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Adhesive protecting film

A technology of self-adhesive protective film and weight percentage, which is applied in the field of self-adhesive protective film, can solve the problems of easy transfer of adhesive resin, poor stability, low glass transition temperature, etc., achieves obvious toughening effect at low temperature, and is conducive to high-speed extrusion output, high thermal stability

Inactive Publication Date: 2006-08-02
海宁海欣真空包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polymers that make up the bonding layer mainly include polyisobutylene, polyacrylic acid and its esters, ethylene-vinyl acetate copolymer, polyurethane, elastomers, etc. Among them, polyisobutylene, polyacrylic acid and its esters, ethylene-vinyl acetate copolymer These materials are mainly used in aluminum-plastic panels, building decoration materials and security doors. These materials have a low glass transition temperature and low molecular weight. Therefore, after the protective film is torn off, the adhesive resin is often transferred and remains On the surface of the protective body, and organic solvents are used in the production process, which seriously pollutes the environment, affects the health of workers, and poses safety and fire hazards
[0004] The three-layer melt co-extruded blow molding protective film adopts green and environmental protection technology. There is almost no pollution in the whole production process, and it will not remain on the protected body after being torn off. This type of protective film is divided into high-temperature protective film and room temperature protective film. High temperature protective film can be pasted on the protected body at about 50°C, and room temperature protective film can be pasted on the protected body at room temperature. The adhesive strength of these two types of protective films will change with the temperature. The higher the temperature, the stronger the viscosity. At high temperature, it sticks very firmly. It is difficult to tear off. In serious cases, it cannot be torn off at all, which affects the normal use of the protected product. The lower the temperature, the weaker the viscosity. At low temperature, some or even the whole part will fall off. , the purpose of protecting the product cannot be achieved, and poor stability has become an important factor hindering the development of self-adhesive protective film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0031] The percentage by weight of each component in the self-adhesive protective film of this embodiment is: low-density polyethylene: 34%, linear low-density polyethylene: 26%, EVA: 10%, polyethylene elastomer: 22%, antistatic masterbatch: 4 %. Stabilizing additive: 4%. After the above-mentioned components are proportioned, they are heated and cast or blown to form a self-adhesive film, and after corona treatment, the surface is printed with advertisements and product introductions. The content of the polyethylene elastomer and the stabilizing agent in the formula of this ratio is relatively high, and it is suitable for the situation where the surface temperature of the board is between 0°C and 75°C. In this embodiment, in order to enhance the thermal stability of the self-adhesive protective film, the content of the stabilizing assistant can also be increased to 5%, or 6%, and the content of low-density polyethylene can be reduced accordingly.

[0032] Low-density polyethyl...

Embodiment approach 2

[0039] The percentage by weight of each component in the self-adhesive protective film of this embodiment is: low-density polyethylene: 28%, linear low-density polyethylene: 25%, EVA: 36%, polyethylene elastomer: 4%, antistatic masterbatch: 3 %. Stabilizing additive: 4%. After the above-mentioned components are proportioned, they are heated and cast or blown to form a self-adhesive film, and after corona treatment, the surface is printed with advertisements and product introductions. The formula of this ratio reduces the content of polyethylene elastomer and increases the content of EVA. It is suitable for the situation where the surface temperature of the board is between 35°C and 75°C. Because the surface temperature of the board used is relatively high, it is not suitable for self-adhesive protection. The viscosity requirement of the film is relatively low, the content of polyethylene elastomer can be reduced, and the content of other ingredients can be adjusted accordingly....

Embodiment approach 3

[0041]The percentage by weight of each component in the self-adhesive protective film of this embodiment is: low-density polyethylene: 31%, linear low-density polyethylene: 25.5%, EVA: 23%, polyethylene elastomer: 13%, antistatic masterbatch: 3.5% %. Stabilizing additive: 4%. After the above-mentioned components are proportioned, they are heated and cast or blown to form a self-adhesive film, and after corona treatment, the surface is printed with advertisements and product introductions. The content of the formula polyethylene elastomer in this proportion is between the first embodiment and the second embodiment, and the content of other substances is adjusted accordingly, so that the requirements for the thermal stability of the self-adhesive protective film are between the two The situation between, and the content of the stabilizing assistant can be appropriately adjusted to 2% or 6% as required, and the content of EVA can be adjusted at the same time.

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Abstract

The adhesive protecting film consists of low density polyethylene 28-34 wt%, linear low density polyethylene 25-26 wt%, EVA 10-38 wt%, polyethylene elastomer4-22 wt%, antistatic agglomerate 3-4 wt% and stabilizing assistant 2-6 wt%. The said materials are mixed, and the mixture is heated and flowed to form the adhesive protecting film, which is further corona treated and printed with ad and other content on it. The adhesive protecting film has high transparency, high elasticity, high flexibility, low density, high heat stability, application temperature of 0-75 deg.c and environment friendship.

Description

【Technical field】 [0001] The present invention relates to protective films, in particular to self-adhesive protective films. 【Background technique】 [0002] During storage and transportation, small mobile phone screens to large car exterior paint films are often eroded by ultraviolet rays, acid rain in the atmosphere, bird droppings, small insects, microorganisms, and salt spray in seawater. It is also easy to be polluted, scratched, and scratched during transportation and transportation. Therefore, many household appliances, high-end furniture, and decorative materials need to be protected with protective films. The protective film covers the surfaces of polycarbonate boards, acrylic boards, PS boards, PP board displays, etc., and can protect during storage, transportation and construction. The protective film is divided into two types: glue-coated protective film and three-layer melt co-extruded blown protective film. [0003] The glue-coated protective film is made of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L23/06
Inventor 俞明高
Owner 海宁海欣真空包装有限公司
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