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Amorphous polyethylene terephthalate composite sheet and production method thereof

A non-crystallization technology of polyethylene terephthalate, which is applied in the production field of composite sheets, can solve the problems of poor thermal stability of polyvinylidene chloride, difficulty of direct processing into sheets, and intensified pyrolysis, etc. Problems, to achieve excellent water vapor barrier, excellent physical and mechanical properties and plastic heat sealability, high gloss effect

Inactive Publication Date: 2010-11-17
HONGDA XINGYE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, polyvinylidene chloride has disadvantages such as poor thermal stability, difficulty in direct processing into sheets, poor transparency, intensified pyrolysis, and high cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] 1. Production of non-crystalline polyethylene terephthalate (APET)

[0034] Using APET particles as raw material, the mass content of polyethylene terephthalate in amorphous polyethylene terephthalate is 94.5%~ 99.1% APET roll sheet, ready for use.

[0035] 2. Use non-crystalline polyethylene terephthalate (APET) sheet as base film to produce composite sheet

[0036] 1. Selection of raw materials:

[0037] The polyvinylidene chloride solution, wherein the polyvinylidene chloride has a solid content of 50% to 60%.

[0038] Polyurethane solution, wherein the solid content of polyurethane is 30%-50%.

[0039] 2. Production steps

[0040] 1) Corona treatment is performed on the non-crystallized polyethylene terephthalate sheet while unwinding at a speed of 70-90m / min;

[0041] 2) coating polyurethane solution on one side of the non-crystallized polyethylene terephthalate sheet;

[0042] 3) drying in an oven at an ambient temperature of 60-75°C to remove the solvent in...

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PUM

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Abstract

The invention discloses an amorphous polyethylene terephthalate composite sheet and a production method thereof, relating to the production technical field of composite sheets. The amorphous polyethylene terephthalate composite sheet treated by corona improves adhesion properties. The production method comprises the following steps of: successively coating a polyurethane solution with a solvent and a polyvinylidene chloride solution on the amorphous polyethylene terephthalate composite sheet, successively baking two times, removing the solvent, cooling, rolling, curing and cutting into sheets in a designed size. The production method has simple and reasonable steps and easy production control. The product integrates the performance advantages of the APET and the PVDC, not only has high transparency, high luster, excellent physical and mechanical performances and plasticity heat sealability, but also has excellent capability of obstructing vapor, oxygen, odor and fragrance.

Description

technical field [0001] The invention relates to the production technical field of composite sheets, in particular to the processing technical field of producing composite sheets based on non-crystallized polyethylene terephthalate. Background technique [0002] Amorphous polyethylene terephthalate (APET) sheet has the advantages of no pollution, no crystal point, high transparency, good finish, strong impact resistance, easy to absorb plastic, and can be widely used in cosmetics, food , electronics, toys, printing and other industries, such as blister, folding boxes, cylinders and other high-end exquisite packaging and various printing windows, and can produce various color materials according to customer requirements. However, the barrier performance of non-crystalline polyethylene terephthalate (APET) sheet is average, the surface is not scratch-resistant, and it is not easy to heat seal. [0003] Polyvinylidene chloride (PVDC) is an ideal packaging material with high bar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/32B32B27/36B05D7/04B05D1/38
Inventor 王礼程肖飞
Owner HONGDA XINGYE CO LTD
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