Bottle grade polyester chip with low acetaldehyde content and preparation method thereof

A polyester chip, low acetaldehyde technology, applied in the field of low acetaldehyde content bottle-grade polyester chips and its preparation, can solve the problems of product transparency decline, compatibility difference, affect taste, etc., to achieve low acetaldehyde generation volume effect
CN101633737AInactive Publication Date: 2010-01-27CHINA RESOURCES PACKAGING MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA RESOURCES PACKAGING MATERIALS CO LTD
Publication Date
2010-01-27
Estimated Expiration
Not applicable · inactive patent
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Abstract

The invention relates to a bottle grade polyester chip with low acetaldehyde content, which is characterized in that in the bottle grade polyester chip, hydroxylated polydiene accounts for 0.1 to 5% of the total weight of the bottle grade polyester chip, polyanhydride chain extender accounts for 0.1 to 5% of the total weight of the bottle grade polyester chip, and transition metal carboxylate accounts for 0.005 to 0.5% of the total weight of the bottle grade polyester chip; under the action of the polyanhydride chain extender, the hydroxylated polydiene is polymerized on the main chain of the polyester; the intrinsic viscosity of the bottle grade polyester chip is 0.8 to 0.9dl / g. The invention also relates to a preparation method of the bottle grade polyester chip with low acetaldehyde content, and has the advantages that the generation amount of acetaldehyde is extremely low in the product processing process, with the content of acetaldehyde being less than 2ppm.
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Description

1. Technical field

[0001] The invention relates to a bottle-grade polyester chip, in particular to a bottle-grade polyester chip with a low acetaldehyde content used for packaging products that requires a high acetaldehyde content and a preparation method thereof. 2. Background technology

[0002] Polyester is a general term for thermoplastic linear saturated polyester represented by polyethylene terephthalate (PET). One of its important uses is in the field of food packaging. As a food packaging material, PET can be made into biaxially stretched packaging film, and can also be made into amorphous preforms and then blown to obtain high-strength, high-transparency stretch blow-molded bottles, and can also be directly extruded into sheets The material is then thermoformed to produce a hollow container. PET products are transparent, oil-resistant, fragrant, hygienic and reliable, and have a wide range of operating temperatures, so their usage in the packaging field continues t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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