Security film

Abstract

A security film comprises at least two layers of polyethylene alkyl ester calendaring films. The polyethylene alkyl ester calendaring films are bonded and fit by polyacrylic acid pressure-sensitive adhesives. In order to ensure the security film to bear higher strength impact, the bonding strength between the two adjacent layers of polyacrylic acid pressure-sensitive adhesives can be different so that different forms of micro displacement happens when the security film endures different kinds of impact, and the basic films on different lamination can also undergo stretching to different extents. The micro displacement and film stretching lengthen the work path of the impact force, effectively weaken the impact strength and finally relieve the impact. The security film can ensure the common glass 3-5-6mm in thickness to have the effect of preventing injuries in accidents, theft and bullets after being bonded on the glass and meet various requirements of the CAS140-2007 standard on security films on glass of China Association for Standardization.

Description

technical field [0001] The invention relates to a glass safety film, which is a safety film bonded on one surface of glass. Background technique [0002] The glass safety film is composed of a basic film, a special function film, and a light control film. The base membrane is produced by calendering as usual for thin films. After the basic film is generated, the adhesive is coated on it, and then the second basic film or functional film and light control film are superimposed on it, and then the production of the safety film is completed through pressing, finishing, tempering and other processes. . [0003] Based on the inherent high hardness of quartz materials such as glass, general materials including most metal materials are not easy to invade the glass substrate due to insufficient hardness. The essence of glass fragility is the lack of internal tension stress, that is, the stress that absorbs itself inward. After being impacted, the glass tends to spall around and c...

AI Technical Summary

Problems solved by technology

[0004] The effect of ordinary glass safety film against strong impact is not ideal, and it cannot make ordinary glass reach the level of practical protection, which is defined in the glass safety film standard CAS140-2007 of China Standardization Association, and can meet the standards of preventing accidental injury, anti-theft, bulletproof, etc.

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