A manufacturing method of a high-haze high-viscosity protective film
A protective film, high haze technology, used in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of too much sticking, not sticking, and too much precipitation, and achieve softening. The effect of point improvement, increased fluidity, and superior temperature resistance
Inactive Publication Date: 2016-08-10
SUZHOU CHANGGONG PHOTOELECTRIC TECH CO LTD
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Problems solved by technology
[0002] At present, high-viscosity self-adhesive protective films are ubiquitous in the market, with a lot of precipitation, either the stickiness cannot be attached, or the viscosity is increased too much, causing the sticky items to be stuck together and damage the posted items.
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[0023] Specific implementation plan
[0024] Hereinafter, the present invention will be explained in more detail through examples, but the present invention is not limited to these examples.
[0025] The A layer is 80% random copolymerized PP+10% low pressure polyethylene, the B layer is 90% random copolymerized PP+10% high pressure polyethylene, and the C layer is the blended adhesive layer described above.
[0026] The ratio of A layer is 30%, the ratio of layer is 60%, and the ratio of layer C is 10%.
[0027] The thickness of the entire film is 50u.
[0028] Viscosity test method: cut the film into 25mm wide and 200mm long, stick to the surface of the object, and then test the peeling force on a tensile machine. The tensile machine speed is 300mm / min and the peeling angle is 180 degrees.
[0029] Residual test method: stick the finished film on the surface of the sticker, compact it with a pressure roller, and test for 24 hours at room temperature, 65 degrees high temperature, and 90...
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Abstract
A manufacturing method of a high-haze high-viscosity protective film is disclosed. The protective film is manufactured mainly by a three-layer co-extrusion manner, wherein an A layer comprises polypropylene and polyethylene which are blended, a B layer comprises polypropylene and polyethylene which are blended, and a C layer comprises blended polystyrene type elastomers. The method is characterized in that the polypropylene is adopted as a substrate, haze is formed through roughness of the raw material itself and diffuse reflection caused by incompatibility between the polypropylene and the polyethylene so as to avoid precipitation of small molecules, and the C layer is an adhesive layer, is blended through adopting a unique formula, and adsorbs based on static actions of the material itself. The protective film has high-temperature resistance, capability of being not liable to degum, high haze, high viscosity, and other functions. The protective film is high in surface haze, and therefore the protective film is especially easy to uncoil and is not liable to adhere during high-viscosity product manufacturing, and the protective film is particularly suitable for brightening films, light guide plates, steel plates, and other industries requiring high viscosity for adhesion.
Description
Technical field [0001] The present invention relates to a high-haze, high-viscosity protective film, which is especially suitable for industries that require high-viscosity bonding such as brightness enhancement films, light guide plates, steel plates and the like. Background technique [0002] At present, high-viscosity self-adhesive protective films are common in the market, and they precipitate too much. Either the stickiness is not attached or the adhesion is too strong, which causes the sticking of the sticking article to break the sticking article. And many products, such as brightness enhancement film, light guide plate, etc., have the difference between the front and the back. At present, they are distinguished by colored protective films. This is costly and the color masterbatch has the risk of small molecules precipitation. The protective film of the present invention can The high-haze protective film is used to replace the colored protective film, so that the front and...
Claims
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IPC IPC(8): B32B27/08B32B27/32B32B27/30B32B27/20
CPCB32B27/08B32B27/20B32B27/302B32B27/32B32B2250/03B32B2250/24B32B2270/00B32B2323/04B32B2323/10B32B2325/00
Inventor 许伟铭周有成黄和兵
Owner SUZHOU CHANGGONG PHOTOELECTRIC TECH CO LTD