Title:
BIODEGRADABLE AND WATERPROOF SHAPED ARTICLES BASED ON THERMOPLASTIC STARCH WITH LOWER RETROGRADATION AND IMPROVED MECHANICAL PROPERTIES
Document Type and Number:
WIPO Patent Application WO/2023/237996
Kind Code:
A1
Abstract:
The invention relates to a method for producing a biodegradable thermoplastic starch-based article intended to come into contact with foodstuffs. In this method, the semi-crystalline starch granules are transformed into a homogeneous and almost amorphous material, called thermoplastic starch, by the addition of plasticizers at high temperatures and under shear. Thermoplastic starch is modified with organic acid during melt processing to prevent the retrogradation of starch. Moreover, cellulose derivatives are used as the reinforcement filler of thermoplastic starch. The article is produced using hot-pressing and then coating by immersion in a waterproofing solution.
Inventors:
BAHARI SEYED FARSHID (IR)
VANDERBEKEN MARC (CA)
AZIZI VAHIDEH (IR)
VANDERBEKEN MARC (CA)
AZIZI VAHIDEH (IR)
Application Number:
PCT/IB2023/055732
Publication Date:
December 14, 2023
Filing Date:
June 03, 2023
Export Citation:
Assignee:
BAHARI SEYED FARSHID (IR)
International Classes:
C08J3/09; B29C43/00; B65D65/46; C08J3/18; C08J7/04
Other References:
SHAHMALEKI MOSTAFA, FARANAK BEIGMOHAMMADI, FARNAZ MOVAHEDI: "نOptimizing the Production of Thermoplastic Starch using Cellulose Filler", JOURNAL OF FOOD RESEARCH, vol. 31, no. 4, 1 January 2021 (2021-01-01), pages 97 - 113, XP093116862, DOI: 10.22034/FR.2021.41207.1755
CHANG QINGLU, HAO YANLING, CHENG LONG, LIU YIHAO, QU AOYUN: "Preparation and performance evaluation of biodegradable corn starch film using poly (lactic acid) as waterproof coating", SURFACE ENGINEERING., INSTITUT OF MATERIALS, LONDON., GB, vol. 36, no. 6, 2 June 2020 (2020-06-02), GB , pages 665 - 670, XP093116865, ISSN: 0267-0844, DOI: 10.1080/02670844.2019.1664086
JIUGAO, Y. ET AL.: "The Effects of Citric Acid on the Properties of Thermoplastic Starch Plasticized by Glycerol", STARCH/STARKE, vol. 57, 2005, pages 494 - 504, XP001520729, DOI: https://doi.org/10.1002/star.200500423
SOUZA ROBERTA C.R., ANDRADE CRISTINA T.: "Processing and properties of thermoplastic starch and its blends with sodium alginate", J. APPL. POLYM. SCI., vol. 81, 1 January 2001 (2001-01-01), pages 412 - 420, XP093116869, DOI: 10.1002/app.1453
CHANG QINGLU, HAO YANLING, CHENG LONG, LIU YIHAO, QU AOYUN: "Preparation and performance evaluation of biodegradable corn starch film using poly (lactic acid) as waterproof coating", SURFACE ENGINEERING., INSTITUT OF MATERIALS, LONDON., GB, vol. 36, no. 6, 2 June 2020 (2020-06-02), GB , pages 665 - 670, XP093116865, ISSN: 0267-0844, DOI: 10.1080/02670844.2019.1664086
JIUGAO, Y. ET AL.: "The Effects of Citric Acid on the Properties of Thermoplastic Starch Plasticized by Glycerol", STARCH/STARKE, vol. 57, 2005, pages 494 - 504, XP001520729, DOI: https://doi.org/10.1002/star.200500423
SOUZA ROBERTA C.R., ANDRADE CRISTINA T.: "Processing and properties of thermoplastic starch and its blends with sodium alginate", J. APPL. POLYM. SCI., vol. 81, 1 January 2001 (2001-01-01), pages 412 - 420, XP093116869, DOI: 10.1002/app.1453
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