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Low surface energy polyester film and preparation method and application thereof

A low surface energy, polyester film technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc. Composite and other issues to achieve the effect of meeting food hygiene requirements, simple structure, and low cost

Active Publication Date: 2014-06-25
ORG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyester film mainly considers high temperature transfer and optical properties. The polyester in the raw material is not modified, resulting in too high melting point and relatively fast crystallization speed during processing. Subsequent processing, in addition, both surfaces of the film contain ethylene bis-lauramide or ethylene bis-stearamide, and the film is difficult to compound with other materials
[0006] To sum up, the existing adhesive films on the inner wall of metal canned food packaging all have the defects of canned food safety and hygiene hazards, not easy to dump, and not fastened to the metal base material to varying degrees.

Method used

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  • Low surface energy polyester film and preparation method and application thereof
  • Low surface energy polyester film and preparation method and application thereof
  • Low surface energy polyester film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] figure 1 It is a schematic cross-sectional view of Embodiment 1 of the present invention.

[0060] Such as figure 1 It can be seen that the low surface energy polyester film obtained in this example has a two-layer structure, one of which is a modified polyester layer, and the other layer is a low surface energy polyester layer.

[0061] First, the raw materials are mixed separately to make modified polyester bright slices, inorganic additive slices and low surface energy additive slices, and they are dried on a fluidized bed at a drying temperature of 150°C for 4 hours.

[0062] The modified polyester bright slices include: isophthalic acid modified polyethylene terephthalate (the molar content ratio of isophthalic acid is 10%); the modified polyester bright slices are tested Its melting point is between 210°C and 240°C, and its glass transition temperature is between 60°C and 80°C.

[0063] Inorganic additive chips include: SiO 2 The mass fraction of the powder is...

Embodiment 2

[0072] figure 2 It is a schematic cross-sectional view of Embodiment 2 of the present invention.

[0073] Such as figure 2 It can be seen that the low surface energy polyester film in this embodiment has a three-layer structure, wherein two layers are modified polyester layers, and the other layer is a low surface energy polyester layer.

[0074] First, the raw materials are mixed separately to make modified polyester bright slices, inorganic additive slices and low surface energy additive slices, and they are dried on a fluidized bed at a drying temperature of 150°C for 4 hours.

[0075] The modified polyester bright slices include: isophthalic acid modified polyethylene terephthalate (the molar content ratio of isophthalic acid is 13%); the modified polyester bright slices are tested Its melting point is between 210°C and 240°C.

[0076] Inorganic additive chips include: SiO 2 The mass fraction of the powder is 2000ppm, and the rest is isophthalic acid-modified polyeth...

Embodiment 3

[0084] The low surface energy polyester film of this embodiment has a three-layer structure, wherein two layers are modified polyester layers, and the other layer is a low surface energy polyester layer.

[0085] First, the raw materials are mixed separately to make modified polyester bright slices, inorganic additive slices and low surface energy additive slices, and they are dried on a fluidized bed at a drying temperature of 120°C for 4 hours.

[0086] The modified polyester bright slices include: isophthalic acid modified polyethylene terephthalate (the molar content ratio of isophthalic acid is 16%); the modified polyester bright slices are tested Its melting point is between 200°C and 240°C, and its glass transition temperature is between 60°C and 80°C.

[0087] Inorganic additive chips include: SiO 2 The mass fraction of the powder is 2500ppm, and the rest is isophthalic acid-modified polyethylene terephthalate (the molar ratio of isophthalic acid is 16%).

[0088] Th...

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Abstract

The invention discloses a low surface energy polyester film and a preparation method and application thereof. One side of the low surface energy polyester film is a modified polyester layer, and the other side is a low surface energy polyester layer, wherein the modified polyester layer comprises the following components in percentage by weight: 300 to 5,000ppm of antiblocking agent, and the balance of modified polyester; the low surface energy polyester layer comprises the following components in percentage by weight: 90 to 99.9 percent of modified polyester, 0.1 to 10 percent of low surface energy additive, and 300 to 5,000ppm of antiblocking agent. The low surface energy polyester film is simple in structure, scientific in formula and simple and convenient in preparation method, overcomes lots of defects of the prior art, has the advantages of safety, sanitation, corrosion resistance, no conglutination to packaged contents and tight connection with a metal base material, and can be widely applied to metal can food packing industry.

Description

technical field [0001] The invention relates to film technology, in particular to a low-surface-energy polyester film used in the metal packaging industry for bonding on the surface of a metal substrate, its preparation method and application. Background technique [0002] The metal can food packaging industry requires that the surface of the inner wall in contact with the contents of the package should be below 34 dynes for luncheon meat, fish and tomato sauce, so that the filled contents can be easily dumped. At present, the inner wall of metal cans is mainly coated with paint. After curing, the paint is hard and brittle. The paint has poor ductility and impact resistance. The metal plate coated with it cannot be processed with large deformation, so the deformation is relatively large. The two-piece can is usually sprayed after the metal can is formed, and the spraying process after forming is relatively complicated, resulting in an increase in cost. In addition, although...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/36B32B27/18
Inventor 赵宇晖叶强曾科
Owner ORG TECH CO LTD
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