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A kind of preparation method of polyester for film

A technology for polyester and film, which is applied in the field of polyester film manufacturing. It can solve the problems affecting the quality of polyester film and the difficulty in ensuring the anti-agglomeration effect, and achieve the effects of improving gloss, improving processing performance and maintaining stability.

Active Publication Date: 2022-02-18
JIANGSU SHUANGXING COLOR PLASTIC NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-agglomeration effect of such conventional dispersion methods is difficult to guarantee
[0005] The above-mentioned prior art all mentioned adding various inorganic particles in the preparation process of polyester film, but the modification of inorganic particles is more conventional. In the actual production process, the problem of particle agglomeration is still very common, which seriously affects the polyester film. film quality

Method used

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  • A kind of preparation method of polyester for film
  • A kind of preparation method of polyester for film

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The preparation of polyester of the present invention, taking PET as example, preferably produces bishydroxyethyl terephthalate through esterification or transesterification of terephthalic acid or dimethyl terephthalate and ethylene glycol, by It is industrially produced by a polycondensation method in which a catalyst is used for polycondensation under high temperature and vacuum. In a specific embodiment, terephthalic acid, ethylene glycol, cyclohexanedimethanol, catalyst and heat stabilizer can be used as raw materials for esterification; or terephthalic acid, ethylene glycol, isophthalic acid , catalyst and heat stabilizer as raw materials for esterification. In another specific embodiment, the catalyst is any compound of Ti / Si non-heavy metal catalyst and antimony trioxide, and its addition amount is 0.01-0.09% of the polyester mass. In another specific embodiment, the heat stabilizer is a phosphoric acid compound, and its addition amount is 0.0003-0.030% of the ...

Embodiment

[0031] The meanings of each abbreviation in the following examples are as follows:

[0032] Terephthalic acid: PTA Ethylene glycol: EG Polystyrene: PS

[0033] Polyethylene: PE Polylactic acid: PLA Polydimethylsiloxane: PDMS

[0034] In the following examples, PET or PETG is used as polyester, and airgel is compared with ordinary SiO2.

[0035] The ingredients of each embodiment and comparative example are shown in the table below.

[0036]

[0037] The polyester for film prepared in Examples 1-3 and Comparative Examples 1-3 was stretched into a film of 60 μm by a stretching process, and the test properties were as follows.

[0038]

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Abstract

The present application proposes a method for preparing polyester for film, comprising the following steps: after uniformly mixing polystyrene or polyethylene, polylactic acid, aerogel, alkaline earth metal silicate and polydimethylsiloxane, Extrude and granulate to obtain functional material granules; within 24 hours after the prepared functional material granules are produced, add functional material granules to polyester in the form of granules or slices; finally extrude and granulate to obtain functional material granules Polyester for films with a content of 1.0wt%-5.0wt%. The functional material particles are selected to be added to the polyester during the polycondensation stage of the polyester. After the film polyester of the present application is added with functional material particles, it has little influence on the viscosity of the original polyester, which is conducive to maintaining the stability of the polyester film parameters; it can also reduce the amount of anti-blocking particles; it improves the processing of the polyester film performance, tensile strength, light transmittance and flame retardancy. In addition, it can also improve the glossiness, wear resistance, high temperature resistance and heat insulation performance of polyester film.

Description

technical field [0001] The invention relates to the field of polyester film manufacturing, in particular to a method for preparing polyester film for polyester film, which can be used in glass, building materials, printing, medical and health, optics, packaging and other application fields . Background technique [0002] Polyester is a general term for polymers obtained by polycondensation of polyols and polyacids. There are many types of polyester, the public is more familiar with PET (polyethylene terephthalate), PBT (polybutylene terephthalate), PTT (polytrimethylene terephthalate), PCT ( Polyester-1,4-cyclohexanedimethanol, etc. Polyester, especially polyester film represented by PET, is usually made of polyethylene terephthalate by extrusion Thick sheets, and then biaxially stretched film materials are widely used in glass, building materials, printing, medicine and health, optics, packaging and other fields. [0003] CN 108610609 A discloses a high-shrinkage polyest...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L25/06C08L23/06C08L67/04C08L83/04C08K3/34C08K7/26C08J5/18
CPCC08J5/18C08J2367/02C08J2425/06C08J2423/06C08J2467/04C08J2483/04C08K3/34C08K7/26C08K2201/005
Inventor 吴培服邓十全池卫罗海洋
Owner JIANGSU SHUANGXING COLOR PLASTIC NEW MATERIALS