Title:
METHOD FOR PREPARING THERMORESISTANT VACUUM-FORMED PLA TABLEWARE
Document Type and Number:
WIPO Patent Application WO/2023/246222
Kind Code:
A1
Abstract:
The present invention relates to the technical field of tablewares, and particularly, to a method for preparing a thermoresistant vacuum-formed PLA tableware. The method comprises the following steps: (1) preparing a sheet from a raw material of the vacuum-formed PLA tableware by means of extrusion via an extruder, and preparing a tableware preform from the sheet by means of vacuum forming, the tableware preform containing PLA that is not completely crystallized; and (2) subjecting the tableware preform to carbon dioxide soaking treatment at constant temperature and pressure to crystallize the uncrystallized PLA in the tableware preform, so as to give a PLA tableware product with a thermal resistance of >100 °C. The vacuum-formed PLA tableware prepared by the method provided herein has the advantages of resistance to high temperatures and thermal deformation and biodegradability, and thus represents a new generation of environment-friendly vacuum-formed tableware products.
Inventors:
LI WENGUANG (US)
LIU YONGLEI (CN)
CHEN QIZAO (CN)
TAO YANG (CN)
HU QIAN (CN)
JIN YUJIE (CN)
HUANG GUOCHAO (CN)
ZHU YUTING (CN)
LIU YONGLEI (CN)
CHEN QIZAO (CN)
TAO YANG (CN)
HU QIAN (CN)
JIN YUJIE (CN)
HUANG GUOCHAO (CN)
ZHU YUTING (CN)
Application Number:
PCT/CN2023/085173
Publication Date:
December 28, 2023
Filing Date:
March 30, 2023
Export Citation:
Assignee:
TAIZHOU CORN ENVIRONMENTAL PROTECTION TECH CO LTD (CN)
International Classes:
C08J9/12; B29C51/10; C08L67/04
Foreign References:
| CN109354847A | 2019-02-19 | |||
| CN102241830A | 2011-11-16 | |||
| JP2008291101A | 2008-12-04 | |||
| CN107556513A | 2018-01-09 | |||
| CN114854079A | 2022-08-05 | |||
| CN114874482A | 2022-08-09 | |||
| CN114986836A | 2022-09-02 | |||
| CN104910596A | 2015-09-16 | |||
| US5670102A | 1997-09-23 | |||
| KR20170054195A | 2017-05-17 |
Other References:
YE JIAN-MIN, ZHU WEN-LI, HUANG HUANG, YAO ZE-HAO: "Crystallization of Polylactide under Supercritical Carbon Dioxide and Its Effects on Cell Structure", CHINA PLASTICS INDUSTRY, vol. 44, no. 10, 1 January 2016 (2016-01-01), pages 64 - 68, 75, XP093118829, ISSN: 1005-5770, DOI: 10.3969/j.issn.1005-5770.2016.10.017
HUANG FENG, LIU WEI, LAI JUN, WU JIANMING, HUANG AN, GENG LIHONG, PENG XIANGFANG: "Enhanced Heat Resistance and Expansion Ratio of Biodegradable Poly (Lactic Acid)/Poly (Butylene Adipate-Co-Terephthalate) Composite Foams via Synergistic Effect of Nucleating Agent and Chain Extension", JOURNAL OF POLYMER ENGINEERING, WALTER DE GRUYTER GMBH, DE, vol. 43, no. 4, 14 March 2023 (2023-03-14), DE , pages 297 - 309, XP009551267, ISSN: 0334-6447, DOI: 10.1515/polyeng-2022-0284
HUANG FENG, LIU WEI, LAI JUN, WU JIANMING, HUANG AN, GENG LIHONG, PENG XIANGFANG: "Enhanced Heat Resistance and Expansion Ratio of Biodegradable Poly (Lactic Acid)/Poly (Butylene Adipate-Co-Terephthalate) Composite Foams via Synergistic Effect of Nucleating Agent and Chain Extension", JOURNAL OF POLYMER ENGINEERING, WALTER DE GRUYTER GMBH, DE, vol. 43, no. 4, 14 March 2023 (2023-03-14), DE , pages 297 - 309, XP009551267, ISSN: 0334-6447, DOI: 10.1515/polyeng-2022-0284
Attorney, Agent or Firm:
LANTIAN INTELLECTUAL PROPERTY AGENCY (CN)
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