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Polyester thin film used for being directly thermal-compounded with metal surface and preparation method of same

A polyester film, metal surface technology, applied in the field of polyester film, can solve the problems of difficult metal surface bonding, difficult to have lasting surface tension of polyester film, etc., and achieve the effects of low cost, easy printing, and good barrier properties

Active Publication Date: 2016-10-05
BAOSHAN IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the polyester film is difficult to have persistent surface tension without surface treatment and is not easy to bond with the metal surface, the purpose of the present invention is to provide a polyester film for direct thermal lamination with the metal surface and its preparation method, The polyester film has high temperature non-deformation, good barrier properties, corrosion resistance, easy printing, long-lasting surface tension and has the ability to adhere to the metal surface and is not easy to fall off, no precipitation at high temperature, no pollution to the content, no adhesion, safety and hygiene, etc.

Method used

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  • Polyester thin film used for being directly thermal-compounded with metal surface and preparation method of same

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The experiment was carried out in a 10L reactor, and terephthalic acid, isophthalic acid, and ethylene glycol were added to the In the reactor, add catalyst, 1,4-cyclohexanedimethanol and dimethyl isophthalate-5-sodium sulfonate, antimony trioxide (molar content is 80ppm) is catalyst, wherein 1,4- The molar content of cyclohexanedimethanol is 3.5%, and the molar content of dimethyl-5-sodium isophthalate-5-sulfonate is 0.01%, and N2 is used as a protective gas, and the temperature is raised with stirring under a gas pressure of 0.1 MPa. Control the temperature at 185°C. After about two hours, when the esterification water is significantly reduced, release the pressure to normal pressure to complete the esterification reaction. Next, the temperature is raised and the pressure is lowered. The temperature in the reactor is raised to 280°C, and the pressure drops to 100 Pa to start vacuum polycondensation. The polycondensation takes 1.8 hours to obtain a polyester melt, whic...

Embodiment 2

[0038] The experiment was carried out in a 10L reactor. Terephthalic acid, isophthalic acid, and ethylene glycol were added to the In the reactor, add catalyst and isophthalic acid-5-sodium sulfonate, antimony trioxide (molar content is 40ppm), titanate (molar content is 3ppm) are catalyst, wherein isophthalic acid-5- The molar content of sodium sulfonate is 3.8%, with N 2 Substitution, stirring and heating under a gas pressure of 0.1MPa. Control the temperature at 175°C, and after about 1.5 hours, when the water to be esterified decreases significantly, release the pressure to normal pressure to complete the esterification reaction. Next, the temperature is raised and the pressure is lowered. The temperature in the reactor is raised to 280°C, and the pressure drops to 100 Pa to start vacuum polycondensation. The polycondensation takes 1.8 hours to obtain a polyester melt, which is cooled in a water tank and pelletized to obtain a chemically modified polyester. The titanate ...

Embodiment 3

[0041] The experiment was carried out in a 10L reactor, and terephthalic acid, isophthalic acid, and ethylene glycol were added to the In the reactor, add catalyst and trimellitic acid and isophthalic acid-5-sodium sulfonate again, antimony trioxide (molar content is 40ppm), titanate (molar content is 3ppm) is catalyst, wherein The total molar content of triformic acid and isophthalic acid-5-sodium sulfonate is 2.5%, replaced with N2, stirred and heated under a gas pressure of 0.1 MPa. Control the temperature at 175°C, and after about 1.4 hours, when the water to be esterified decreases significantly, release the pressure to normal pressure to complete the esterification reaction. Next, the temperature is raised and the pressure is lowered. The temperature in the reactor is raised to 270°C, and the pressure drops to 100 Pa to start vacuum polycondensation. The polycondensation takes 1.8 hours to obtain a polyester melt, which is cooled in a water tank and pelletized to obtain ...

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Abstract

The invention belongs to the technical field of polyester thin films and provides a polyester thin film used for being directly thermal-compounded with a metal surface and a preparation method of the same. The polyester thin film is prepared by copolymerizing terephthalic acid, isophthalic acid, ethylene glycol and a fourth component and bidirectionally stretching the co-polymer, wherein the molar ratio of the terephthalic acid, the ethylene glycol, the isophthalic acid to the fourth component is 135-165:148-194:11-15:0.01-12. The fourth component is selected from one or more of isophthalic-5-sulfonate, 1,4-cyclohexane dimethanol, neo-pentanediol and trimellitic acid. The polyester thin film is free of high temperature deformation, has good insulation property, is corrosion resistant, is easy to print, has a durable surface tension force and is not liable to strip off when being laminated with the metal surface, is free of escaped substances at high temperature and has no pollution on content, is free of adhesion and is safe and sanitary.

Description

technical field [0001] The invention belongs to the technical field of polyester film, and relates to a biaxially stretched polyester film that can be attached to a metal surface in the metal packaging industry, and in particular to a polyester film with durable high surface tension that is directly thermally compounded with a metal surface. Ester film and its preparation method. Background technique [0002] In recent years, the polyethylene terephthalate (PET) industry has developed very rapidly. There are a large number of well-known companies producing PET materials and PET equipment at home and abroad. In 1987, the world output of PET has leapt to the fifth place in engineering plastics. bit. From the molecular chain structure of PET, it can be seen that the PET molecular chain is a linear macromolecule composed of many rigid benzene rings and its conjugated carbonyl groups, as well as flexible carbon-oxygen bonds and carbon-carbon bonds. PET itself should have good me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08G63/688B29C51/46B29C69/02
Inventor 谢龙丁丽萍陈红星白永平
Owner BAOSHAN IRON & STEEL CO LTD
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