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What is the classification and scope of application of protective film?

time:2021/2/26 10:24:37 browse:

What is the classification and scope of application of protective film? According to the scope of application, the protective film can be applied to the following areas: metal product surface, coated metal product surface, plastic product surface, automotive product surface, electronic product surface, label product surface, profile product surface and other product surfaces. . According to the classification of the base material, the protective film can be divided into PE base material, PVC base material, PET base material, OPP base material and so on. Let's discuss it in detail!

1. Classified by base material:

PE substrate, PVC substrate, PET substrate, OPP substrate, etc.

2. Classified by protective film market:

(1) Traditional protective film: such as galvanized steel protective film, color steel plate protective film, glass or plastic sheet protective film, etc. Most of these traditional protective films are low value-added applications with low performance and crystallinity requirements, and most of them are gelatinized protective films.

(2) Protective film for high-tech electronics industry: such as dry film or wafer grinding process. This kind of protective film usually needs to be produced in a clean room and has very strict requirements on crystal points. Only a few manufacturers have sufficient technical capabilities to meet these requirements.

(3) Flat panel display protective film: The application range includes flat panel displays, TFT-LCD modules, backlight modules, glass substrates and various optical components, such as polarizers, color filters, etc. Viscosity and crystallization point control, which is a high value-added and high-tech application.

3. According to the nature: adhesive film, self-adhesive film

(1) The self-adhesive film is usually produced by CO extrusion, and the self-adhesive layer is mainly EVA, ultra-low density polyethylene or polyolefin plastic resin. This structure has gradually become the mainstream of the market, because it has more advantages than adhesive films, such as no residual glue, providing stable adhesion, reducing user costs and creating higher profits for protective film manufacturers.

(2) There are solvent-based rubber adhesives, solvent-based acrylic adhesives, water-based acrylic adhesives and silicone adhesives. Among them, the water-based acrylic adhesive is the most widely used product, it can easily adjust the adhesive, and has good transparency and weather resistance.

4. Classified by chewing gum system:

(1) Rubber: natural rubber, styrene butadiene rubber, synthetic rubber.

(2) The characteristics of rubber protective film: soft, can quickly reach the final viscosity; good molecular fluidity; relatively easy to tear; natural rubber has poor aging resistance; high price.

(3) Acrylic series: emulsion type (water-based) and solvent type.

Features of acrylic adhesive protective film:

(1) Emulsion acrylic (water-based acrylic): The fluidity is relatively poor, and the final adhesion time is relatively long. The viscosity of the low-grade protective film will increase with the passage of time. The environmental protection material has good weather resistance and can be quickly torn Split movie;

(2) Solvent acrylic: It is difficult to meet the high requirements of environmental standards, and other characteristics are similar to emulsion acrylic.