Method for preparing composite protective film

A protective film and composite technology, which is applied in the field of preparing composite protective films, can solve the problems of shortened service life, low water absorption, no anti-tear and anti-static, etc., and achieve the effect of expanding the application range and enhancing the service life

CN107538773AInactive Publication Date: 2018-01-05天津恩博华科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-01-05
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a method for preparing a composite protective film, which comprises the following steps: (1) placing a PET material in a punching machine for punching and forming to obtain an unprinted PET layer; (2), in the unprinted PET layer One surface of the PET layer is printed with a layer to obtain a printed PET layer; (3), the printed PET layer is placed in a dryer for baking; (4), the baked printed PET layer is placed in a molding In the production mold, liquid silica gel or plastic is then smeared on the layer of the printed PET layer, and the printed PET layer and the liquid silica gel are connected into one body by hot pressing to obtain a composite protective film; (5), The composite PET protective film can be obtained by cooling the composite protective film at room temperature. By this method, the PET can be connected with the liquid silica gel or plastic as a whole to obtain a composite PET protective film, which expands the application range of the PET protective film and enhances the service life of the product.
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Description

technical field

[0001] The invention relates to the technical field of preparation methods of PET protective films, in particular to a method for preparing composite protective films. Background technique

[0002] Polyethylene terephthalate (PET) is a highly crystalline polymer with excellent wear resistance, electrical insulation, flame retardancy, heat aging resistance and low water absorption. Therefore, it has PET protective film with special protective properties is widely used in electronic products such as computers, digital cameras and mobile phones. The existing PET protective film is mainly made of a layer of release film and a layer of PET original film. After the film is coated with glue, it is then laminated with a layer of PET release film. This PET protective film only has basic properties such as waterproof, wear-resistant and high-temperature resistance, and does not have other characteristics such as tear-proof and anti-static, which limits the PET protecti...

Examples

Embodiment 1

[0015] (1) Placing the PET material in a stamping machine for stamping to obtain an unprinted PET layer;

[0016] (2) Print a layer on a surface of the unprinted PET layer to obtain a printed PET layer;

[0017] (3) Place the printed PET layer in a dryer for baking, wherein the baking temperature is 60°C and the baking time is 50 minutes;

[0018] (4) Put the printed PET layer of the baking shield in the molding production mold, then apply liquid silicone on the layer of the printed PET layer, and connect the printed PET layer and liquid silicone by hot pressing to form a composite Protective film, wherein the temperature of hot pressing is 110°C and the pressure is 70kg / cm 2 , the time is 80 seconds;

[0019] (5) Cool the composite protective film at room temperature to obtain the finished composite PET protective film.

Embodiment 2

[0021] (1) Placing the PET material in a stamping machine for stamping to obtain an unprinted PET layer;

[0022] (2) Print a layer on a surface of the unprinted PET layer to obtain a printed PET layer;

[0023] (3) Place the printed PET layer in a dryer for baking, wherein the baking temperature is 80°C and the baking time is 60 minutes;

[0024] (4) Put the printed PET layer of the baking shield in the molding production mold, then apply liquid silicone on the layer of the printed PET layer, and connect the printed PET layer and liquid silicone by hot pressing to form a composite Protective film, wherein the temperature of hot pressing is 120°C and the pressure is 80kg / cm 2 , the time is 100 seconds;

[0025] (5) Cool the composite protective film at room temperature to obtain the finished composite PET protective film.

[0026] Through the above method, the PET material can be connected with liquid silica gel or plastic material with special properties to obtain a compos...