WO2022027602A1 - 多层可生物降解薄膜及其制备方法 - Google Patents
多层可生物降解薄膜及其制备方法 Download PDFInfo
- Publication number
- WO2022027602A1 WO2022027602A1 PCT/CN2020/107846 CN2020107846W WO2022027602A1 WO 2022027602 A1 WO2022027602 A1 WO 2022027602A1 CN 2020107846 W CN2020107846 W CN 2020107846W WO 2022027602 A1 WO2022027602 A1 WO 2022027602A1
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- WO
- WIPO (PCT)
- Prior art keywords
- layer
- parts
- biodegradable film
- starch
- film
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/02—Starch; Degradation products thereof, e.g. dextrin
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
Definitions
- the invention relates to a multi-layer biodegradable film and a preparation method thereof, belonging to the field of biodegradable plastics.
- Biodegradable resins are very important for buffering the impact of white pollution on the earth.
- Polyvinyl alcohol (PVA) is a water-soluble polymer with water solubility and biodegradability, and is increasingly used in film packaging materials.
- the mixture of PVA/starch has high cost performance and moderate
- the mechanical strength of biodegradable materials is currently a research hotspot of biodegradable materials.
- PVA/starch film has good water solubility and excellent gas barrier properties to oxygen and nitrogen, but due to the presence of a large number of hydroxyl groups in the side chain of PVA/starch, it has hygroscopicity and poor moisture resistance, resulting in limited use environment .
- PBAT is a copolymer of butylene adipate and butylene terephthalate. It has both the characteristics of PBA and PBT, and has good ductility and elongation at break, as well as good heat resistance. and impact performance; in addition, it also has excellent biodegradability, which is very active in the research of biodegradable plastics and one of the best biodegradable materials in the market.
- PHA Polyhydroxyalkanoates
- the purpose of the present invention is to provide a multi-layer biodegradable film, which has both good air tightness and good waterproof effect.
- a multi-layer biodegradable film which is composed of a surface layer, a core layer and an inner layer, is characterized in that: the composition ratio of the core layer is: 100 parts of PVA, 60-100 parts of starch, 30-42 parts of plasticizer, 0.4-1.0 part of chemical modifier, 0.2-0.6 part of chain extender; the composition ratio of the surface layer and the inner layer is: 100 parts of PBAT, 30-50 parts of PHA, and 1-3 parts of lubricant.
- the starch is hydroxypropyl starch.
- the plasticizer is glycerin or epoxidized soybean oil.
- the chemical modifier is citric acid.
- the lubricant is oleic acid amide.
- the present invention also discloses a method for preparing the above-mentioned multilayer biodegradable film, the steps of which include:
- plasticizer Add a part of plasticizer to PVA, stir at high speed, dry, add the rest of plasticizer, chemical modifier and chain extender to starch, stir at high speed, dry, and then send the two into the mixer for mixing sent to twin-screw extruder for granulation;
- B. PBAT, PHA and lubricant are sent to the mixer for mixing and then sent to the twin-screw extruder for granulation;
- the surface layer, core layer and inner layer masterbatch are made into biodegradable film by three-layer co-extrusion blow molding process.
- the material extrusion speed of the three extruders is 0.5:1.5:0.5, and the processing temperature is 200 °C , the screw speed is 60rpm, and the film pulling speed is 45m/min.
- a layer of film with good water barrier is attached inside and outside the PVA/starch film with good air tightness, and the obtained film has both good air tightness and water resistance, and can be Completely biodegradable and environmentally friendly, it is especially suitable for food packaging.
- the multi-layer biodegradable film is composed of a surface layer, a core layer and an inner layer.
- the composition ratio of the core layer is: 100 parts of PVA, 80 parts of hydroxypropyl starch, 40 parts of glycerin, 0.8 parts of citric acid, and isocyanates 0.5 part of chain agent; the component proportions of the surface layer and the inner layer are: 100 parts of PBAT, 40 parts of PHA, and 2 parts of lubricant oleic acid amide.
- the multi-layer biodegradable film is composed of a surface layer, a core layer and an inner layer.
- the composition ratio of the core layer is: 100 parts of PVA, 60 parts of hydroxypropyl starch, 30 parts of epoxidized soybean oil, 0.4 parts of citric acid, 0.2 part of isocyanate chain extender;
- the composition ratio of the surface layer and the inner layer is: 100 parts of PBAT, 30 parts of PHA, and 1 part of lubricant oleic acid amide.
- the multi-layer biodegradable film is composed of a surface layer, a core layer and an inner layer, and is characterized in that: the composition ratio of the core layer is: 100 parts of PVA, 100 parts of hydroxypropyl starch, 42 parts of glycerin, and 1.0 part of citric acid , 0.2-0.6 part of isocyanate chain extender; the composition ratio of the surface layer and the inner layer is: 100 parts of PBAT, 50 parts of PHA, and 3 parts of lubricant oleic acid amide.
- the preparation method of the multi-layer biodegradable film in the embodiment 1-3, its steps include:
- B. PBAT, PHA and lubricant are sent to the mixer for mixing and then sent to the twin-screw extruder for granulation;
- the surface layer, core layer and inner layer masterbatch are made into biodegradable film by three-layer co-extrusion blow molding process.
- the material extrusion speed of the three extruders is 0.5:1.5:0.5, and the processing temperature is 200 °C , the screw speed is 60rpm, the film pulling speed is 45m/min, and the film thickness is 0.03mm.
- the prepared film has good air tightness and water resistance, and can be completely biodegraded, and is especially suitable for use as a food packaging bag.
Landscapes
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
Description
Claims (7)
- 一种多层可生物降解薄膜,由表层、芯层和里层组成,其特征在于:所述芯层的组分配比为:PVA 100份、淀粉60-100份、增塑剂30-42份、化学改性剂0.4-1.0份、扩链剂0.2-0.6份;所述表层和里层的组分配比为:PBAT 100份、PHA 30-50份、润滑剂1-3份。
- 根据权利要求1所述的多层可生物降解薄膜,其特征在于:所述淀粉为羟丙基淀粉。
- 根据权利要求2所述的多层可生物降解薄膜,其特征在于:所述增塑剂为甘油或环氧大豆油。
- 根据权利要求3所述的多层可生物降解薄膜,其特征在于:所述化学改性剂为柠檬酸。
- 根据权利要求4所述的多层可生物降解薄膜,其特征在于:所述润滑剂为油酸酰胺。
- 权利要求1-5中任一项所述的多层可生物降解薄膜的制备方法,其步骤包括:A、在PVA中加入一部分增塑剂,高速搅拌,干燥,在淀粉中加入其余增塑剂和化学改性剂、扩链剂,高速搅拌,干燥,然后将两者送入混料机混合后送入双螺杆挤压机造粒;B、将PBAT、PHA、润滑剂送入混料机混合后送入双螺杆挤压机造粒;C、将表层、芯层和里层母粒采用三层共挤吹塑成型工艺制成可生物降解薄膜,三台挤出机的物料挤出速度为0.5:1.5:0.5,加工温度为200℃,螺杆转速为60rpm,薄膜牵引速度为45m/min。
- 根据权利要求6所述的多层可生物降解薄膜的制备方法,其特征在于:步骤A中高速搅拌的速度为800rpm,时间为25分钟。
Priority Applications (2)
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AU2020227132A AU2020227132A1 (en) | 2020-08-07 | 2020-08-07 | Multilayer biodegradable thin film and preparation method thereof |
PCT/CN2020/107846 WO2022027602A1 (zh) | 2020-08-07 | 2020-08-07 | 多层可生物降解薄膜及其制备方法 |
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PCT/CN2020/107846 WO2022027602A1 (zh) | 2020-08-07 | 2020-08-07 | 多层可生物降解薄膜及其制备方法 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114851672A (zh) * | 2022-07-07 | 2022-08-05 | 山东兰德英科新材料科技有限公司 | 采用可生物降解输液袋专用料制备输液袋的方法 |
CN116144147A (zh) * | 2022-12-22 | 2023-05-23 | 四川大学 | 环境友好型复合材料及其制备方法 |
Families Citing this family (1)
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CN115057107B (zh) * | 2022-08-02 | 2023-07-04 | 山西农业大学 | 一种果蔬保鲜膜及其制备方法 |
Citations (3)
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CN107513180A (zh) * | 2016-06-16 | 2017-12-26 | 江南大学 | 一种淀粉/聚乙烯醇复合材料及制备方法 |
CN110626038A (zh) * | 2019-09-27 | 2019-12-31 | 广东崇熙环保科技有限公司 | 生物降解膜及其制造方法 |
EP3636434A1 (en) * | 2018-10-09 | 2020-04-15 | Flexopack S.A. | Thin film for waste packing |
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2020
- 2020-08-07 WO PCT/CN2020/107846 patent/WO2022027602A1/zh active Application Filing
- 2020-08-07 AU AU2020227132A patent/AU2020227132A1/en active Pending
Patent Citations (3)
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CN107513180A (zh) * | 2016-06-16 | 2017-12-26 | 江南大学 | 一种淀粉/聚乙烯醇复合材料及制备方法 |
EP3636434A1 (en) * | 2018-10-09 | 2020-04-15 | Flexopack S.A. | Thin film for waste packing |
CN110626038A (zh) * | 2019-09-27 | 2019-12-31 | 广东崇熙环保科技有限公司 | 生物降解膜及其制造方法 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114851672A (zh) * | 2022-07-07 | 2022-08-05 | 山东兰德英科新材料科技有限公司 | 采用可生物降解输液袋专用料制备输液袋的方法 |
CN114851672B (zh) * | 2022-07-07 | 2022-09-02 | 山东兰德英科新材料科技有限公司 | 采用可生物降解输液袋专用料制备输液袋的方法 |
CN116144147A (zh) * | 2022-12-22 | 2023-05-23 | 四川大学 | 环境友好型复合材料及其制备方法 |
CN116144147B (zh) * | 2022-12-22 | 2024-03-22 | 四川大学 | 环境友好型复合材料及其制备方法 |
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