardant layer.

Preferably, the rhombic grooves are respectively and uniformly arranged on the inner side and the outer side of the leather base layer, the rhombic blocks are embedded in the rhombic grooves and are respectively and uniformly arranged on the outer side of the inner heat insulation layer and the inner side of the outer heat insulation layer.

Preferably, the cross grooves are respectively and uniformly formed in the inner side of the inner heat insulation layer and the outer side of the outer heat insulation layer, cross blocks are embedded in the cross grooves, and the cross blocks are respectively and uniformly formed in the outer side of the inner shaping layer and the inner side of the outer shaping layer.

A preparation method of flame-retardant natural leather for furniture comprises the following steps: step one, dispersing; step two, modification; step three, printing; step four, preparing a membrane; step five, bonding; step six, coating;

in the first step, a proper amount of ammonium polyphosphate is taken and put into an ultrasonic dispersion machine, a proper amount of absolute ethyl alcohol is added, and the ammonium polyphosphate is completely dispersed in the absolute ethyl alcohol by utilizing ultrasonic oscillation to obtain an ammonium polyphosphate suspension;

pouring the ammonium polyphosphate turbid liquid obtained in the step one into a container, placing the container on a magnetic stirrer, adding a proper amount of surfactant, mixing and stirring uniformly, then transferring the mixture into a water bath, heating at high temperature, condensing and refluxing, circulating for a plurality of times, discharging organic waste gas, transferring the organic waste gas into a rotary evaporator, rotating and heating at high temperature, and discharging organic waste liquid to obtain concentrated near-dry modified flame retardant liquid;

in the third step, the primarily processed natural leather is placed on an ultrasonic printing machine, a prefabricated printing mold is installed, and the diamond patterns are printed on two surfaces of the natural leather by utilizing ultrasonic impact to obtain the printing leather with diamond grooves;

according to the fourth step, according to the production requirement, the preset amount of asbestos powder and bamboo charcoal powder are taken and respectively placed in a stirrer, a proper amount of aqueous adhesive is added, the mixture is uniformly stirred, then the mixture is respectively poured into an injection molding machine and injected into a prefabricated molding die, after die assembly, cooling, die opening and edge cutting, a heat insulation film and a bacteriostatic film with diamond blocks and cross blocks are respectively obtained, then the preset amount of polyethylene resin is taken according to the production requirement and poured into the injection molding machine and injected into the prefabricated molding die, and after die assembly, cooling, die opening and edge cutting, a molded film with cross grooves is obtained;

placing the printed leather obtained in the third step on an ultrasonic laminating machine, and bonding the heat insulation film, the shaping film and the antibacterial film obtained in the fourth step on two surfaces of the printed leather in sequence by utilizing ultrasonic heating and rolling to obtain a blank with a leather base layer, a rhombic groove, a rhombic block, an inner heat insulation layer, an outer heat insulation layer, a crossed groove, a crossed block, an inner shaping layer, an outer shaping layer and an inner antibacterial layer;

and sixthly, placing the blank obtained in the fifth step on a coating machine, filling the modified flame retardant liquid obtained in the second step, uniformly coating the modified flame retardant liquid on two sides of the blank by utilizing high-pressure air, and cooling and condensing to form a film to obtain the flame-retardant natural leather for furniture, wherein the flame-retardant natural leather is provided with a leather base layer, a rhombic groove, a rhombic block, an inner heat insulation layer, an outer heat insulation layer, a crossed groove, a crossed block, an inner shaping layer, an outer shaping layer, an inner antibacterial layer, an outer antibacterial layer, an inner flame-retardant layer and an outer flame-retardant layer.

Preferably, in the step one, the working frequency of the ultrasonic dispersion machine is 5-12 kHz, and the dispersion time is 8-13 min.

Preferably, in the second step, the stirring speed of the magnetic stirrer is 150-200 r/min, and the stirring time is 10-15 min.

Preferably, in the second step, the heating temperature of the water bath is 115-125 ℃, the condensation temperature is 12-18 ℃, and the cycle time is 3-5 times.

Preferably, in the second step, the rotating speed of the rotary evaporator is 360-480 r/s, and the heating temperature is 105-110 ℃.

Compared with the prior art, the invention has the beneficial effects that: according to the flame-retardant natural leather for furniture and the preparation method, the modified ammonium polyphosphate is added, so that the leather has lower flame spread rate and heat release rate, no molten drop phenomenon exists during combustion, the smoke generation amount is small, the smoke toxicity is low, a certain self-extinguishing effect is realized, the leather is not easy to combust when being heated, the fire risk is reduced, the personnel and property are protected from being lost, the safety of the leather is enhanced, and the ammonium polyphosphate is modified by the surfactant, so that the heat stability of the ammonium polyphosphate is improved, the flame retardance is reliable, and the use requirement of the furniture is met; by adding the bamboo charcoal, the leather has an antibacterial function, is not easy to breed germs during storage and use, ensures the health of personnel, prolongs the service life of products and is easy to store for a long time.

Drawings

FIG. 1 is a front cross-sectional view of the overall construction of the present invention;

FIG. 2 is a top view of the leather substrate of the present invention;

FIG. 3 is a top view of the inner shaping layer of the present invention;

FIG. 4 is a partial perspective view of the leather substrate of the present invention;

FIG. 5 is a partial perspective view of the outer insulation layer of the present invention;

FIG. 6 is a flow chart of a method of the present invention;

in the figure: 1. a leather base layer; 2. a diamond-shaped groove; 3. diamond-shaped blocks; 4. an inner insulating layer; 5. an outer insulating layer; 6. a cross groove; 7. a cross block; 8. an inner shaping layer; 9. an outer shaping layer; 10. an inner bacteriostatic layer; 11. an outer bacteriostatic layer; 12. an inner flame retardant layer; 13. an outer flame retardant layer.

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.

Referring to fig. 1-5, an embodiment of the present invention is shown: a flame-retardant natural leather for furniture comprises a leather base layer 1, a rhombic groove 2, a rhombic block 3, an inner heat insulation layer 4, an outer heat insulation layer 5, a crossed groove 6, a crossed block 7, an inner shaping layer 8, an outer shaping layer 9, an inner bacteriostatic layer 10, an outer bacteriostatic layer 11, an inner flame-retardant layer 12 and an outer flame-retardant layer 13, wherein the inner side and the outer side of the leather base layer 1 are fixedly bonded with the outer side of the inner heat insulation layer 4 and the inner side of the outer heat insulation layer 5 respectively through the rhombic groove 2 and the rhombic block 3, the rhombic grooves 2 are uniformly formed in the inner side and the outer side of the leather base layer 1 respectively, the rhombic block 3 is embedded in the rhombic groove 2, the rhombic blocks 3 are uniformly arranged on the outer side of the inner heat insulation layer 4 and the inner side of the outer heat insulation layer 5 respectively, the inner side of the inner heat insulation layer 4 and the outer side of the outer heat insulation layer 5 are fixedly bonded with the outer side of the inner shaping layer 8 and the inner side of the outer heat insulation layer 9 respectively through the crossed groove 6 and the crossed block 7, the cross grooves 6 are respectively and uniformly arranged on the inner side of the inner heat insulation layer 4 and the outer side of the outer heat insulation layer 5, the cross blocks 7 are embedded in the cross grooves 6, the cross blocks 7 are respectively and uniformly arranged on the outer side of the inner plastic layer 8 and the inner side of the outer plastic layer 9, the inner side of the inner plastic layer 8 and the outer side of the outer plastic layer 9 are respectively and fixedly bonded with the outer side of the inner antibacterial layer 10 and the inner side of the outer antibacterial layer 11, and the inner side of the inner antibacterial layer 10 and the outer side of the outer antibacterial layer 11 are respectively and fixedly bonded with the outer side of the inner flame retardant layer 12 and the inner side of the outer flame retardant layer 13.

Referring to fig. 6, an embodiment of the present invention: a preparation method of flame-retardant natural leather for furniture comprises the following steps: step one, dispersing; step two, modification; step three, printing; step four, preparing a membrane; step five, bonding; step six, coating;

in the first step, a proper amount of ammonium polyphosphate is placed in an ultrasonic dispersion machine with the frequency of 5-12 kHz, a proper amount of absolute ethyl alcohol is added, and the ammonium polyphosphate is completely dispersed in the absolute ethyl alcohol by utilizing ultrasonic oscillation for 8-13 min to obtain an ammonium polyphosphate suspension;

pouring the ammonium polyphosphate turbid liquid obtained in the step one into a container, placing the container on a magnetic stirrer, adding a proper amount of surfactant, stirring at 150-200 r/min for 10-15 min, uniformly mixing, transferring into a water bath kettle, heating at the high temperature of 115-125 ℃, condensing and refluxing at the temperature of 12-18 ℃, circulating for 3-5 times, discharging organic waste gas, transferring into a rotary evaporator, rotating at 360-480 r/s, heating at the high temperature of 105-110 ℃, discharging organic waste liquid, and obtaining concentrated near-dry modified flame retardant liquid;

in the third step, the primarily processed natural leather is placed on an ultrasonic printing machine, a prefabricated printing mold is installed, and the diamond patterns are printed on two surfaces of the natural leather by utilizing ultrasonic impact to obtain the printing leather with the diamond grooves 2;

according to the fourth step, according to the production requirement, the preset amount of asbestos powder and bamboo charcoal powder are taken, and are respectively placed into a stirrer, a proper amount of aqueous adhesive is added, the mixture is uniformly mixed and stirred, then the mixture is respectively poured into an injection molding machine and is injected into a prefabricated molding die, after die assembly, cooling, die opening and edge cutting, a heat insulation film and an antibacterial film with diamond blocks 3 and cross blocks 7 are respectively obtained, then the preset amount of polyethylene resin is taken according to the production requirement, is poured into the injection molding machine and is injected into the prefabricated molding die, and after die assembly, cooling, die opening and edge cutting, a molded film with cross grooves 6 is obtained;

placing the printed leather obtained in the third step on an ultrasonic laminating machine, and bonding the heat insulation film, the shaping film and the antibacterial film obtained in the fourth step on two surfaces of the printed leather in sequence by utilizing ultrasonic heating and rolling to obtain a blank with a leather base layer 1, a rhombic groove 2, a rhombic block 3, an inner heat insulation layer 4, an outer heat insulation layer 5, a crossed groove 6, a crossed block 7, an inner shaping layer 8, an outer shaping layer 9, an inner antibacterial layer 10 and an outer antibacterial layer 11;

and in the sixth step, the blank obtained in the fifth step is placed on a coating machine, the modified flame retardant liquid obtained in the second step is filled, the modified flame retardant liquid is uniformly coated on two sides of the blank by utilizing high-pressure air, and the modified flame retardant liquid is condensed into a film after being cooled, so that the flame-retardant natural leather for furniture, which is provided with a leather base layer 1, a rhombic groove 2, a rhombic block 3, an inner heat insulation layer 4, an outer heat insulation layer 5, a crossed groove 6, a crossed block 7, an inner plastic layer 8, an outer plastic layer 9, an inner antibacterial layer 10, an outer antibacterial layer 11, an inner flame-retardant layer 12 and an outer flame-retardant layer 13, is obtained.

Based on the above, the invention has the advantages that when the modified ammonium polyphosphate leather is used, the bamboo charcoal is added, so that the leather has an antibacterial function, germs are not easy to breed in storage and use, the health of personnel is guaranteed, the service life of a product is prolonged, the modified ammonium polyphosphate is easy to store for a long time, the leather has lower flame spread rate and heat release rate, no molten drop phenomenon exists during combustion, the smoke generation amount is small, the smoke toxicity is low, a certain self-extinguishing effect is realized, the modified ammonium polyphosphate leather is not easy to combust when being heated, the fire risk is reduced, the personnel and property are protected from being lost, the safety of the leather is enhanced, and meanwhile, the ammonium polyphosphate is modified by the surfactant, so that the thermal stability of the ammonium polyphosphate is improved, the flame retardance is reliable, and the use requirements of furniture are met.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.