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Polyester iron-coated film and film-coated metal plate

A metal plate and polyester film technology, which is applied in the field of polyester iron-coated film and film-coated metal plate, to achieve the effect of improving corrosion resistance, improving comprehensive performance, and improving comprehensive performance

Inactive Publication Date: 2020-03-27
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the use of modified polyester film on coated metal sheets for metal packaging can basically meet various molding requirements. However, there are still functional iron-coated films that meet the molding requirements and meet chemical resistance such as acid resistance and alkali resistance. Large space for technical optimization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for producing a polyester iron-coated film. The polyester iron-coated film is manufactured by biaxial stretching at a manufacturing temperature of 250-270°C. The polyester iron-coated film includes 7 parts of copolyester, 3 parts of homopolyester Polyester, the diol in the copolyester is a mixture of ethylene glycol, 1,4-cyclohexanedimethanol, and 1,4-butanediol, and its melting point is 200°C. The iron-coated polyester film is made of Manufactured by three-layer co-extrusion biaxial stretching method, the uniformly mixed copolyester and the homopolyester mixture are divided into upper, middle and lower layers, and the copolyester contains 1300ppm of SiO 2 .

[0028] The prepared biaxially stretched polyester film is thermally pasted on the surface of a thin metal plate with a thickness of 0.10 to 0.50 mm at a pressure of 2 to 10 kg and a temperature of 180 to 260° C. to obtain a coated metal plate.

Embodiment 2

[0030] A method for producing a polyester iron-coated film. The polyester iron-coated film is manufactured by biaxial stretching at a manufacturing temperature of 250-270°C. The polyester iron-coated film includes 5 parts of copolyester, 5 parts of homopolyester Polyester, the diol in the copolyester is a mixture of ethylene glycol, 1,4-cyclohexanedimethanol, and 1,4-butanediol, and its melting point is 230°C. The iron-coated polyester film is made of Manufactured by three-layer co-extrusion biaxial stretching method, the uniformly mixed copolyester and the homopolyester mixture are divided into upper, middle and lower layers, and the copolyester contains 2000ppm of SiO 2 .

[0031] The prepared biaxially stretched polyester film is thermally pasted on the surface of a thin metal plate with a thickness of 0.10 to 0.50 mm at a pressure of 2 to 10 kg and a temperature of 180 to 260° C. to obtain a coated metal plate.

Embodiment 3

[0033] A method for producing a polyester iron-coated film. The polyester iron-coated film is manufactured by biaxial stretching at a manufacturing temperature of 250-270°C. The polyester iron-coated film includes 8 parts of copolyester, 2 parts of homopolyester Polyester, the diol in the copolyester is a mixture of ethylene glycol, 1,4-cyclohexanedimethanol, and 1,4-butanediol, and its melting point is 240°C. The iron-coated polyester film is made of Manufactured by three-layer co-extrusion biaxial stretching method, the uniformly mixed copolyester and the homopolyester mixture are divided into upper, middle and lower layers, and the copolyester contains 800ppm of SiO 2 .

[0034] The prepared biaxially stretched polyester film is thermally pasted on the surface of a thin metal plate with a thickness of 0.10 to 0.50 mm at a pressure of 2 to 10 kg and a temperature of 180 to 260° C. to obtain a coated metal plate.

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Abstract

The invention discloses a blended polyester film, which is prepared from a copolymerized polyester and a homopolymerized polyester, and comprises an upper layer, a middle layer and a lower layer, eachlayer is a mixture formed by uniformly mixing the copolymerized polyester and the homopolymerized polyester, the copolymerized polyester comprises 800-2000 ppm by mass of SiO2 added through in-situ polymerization, the diol components in the copolymerized polyester comprise ethylene glycol, 1,4-cyclohexanedimethanol and 1,4-butanediol, a part ratio of the copolymerized polyester to the homopolymerized polyester is 8:2, 7:3 and 5:5 respectively, and the melting point of the copolymerized polyester is 200-240 DEG C. According to the invention, the blended polyester film has advantages of excellent processability, excellent chemical resistance such as acid resistance, alkali resistance and the like, and excellent uniformity; and the film-coated metal plate prepared from the blended polyesterfilm can meet the performance requirements of complex forming processing and high-corrosion-resistance metal containers for food and beverage packaging at the same time.

Description

technical field [0001] The invention relates to the field of film-coated metal plates for metal packaging, and more specifically refers to a polyester iron-coated film and a film-coated metal plate. Background technique [0002] In recent years, the polyethylene terephthalate (polyester) industry has developed very rapidly. There are a large number of well-known companies producing polyester materials and polyester equipment at home and abroad. In 1987, the world output of polyester has leapt to the engineering The fifth place in plastics, film is an important branch in the application field of polyester materials, and is widely used in the packaging field of food and beverages. In recent years, due to the rise of metal coating technology, the combination of iron coating and metal plate through hot-melt lamination has overcome the harmful substances that must be painted on the inside of traditional metal tanks - bisphenol A (Bis-phenol A) precipitation problem, and this pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/09B32B15/18B32B27/36C08L67/00C08J5/18C08G63/78C08K3/36B65D65/40B32B1/00
CPCB32B15/09B32B15/18B32B27/36C08J5/18C08G63/78C08K3/36B65D65/40C08J2367/00C08J2467/00C08L67/02B32B2250/03B32B2250/244B32B2270/00B32B2307/518B32B2307/732B32B2439/00B32B2307/50B32B27/18B32B2250/04B32B2307/714B32B2307/30B32B2439/70B32B2255/205B32B2307/752B32B2307/704B32B2255/06B32B2264/102B32B27/08B32B1/00B29C55/023B29C55/12B29K2067/003B29L2007/008B29L2031/712B32B37/06C08L2203/16C08L2205/025
Inventor 谢龙陈红星戴竞舸
Owner BAOSHAN IRON & STEEL CO LTD