Title:
THERMORESISTANT PLA KNIFE/FORK/SPOON AND METHOD FOR PREPARING SAME
Document Type and Number:
WIPO Patent Application WO/2023/246221
Kind Code:
A1
Abstract:
The present invention relates to the technical field of tablewares, and particularly, to a method for preparing a thermoresistant PLA knife/fork/spoon. The method comprises the following steps: (1) preparing a knife/fork/spoon preform from a PLA knife/fork/spoon raw material by means of injection molding via an injection molding machine, the knife/fork/spoon preform containing PLA that is not completely crystallized; and (2) subjecting the knife/fork/spoon preform to carbon dioxide soaking treatment at constant temperature and pressure to crystallize the uncrystallized PLA in the knife/fork/spoon preform, so as to give a PLA knife/fork/spoon product with a thermal resistance of ≥65°C. The present invention further provides a thermoresistant PLA knife/fork/spoon. The knife/fork/spoon is a microfoaming product with a density reduced by 5% to 30% relative to the knife/fork/spoon preform and a thermal resistance of 65 °C or above. The thermoresistant PLA knife/fork/spoon provided herein has the advantages of resistance to high temperatures, bending and embrittlement and biodegradability, and thus represents a new generation of environment-friendly knife/fork/spoon 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/CN2023/085163
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; B29C45/00; C08J9/18; C08L67/02; C08L67/04
Domestic Patent References:
| WO2018040624A1 | 2018-03-08 |
Foreign References:
| CN109354847A | 2019-02-19 | |||
| CN102241830A | 2011-11-16 | |||
| CN114854079A | 2022-08-05 | |||
| CN114874482A | 2022-08-09 | |||
| CN114986836A | 2022-09-02 | |||
| CN109776848A | 2019-05-21 | |||
| CN104277237A | 2015-01-14 | |||
| CN111040403A | 2020-04-21 | |||
| CN112778726A | 2021-05-11 | |||
| US20150240044A1 | 2015-08-27 | |||
| TW201425399A | 2014-07-01 | |||
| US20220161467A1 | 2022-05-26 |
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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