阅读说明：本技术 一种耐刮耐折转移膜、生产工艺及其应用 (Scratch-resistant and folding-resistant transfer film, production process and application thereof ) 是由 张恒 于 2020-07-30 设计创作，主要内容包括：本发明涉及转移膜技术领域,具体涉及一种耐刮耐折转移膜、生产工艺及其应用。该耐刮耐折转移膜,包括PET基膜以及涂布在PET基膜上的转移涂层,转移涂层涂料由丙烯酸酯类共聚物、聚酯树脂、聚氨酯树脂、聚二甲基硅氧烷、羟乙基纤维素、聚丙烯、乙醇和水组成,其中,丙烯酸酯类共聚物能够提高转移涂层的耐刮性能；聚氨酯树脂能够提高转移涂层的拉伸性能,从而提高转移涂层的耐折性能；丙烯酸酯类共聚物和聚氨酯树脂的协同作用,使得转移涂层具有高成膜性以及抗拉伸性能,通过转移胶水将转移膜与包装纸贴合后,剥离PET基膜,在包装纸弯折的过程中,具有耐刮耐折特性的转移涂层不会出现裂纹,因此,不会露出包装纸。(The invention relates to the technical field of transfer films, in particular to a scratch-resistant and folding-resistant transfer film, a production process and application thereof. The scratch-resistant and folding-resistant transfer film comprises a PET (polyethylene terephthalate) base film and a transfer coating coated on the PET base film, wherein the transfer coating is composed of acrylate copolymer, polyester resin, polyurethane resin, polydimethylsiloxane, hydroxyethyl cellulose, polypropylene, ethanol and water, and the scratch resistance of the transfer coating can be improved by the acrylate copolymer; the polyurethane resin can improve the tensile property of the transfer coating, so that the folding resistance of the transfer coating is improved; the transfer coating has high film-forming property and tensile resistance due to the synergistic effect of the acrylate copolymer and the polyurethane resin, the PET base film is peeled off after the transfer film is attached to the packaging paper through the transfer glue, and the transfer coating with the scratch-resistant and folding-resistant characteristics cannot crack in the bending process of the packaging paper, so that the packaging paper cannot be exposed.)

1. A scratch-resistant and fold-resistant transfer film is characterized in that: the transfer coating comprises a PET base film and a transfer coating coated on the PET base film, wherein the transfer coating comprises the following components in percentage by weight:

2. the scratch resistant, fold resistant transfer film of claim 1, wherein: the scratch-resistant and folding-resistant transfer film also comprises a laser information layer which is molded on the transfer coating.

3. The scratch resistant, fold resistant transfer film of claim 2, wherein: the scratch-resistant and folding-resistant transfer film further comprises an aluminum-plated layer on the laser information layer.

4. A process for producing a scratch-resistant and folding-resistant transfer film according to any one of claims 1 to 3, characterized in that: it comprises the following steps:

first step, preparation of transfer coating paint

Step one, preparing a coating A: respectively weighing the acrylate copolymer and the polyester resin according to the formula ratio, and uniformly mixing to obtain a coating A;

step two, preparing a coating B: adding ethanol and water in a formula amount into the coating A prepared in the step one, and uniformly stirring to obtain a coating B;

step three, preparing a coating C: adding the polyurethane resin with the formula amount into the coating B prepared in the step two, and uniformly stirring to obtain a coating C;

step four, preparing the transfer coating paint: sequentially adding polydimethylsiloxane, hydroxyethyl cellulose and polypropylene in formula amounts into the coating C prepared in the third step, and uniformly stirring to obtain the transfer coating;

second step, preparing scratch-resistant and folding-resistant transfer film

And (3) printing the transfer coating prepared in the first step on the PET base film by adopting the PET base film in a gravure printing mode, and drying to obtain the scratch-resistant and folding-resistant transfer film.

5. The process for producing a scratch-resistant and fold-resistant transfer film according to claim 4, wherein: in the second step, the stirring speed is 2500-3500 rpm/min, and the stirring time is 0.5-1.5 h.

6. The process for producing a scratch-resistant and fold-resistant transfer film according to claim 4, wherein: in the third step and the fourth step, the stirring speed is 2500-3500 rpm/min, and the stirring time is 0.5-1 h.

7. The process for producing a scratch-resistant and fold-resistant transfer film according to claim 4, wherein: in the second step, the gravure wet coating amount is 8.3-9.5 gsm, the printing speed is 95-100 m/min, and the drying efficiency is 90-95%.

8. The process for producing a scratch-resistant and fold-resistant transfer film according to claim 4, wherein: the environment humidity of the scratch-resistant and folding-resistant transfer film in the whole production process is 45-65%, and the temperature is 19-25 ℃.

9. Use of a scratch-resistant, fold-resistant transfer film according to any of claims 1 to 3, characterized in that: and (3) adhering the scratch-resistant and folding-resistant transfer film and the packaging paper through a transfer glue wet method, and then peeling off the PET base film to obtain the packaging paper with the scratch-resistant and folding-resistant transfer coating.

Technical Field

The invention relates to the technical field of transfer films, in particular to a scratch-resistant and folding-resistant transfer film, a production process and application thereof.

Background

With the improvement of living standard, people have higher and higher requirements on product packaging, and in order to improve and beautify the visual effect of packaging, a transfer film is often compounded on the surface of packaging paper. The transfer film comprises a PET base film and a coating layer, and the PET base film is difficult to naturally degrade and can cause white pollution. With the higher environmental protection requirement of China, the plasticization removal of the packaging paper is urgent, and the plasticization removal requirement is achieved by adopting a method for removing a PET (polyethylene terephthalate) base film on the surface of the packaging paper at present. But because the PET base film plays resistant effect of buckling on the surface of the wrapping paper, after the PET base film is removed, the transfer coating can not meet the requirement of buckling of the wrapping paper.

Disclosure of Invention

One of the purposes of the invention is to provide a scratch-resistant and folding-resistant transfer film which has the advantages of high film forming property and tensile resistance aiming at the defects of the prior art.

The second purpose of the invention is to provide a production process of the scratch-resistant and folding-resistant transfer film, aiming at the defects of the prior art, and the production process has the advantages of simplicity and easy operation.

The invention also aims to provide the application of the scratch-resistant and folding-resistant transfer film aiming at the defects of the prior art, and the transfer film is compounded on the surface of the packaging paper and is not cracked.

In order to achieve one of the purposes, the invention adopts the following technical scheme:

the scratch-resistant and folding-resistant transfer film comprises a PET (polyethylene terephthalate) base film and a transfer coating coated on the PET base film, wherein the transfer coating consists of the following components in percentage by weight:

in the technical scheme, the scratch-resistant and folding-resistant transfer film further comprises a laser information layer which is molded on the transfer coating.

In the technical scheme, the scratch-resistant and folding-resistant transfer film further comprises an aluminum plating layer on the laser information layer.

In order to achieve the second purpose, the invention adopts the following technical scheme:

the production process of the scratch-resistant and folding-resistant transfer film comprises the following steps:

first step, preparation of transfer coating paint

Step one, preparing a coating A: respectively weighing the acrylate copolymer and the polyester resin according to the formula ratio, and uniformly mixing to obtain a coating A;

step two, preparing a coating B: adding ethanol and water in a formula amount into the coating A prepared in the step one, and uniformly stirring to obtain a coating B;

step three, preparing a coating C: adding the polyurethane resin with the formula amount into the coating B prepared in the step two, and uniformly stirring to obtain a coating C;

step four, preparing the transfer coating paint: sequentially adding polydimethylsiloxane, hydroxyethyl cellulose and polypropylene in formula amounts into the coating C prepared in the third step, and uniformly stirring to obtain the transfer coating;

second step, preparing scratch-resistant and folding-resistant transfer film

And (3) printing the transfer coating prepared in the first step on the PET base film by adopting the PET base film in a gravure printing mode, and drying to obtain the scratch-resistant and folding-resistant transfer film.

In the technical scheme, in the second step, the stirring speed is 2500-3500 rpm/min, and the stirring time is 0.5-1.5 h.

In the technical scheme, in the third step and the fourth step, the stirring speed is 2500-3500 rpm/min, and the stirring time is 0.5-1 h.

In the technical scheme, in the second step, the wet coating amount of the gravure is 8.3-9.5 gsm, the printing speed is 95-100 m/min, and the drying efficiency is 90-95%.

In the technical scheme, the environment humidity is 45-65% and the temperature is 19-25 ℃ in the whole production process of the scratch-resistant and folding-resistant transfer film.

In order to achieve the third purpose, the invention adopts the following technical scheme:

the scratch-resistant and folding-resistant transfer film is attached to packaging paper through transfer glue in a wet mode, and then a PET (polyethylene terephthalate) base film is peeled off, so that the packaging paper with the scratch-resistant and folding-resistant transfer coating is obtained.

The invention has the beneficial effects that:

(1) the scratch-resistant folding-resistant transfer film comprises a PET (polyethylene terephthalate) base film and a transfer coating coated on the PET base film, wherein the transfer coating is composed of acrylate copolymer, polyester resin, polyurethane resin, polydimethylsiloxane, hydroxyethyl cellulose, polypropylene, ethanol and water, and the scratch resistance of the transfer coating can be improved by the acrylate copolymer; the polyurethane resin can improve the tensile property of the transfer coating, so that the folding resistance of the transfer coating is improved; the transfer coating has high film-forming property and tensile resistance due to the synergistic effect of the acrylate copolymer and the polyurethane resin, the PET base film is peeled off after the transfer film is attached to the packaging paper through the transfer glue, and the transfer coating with the scratch-resistant and folding-resistant characteristics can not crack in the bending process of the packaging paper, namely the packaging paper can not be exposed. Moreover, the peeled PET base film can be recycled for continuous use, and white pollution can be reduced.

(2) The environment humidity in the whole production process of the scratch-resistant and folding-resistant transfer film is 45-65%, and the temperature is 19-25 ℃. The viscosity of the transfer coating becomes high when the environmental temperature is lower than 19 ℃, and the leveling performance of the transfer coating is influenced; an ambient temperature above 25 ℃ can result in too rapid solvent evaporation, which can result in too high a solids content of the transfer coating, which is detrimental to uniform application of the transfer coating. The environmental humidity is lower than 45%, so that the static electricity of the batching environment is increased, and the cleanliness of the transfer coating and the batching environment safety are reduced; the environmental humidity is higher than 65%, and the solvent can absorb moisture in the air, so that the coating is fogged, and the coating of the transfer coating is not facilitated.

(3) The gravure wet coating amount of the transfer coating of the scratch-resistant folding-resistant transfer film is 8.3-9.5 gsm. The wet coating amount is less than 8.3gsm, the transfer coating is too thin, the folding resistance of the transfer coating can be greatly reduced, and cracks are easy to appear on the transfer coating in the bending process of the packaging paper and expose out of the packaging paper; wet coats above 9.5gsm, too thick a transfer coat, not only wastes raw materials and increases costs, but also reduces the drying efficiency of the coat, causing blistering of the transfer coat, and also reducing the fold resistance of the transfer coat.

(4) The drying efficiency of the transfer coating of the scratch-resistant and folding-resistant transfer film is 90% -95%, the drying efficiency is higher than 90%, the transfer coating cannot be completely dried, and the transfer coating is easy to whiten during vacuum aluminum plating, so that the coating quality of the transfer coating is influenced; drying efficiency is higher than 95%, can make transfer coating and PET base film's laminating degree too high, influences peeling off of PET base film.

Drawings

FIG. 1 is a diagram illustrating the effect of bending the transfer coating layer after being combined with 350g of grey white cardboard in example 1 of the present invention.

FIG. 2 is a graph showing the effect of bending the transfer coating of comparative example 1 of the present invention after being combined with 350g of gray white cardboard.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.