Degradable composite plastic sheet

A composite plastic and sheet technology, applied in the direction of synthetic resin layered products, layered products, chemical instruments and methods, etc., can solve the problems of shortened service life of products

Active Publication Date: 2010-06-09
DONGGUAN IUIU HOUSEHOLD PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if plasticized polylactic acid sheets are used directly as tablecloths, table mats, and placemats, they will be hydrolyzed or moldy due to frequent contact with water, soup, and food residues, which will greatly shorten the service life of the products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Polyethylene terephthalate with 1.5 wt% Reverte from WELLS, UK TM The oxidative biodegradable additive was melt-blended to obtain the surface layer material, the polylactic acid and 20wt% polyethylene glycol were melt-blended to obtain the core layer material, and the surface layer material and the core layer material were prepared by a three-layer co-extrusion machine The degradable composite plastic sheet with a thickness of 0.05mm and an overall thickness of 1.0mm has a flexural modulus of 0.61GPa.

Embodiment 2

[0011] Polyethylene terephthalate was melt-blended with 1 wt% of EcoPure G2 oxidative biodegradable additive from Bio-Tec Corporation of the United States to prepare the surface layer material, and polylactic acid and 30 wt% of polyethylene glycol were melt-blended to prepare the core Layer material, surface layer material and core layer material are prepared by three-layer co-extrusion machine to produce a degradable composite plastic sheet with a surface layer thickness of 0.05mm and an overall thickness of 1.6mm, and a flexural modulus of 0.35GPa.

Embodiment 3

[0013] Polyethylene was melt-blended with 3wt% of Reverte BD 92845 oxidative biodegradable additive from WELLS, UK to obtain the surface layer material, and polylactic acid and 40wt% of citrate ester were melt-blended to prepare the core layer material. The surface layer material and the core layer were melt-blended. A degradable composite plastic sheet with a surface layer thickness of 0.01 mm and an overall thickness of 0.6 mm is prepared by a three-layer co-extrusion unit, and the flexural modulus is 0.02 GPa.

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PUM

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Abstract

The invention relates to a degradable composite plastic sheet. The composite plastic sheet is characterized by consisting of an upper polymer surface layer, a lower polymer surface layer and a polylactic acid core layer, wherein each polymer surface layer has the thickness of 0.01-0.02 mm and contains oxidized biodegradable additives; and the polylactic acid core layer is modified by a plasticizer. The integral bending modulus of the sheet is 0.02-1.0GPa. The composite plastic sheet has flexibility, and good waterproof property and anti-mildew property during normal use, and can be completely degraded in the outdoor composting environments after being discarded. The composite plastic sheet can replace the nondegradable soft polyvinyl chloride sheets, and can be used as daily products of tableclothes, dinner pads, table pads and the like.

Description

technical field [0001] The present invention relates to a plastic sheet, more particularly, the present invention relates to a multi-layer composite plastic sheet with soft texture and complete degradability, which belongs to the field of daily-use plastic materials. Background technique [0002] Soft polyvinyl chloride (PVC) sheet is transparent, beautiful, and soft in texture, and has been widely used in the field of daily necessities, such as tablecloths, table mats and placemats. Such PVC daily-use products are easily discarded due to outdated styles or minor damages. Since PVC is a non-degradable polymer material, such thin-type daily-use products are discarded like plastic bags, causing great difficulty for unified classification and recycling. , so they are more of a part of the white pollution dumped in landfills. In recent years, many European and American countries have begun to consider legislation and put forward degradable requirements for imported thin daily n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/18B32B27/22
Inventor 刘承发
Owner DONGGUAN IUIU HOUSEHOLD PROD
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