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Polyester film, method for preparing same, and method for regenerating polyethylene terephthalate container using same

一种苯二甲酸乙二醇酯、聚酯膜的技术，应用在聚酯膜领域，能够解决塑料容器不均匀收缩等问题，达到优异溶剂粘合强度、优异收缩率、提高品质的效果

Pending Publication Date: 2022-07-22
AISIKAMEVO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since conventional polyester films have fast shrinkage speed and high shrinkage stress, there have been defects caused by uneven shrinkage or distortion of plastic containers

Method used

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  • Polyester film, method for preparing same, and method for regenerating polyethylene terephthalate container using same
  • Polyester film, method for preparing same, and method for regenerating polyethylene terephthalate container using same
  • Polyester film, method for preparing same, and method for regenerating polyethylene terephthalate container using same

Examples

Experimental program
Comparison scheme
Effect test

example

[0179] Preparation of polyester film

example 1-1

[0181] (1) Preparation of copolyester resin

[0182] An autoclave (or first reactor) equipped with a stirrer and a distillation column was charged with 100 mol % of terephthalic acid (TPA) as dicarboxylic acid and 75.6 mol % of ethylene glycol ( EG), 18.8 mole % neopentyl glycol (NPG), and 5.6 mole % diethylene glycol (DEG). 0.07 parts by weight of manganese acetate as a transesterification catalyst was added per 100 parts by weight of the dicarboxylic acid, and then the mixture was heated to 220° C. and methanol produced as a by-product was removed to perform a reaction.

[0183] When the transesterification reaction was completed, 0.07 parts by weight of silica having an average particle diameter of 0.28 μm was added per 100 parts by weight of the dicarboxylic acid, and 0.4 parts by weight of trimethyl phosphate was added as a stabilizer. After 5 minutes, 0.035 parts by weight of antimony trioxide and 0.005 parts by weight of tetrabutyl titanate were added as polymerization c...

example 1-2 to 1-9 and comparative example 1-1 to 1-9

[0188] It was prepared in the same manner as in Example 1-1, except that the contents of dicarboxylic acid and diol, the contents of homopolyethylene terephthalate, and the process conditions were changed as shown in Table 1 below. polyester film.

[0189] The final components of the polyester films prepared in Examples 1-1 to 1-9 and Comparative Examples 1-1 to 1-9 are shown in Table 2 below.

[0190] [Table 1]

[0191]

[0192]

[0193] [Table 2]

[0194]

[0195]

[0196] *NPG: Neopentyl Glycol

[0197] *CHDM: 1,4-cyclohexanedimethanol

[0198] *DEG: Diethylene glycol

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Abstract

Embodiments relate to a polyester film, a method of making the same, and a method of using the same for regenerating a polyethylene terephthalate (PET) container. The polyester film has excellent seam characteristics and recyclability by means of a controllable degree of crystallinity, whereby caking occurs rarely even if it is heat-treated for a long period of time in a regeneration method.

Description

technical field [0001] Embodiments relate to a polyester film, a method for making the same, and a method for regenerating polyethylene terephthalate containers using the same. Specifically, embodiments relate to a polyester film having excellent seaming properties and recyclability by virtue of controlled crystallinity, a method for making the same, and a method for recycling This method of polyester film for polyethylene terephthalate (PET) containers. Background technique [0002] In recent years, heat-shrinkable labels and packaging materials have attracted attention as containers for beverages or food are manufactured in various forms, or there is an increase in the use of complete packaging in order to attract consumers' attention. Such heat-shrinkable labels or packaging take advantage of a polymer film that, once oriented by stretching the polymer film, tends to shrink to stretch it at a temperature or higher the previous shape. In a typical process for heat shrin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08J5/18
CPCC08J5/18C08L67/03B29B17/0052C08J2367/02C08J2467/02C08G63/183C08G63/672C08L67/02C08J11/06B29B17/0026B29B2017/0468B29B17/0412B29K2067/003B29L2031/712B29L2031/744Y02W30/62B29B9/04B29B9/16B29C55/005C08J2367/03
Inventor 梁朱淏金喆奎金龙得
Owner AISIKAMEVO CO LTD
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