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Polyethylene terephthalate film and method for preparing same

A technology of polyethylene terephthalate and ethylene glycol, which is applied in the field of polyethylene terephthalate film, and can solve problems affecting film quality and appearance, stains, etc.

Inactive Publication Date: 2012-06-06
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cyclic oligomers have obvious adverse effects on film processing. If the content of oligomers is greater than 3%, when the film goes through a long-term process, the oligomers will be deposited on the surface of the film and stain the surface of the film, affecting Improve the quality and appearance of the film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Concrete reaction process is as follows:

[0036]Put 13 kg of terephthalic acid and 5.6 kg of bio-ethylene glycol into the device with a stirring and rectifying tower for direct esterification reaction. When the esterification reaction rate is above 95%, the esterification reaction is ended and gradually Add catalyst titanium compound, magnesium compound, phosphorus compound. Wherein the addition amount of titanium element in the titanium compound as polymerization catalyst is 5ppm, the addition amount of magnesium element in the magnesium compound is 40ppm, the addition amount of phosphorus element in the phosphorus compound is 13ppm (the above-mentioned addition amount is relative to the addition of polyester weight quantity). Then depressurize to about 300Pa under atmospheric pressure for one hour, and the temperature rises to 290°C after one and a half hours. When the reaction is completed, the temperature in the kettle is 290°C, and the final pressure is about 200...

Embodiment 2

[0038] Embodiment 2: relative to polyester weight, the addition of following material is:

[0039] The amount of antimony element added in the antimony compound is 120ppm

[0040] The amount of phosphorus added in the phosphorus compound is 16ppm

[0041] The amount of magnesium added in the magnesium compound is 60ppm

[0042] The amount of potassium added in potassium hydroxide is 6ppm

[0043] All the other are with embodiment 1. The slices obtained were vacuum-dried at a temperature of 170° C. for 5 hours, and then entered into a screw extruder for extrusion, casting, electrostatic adsorption, stretching, shaping, and finally traction and winding. The extrusion temperature is 265°C, the stretching zone temperature is 100°C, and the setting temperature is 220°C.

Embodiment 3

[0045] Put 15 kilograms of dimethyl terephthalate and 9.5 kilograms of bioethylene glycol into the device with stirring and rectification tower to carry out transesterification reaction (EI reaction), the magnesium acetate addition amount of catalyst in the transesterification is 200ppm, The addition amount of manganese acetate is 100ppm (wherein the addition amount is relative to the addition amount of polyester weight) to mix, and react under normal pressure, when the esterification reaction rate is more than 95%, end the esterification reaction. And gradually add catalyst antimony compound, magnesium compound, phosphorus compound, potassium compound. Wherein, the addition amount of antimony element in the antimony compound as the polymerization catalyst is 120ppm, the addition amount of magnesium element in the magnesium compound is 33ppm, the addition amount of phosphorus element in the phosphorus compound as a stabilizer is 16ppm, and the addition amount of potassium eleme...

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Abstract

The invention discloses a polyethylene terephthalate film and a method for preparing the same. The content of cyclic oligomer in the film is less than 1 weight percent; the film has higher electrostatic adsorption capability, and the fusion specific resistance of the film is less than 4.0*10<7>omega cm; and the carbon element in the dibasic alcohol which is a raw material used for preparing the film is sourced from biological materials. The carbon element component in the dibasic alcohol component of the product is sourced from the biological materials, but not from petroleum materials, thereby greatly reducing the emission of CO2 caused by petroleum refining.

Description

technical field [0001] The invention relates to a polyethylene terephthalate film. Background technique [0002] In recent years, with the deterioration of the human living environment, people pay more and more attention to the development of environmentally friendly materials and the use of renewable raw materials. Petroleum, as a non-renewable resource, is the most important chemical raw material, but due to the large amount of CO in use engineering and final waste 2 emissions, CO 2 A large amount of emissions has led to a series of problems such as global warming, and directly threatens the survival of human beings. How to replace and reduce the use of petroleum as raw materials is one of the important research issues facing people. [0003] Now people use renewable biological resources to develop various new polyesters. For example, DuPont has prepared 1,3-PDO by fermenting corn through biological and chemical processes, and has developed a product containing about 36...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L67/02B29C69/00B29C47/92B29C55/02B29L7/00B29C48/92
CPCB29C48/9185B29C48/04B29C48/08B29C48/92B29C2948/92704B29C2948/92895
Inventor 卢群英盛思义李旭本田圭介
Owner TORAY FIBER RES INST(CHINA) CO LTD