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    Biodegradable polyester composition and use thereof
    2.
    发明授权
    Biodegradable polyester composition and use thereof 有权

    公开(公告)号：US11370909B2

    公开(公告)日：2022-06-28

    申请号：US16644459

    申请日：2019-05-24

    申请人： KINGFA SCI. & TECH. CO., LTD.

    发明人： Chunping Ouyang ,  Jian Jiao ,  Kaijin Mai ,  Xueteng Dong ,  Hui Yang ,  Weida Qu ,  Kai Xiong ,  Changli Lu ,  Xiangbin Zeng ,  Tongmin Cai ,  Xianbo Huang

    IPC分类号： C08L67/02 ,  C08L3/02 ,  C08J5/18 ,  C08K3/26 ,  C08K3/34 ,  C08K5/053

    摘要： The present invention discloses a biodegradable polyester composition, wherein the biodegradable polyester composition comprises the following components in parts by weight: i) 58 to 80 parts by weight of an aliphatic-aromatic copolyester; ii) 20 to 32 parts by weight of starch; and iii) 0 to 10 parts by weight of a processing agent. The present invention unexpectedly found by research that by using an aliphatic-aromatic copolyester in which an amount of aromatic carboxylic acid accounts for a total amount of diacid is 44 mol % to 48 mol % as a matrix resin, where the aliphatic-aromatic copolyester has a crystallization peak width D of 5° C. to 16° C., and by using starch of which a particle size D (50) is 2 μm to 12 μm as the other phase, and meanwhile by adding a specific amount of a processing agent, the polyester composition prepared has excellent transversal and longitudinal tear strengths, and the polyester composition has a biodegradation rate of 90% or more during the 12-week degradation test, satisfying the industrial compost.

    Polylactic acid composite and use thereof
    6.
    发明授权
    Polylactic acid composite and use thereof 有权

    公开(公告)号：US11530294B2

    公开(公告)日：2022-12-20

    申请号：US16644509

    申请日：2018-06-26

    申请人： Kingfa Sci. & Tech. Co., Ltd. ,  Zhuhai Wango Chemical Co., Ltd.

    发明人： Changli Lu ,  Zhimin Yuan ,  Tongmin Cai ,  Xianbo Huang ,  Xiangbin Zeng ,  Jian Jiao ,  Kai Xiong ,  Hui Yang ,  Kaijin Mai ,  Xueteng Dong ,  Shihua He

    IPC分类号： C08G63/08 ,  C08K3/34 ,  C08K5/00

    摘要： The present invention discloses a polylactic acid composite and use thereof. The polylactic acid composite includes the following components: (A) 89 to 98 parts by weight of polylactic acid; (B) 1 to 4 parts by weight of talcum powder; and (C) 1 to 7 parts by weight of a plasticizer. In the component (A), the polylactic acid has a polydispersity index P satisfying the following relationship: 1.55≤P≤2.02. In the component (B), the talcum powder has a particle size D(50) satisfying: 1 μm≤D(50)≤2.6 μm. In the component (C), the plasticizer has a relative molecular weight M satisfying: 180≤M≤670. Through research, the present invention has unexpectedly discovered that by using the polylactic acid having the polydispersity index P satisfying the relationship 1.55≤P≤2.02 as a matrix, adding a specific range of content of ultrafine talcum powder as a nucleating agent, and selecting the plasticizer of a specific molecular weight as a crystallization promotion agent, the prepared polylactic acid composite has a light transmittance T≥80%, a haze H≤40%, and a heat deflection temperature HDT≥90° C., having significantly improved heat resistance and transparency.

    MELT IMPREGNATION DEVICE AND MELT IMPREGNATION METHOD
    7.
    发明申请
    MELT IMPREGNATION DEVICE AND MELT IMPREGNATION METHOD 审中-公开

    公开(公告)号：US20190184606A1

    公开(公告)日：2019-06-20

    申请号：US15853993

    申请日：2017-12-26

    申请人： KINGFA SCI. & TECH. CO., LTD.

    发明人： Xianbo Huang ,  Chunhua Chen ,  Yonghua Li ,  Chao Zhang ,  Zhongfu Luo

    IPC分类号： B29B15/12 ,  B29C70/50 ,  B29B9/14

    摘要： The present invention discloses a melt impregnation device and a melt impregnation method. Through an impregnation chamber with a corrugated shape, when a resin melt-distributing runner is connected with a peak position of the impregnation chamber, a chamber vertical height of the peak position of the impregnation chamber is larger than a chamber vertical height of a trough position of the impregnation chamber, and when the resin melt-distributing runner is connected with the trough position of the impregnation chamber, the chamber vertical height of the trough position of the impregnation chamber is larger than the chamber vertical height of the peak position of the impregnation chamber. The present invention can balance an impregnating effect of a continuous fiber band, can carry a broken fiber hairiness which is generated during the impregnation out of an impregnation area, avoids a broken yarn, and enhances a production stability and a production efficiency.

    Biodegradable polyester and use thereof
    8.
    发明授权
    Biodegradable polyester and use thereof 有权

    公开(公告)号：US11149112B2

    公开(公告)日：2021-10-19

    申请号：US16644504

    申请日：2018-06-26

    申请人： KINGFA SCI. & TECH. CO., LTD.

    发明人： Weiwei Wang ,  Zhimin Yuan ,  Tongmin Cai ,  Xianbo Huang ,  Xiangbin Zeng ,  Nanbiao Ye ,  Zhilong Guo ,  Changli Lu

    IPC分类号： C08G63/183

    摘要： The present invention relates to a biodegradable polyester and use thereof, including components: A) acid components containing following repeating units: 50 to 58 mol % of terephthalic acid A1; 30 to 40 mol % of sebacic acid A2; and 2 to 20 mol % of an aliphatic dibasic acid A3 with a carbon chain length of 6 or less; B) butanediol. In the present invention, in the case of a high content of the terephthalic acid, the biodegradable polyester prepared by introducing an aliphatic dibasic acid unit having a carbon chain length of 6 or less can satisfy the degradation performance and rigidity and improve the tenacity of the material simultaneously.