阅读说明：本技术 用于eva表面的印刷膜及印刷方法 (Printing film for EVA surface and printing method ) 是由 林亮 骆杰彬 于 2020-06-17 设计创作，主要内容包括：本发明涉及EVA基材表面印刷领域,具体涉及用于EVA表面的印刷膜及印刷方法,所述印刷膜从下往上依次包括底层、金膜层、有机涂层和表面漆层。所述的用于EVA表面的印刷膜的印刷方法,包括以下步骤：制备多孔支撑体,在多孔支撑体上喷涂底层；然后进行真空交叠镀膜处理；依次喷涂有机涂层和表面漆层；采用激光灼烧有机涂层和表面漆层,绘制出指定的图案；采用热转印的方式将印刷膜转印至EVA基材上。有机涂层和表面漆层经过激光灼烧后即可显现内部的金膜层,呈现金属图案,无需另外镀金；底层和金膜层采用高能粒子辐射形成径迹,之后将金膜层浸入化学腐蚀剂中,以形成微孔,使转印膜和鞋体具有良好的透气性。(The invention relates to the field of EVA (ethylene vinyl acetate) substrate surface printing, in particular to a printing film for an EVA surface and a printing method. The printing method of the printing film for the EVA surface comprises the following steps: preparing a porous support body, and spraying a bottom layer on the porous support body; then carrying out vacuum overlapping coating treatment; sequentially spraying an organic coating and a surface paint layer; firing the organic coating and the surface paint layer by laser to draw a specified pattern; and transferring the printing film to the EVA substrate by adopting a thermal transfer printing mode. The organic coating and the surface paint layer can show the internal gold film layer after laser firing, show a metal pattern and do not need to be additionally plated with gold; the bottom layer and the gold film layer are irradiated by high-energy particles to form tracks, and then the gold film layer is immersed in a chemical corrosive agent to form micropores, so that the transfer printing film and the shoe body have good air permeability.)

1. A printing film for EVA surface, its characterized in that: the printing film sequentially comprises a bottom layer, a gold film layer, an organic coating and a surface paint layer from bottom to top.

2. The printing film and the printing method for the EVA surface according to claim 1, wherein the printing film comprises: the material of the bonding bottom layer is polycarbonate, and the thickness is 5-6 mu m.

3. The printing film and the printing method for the EVA surface according to claim 1, wherein the printing film comprises: the gold film layer is made of copper films and copper-chromium alloy films which are alternately compounded, and the thickness of the gold film layer is 4-5 mu m.

4. The printing film and the printing method for the EVA surface according to claim 1, wherein the printing film comprises: the organic coating is made of UV paint with the thickness of 4-5 um.

5. The printing film and the printing method for the EVA surface according to claim 1, wherein the printing film comprises: the surface paint layer is made of water-based polyurethane paint and has the thickness of 2-3 um.

6. The printing process of a printing film for EVA surfaces according to any of claims 1 to 5, characterised in that it comprises the following steps:

step a: preparing a porous support, spraying a bottom layer on the porous support, wherein the bottom layer receives high-energy particle radiation vertical to the surface of the porous support, forming a track on the surface of the bottom layer under the ion radiation, then immersing the bottom layer into a chemical corrosive, and treating for 15-20min at 50-60 ℃ to form a pore of 0.02-0.05um on the surface of the bottom layer;

step b: performing plasma glow treatment on the bottom layer in a vacuum environment, performing vacuum overlapping coating treatment, receiving high-energy particle radiation vertical to the surface of the bottom layer, forming a track on the surface of the gold film layer under the ion radiation, immersing the gold film layer into a chemical corrosive agent, and treating for 30-40min at 80-90 ℃ to form a pore of 0.02-0.05um on the surface of the bottom layer;

step c: sequentially spraying an organic coating and a surface paint layer;

step d: firing the organic coating and the surface paint layer by laser to draw a specified pattern, wherein the gold film layer is exposed on the part of the pattern;

step e: removing the multi-layer compounded printing film from the porous support body;

step f: and transferring the printing film to the EVA substrate by adopting a thermal transfer printing mode.

7. The printing method of a printing film for EVA surfaces according to claim 5, characterised in that: the porous support is tubular.

8. The printing method of a printing film for EVA surfaces according to claim 1, characterised in that: the preparation method of the porous support body comprises the following steps: the ceramic powder was shaped by isostatic pressing and sintered at 1100 ℃.

9. The printing method of a printing film for EVA surfaces according to claim 1, characterised in that: the vacuum overlapping coating treatment comprises the following steps: the vacuum overlapping coating process comprises the following steps: firstly, a copper target is adopted, a copper film is sputtered on the surface of the bottom layer, the power of the target is 16-20A, the argon flow is 220-250SCCM, and the sputtering time of the layer is 5 min; when the copper sputtering time is carried out for 4min, the original copper target current is not immediately closed and is reduced to 8A, meanwhile, the electric arc copper-chromium alloy target is started, the copper-chromium target current is gradually increased, when the current is greater than 8A, the copper target current is closed, the chromium-copper target current is gradually increased to 25A, argon is introduced into the copper target for 150-180SCCM, and the sputtering time of the layer is 4 min.

10. The printing method of a printing film for EVA surfaces according to claim 1, characterised in that: and c, leveling, drying and curing the organic coating and the surface paint layer when the organic coating and the surface paint layer are sprayed.

Technical Field

The invention relates to the field of EVA substrate surface printing, in particular to a printing film for an EVA surface and a printing method.

Background

In the fields of chemistry and organic chemical industry, EVA refers to an ethylene-vinyl acetate copolymer and a rubber-plastic foam material prepared from the ethylene-vinyl acetate copolymer, has a molecular formula of (C2H4) x. (C4H6O2) y, and is used for manufacturing refrigerator guide pipes, gas pipes, civil engineering plates, containers, daily necessities and the like. It is solid at normal temperature, and is heated to melt to some extent and become liquid with certain viscosity. The EVA rubber-plastic product is a novel environment-friendly plastic foaming material, has the advantages of good buffering, shock resistance, heat insulation, moisture resistance, chemical corrosion resistance, bacteria resistance, water resistance and the like, is nontoxic and does not absorb water, and is widely applied to the manufacture of slippers, sandals and the like. The traditional EVA surface printing mostly adopts a thermal transfer printing mode to print patterns on a base material, the colors and the shapes of the patterns are preset patterns on a transfer film, the shapes are single, and when the patterns cover a shoe surface in a large area, the air permeability is poor.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a printing film and a printing method for an EVA surface, so as to solve the problems in the background art.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a printing film for EVA surface, its characterized in that: the printing film sequentially comprises a bottom layer, a gold film layer, an organic coating and a surface paint layer from bottom to top.

Preferably, the material of the adhesive bottom layer is polycarbonate, and the thickness is 5-6 μm.

Preferably, the gold film layer is made of copper films and copper-chromium alloy films which are alternately compounded, and the thickness of the gold film layer is 4-5 mu m.

Preferably, the material of the organic coating is UV paint, and the thickness is 4-5 um.

Preferably, the material of surface paint layer is waterborne polyurethane paint, and thickness is 2-3 um.

The printing method of the printing film for the EVA surface is characterized by comprising the following steps of:

step a: preparing a porous support, spraying a bottom layer on the porous support, wherein the bottom layer receives high-energy particle radiation vertical to the surface of the porous support, forming a track on the surface of the bottom layer under the ion radiation, then immersing the bottom layer into a chemical corrosive, and treating for 15-20min at 50-60 ℃ to form a pore of 0.02-0.05um on the surface of the bottom layer;

step b: performing plasma glow treatment on the bottom layer in a vacuum environment, performing vacuum overlapping coating treatment, receiving high-energy particle radiation vertical to the surface of the bottom layer, forming a track on the surface of the gold film layer under the ion radiation, immersing the gold film layer into a chemical corrosive agent, and treating for 30-40min at 80-90 ℃ to form a pore of 0.02-0.05um on the surface of the bottom layer;

step c: sequentially spraying an organic coating and a surface paint layer;

step d: firing the organic coating and the surface paint layer by laser to draw a specified pattern, wherein the gold film layer is exposed on the part of the pattern;

step e: removing the multi-layer compounded printing film from the porous support body;

step f: and transferring the printing film to the EVA substrate by adopting a thermal transfer printing mode.

Preferably, the porous support is tubular.

Preferably, the preparation method of the porous support is as follows: the ceramic powder was shaped by isostatic pressing and sintered at 1100 ℃.

Preferably, the vacuum overlapping coating treatment comprises the following steps: the vacuum overlapping coating process comprises the following steps: firstly, a copper target is adopted, a copper film is sputtered on the surface of the bottom layer, the power of the target is 16-20A, the argon flow is 220-250SCCM, and the sputtering time of the layer is 5 min; when the copper sputtering time is carried out for 4min, the original copper target current is not immediately closed and is reduced to 8A, meanwhile, the electric arc copper-chromium alloy target is started, the copper-chromium target current is gradually increased, when the current is greater than 8A, the copper target current is closed, the chromium-copper target current is gradually increased to 25A, argon is introduced into the copper target for 150-180SCCM, and the sputtering time of the layer is 4 min.

Preferably, in the step c, the organic coating and the surface paint layer are applied by leveling, drying and curing.

From the above description, the printing film and the printing method for the EVA surface provided by the invention have the following beneficial effects: the printing film is made of a multi-layer composite material of a bottom layer, a gold film layer, an organic coating and a surface paint layer, the organic coating and the surface paint layer can show the internal gold film layer after laser firing, a metal pattern is presented, and gold plating is not needed; the bottom layer and the gold film layer are irradiated by high-energy particles to form tracks, and then the gold film layer is immersed in a chemical corrosive agent to form micropores, so that the transfer printing film and the shoe body have good air permeability.

Detailed Description

The invention is further described below by means of specific embodiments.

The printing film for the EVA surface comprises a bottom layer, a gold film layer, an organic coating and a surface paint layer from bottom to top in sequence, wherein the bottom layer is used for being compounded with an EVA base material, the gold film layer is used for presenting a metal pattern after the printing film is burned by laser, and the organic coating and the surface paint layer are used for providing a surface pattern and a color.

The bottom layer is made of polycarbonate, the thickness of the bottom layer is 5-6 microns, the gold film layer is made of a copper film and a copper-chromium alloy film which are alternately compounded, the thickness of the gold film layer is 4-5 microns, the organic coating layer is made of UV paint and is 4-5 microns, the surface paint layer is made of water-based polyurethane paint and is 2-3 microns, the water-based polyurethane paint takes water as a solvent, is harmless to a human body, does not pollute the environment, is plump in paint film, glittering and translucent, has good flexibility, and has the characteristics of water resistance, wear resistance, aging resistance, yellowing resistance, fast drying, convenience in use and the like.

A method of printing a printed film for an EVA surface comprising the steps of:

step a: preparing a porous support, spraying a bottom layer on the porous support, wherein the bottom layer receives high-energy particle radiation vertical to the surface of the porous support, forming a track on the surface of the bottom layer under the ion radiation, then immersing the bottom layer into a chemical corrosive (acid), and treating for 15-20min at 50-60 ℃ to form a pore of 0.02-0.05um on the surface of the bottom layer;

step b: performing plasma glow treatment on the bottom layer in a vacuum environment, performing vacuum overlapping coating treatment, receiving high-energy particle radiation vertical to the surface of the bottom layer, forming a track on the surface of the gold film layer under the ion radiation, immersing the gold film layer into a chemical corrosive agent, and treating for 30-40min at 80-90 ℃ to form a pore of 0.02-0.05um on the surface of the bottom layer;

step c: sequentially spraying an organic coating and a surface paint layer;

step d: firing the organic coating and the surface paint layer by laser to draw a specified pattern, wherein the gold film layer is exposed on the part of the pattern;

step e: cutting the printing film along the axial direction, and removing the multi-layer compounded printing film from the porous support body for later use;

step f: and transferring the printing film to the EVA substrate by adopting a thermal transfer printing mode.

The porous support body is tubular, the porous support body is used as a carrier for manufacturing the printing film, pores are distributed on the surface of the porous support body, and the preparation method of the porous support body comprises the following steps: the ceramic powder is subjected to isostatic pressing, sintering at 1100 ℃, coarse grinding, fine grinding and polishing by using abrasive paper, and the pore diameter of the porous support is 0.01-0.02um, so that the material of the bottom layer can form a continuous film on the porous support.

The vacuum overlapping coating treatment comprises the following steps: the vacuum overlapping coating process comprises the following steps: firstly, a copper target is adopted, a copper film is sputtered on the surface of the bottom layer, the power of the target is 16-20A, the argon flow is 220-250SCCM, and the sputtering time of the layer is 5 min; when the copper sputtering time is carried out for 4min, the original copper target current is not immediately closed and is reduced to 8A, meanwhile, the electric arc copper-chromium alloy target is started, the copper-chromium target current is gradually increased, when the current is greater than 8A, the copper target current is closed, the chromium-copper target current is gradually increased to 25A, argon is introduced into the copper target for 150-180SCCM, and the sputtering time of the layer is 4 min.

And c, leveling, drying and curing the organic coating and the surface paint layer when the organic coating and the surface paint layer are sprayed.

The printing film and the printing method for the EVA surface provided by the invention have the following beneficial effects: the printing film is made of a multi-layer composite material of a bottom layer, a gold film layer, an organic coating and a surface paint layer, the organic coating and the surface paint layer can show the internal gold film layer after laser firing, a metal pattern is presented, and gold plating is not needed; the bottom layer and the gold film layer are irradiated by high-energy particles to form tracks, and then the gold film layer is immersed in a chemical corrosive agent to form micropores, so that the transfer printing film and the shoe body have good air permeability.

The above description is only a few specific embodiments of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by the design concept should fall within the scope of the present invention.