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A kind of optical reflective film with low heat shrinkage and its preparation method

A technology of optical reflection and shrinkage rate, applied in the field of polyester film, can solve the problems of incomplete release of internal stress, incomplete cooling down, large thermal shrinkage, etc., and achieve excellent flatness, complete release of internal stress, and sufficient shaping

Active Publication Date: 2019-06-25
苏州盛达飞智能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the higher the temperature, the more complete the setting treatment. However, too high heat setting temperature will cause the material to not completely cool down when it comes out of the transverse stretching area, and the traction force of the winder will carry out the second time of the material when it is rolled. Stretching, resulting in incomplete release of internal stress, resulting in a series of problems such as wavy warping and excessive heat shrinkage

Method used

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  • A kind of optical reflective film with low heat shrinkage and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0026] An optical reflective film with low heat shrinkage rate, comprising a main layer of the reflective film and an auxiliary layer, the main layer is composed of the following materials in parts by weight: 2 parts of TiO with a particle size of 0.3 μm 2 , 2 parts of nucleating agent, 10 parts of polypropylene resin, 86 parts of polyethylene terephthalate, wherein the PET resin has a pore structure;

[0027] The auxiliary layer is made up of the following parts by weight: 85 parts of polyethylene terephthalate, 10 parts of antiblocking agent, 5 parts of antistatic agent, containing 0.3% SiO2 in the antiblocking agent 2 .

[0028] The preparation method of the optical reflective film with low heat shrinkage rate is as follows: according to the above formula, the raw materials used for the main layer and the auxiliary layer are respectively weighed, and after being dried and mixed by a mixing device, they are respectively melted and mixed by a twin-screw extruder, The main la...

Embodiment 2

[0031] An optical reflective film with low heat shrinkage rate, comprising a main layer of the reflective film and an auxiliary layer, the main layer is composed of the following parts by weight: 5 parts of TiO with an average particle size of 0.1 μm 2 , 3 parts of nucleating agent, 12 parts of polypropylene resin, 80 parts of polystyrene, wherein the PET resin has a pore structure;

[0032] The auxiliary layer is made up of the following parts by weight: 85 parts of polyethylene terephthalate, 10 parts of antiblocking agent, 5 parts of antistatic agent, containing 0.3% SiO2 in the antiblocking agent 2 .

[0033] The preparation method of the optical reflective film with low heat shrinkage rate is as follows: according to the above formula, the raw materials used for the main layer and the auxiliary layer are respectively weighed, and after being dried and mixed by a mixing device, they are respectively melted and mixed by a twin-screw extruder, The main layer and the auxilia...

Embodiment 3

[0036] An optical reflective film with low heat shrinkage rate, comprising a main layer of the reflective film and an auxiliary layer, the main layer is composed of the following parts by weight: 5 parts of barium sulfate with an average particle size of 0.8 μm, 5 parts of nucleating agent, 15 parts Parts of polypropylene resin, 75 parts of polyethylene terephthalate, wherein the PET resin has a pore structure;

[0037] The auxiliary layer is made up of the following parts by weight: 75 parts of polyethylene terephthalate, 20 parts of antiblocking agent, 5 parts of antistatic agent, containing 0.5% SiO2 in the antiblocking agent 2 .

[0038] The preparation method of the optical reflective film of described low heat shrinkage rate is the same as embodiment 2.

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Abstract

The invention relates to the field of polyester films, and specifically relates to an optical reflection film with a low thermal shrinkage rate, and a preparation method therefor. The reflection film comprises a reflection film main layer and an auxiliary layer on the main layer. The main layer comprises thermoplastic resin, incompatible resin, white inorganic filling particles and a nucleating agent. The auxiliary layer comprises thermoplastic polyester, an anti-adhesion agent and an antistatic agent. The reflection film is better in size stability, is excellent in flatness when being used in a backlight module group, and cannot be wrinkled because of temperature changes.

Description

technical field [0001] The invention relates to the field of polyester films, in particular to an optical reflection film with low heat shrinkage and a preparation method thereof. Background technique [0002] Liquid crystal display devices include a backlight system in which a light source is placed on the back of a backlight unit and a backlight system in which a light source is placed on the side. In the backlight unit, the reflective film is located at the bottom, which plays the role of reflecting the light leaked from the bottom of the light guide plate or the bottom of the diffusion plate back to the light emitting surface. Therefore, the flatness and dimensional stability of the reflective film have a great influence on the overall appearance of the screen. If the reflective film has different degrees of wrinkles and unevenness due to temperature changes, the uneven reflection of light will cause Mura phenomenon. [0003] At present, most of the reflective film mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/08C08L67/02C08L23/12C08L23/06C08L25/06C08K3/36C08K3/22C08K3/30C08K3/26B32B27/08B32B27/36B32B27/18B29D7/01
CPCB29D7/01B32B27/08B32B27/18B32B27/36B32B2250/02B32B2250/24B32B2307/416B32B2457/202C08K3/36C08L23/06C08L25/06C08L67/02G02B5/0841C08L23/12C08K2003/2241C08K2003/3045C08K2003/265
Inventor 林志武
Owner 苏州盛达飞智能科技股份有限公司
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