1. A kind of filmless metal type wrapping paper, characterized by, from top to bottom include the base paper ply, tie coat, waterproof copper plate paper ply, aluminize the coating of bearing layer, aluminize the layer, suitable for printing the protective layer sequentially;

the aluminized bearing layer coating is prepared from the following raw materials in parts by weight: 50-60 parts of acrylic emulsion, 16-20 parts of acrylic resin, 1-2 parts of plasticizer, 1-3 parts of ammonia water and 24-36 parts of solvent.

2. The filmless metal-type wrapping paper of claim 1, wherein said solvent is selected from the group consisting of absolute ethyl alcohol, water, ethyl acetate, butyl acetate, in accordance with (1-2): (1-1.5): (1-1.5): (0.8-1) in weight ratio.

3. The filmless metal-type wrapping paper of claim 2, wherein the solvent is selected from the group consisting of absolute ethyl alcohol, water, ethyl acetate, butyl acetate in a ratio of 1: 1: 1: 0.8 in weight ratio.

4. The filmless metal-type wrapping paper of claim 1, wherein the anhydrous ethanol is 15-17 parts, the distilled water is 10-13 parts, and the plasticizer is one or a combination of dimethyl phthalate, diethyl phthalate and dioctyl phthalate.

5. The filmless metal-type wrapping paper of claim 1, further comprising 5 to 8 parts of glycerol triglycidyl ether.

6. The film-free metal-type wrapping paper of claim 1, wherein the aluminum-plated layer has a thickness of 315 a-385 a.

7. A method of producing a filmless metal-type wrapping paper of any one of claims 1 to 6, comprising the steps of:

s1, preparing aluminum-plated bearing layer paint

Uniformly mixing acrylic emulsion, acrylic resin, a solvent, a plasticizer, ammonia water and glycerol triglycidyl ether according to a ratio to obtain an aluminized bearing layer coating;

s2 coating aluminum-plated bearing layer paint

Coating an aluminized bearing coating on the surface of the waterproof coated paper, forming an aluminized bearing layer on the waterproof coated paper, and drying and rolling to obtain bearing coated paper;

s3, aluminum plating

Plating aluminum on the surface of the aluminum plating bearing layer bearing the coated paper, and forming an aluminum plating layer on the aluminum plating bearing layer to obtain the aluminum plating coated paper;

s4: coating water paint

Coating a water-based paint on the aluminized layer surface of the aluminized coated paper prepared in the S3 by using a coating machine, forming a printable protective layer on the aluminized layer, and drying to prepare printable coated paper;

s5: moisture regain ironing

Steam dampening and ironing the copperplate paper suitable for printing to prepare composite copperplate paper;

s6: bonding

And gluing the back of the composite coated paper, compounding the paper with base paper, drying and cooling to obtain the film-free metal type packaging paper.

8. The method according to claim 7, wherein in S4, a printable protective layer is formed on the aluminized layer, and after drying, the printable coated paper is steam-conditioned and ironed to obtain a composite coated paper.

9. The method according to claim 8, wherein the moisture content of the remoistened and ironed composite coated paper is 7% ± 0.5%.

Background

The colorful glittering card paper widely used in entertainment places, advertising industries, hotels and handicraft industries has a visual effect formed by reflection and refraction of light due to the fact that a 200-400A aluminum molecular layer is plated between a color layer and paper.

The surface of the traditional gold and silver card paper is usually provided with a PET film, so that the environmental pollution is easily caused after the paper is discarded, and the film needs to be removed during recycling and reconstruction.

Therefore, the gold-silver card paper is prepared by a transfer method, and the aluminum-plated layer is plated on the paper surface through the transfer film, so that a PET film does not need to be attached to the surface of the gold-silver card paper, paper can be directly recycled, and the preparation process comprises the following steps: (1) manufacturing a transfer film: coating a release mold pressing coating on the plastic film to form a transfer film; (2) aluminum plating: plating an aluminum layer on the transfer film; (3) attaching and transferring: the coiled transfer film plated with the aluminum layer is placed on an unreeling device, the transfer film is attached to a printing stock (such as paper) coated with an adhesive in advance when passing through an attaching device, the aluminum layer of the transfer film is bonded with the adhesive, the adhesive is solidified, then the plastic film is peeled off by a peeling device, and the peeled plastic film is rolled by a rolling device, so that the aluminum layer is transferred to the printing stock, and the transfer aluminized paper is obtained.

However, the gold and silver cardboard produced by the conventional transfer method is hard in surface texture and easy to crack in the actual use process.

Disclosure of Invention

The invention provides a film-free metal type packaging paper and a preparation method thereof, aiming at improving the crack resistance of gold and silver card paper.

In a first aspect, the application provides a film-free metal type wrapping paper, which adopts the following technical scheme:

a kind of filmless metal type wrapping paper, from top to bottom include the base paper ply, tie coat, waterproof copper plate paper ply, aluminize the coating of the bearing layer, aluminize the layer, suitable for printing the protective layer sequentially;

the aluminized bearing layer coating is prepared from the following raw materials in parts by weight: 50-60 parts of acrylic emulsion, 16-20 parts of acrylic resin, 1-2 parts of plasticizer, 1-3 parts of ammonia water and 25-30 parts of solvent.

By adopting the technical scheme, the base material formed by the acrylic emulsion and the acrylic resin can be used as a better aluminized bearing coating, ammonia water is further added to adjust the pH value of the acrylic emulsion, and meanwhile, the acrylic coating still has good toughness after being cured, so that the packaging paper is not easy to crack, and the crack resistance of the packaging paper is improved;

the ductility and flexibility of the acrylic emulsion and the acrylic resin can be improved by adding the plasticizer in the formula, so that the coating keeps certain flexibility after being cured, the wrapping paper is not easy to crack, and the crack resistance of the wrapping paper is improved.

Preferably, the solvent is prepared from absolute ethyl alcohol, water, ethyl acetate and butyl acetate according to the ratio of (1-2): (1-1.5): (1-1.5): (0.8-1) in weight ratio.

By adopting the technical scheme and adopting the combined solvent of absolute ethyl alcohol, water, ethyl acetate and butyl acetate, the raw materials in the formula have better compatibility.

Preferably, the solvent is prepared from absolute ethyl alcohol, water, ethyl acetate and butyl acetate according to the ratio of 1: 1: 1: 0.8 in weight ratio.

By adopting the technical scheme and adopting the combined solvent of absolute ethyl alcohol, water, ethyl acetate and butyl acetate, the raw materials in the formula have better compatibility.

Preferably, the plasticizer is one or a combination of more of dimethyl phthalate, diethyl phthalate and dioctyl phthalate.

Preferably, 5-8 parts of glycerol triglycidyl ether is also included.

By adopting the technical scheme, the glycerol triglycidyl ether can be used as a diluent, on one hand, the glycerol triglycidyl ether can act with a base material formed by the acrylic emulsion and the acrylic resin to improve certain flame retardance, so that the heat resistance is improved, and meanwhile, the glycerol triglycidyl ether also has the effects of viscosity reduction, leveling and toughening, so that the acrylic coating still has good toughness after being cured, the wrapping paper is not easy to crack, and the crack resistance of the wrapping paper is improved.

Preferably, the thickness of the aluminum plating layer is

In a second aspect, the application provides a method for preparing a film-free metal type wrapping paper, which adopts the following technical scheme: a preparation method of film-free metal type packing paper comprises the following steps:

s1, preparing aluminum-plated bearing layer paint

Uniformly mixing acrylic emulsion, acrylic resin, a solvent, a plasticizer, ammonia water and glycerol triglycidyl ether according to a ratio to obtain an aluminized bearing layer coating;

s2 coating aluminum-plated bearing layer paint

Coating an aluminized bearing coating on the surface of the waterproof coated paper, forming an aluminized bearing layer on the waterproof coated paper, and drying and rolling to obtain bearing coated paper;

s3, aluminum plating

Plating aluminum on the surface of the aluminum plating bearing layer bearing the coated paper, and forming an aluminum plating layer on the aluminum plating bearing layer to obtain the aluminum plating coated paper;

s4: coating water paint

Coating a water-based paint on the aluminized layer surface of the aluminized coated paper prepared in the S3 by using a coating machine, forming a printable protective layer on the aluminized layer, and drying to prepare printable coated paper;

s5: moisture regain ironing

Steam dampening and ironing the copperplate paper suitable for printing to prepare composite copperplate paper;

s6: bonding

And gluing the back of the composite coated paper, compounding the paper with base paper, drying and cooling to obtain the film-free metal type packaging paper.

By adopting the technical scheme, the method has the advantages of simple process and convenient operation, and can realize the quantitative production of the film-free metal type packaging paper.

Preferably, in S4, a printable protective layer is formed on the aluminized layer, and after drying, the printable coated paper is steam-remoistened and ironed to obtain the composite coated paper.

Preferably, the moisture content of the moisture-regained and ironed composite coated paper is 7% +/-0.5%.

By adopting the technical scheme, the water content is controlled, so that the film-free metal type packaging paper has certain toughness while the strength is ensured, and the crack resistance of the packaging paper is improved.

In summary, the present application has the following beneficial effects:

1. the base material formed by the acrylic emulsion and the acrylic resin can be used as a better aluminized bearing coating, ammonia water is further added to adjust the pH value of the acrylic emulsion, and meanwhile, the acrylic coating still has good toughness after being cured, so that the packaging paper is not easy to crack, and the crack resistance of the packaging paper is improved.

2. According to the application, the ductility and flexibility of the acrylic emulsion and the acrylic resin can be improved by adding the plasticizer in the formula, so that the coating keeps certain flexibility after being cured, the wrapping paper is not easy to crack, and the crack resistance of the wrapping paper is improved.

3. The glycerol triglycidyl ether can be used as a diluent, on one hand, the glycerol triglycidyl ether can act with a base material formed by acrylic emulsion and acrylic resin to improve certain flame retardance, so that the heat resistance is improved, and meanwhile, the glycerol triglycidyl ether also has the effects of viscosity reduction, leveling and toughening, so that the acrylic coating still has good toughness after being cured, the packaging paper is not easy to crack, and the crack resistance of the packaging paper is improved.

Detailed Description

The raw materials used in the preparation examples and examples are commercially available. Wherein:

acrylic emulsion was purchased from chemical Limited, Waverrucke, Beijing under the designation HWG 21548;

the acrylic resin is purchased from Baiyi, and the mark is acrylic resin AR-626W;

ammonia was purchased from Junxin under the designation cx 185.

Preparation example of aluminum plating bearing layer coating

Preparation examples 1 to 18

As shown in Table 1, the main differences between the preparation examples 1 to 18 are that the raw materials are mixed in different proportions,

hereinafter, the following description will be made by taking preparation example 1 as an example, wherein the plasticizer is dioctyl phthalate, and the unit of the addition amount of each raw material is kg. In addition, the plasticizer in preparation example 6 was dimethyl phthalate.

The preparation method of the aluminized bearing layer coating provided in preparation example 1 comprises the following steps: and uniformly mixing the acrylic emulsion, the acrylic resin, the solvent, diethyl phthalate and ammonia water according to the proportion to obtain the aluminized bearing layer coating.

Table 1 raw material composition and proportioning table

Examples

Example 1

A non-film metal type packing paper comprises a base paper layer, a bonding layer, a waterproof copper plate paper layer, an aluminized bearing layer coating, an aluminized layer and a printable protective layer from top to bottom in sequence.

The preparation method of the filmless metal-type wrapping paper provided in example 1 is as follows:

s1, preparing aluminum-plated bearing layer paint

Taking the aluminum-plated bearing layer coating prepared in the preparation example 1;

s2 coating aluminum-plated bearing layer paint

Coating an aluminized bearing coating on the surface of the waterproof coated paper by using a coating machine, forming an aluminized bearing layer on the waterproof coated paper, and drying and rolling to obtain bearing coated paper;

the coating speed of the coating machine is 140 m/min; the oven temperature of the coating machine is 120 ℃, and the drying time is 4 hours; the rolling cooling temperature of the coating machine is 14 ℃;

s3, aluminum plating

Aluminizing the surface of the aluminized bearing layer bearing the coated paper by using a vacuum aluminizing machine to form an aluminized layer on the aluminized bearing layer, so as to prepare the aluminized coated paper; the vacuum degree of the vacuum aluminum plating machine is 5 multiplied by 10^-4pa, the thickness of the aluminum plating layer is

S4: coating water paint

Coating acrylic emulsion on the surface of an aluminized layer of the aluminized coated paper by using a coating machine, forming a printable protective layer on the aluminized layer, and drying to obtain printable coated paper;

the coating speed of the coating machine is 150m/min, the oven temperature of the coating machine is 120 ℃, and the drying time is 3 h;

s5: moisture regain ironing

Performing steam moisture regain and ironing on the composite coated paper by using a moisture regain ironing machine, controlling the water content of the printable coated paper to be 7 +/-0.5%, and controlling the warping per square meter to be less than 1mm to prepare the composite coated paper;

s6: bonding

Gluing the back of the composite coated paper prepared in the step S5 by using a wet compounding machine, compounding the paper with base paper, drying and cooling to obtain film-free metal type packaging paper;

the compounding speed of the wet compounding machine is 110 m/min; the drying oven temperature of the wet compound machine is 110 ℃, and the drying time is 4 h; the cooling temperature of the wet compounding machine was 20 ℃.

Example 2

Example 2 differs from example 1 in that the aluminum plating bearer coating prepared in preparation example 2 was used.

Example 3

Example 3 differs from example 1 in that the aluminum plating bearer coating prepared in preparation example 3 was used.

Example 4

Example 4 differs from example 1 in that the aluminum plating bearer coating prepared in preparation example 4 was used.

Example 5

Example 5 differs from example 1 in that the aluminum plating bearer coating prepared in preparation example 5 was used.

Example 6

Example 6 differs from example 1 in that the aluminized carrier coating prepared in preparation example 6 was used.

Example 7

Example 7 differs from example 1 in that the aluminum plating bearer coating prepared in preparation example 7 was used.

Example 8

Example 8 differs from example 1 in that the aluminum plating bearer coating prepared in preparation example 8 was used.

Example 9

Example 9 differs from example 1 in that the aluminum plating bearer coating prepared in preparation example 9 was used.

Example 10

Example 10 differs from example 1 in that the aluminum plating bearer coating prepared in preparation example 10 was used.

Example 11

Example 11 differs from example 1 in that the aluminum plating bearer coating prepared in preparation example 11 was used.

Example 12

Example 12 differs from example 1 in that the aluminum plating bearer coating prepared in preparation example 12 was used.

Example 13

Example 13 differs from example 1 in that the aluminum plating bearer coating prepared in preparation example 13 was used.

Example 14

Example 14 differs from example 1 in that the aluminum plating bearer coating prepared in preparation example 14 was used.

Example 15

Example 15 differs from example 1 in that the aluminized carrier coating prepared in preparation example 15 was used.

Example 16

Example 16 differs from example 1 in that the aluminum plating resist coating prepared in preparation example 16 was used.

Comparative example

Comparative example 1

The difference from example 1 is that, in S3, aluminum plating is performed by transfer evaporation, which is different from the preparation method.

Comparative example 2

The difference from example 1 is that the aluminum plating carrier coating prepared in preparation example 17 was used.

Comparative example 3

The difference from example 1 is that the aluminum plating carrier coating prepared in preparation example 18 was used.

Performance test

Resistance to cracking

Refer to BB/T0054-2010 packaging industry Standard of the people's republic of China: the tests were carried out according to the method in vacuum aluminized paper 5.4.6, characterized by the crack resistance index (transverse direction), in units: mN. m²The results of the measurements are shown in Table 2.

Second, heat resistance

Refer to BB/T0054-2010 packaging industry Standard of the people's republic of China: the tests were carried out by the method in vacuum aluminized paper 5.4.11, characterized by the heat resistance temperature, unit: the detection results are shown in Table 2.

TABLE 2 table of Performance test results

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.