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Modified polyethylene terephthalate (PET) film for lithium battery flexible packaging film

A flexible packaging film and lithium battery technology, applied in the field of modified polyester, can solve the problems of poor gas barrier properties and gas barrier properties of PET, and achieve the effects of protecting the structure, uniform particle size, and accelerated water sublimation

Active Publication Date: 2020-01-24
JIESHOU CITY TIANHONG PACKAGING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a modified PET film for lithium battery flexible packaging film, to solve the above-mentioned background to improve the PET material itself has poor gas barrier properties and other problems
[0007] (1) How to solve the problem of poor gas barrier properties of PET

Method used

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  • Modified polyethylene terephthalate (PET) film for lithium battery flexible packaging film
  • Modified polyethylene terephthalate (PET) film for lithium battery flexible packaging film
  • Modified polyethylene terephthalate (PET) film for lithium battery flexible packaging film

Examples

Experimental program
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Effect test

Embodiment 1

[0041] see Figure 1-3 Shown, a kind of modified PET film that is used for lithium battery flexible packaging film, this modified PET film is made up of the following components in parts by weight: 71.5 parts of terephthalic acid, 130 parts of ethylene glycol, nanometer montmorillonite 12.4 parts, 5.4 parts of polyethylene glycol, 4.8 parts of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane;

[0042] Modified PET film preparation method:

[0043] S1. Put nano-montmorillonite, dispersant and coupling agent, terephthalic acid and ethylene glycol into the reactor. The temperature of the reactor is 195.5°C and the pressure is 0.34MPa. Terephthalic acid and ethylene glycol ester Chemical reaction obtains polyethylene terephthalate with low degree of polymerization;

[0044] S2. When the temperature of the reactor is 256°C and the pressure is 32Pa, polyethylene terephthalate with a low degree of polymerization undergoes a polycondensation reaction in the nano-montmorillonite. Durin...

Embodiment 2

[0056] see Figure 1-3 Shown, a kind of modified PET film that is used for lithium battery flexible packaging film, this modified PET film is made up of the following components in parts by weight: 73.5 parts of terephthalic acid, 136.5 parts of ethylene glycol, nanometer montmorillonite 21.6 parts, 1.6 parts of polyethylene glycol, 1.8 parts of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane;

[0057] Modified PET film preparation method:

[0058] S1. Put nano-montmorillonite, dispersant and coupling agent, terephthalic acid and ethylene glycol into the reactor. The temperature of the reactor is 195.6°C and the pressure is 0.36MPa. Chemical reaction obtains polyethylene terephthalate with low degree of polymerization;

[0059] S2. When the temperature of the reactor is 264°C and the pressure is 30.5Pa, the poly(ethylene terephthalate) with a low degree of polymerization undergoes a polycondensation reaction in the nano-montmorillonite. During the polycondensation reaction, t...

Embodiment 3

[0070] see Figure 1-3 Shown, a kind of modified PET film that is used for lithium battery flexible packaging film, this modified PET film is made up of the following components in parts by weight: 78.5 parts of terephthalic acid, 148.5 parts of ethylene glycol, nanometer montmorillonite 20.5 parts, 8.5 parts of polyethylene glycol, 11.5 parts of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane;

[0071] Modified PET film preparation method:

[0072] S1. Put nano-montmorillonite, dispersant and coupling agent, terephthalic acid and ethylene glycol into the reactor. The temperature of the reactor is 195.5°C and the pressure is 0.38MPa. Terephthalic acid and ethylene glycol ester Chemical reaction obtains polyethylene terephthalate with low degree of polymerization;

[0073]S2. When the temperature of the reactor is 262.5°C and the pressure is 35Pa, polyethylene terephthalate with a low degree of polymerization undergoes a polycondensation reaction in the nano-montmorillonite. D...

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Abstract

The invention discloses a modified polyethylene terephthalate (PET) film for a lithium battery flexible packaging film. The modified PET film consists of the following components in parts by weight: 70-80 parts of terephthalic acid, 120-150 parts of ethylene glycol, 10.5-32.4 parts of nano montmorillonite, 0.5-10 parts of a dispersant and 0.1-20 parts of a coupling agent. According to a preparation method of the modified PET film, terephthalic acid and ethylene glycol is subjected to an esterification reaction first to generate polyethylene terephthalate with a low polymerization degree, and then the polyethylene terephthalate with a low polymerization degree is subjected to a polycondensation reaction. In a process of the polycondensation reaction, the nano-montmorillonite is distributedin PET in a lamellar shape under action of the dispersant and the coupling agent to obtain modified PET, and the problem of poor barrier property of a conventional PET film is solved.

Description

technical field [0001] The invention belongs to the technical field of modified polyester, and in particular relates to a modified PET film used for lithium battery flexible packaging films. Background technique [0002] Polyethylene terephthalate is an important engineering plastic, which has excellent physical and mechanical properties in a wide temperature range, and can still maintain excellent electrical insulation properties at high temperature and high frequency. PET materials are widely used in electronics, food, medicine, office supplies, toys and other industries. However, the PET material itself has problems such as poor gas barrier properties, which limit the application of PET materials in many aspects. Therefore, PET materials need to be modified to a certain extent in order to obtain more widely used PET materials. [0003] The main method of modifying plastics is: on the basis of general-purpose plastics and engineering plastics, through filling, blending, r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L71/02C08K9/02C08K9/04C08K3/34C08K5/544C08J5/18C08G63/183F26B5/06
CPCC08J5/18C08G63/183F26B5/06C08K2201/011C08J2367/02C08J2471/02C08K9/02C08K9/08C08K9/04C08K3/346C08K5/544
Inventor 吴磊李汪洋胡伟周正发任凤梅张伟孙晓华徐凤锦刘志强王若愚张德顺郭浩
Owner JIESHOU CITY TIANHONG PACKAGING MATERIAL
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