Two-way stretch polyester film for compounding tinned sheet and preparation method of two-way stretch polyester film

A biaxially stretched polyester and tin-plated sheet technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problem of elongation at break, thermal stability of heat sealing performance, etc. problems, to avoid the problem of chemical glue migration, to improve the effect of heat setting, and to achieve the effect of high fastness

Active Publication Date: 2016-11-23
ANHUI GUOFENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The can body and bottom of the two-piece can are connected as one, and it is made by impact. Its production speed is fast and the production capacity is large, but it puts forward higher requirements for the elongation at break of the PET film attached to the can body.
However, ordinary PET films cannot meet the requirements in terms of elongation at break, heat sealing performance, and thermal stability.

Method used

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  • Two-way stretch polyester film for compounding tinned sheet and preparation method of two-way stretch polyester film
  • Two-way stretch polyester film for compounding tinned sheet and preparation method of two-way stretch polyester film
  • Two-way stretch polyester film for compounding tinned sheet and preparation method of two-way stretch polyester film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The upper surface layer is composed of polyester chips and polyester anti-adhesive agent, and the proportion of polyester anti-adhesive agent is 0.2% by weight percentage, and the balance is polyester chips; the lower surface layer is composed of PETG chips and polyester anti-adhesive agent, wherein The polyester anti-adhesive agent content is 0.2%, and the balance is PETG chips; the core layer is composed of copolymerized polypropylene chips, polyester chips and vinyl-terminated polyester, of which 5% is copolymerized polypropylene chips, vinyl-terminated polyester The content is 5%, and the balance is polyester chips.

[0040] The film is carried out as follows:

[0041] (1) Dry the polyester chips through a fluidized bed at 140-160°C for at least 20 minutes, and then dry them in a drying tower at 140-160°C for 2-6 hours;

[0042](2) drying the copolymerized polypropylene slices at 30-90°C for 2-2.5 hours;

[0043] (3) Mix the dried polyester chips, copolymerized po...

Embodiment 2

[0053] The upper surface layer is composed of polyester chips and polyester anti-adhesive agent, and the proportion of polyester anti-adhesive agent is 0.2% by weight percentage, and the balance is polyester chips; the lower surface layer is composed of PETG chips and polyester anti-adhesive agent, wherein The content of polyester anti-adhesive agent is 0.2%, and the balance is PETG chips; the core layer is composed of copolymerized polypropylene, vinyl-terminated polyester and polyester chips, of which the content of copolymerized polypropylene is 10%, and the content of vinyl-terminated polyester is 0.5%, and the balance is polyester chips.

[0054] Its production method is the same with embodiment 1.

Embodiment 3

[0056] The upper surface layer is composed of polyester chips and polyester anti-adhesive agent, and the proportion of polyester anti-adhesive agent is 0.2% by weight percentage, and the balance is polyester chips; the lower surface layer is composed of PETG chips and polyester anti-adhesive agent, wherein The polyester anti-sticking agent content is 0.2%, and the balance is PETG chips; the core layer is composed of copolymerized polypropylene chips, vinyl-terminated polyester and polyester chips, of which copolymerized polypropylene chips are 15%, vinyl-terminated polyester The content is 2%, and the balance is polyester chips.

[0057] Its production method is the same with embodiment 1.

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Abstract

The invention discloses a two-way stretch polyester film for compounding a tinned sheet and a preparation method of the two-way stretch polyester film. The film is composed of an upper surface layer, a core layer and a lower surface layer. The core layer is formed by mixing polyester chips, copolymerized polypropylene chips and vinyl-capped polyester, wherein the content of copolymerized polypropylene chips is 10-25 wt%, and the content of vinyl-capped polyester is 0.5-5 wt%. The upper surface layer is composed of polyester chips and polyester antisticking agent, wherein the content of polyester antisticking agent is 0.10-0.50 wt%. The lower surface layer is composed of PETG and polyester antisticking agent, wherein the content of polyester antisticking agent is 0.10-0.5 wt%. The two-way stretch polyester film for compounding the tinned sheet is prepared through a three-layer co-extrusion and two-way stretch process. The product has the advantages of being large in elongation at break, resistant to impact, high in thermal stability, capable of being heat sealed and the like, and is mainly compounded with the thinned sheet and used for the can making field.

Description

technical field [0001] The invention relates to the field of film technology, in particular to a biaxially stretched polyester film for compounding tinned sheets and a preparation method thereof. Background technique [0002] Biaxially oriented polyester film is a kind of packaging film with relatively comprehensive performance. It has the characteristics of good transparency, high gloss, high tensile strength, high stiffness, moderate elongation at break and good dimensional stability. Heat resistance, cold resistance and good chemical resistance, etc., suitable for printing, packaging, aluminum plating and other fields. However, with the rapid development of the plastic film field, people have higher and higher requirements for the performance of the film. At present, the market for biaxially oriented polyester film for general packaging has exceeded demand, but there is still a lack of high-end products in some special fields, such as Biaxially oriented polyester film fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/06B32B27/36
CPCB32B27/08B32B27/36
Inventor 施中华
Owner ANHUI GUOFENG PLASTIC
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