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A kind of high barrier water vapor polyester film and preparation method thereof

A technology of polyester film and water vapor, applied in the field of polyester film, can solve the problems of poor water vapor barrier performance of PET film, achieve the effect of reducing free volume and improving barrier property

Active Publication Date: 2022-03-18
JIANGSU HENGLI CHEM FIBER
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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 solve the problem of poor water vapor barrier properties of PET films in the prior art, to provide a high water vapor barrier polyester film and its preparation method

Method used

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  • A kind of high barrier water vapor polyester film and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A kind of preparation method of high barrier water vapor polyester film, concrete steps are as follows:

[0045] (1) preparation of modified polyester;

[0046] (1.1) Esterification reaction;

[0047] Prepare a slurry of terephthalic acid, ethylene glycol and 2,5-pyridinedicarboxylic acid with a molar ratio of 1:1.3:0.08, add nickel chloride and catalyst (antimony trioxide) and mix evenly. The amount of catalyst added is 0.02wt% of the addition of terephthalic acid; the addition of nickel chloride is 54mol% of the addition of 2,5-pyridinedicarboxylic acid; then the esterification reaction is carried out under pressure in a nitrogen atmosphere, and the pressurization pressure is 0.3MPa. The temperature of the esterification reaction is 250°C, and the termination condition of the esterification reaction is: the distilled amount of water in the esterification reaction reaches 90% of the theoretical value;

[0048] (1.2) polycondensation reaction;

[0049]After the ester...

Embodiment 2

[0061] A kind of preparation method of high barrier water vapor polyester film, concrete steps are as follows:

[0062] (1) preparation of modified polyester;

[0063] (1.1) Esterification reaction;

[0064] Prepare a slurry of terephthalic acid, ethylene glycol and 2,5-pyridinedicarboxylic acid with a molar ratio of 1:1.3:0.09, add nickel chloride and catalyst (antimony trioxide) and mix evenly. The amount of catalyst added is 0.02wt% of the addition of terephthalic acid; the addition of nickel chloride is 56mol% of the addition of 2,5-pyridinedicarboxylic acid; then the esterification reaction is carried out under pressure in a nitrogen atmosphere, and the pressurization pressure is 0.3MPa, The temperature of the esterification reaction is 256°C, and the termination condition of the esterification reaction is: the amount of water distilled in the esterification reaction reaches 96% of the theoretical value;

[0065] (1.2) polycondensation reaction;

[0066] After the este...

Embodiment 3

[0078] A kind of preparation method of high barrier water vapor polyester film, concrete steps are as follows:

[0079] (1) preparation of modified polyester;

[0080] (1.1) Esterification reaction;

[0081] Prepare a slurry of terephthalic acid, ethylene glycol and 2,5-pyridinedicarboxylic acid with a molar ratio of 1:1.3:0.10, add nickel chloride and catalyst (antimony trioxide) and mix evenly. The amount of catalyst added is 0.02wt% of the addition of terephthalic acid; the addition of nickel chloride is 50mol% of the addition of 2,5-pyridinedicarboxylic acid; then the esterification reaction is carried out under pressure in a nitrogen atmosphere, and the pressurization pressure is 0.2MPa, The temperature of the esterification reaction is 258°C, and the termination condition of the esterification reaction is: the amount of water distilled in the esterification reaction reaches 97% of the theoretical value;

[0082] (1.2) polycondensation reaction;

[0083] After the este...

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Abstract

The invention relates to a high-barrier water-vapor polyester film and a preparation method thereof. A high-barrier water-vapor polyester film is prepared from modified polyester according to a film-making process; the preparation method of the modified polyester is as follows: adding terephthalic acid , ethylene glycol, 2,5-pyridinedicarboxylic acid and nickel chloride are uniformly mixed, and then esterification reaction and polycondensation reaction are carried out successively to obtain modified polyester; the obtained polyester segment includes terephthalic acid segment, ethylene dicarboxylic acid segment Alcohol segment and 2,5-pyridinedicarboxylic acid segment, and between 2,5-pyridinedicarboxylic acid segments of different polyester segments via Ni 2+ Coordination; the molar ratio of the terephthalic acid segment to the 2,5-pyridinedicarboxylic acid segment is 1:0.08~0.10; the 2,5-pyridinedicarboxylic acid segment participates in the coordination with an O atom on the carbonyl and N atom on pyridine. The present invention adopts Ni 2+ Coordination with 2,5-pyridinedicarboxylic acid reduces the free volume, which improves the water vapor barrier properties of the polyester film, and the water vapor transmission rate of the high barrier water vapor polyester film at 38°C and 90% relative humidity ≤1.0g / (m 2 d).

Description

technical field [0001] The invention belongs to the technical field of polyester films, and relates to a polyester film with high barrier water vapor and a preparation method thereof. Background technique [0002] Polyester film is an important product of polyester in the non-fiber field. At present, they mainly refer to the film form made of polyethylene terephthalate polymer in the polyester family. After biaxial stretching A high-grade plastic film with excellent performance is produced, which has high tensile strength, good stiffness, anti-burning, not easy to break, excellent electrical and optical properties, good oxygen resistance, moisture resistance, and cold resistance (-70°C) And heat resistance (200 ℃), and has excellent characteristics such as chemical corrosion resistance and shrinkage stability. Polyester film is mainly used in electrical, insulation, packaging, magnet containers, films, etc., and its application range is very wide. In my country, polyester ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/685C08G63/68C08J5/18C08L67/02
CPCC08G63/6856C08G63/681C08J5/18C08J2367/02
Inventor 王山水郁秀峰陈瑞杨超明吴亚英孙晓华
Owner JIANGSU HENGLI CHEM FIBER
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