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公开(公告)号：EP4375048A1
公开(公告)日：2024-05-29
申请号：EP22950053.3
申请日：2022-11-02
发明人： WANG, Ruxu , MA, Yiming , LI, Teng , ZHANG, Haoqian
CPC分类号： Y02W30/62
摘要： The present invention relates to the technical field of high molecular materials, in particular to a polyhydroxyalkanoate molded body and a preparation method therefor. The preparation method comprises: mixing polyhydroxyalkanoate raw materials, processing same at a first temperature, and drawing same at a second temperature, wherein the first temperature is 10-60°C higher than the melting point of a polyhydroxyalkanoate resin; the second temperature is higher than the glass transition temperature of a hydroxyalkanoate resin and lower than the melting point of the polyhydroxyalkanoate resin; and during the preparation process, under the condition of the second temperature, the following conditions need to be met: the draw ratio is 1.0 time or more, and the heating time at the temperature T is 30 s or more; or, the draw ratio is 3.0 times or more, and the heating time at the temperature T is 10 s or more. In the present invention, by optimizing the processing technology, a non-sticky molded body can be prepared; and the preparation method is simple and controllable, and can improve the processing and production efficiency.
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2.发明公开
公开(公告)号：EP4357417A1
公开(公告)日：2024-04-24
申请号：EP22947732.8
申请日：2022-12-05
发明人： MA, Zhiyu , MA, Yiming , LI, Teng , ZHANG, Haoqian
IPC分类号： C08L67/04
CPC分类号： Y02W90/10
摘要： The invention relates to the technical field of polyhydroxyalkanoate materials, and specifically discloses a marine degradable polyhydroxyalkanoate composition, a molded body and a preparation method thereof. The polyhydroxyalkanoate composition includes: (A): 38 to 89.5 parts of a polyhydroxyalkanoate; (B): 10 to 30 parts of an other fully biodegradable resin; (C): an additive, including: 0.1 to 0.5 parts of a chain extender, 0.1 to 1 parts of an antioxidant, and 0.1 to 1 part of a lubricant; (D): 0 to 30 parts of a filler. The molded body prepared from the composition provided by the present invention has high marine degradability and meets the marine biodegradation certification standard. In addition, the preparation method of the present invention can improve the processability and processing efficiency of the blended composition provided by the present invention.
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3.发明公开
公开(公告)号：EP4349913A1
公开(公告)日：2024-04-10
申请号：EP22940494.2
申请日：2022-12-28
发明人： MA, Zhiyu , MA, Yiming , LI, Teng , ZHANG, Haoqian
摘要： The present invention relates to the field of biodegradable materials, and specifically provides a polyhydroxyalkanoate composition comprising a crystallization accelerator, and a molded body. The polyhydroxyalkanoate composition comprises polyhydroxyalkanoate and a crystallization accelerator, wherein the crystallization accelerator is one or more of fatty acid amide compounds. By selecting fatty acid amide as the crystallization accelerator of polyhydroxyalkanoate, the composition provided by the present invention provides a certain time guarantee for the crystallization of the molded body, promotes the crystallization and molding of polyhydroxyalkanoate, and at the same time, solves the problem that the polyhydroxyalkanoate resin is adhered to processing equipment parts in the process of processing the polyhydroxyalkanoate molded body in the prior art, and improves the processing efficiency of preparing the molded body.
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