Kingfa Sci.&tech.co., Ltd.

Zhuhai Wango Chemical Co., Ltd.

Shihua He

Hui Yang

Xianbo Huang

Tongmin Cai

Xiangbin Zeng

Zhimin Yuan

Jian Jiao

Changli Lu

Xueteng Dong

Kai Xiong

Kaijin Mai

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&#x2264;P&#x2264;2.02. In the component (B), the talcum powder has a particle size Dsatisfying: 1 &#x3bc;m&#x2264;D&#x2264;2.6 &#x3bc;m. In the component (C), the plasticizer has a relative molecular weight M satisfying: 180&#x2264;M&#x2264;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&#x2264;P&#x2264;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&#x2265;80%, a haze H&#x2264;40%, and a heat deflection temperature HDT&#x2265;90&#xb0; C., having significantly improved heat resistance and transparency.

Polylactic acid composite and use thereof

Growing community of inventors

Guangzhou, China

Shihua He