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High-transmittance polyester thin film and preparation method thereof

A technology of high-transparency polyester and transparent polyester, which is applied in the field of polyester film, can solve the problems of high continuity requirements, long time, and impact on the recycling and granulation of polyester chips, so as to improve sustainability and binding force Effects of preventing and improving light transmittance reduction

Active Publication Date: 2018-12-21
金华市星火塑料制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this production process has high requirements for the continuity of production, and it takes a long time from the start of production to the normal commissioning, and if the production interruption caused by film rupture occurs, online coating needs to be adjusted again; in addition, By bonding the anti-adhesion particles on the surface of the polyester film with the binder, the binder used in the anti-adhesion particles has brought a series of adverse effects on the degradation of the melted resin in the recycling granulation process, affecting the polyester film. Recycling and pelletizing of ester chips

Method used

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  • High-transmittance polyester thin film and preparation method thereof
  • High-transmittance polyester thin film and preparation method thereof

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preparation example Construction

[0046] The present invention also provides a method for preparing a high-transparency polyester film. The method includes weighing the raw materials used in the core layer and the surface layer according to the formula, and extruding them through a single-screw or twin-screw after drying and a mixing device. Melting and mixing by machine, main extrusion and auxiliary extrusion co-casting and extrusion at the die head, cooling and casting, and then longitudinal stretching, transverse stretching, and heat setting treatment to obtain polyester film.

[0047] It should be noted that the "longitudinal" of the above-mentioned "longitudinal stretch" refers to the direction along the movement of the polyester film, and the "transverse direction" of the "transverse stretch" refers to the direction along the width of the polyester film.

[0048] Further, in a specific production process, the longitudinal stretch ratio is 3.6-3.85, the transverse stretch ratio is 3.7-3.9, and the temperat...

Embodiment 1

[0054] A polyester film comprises a core layer and surface layers arranged on both sides of the core layer.

[0055] The surface layer comprises 95% polyethylene terephthalate, 0.15% of silicon dioxide particles (0.8 μm in particle size), 0.25% of antioxidant 168, 0.50% of antioxidant 1010, ultraviolet absorber UV-329 0.65%, antistatic agent (plastic antistatic agent 0006 produced by Zhongteng Chemical Co., Ltd.) 1.45%, dispersant (PEG, molecular weight 20000) 2%; described percentage content is mass percent;

[0056] The silicon dioxide particles and the compatibilizer ABS-g-MAH (grafting rate ≥ 0.5%) are ultrasonically dispersed in acetone, the acetone is recovered and dried to obtain the compatibilizer-coated silicon dioxide particles. Among them, the mass ratio of silica particles, compatibilizer ABS-g-MAH (grafting rate ≥ 0.5%) and acetone is 1:0.07:19;

[0057] The preparation method of described polyester film comprises:

[0058] The raw materials used for the core la...

Embodiment 2

[0063] The polyester film that provides as embodiment 1, in the modified treatment of silicon dioxide particle, the mass ratio of silicon dioxide particle, compatibilizer ABS-g-MAH (grafting rate ≥ 0.5%) and acetone is changed to 1:0.07:18, with the rest unchanged, the polyester film was prepared, and the prepared polyester film was recorded as A2.

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Abstract

The invention belongs to the technical field of polyester thin films and in particular relates to a high-transmittance polyester thin film and a preparation method thereof. The high-transmittance polyester thin film comprises a core layer and a surface layer arranged at one side or two sides of the core layer, wherein the surface layer is prepared from the following components in percentage by mass: 93 to 97 percent of polyethylene terephthalate, 0.08 to 0.25 percent of inorganic particles and 2.75 to 6.92 percent of other auxiliary agents, wherein the inorganic particles are subjected to coating and modification treatment through a compatilizer. According to the high-transmittance polyester thin film provided by the invention, the inorganic particles subjected to the coating and modification treatment through the compatilizer are added into the surface layer, so that the binding capability of the inorganic particles and polyethylene terephthalate in the surface layer of the polyesterthin film is improved; a gap formed at the periphery of the inorganic particle in the biaxially-stretched and molded polyester thin film is reduced, so that the problem that the inorganic particles exist so that the light penetration rate is low is remarkably reduced; the binding force between the inorganic particles subjected to the coating and modification treatment through the compatilizer andpolyethylene terephthalate is relatively strong, and a series of appearance problems caused by the fact that the inorganic particles fall off are prevented.

Description

technical field [0001] The invention belongs to the technical field of polyester films, and in particular relates to a high-transparency polyester film and a preparation method thereof. Background technique [0002] Polyester film (PET) is a film material made of polyethylene terephthalate as a raw material, which is made into a thick sheet by extrusion and then biaxially stretched. The polyester film has many excellent characteristics: mechanical strength High, excellent optical performance, good electrical insulation performance, good barrier performance, wide operating temperature range (-70 ° C ~ 200 ° C), chemical corrosion resistance and good dimensional stability, etc., so it is widely used in packaging, electronic power and photography, Magnetic products and other fields. In recent years, due to the rapid development of liquid crystal display, polyester film also has important applications in the optical field. [0003] At present, the light transmittance of the po...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K9/10C08K3/36C08K5/526C08K5/134C08K13/06C08J5/18B32B27/08B32B27/36B32B27/18
CPCB32B27/08B32B27/18B32B27/36C08J5/18C08J2367/02C08K3/36C08K5/1345C08K5/526C08K9/10C08K13/06
Inventor 曹立军
Owner 金华市星火塑料制品有限公司
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