A kind of preparation method of polymer composite film

A composite film and polymer technology, used in biocide-containing paints, powder coatings, coatings, etc., can solve problems such as damage to paint adhesion, poor thermal stability, poor chemical resistance, etc., and achieve rich film types and functions. , Widen the selection range of raw materials, and the effect of good dimensional stability of products

Active Publication Date: 2021-03-02
FOSHAN YIKEJU NEW MATERIAL CO LTD
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  • Description
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AI Technical Summary

Problems solved by technology

[0003] For multi-layer multifunctional composite films, the traditional preparation methods include: 1. Laminate the thermoplastic films that have been manufactured, and bond the layers with adhesives. 2. Adopt multi-layer co-extrusion molding, which is currently industrialized. The maximum 7-layer thermoplastic co-extrusion molding, thermoplastic multi-functional composite film has low surface hardness, poor thermal stability of size, large shrinkage rate, poor wear resistance, low strength, poor weather resistance, poor chemical resistance and other shortcomings
At the same time, the investment in these factories is huge, often hundreds of millions of RMB
[0004] On the other hand, paint strippable film-making technology is to coat high-temperature resistant materials such as glass, vitrified polished tiles, aluminum sheets, and iron sheets for multiple times, and it needs to peel off the cured paint film to form a film without damage. Industrial application is facing great challenges. At present, the main research and development direction in the coatings industry is to improve the adhesion of coatings on the substrate. Destroying the adhesion of coatings on the substrate and peeling off the substrate is an industry problem. Many use adhesion The peelable protective coating formed by poor water-based coatings also needs to be removed in heated alkaline water. In terms of solvent-based liquid coatings, most of them use acid-base or organic solvents to dissolve the paint film for peeling, and the paint film is damaged at the same time; In the powder coating industry, most of the paint film is removed by burning or soaking in strong solvents
[0005] The commonly used method of spraying release agent on plastic molds to achieve peeling is very small in practicality in this technical solution. Since the thickness of injection molded parts is several orders of magnitude thicker than that of film, the leveling of release agent has limited influence on the surface of injection molded parts. , but the current technology is limited, the leveling of solvent-free environmentally friendly coatings is difficult to achieve mirror effect without grinding and polishing, so it is necessary to use the flatness and smoothness of the substrate surface to achieve the specular highlight effect of the organic polymer composite film, if Spraying a release agent on a high-gloss substrate, the leveling and high-temperature volatilization of the release agent will seriously affect the high-gloss mirror effect of the film, and the release agent attached to the surface of the composite film will seriously affect the performance of the film. Therefore, for the application range The widest high-gloss composite film requires the use of environmentally friendly peeling technology that does not use mold release agents, organic solvents, or acids and bases

Method used

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  • A kind of preparation method of polymer composite film
  • A kind of preparation method of polymer composite film
  • A kind of preparation method of polymer composite film

Examples

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preparation example Construction

[0059] Traditional film production uses thermoplastics through blow molding, calendering, casting, multi-layer co-extrusion and other methods, but the present invention uses thermosetting coating materials and construction principles to make single-layer or multi-layer high-quality films with different functions. The molecular composite film is then peeled off from the substrate, with small equipment investment, flexible production organization, rich film types and functions, and personalized customization. The number of composite layers is not limited by the equipment, and the thickness can be adjusted flexibly; due to the wide variety of coatings, coating various functional coatings can realize more functions of the composite film. Specifically, such as figure 1 Shown, the preparation method of polymer composite film of the present invention comprises:

[0060] S101. Clean and dry the surface of the substrate.

[0061] The material of the substrate is glass, ceramics, meta...

Embodiment 1

[0138] Example 1: Three-layer composite decorative film with high gloss and high hardness mirror surface

[0139] 1) Selection of base material: choose a piece of ordinary white glass of 400*600*5mm, first wash the surface with clean water and dry it at 120°C for 5 minutes;

[0140] 2) Antifouling protection is carried out on one side of the cleaned and dried substrate, which is the back side;

[0141] 3) The UV radiation-cured transparent coating is applied by roller coating, such as EBECRY1600 of Allnex Company, to the front of the substrate with a paint film thickness of 8 μm, and then cured by UV radiation to form a UV radiation-cured coating;

[0142] 4) Using electrostatic powder spraying equipment, two-component polyester powder coatings, such as SJ-4G and SJ-4H produced by Anhui Shenjian Company, are made with TGIC as the curing agent (the amount of curing agent added is 1-20%) The powder coating is sprayed on the ultraviolet radiation cured coating that completed ste...

Embodiment 2

[0151] Example 2: High-gloss mirror surface double-layer composite metal effect decorative film

[0152] 1) Selection of base material: choose a piece of ordinary white glass of 400*600*5mm, first wash the surface with clean water and dry it at 120°C for 5 minutes;

[0153] 2) Antifouling protection is carried out on one side of the cleaned and dried substrate, which is the back side;

[0154] 3) Using electrostatic powder spraying equipment, two-component polyester powder coatings, such as SJ-4G and SJ-4H produced by Anhui Shenjian Company, supplemented with TGIC as a curing agent (the amount of curing agent added is 1-20%), And mix 1-10% aluminum powder and 1-10% pearl powder to make powder coating, spray on the front of the glass, and bake in an oven at 160 ° C for 15 minutes to form a layer of metal with a thickness of 40 μm Silver effect coating;

[0155] 4) the workpiece that completes step 4) is cooled to room temperature;

[0156] 5) Using electrostatic powder spray...

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Abstract

The invention discloses a preparation method of a polymer composite film, comprising: (1) cleaning and drying the surface of a base material; (2) performing antifouling protection on one side of the base material; (3) cleaning the base material Spraying or coating thermosetting paint on the front; (4) curing the substrate to form a film; (5) printing the pattern on the film on the front of the substrate to form a decorative pattern; (6) removing the antifouling protective material and cleaning (7) leave the film for a preset time, and then peel off the film with the decorative pattern from the surface of the substrate; (8) protect the front side of the film and make it into a roll. In the present invention, single-layer or multi-layer composite films are prepared by using the paint strippable film-making technology. The method is simple, and the preparation cost of the composite film is greatly reduced. Moreover, the stripping process is simple, and no release agent, organic solvent and acid-base solution are used. The surface can achieve a specular highlight effect.

Description

technical field [0001] The invention relates to the technical field of film processing, in particular to a preparation method of a polymer composite film. Background technique [0002] Films made of polyvinyl chloride, polyethylene, polypropylene, polystyrene, and other resins used in packaging and as laminations. Plastic packaging and plastic packaging products are taking an increasing share in the market, especially composite plastic flexible packaging, which has been widely used in food, medicine, chemical and other fields. There are many methods for forming plastic films, such as calendering, casting, blow molding, and stretching. These production methods have the characteristics of high production efficiency and large output. [0003] For multi-layer multifunctional composite films, the traditional preparation methods include: 1. Laminate the thermoplastic films that have been manufactured, and bond the layers with adhesives. 2. Adopt multi-layer co-extrusion molding,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C09D5/03C09D5/20C09D5/16C09D167/00C09D175/04C09D127/12
CPCC09D5/03C09D5/1662C09D5/1668C09D5/20C09D127/12C09D167/00C09D175/04
Inventor 伍明
Owner FOSHAN YIKEJU NEW MATERIAL CO LTD
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