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High transparent multi-layer coextrusion biaxially-oriented polyester film and its production method

A technology of biaxially stretching polyester and polyester film, applied in the field of packaging industry, which can solve the problems of high manufacturing cost and achieve the effects of good processability, low haze and high light transmittance

Inactive Publication Date: 2005-02-16
SHANGHAI ZIDONG FILM MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in its patent, the middle layer of the film does not use recycled slices, and the manufacturing cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation of embodiment 1 polyester raw material

[0032]Two kinds of silicon dioxide with different particle sizes are mixed in ethylene glycol to prepare the ethylene glycol suspension of silicon dioxide. According to the conventional polymer synthesis method-direct polymerization method (PTA method) to produce polyester chips, first carry out Esterification reaction, then polycondensation reaction, before polycondensation, add ethylene glycol suspension containing silicon dioxide and polycondensation catalyst and stabilizer in the prior art, at 280 ° C, vacuum degree 10-66.7Pa, stirring speed 40rpm, The reaction time is between 2-3 hours, and mother slices are prepared. Mother slice M 1 (IV = 0.63) contains 3000ppm of Fuji Silicon S350 (particle size: 1.8μm), master chip M 2 (IV = 0.63) contained 2000 ppm of Fuji Silicon S350 (particle size: 1.8 μm) and 1000 ppm of Degussa OX-50 (particle size: 50 nm). The polyester chip raw materials used in the present inv...

Embodiment 2

[0034] Example 2 The performance test of biaxially stretched polyester film under different raw materials and parameters, and its comparison with the film structure and film performance of Comparative Example

[0035] In the present embodiment, a large amount of experimental data and experimental results are described, and the parameters of the biaxially stretched polyester film of the present invention are changed item by item and the resulting film properties are listed to prove the production of the biaxially stretched polyester film of the present invention. The optimal parameters required for stretching the polyester film, and the difference in structure and performance between the biaxially stretched polyester film of the present invention and the film of the comparative example can also be understood. E1-E7 described below is the experimental test of changing different raw materials and parameters to the three-layer co-extruded polyester film of the present invention; C1...

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PUM

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Abstract

The invention discloses a double directions draught polyester membrane, it includes at least three crush together framework. In the execution of this invention, the two layers of the double directions draught polyester membrane layer A and layer C, one media layer B, layer A and layer C have resist stick reagent, the layer B can be used recycle chip. This invention also discloses the produce method of the double directions draught polyester membrane, including polyester material preparation, crush out, casting chip, draught, heat molding, relax, pull, reel and so on. This double directions draught polyester membrane has high varnish, low mist, and very good machining capacity, especially the capacity of reel and chip is very good, on the other way, the recycle chip can be used, so the produce cost is low. This membrane can be widely used in packet industry.

Description

technical field [0001] The invention belongs to the field of packaging industry and relates to a biaxially stretched polyester film. Furthermore, the invention relates to a biaxially stretched polyester film with at least three layers of co-extruded structure with high transparency, high gloss, low haze and good processability. Polyester film and method for its production. Background technique [0002] Biaxially oriented polyester film with high transparency, high gloss and good processability is often used in the packaging industry. It can make the packaging surface more attractive, thereby stimulating consumers' desire to purchase the packaged product. [0003] In the manufacture of film, the slipperiness and abrasion resistance of the film surface not only affect the production process of biaxially oriented polyester film, but also directly affect the quality of the final product. In order to improve the slipperiness of the film, it is usually necessary to add additives ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/04B29C55/12
Inventor 唐延寿王兆明辛国孙树贵戴炼
Owner SHANGHAI ZIDONG FILM MATERIAL CO LTD
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