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Anti-static film

A technology of anti-static film and anti-static layer, which is applied in conductive coatings, coatings, polyurea/polyurethane coatings, etc., can solve problems such as failure and high surface resistance of the film, and achieve good adhesion and excellent anti-static performance.

Active Publication Date: 2018-06-22
HEFEI LUCKY SCI & TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the surface resistance value of the film is too high or becomes invalid after the water-based carbon nanotube dispersion is coated and stretched 3 to 5 times in the existing online coating technology, the present invention provides an antistatic film whose antistatic layer adopts The water-based carbon nanotube dispersion is prepared with a special water-based polyurethane resin. The polyester film is coated with an anti-static layer and then stretched 3 to 5 times in the transverse direction, then heat-set and rolled. The surface resistance of the obtained film can reach 10 5 ~10 6 , with excellent antistatic performance, good follow-up processing performance, thin coating, low coating cost, etc.

Method used

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preparation example Construction

[0029] Antistatic film preparation method of the present invention, concrete steps are:

[0030] 1. First, the crystallized and dried polyester chips are sent to the corresponding extrusion system for melt extrusion, and cast on the rotating cooling roller.

[0031] 2. Preheat the cooled cast sheet to stretch longitudinally, and the longitudinal stretch ratio is 3 to 5 times.

[0032] 3. By means of gravure coating, wire rod coating, dip coating, etc., apply the prepared antistatic coating solution on one or both sides of the film after longitudinal stretching, wherein the wet coating amount 5g / m 2 ~7g / m 2 .

[0033] 4. After the film coated with antistatic coating solution is heated and dried at 60°C to 180°C, it is transversely stretched 3 to 5 times.

[0034] 5. After heat setting and winding at 180°C to 240°C, an antistatic film is obtained.

Embodiment 1

[0037] Preparation of antistatic coating solution:

[0038] Get 2g water-based carbon nanotube dispersion (the trade mark is CNTS-016, Suzhou Carbonfeng Graphene Technology Co., Ltd., the weight ratio of carbon nanotubes in the water-based carbon nanotube dispersion is 20%), 2g water-based polyurethane resin (the trade mark Huayue , Hefei Huayue New Material Technology Co., Ltd., the molar ratio of isocyanate and hydroxyl group contained in water-based polyurethane resin is 1:0.8, the hydroxyl value is 80mgKOH / g, and the elongation rate is 300%), 0.5g crosslinking agent (the brand is 710, Changzhou Lanya New Material Technology Co., Ltd.), 0.2g leveling agent (brand H6-1, Dongguan Bocheng Chemical Co., Ltd.), 0.1g defoamer (brand F12, Dongguan Defeng defoamer Co., Ltd.), 0.2g wetting agent (brand name is Silok-8008, Guangzhou Silok Chemical Co., Ltd.) was added to 95g water, and dispersed evenly with a high-shear emulsifier to make an antistatic coating solution.

[0039] Pre...

Embodiment 2

[0042] Preparation of antistatic coating solution:

[0043] Get 6g water-based carbon nanotube dispersion (the trade mark is CNTS-016, Suzhou Carbonfeng Graphene Technology Co., Ltd., the weight ratio of carbon nanotubes in the water-based carbon nanotube dispersion is 25%), 8g water-based polyurethane resin (the trade mark PU- 2840, Yuheng Environmental Protection Materials Co., Ltd., the molar ratio of isocyanate and hydroxyl group contained in water-based polyurethane resin is 2:1, the hydroxyl value is 120mgKOH / g, and the elongation is 500%), 1.0g crosslinking agent (grade 710 , Changzhou Lanya New Material Technology Co., Ltd.), 1g leveling agent (brand H6-1, Dongguan Bocheng Chemical Co., Ltd.), 1g defoamer (brand F12, Dongguan Defeng Defoamer Co., Ltd.) 1. 1g wetting agent (brand name is Silok-8008, Guangzhou Silok Chemical Co., Ltd.) was added to 82g water, and dispersed evenly with a high-shear emulsifier to make a kind of antistatic coating liquid.

[0044] Preparat...

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Abstract

The invention provides an anti-static film. The anti-static film comprises a base material and at least one surface of anti-static layer of the base material; the anti-static layer is formed by dryingraw materials, carrying out transverse tensile on the dried raw materials with the base material synchronously, and then carrying out sizing, wherein the raw materials are the follows in percentage by weight: 2-10% of a water-based carbon nanotube dispersing agent, 2-15% of waterborne polyurethane resin, 0.5-2% of a cross-linking agent, 0.5-5% of an assistant and 68-95% of deionized water. The surface resistance value of the anti-static film provided by the invention can reach 10<5>-10<6>, and the adhesive force is stable.

Description

technical field [0001] The patent of the present invention relates to an antistatic film, which can be applied to subsequent processing of release film, protective film, packaging and other fields. Background technique [0002] Optical films in liquid crystal displays are more and more widely used. During the transportation and deep processing of these optical films, electrostatic effects will cause pollution to the film, resulting in various disadvantages in the deep processing process and affecting the overall quality of the optical film. Therefore, it is necessary to cover an antistatic protective film on the surface of the optical film. [0003] Most common antistatic protective films are to apply an antistatic layer off-line, then apply an adhesive layer off-line on at least one side, and finally cover the adhesive layer with a release film to obtain a protective film. This preparation process is more complicated and the cost is higher. On-line coating of antistatic l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C09D175/04C09D5/24C09D7/61C08L67/00
CPCC08J2367/00C08J2475/04C08K7/24C08K2201/011C08J7/0427
Inventor 郑云霞高俊红霍新莉周守发李恒
Owner HEFEI LUCKY SCI & TECH IND
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