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Low-precipitation polyester film and preparation method thereof

A polyester film, polyester base film technology, used in polyester coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as unfriendly environment, and prevent the decrease of light transmittance and the increase and expansion of haze. Scope of application, simple effect of preparation method

Pending Publication Date: 2022-03-11
BAODING LUCKY FILM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the paint used in the realization of this technology contains a large amount of organic solvents, which is not friendly to the environment

Method used

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  • Low-precipitation polyester film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The formula of the water-soluble coating solution is: 5.0 parts of water-based polyurethane, 0.5 parts of polyisocyanate, 0.1 part of sodium dibutylnaphthalene sulfonate, 0.1 part of modified polysiloxane and 94.3 parts of deionized water. The permanent coating liquid is coated on the upper and lower surfaces of the polyethylene terephthalate base film with a thickness of 125 μm after corona treatment, and baked at 120 ° C for 1 min to obtain a polyester base film and a polyester base film. A thin film of a low-emission coating on the surface of an ester-based film, wherein the thickness of the low-emission coating is 2 μm.

Embodiment 2

[0022] The formula of the water-soluble coating solution is: 4.0 parts of water-based acrylate, 0.9 parts of multifunctional carbodiimide, 0.1 part of sodium dodecylsulfonate and 95.0 parts of deionized water, and the water-soluble coating solution is coated Spread on the upper and lower surfaces of the polyethylene terephthalate base film with a thickness of 125 μm after corona treatment, and bake at 120 ° C for 1 min to obtain a polyester base film and adhere to the surface of the polyester base film A thin film of the low-emission coating, wherein the thickness of the low-emission coating is 2 μm.

Embodiment 3

[0024] The formula of the water-soluble coating solution is: 4.0 parts of water-based polyurethane, 4.0 parts of water-based polyester, 1.0 part of polyisocyanate, 0.5 part of polyfunctional aziridine, 0.3 part of modified polysiloxane and 91.2 parts of Ionized water, apply the water-soluble coating solution on the upper and lower surfaces of the polyethylene terephthalate base film with a thickness of 125 μm after corona treatment, and bake it at 120 ° C for 1 min to obtain a polyester base film and a thin film of a low-emission coating adhered to the surface of a polyester base film, wherein the thickness of the low-emission coating is 2 μm.

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Abstract

The low-precipitation polyester film comprises a polyester base film and a low-precipitation coating coated on the surface of the polyester base film, and the low-precipitation coating is obtained by coating and curing water-soluble coating liquid, the 100% by mass of the water-soluble coating liquid is prepared from 4 to 12 parts by mass of water-soluble resin, 85 to 95 parts by mass of deionized water, 0.5 to 3 parts by mass of a cross-linking agent and 0.1 to 0.3 part by mass of a surfactant. The polyester base film is coated with the low-precipitation coating, precipitation of low-molecular-weight substances in the polyester base film is effectively reduced, and light transmittance reduction and haze increase of the polyester film in the subsequent processing process are prevented.

Description

technical field [0001] The invention relates to a low-separation polyester film and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] During the production and use of polyester film, low molecular weight substances will be precipitated due to processing technology. The precipitation of these low molecular weight substances is mainly caused by the following four aspects: 1. The polyester film is mainly produced by melt co-extrusion. During the extrusion process, the temperature of the extruder is high, and the molecular chain of the polyester chips will be broken. Produce low molecular weight segments; 2. The use of recycled materials will lead to more low molecular weight segments; 3. In order to improve the adhesion of the laminated substances, the polyester film needs to be corona treated. During the corona treatment, the polyester Molecules are easily degraded into low-molecular-weight substances; 4. The po...

Claims

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Application Information

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IPC IPC(8): C08J7/04C09D175/04C09D4/02C09D7/63C09D7/65C09D4/06C08L67/02C08L69/00
CPCC08J7/04C09D175/04C09D167/00C09D4/00C09D7/63C09D7/65C09D4/06C08J2367/02C08J2369/00C08J2475/04C08J2467/00C08L83/04C08L75/04C08L67/00
Inventor 张文广米晨露许德伟张玉安
Owner BAODING LUCKY FILM