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Polyester release film for optics

A release film, polyester technology, used in applications, household appliances, other household appliances, etc., can solve the problems of affecting personal health, low coating accuracy, easy to pollute the environment, etc., to reduce the phenomenon of rainbow patterns and ensure coating. The effect of flatness and avoiding secondary pollution

Active Publication Date: 2013-03-27
HEFEI LUCKY SCI & TECH IND +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increase in the size of flat panel displays, the requirements for the apparent quality of components such as polarizers, polarizer protective films, and organic EL components used in flat panel displays are getting higher and higher. The disadvantage of low light transmittance makes it difficult to find defects on the surface of polarizers and other products, which affects the quality of flat panel displays
[0004] As far as the production method is concerned, the existing release film products are usually produced by off-line coating, that is, the substrate is prepared first, and then the release layer is coated on the surface of the substrate. This preparation method has the following defects: ( 1) The process is complicated, which leads to an increase in product cost; (2) A large amount of organic solvents are used in the coating liquid, which is easy to pollute the environment and affect human health; (3) The coating accuracy is low, the thickness uniformity of the coating is poor, and the release film product The rainbow pattern is more serious, which affects the scope of use of the product

Method used

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  • Polyester release film for optics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 18 parts of water-based silicone elastomer emulsion DC 7935 (DOW CORNING); 2 parts of crosslinking agent DC 7975 (DOW CORNING); 110 parts of deionized water; the above materials are uniformly dispersed by a high-shear emulsifier to obtain a solid content of 5 % waterborne silicone elastomer coating.

[0019] The pre-crystallization and drying temperature of polyethylene terephthalate slices is about 160-180°C, the crystallization time is 10-20 minutes, and the drying time is 4-6 hours. After drying, the polyethylene terephthalate chip has a pre-crystallinity of 35% to 42%; the moisture content is W(H 2 O) <30ppm. The crystallized and dried polyethylene terephthalate chips enter the twin-screw extruder for heating, melting and plasticization, and the temperature of the extruder is 210°C-280°C. Directly determining the uniformity of the shape and thickness of cast slabs is the key to casting cast slabs. The temperature of the die head is controlled at 260 ° C to 28...

Embodiment 2

[0021] Take 27 parts of water-based silicone elastomer emulsion DC 7950 (DOW CORNING); 3 parts of crosslinking agent DC 7975 (DOW CORNING); 116 parts of deionized water; the above materials are uniformly dispersed by a high-shear emulsifier to obtain a solid content of 8 % waterborne silicone elastomer coating.

[0022] The pre-crystallization and drying temperature of polyethylene terephthalate slices is about 160-180°C, the crystallization time is 10-20 minutes, and the drying time is 4-6 hours. After drying, the polyethylene terephthalate chip has a pre-crystallinity of 35% to 42%; the moisture content is W(H 2 O) <30ppm. The crystallized and dried polyethylene terephthalate chips enter the twin-screw extruder for heating, melting and plasticization, and the temperature of the extruder is 210°C-280°C. Directly determining the uniformity of the shape and thickness of cast slabs is the key to casting cast slabs. The temperature of the die head is controlled at 260 ° C to 28...

Embodiment 3

[0024] Take 36 parts of water-based silicone elastomer emulsion DC 7980 (DOW CORNING); 4 parts of crosslinking agent DC 7975 (DOW CORNING); 116 parts of deionized water; the above materials are uniformly dispersed by a high-shear emulsifier, and the solid content is 10% waterborne silicone elastomer coatings.

[0025] The pre-crystallization and drying temperature of polyethylene terephthalate slices is about 160-180°C, the crystallization time is 10-20 minutes, and the drying time is 4-6 hours. After drying, the polyethylene terephthalate chip has a pre-crystallinity of 35% to 42%; the moisture content is W(H 2O) <30ppm. The crystallized and dried polyethylene terephthalate chips enter the twin-screw extruder for heating, melting and plasticization, and the temperature of the extruder is 210°C-280°C. Directly determining the uniformity of the shape and thickness of cast slabs is the key to casting cast slabs. The temperature of the die head is controlled at 260 ° C to 280 °...

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Abstract

The invention discloses a polyester release film for optics. The release film is obtained through bidirectional stretching, and is operated according to the following steps of: fusing and extruding polyester chips onto a casting sheet roller, and cooling, thereby obtaining polyester thick sheets; stretching the polyester thick sheets longitudinally, and coating waterborne organic silicone elastomer coating materials with the solid mass content of 5%-10% on at least one surface on line; and stretching horizontally again after preheating, thereby obtaining the polyester release film for optics through heat setting and winding. The release film provided by the invention is high in coating level degree, low in interference rainbow lines, low in haze, and high in transmissivity, and can be widely applied to components of various displays such as a polarizer, a polarizer protection film and organic EL (electroluminescence) for a panel display.

Description

technical field [0001] The invention relates to a film material technology, in particular to a polyester release film for optics. Background technique [0002] Polyester release film has been widely used in packaging, printing, screen printing, pad printing, nameplate, membrane switch, flexible circuit, insulation products, circuit board, laser anti-counterfeiting, lamination, electronics, film for sealing materials, reflective materials , waterproof materials, medicine (plaster paper), toilet paper, adhesive products, die-cutting and punching processing and other industries. [0003] Polyester release films for optics are used in various display components such as polarizing plates for flat panel displays, polarizing plate protective films, and organic EL due to their excellent characteristics. With the increase in the size of flat panel displays, the requirements for the apparent quality of components such as polarizers, polarizer protective films, and organic EL componen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/02B29C55/12C08J7/04C08J7/06C08L67/00B29L7/00
Inventor 李超熊跃斌张锐孙月姚烨
Owner HEFEI LUCKY SCI & TECH IND
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