Kingfa Sci.&tech.co., Ltd.

Yanfeng Automotive Trim Systems Co., Ltd.

Guangzhou Jishi Construction Group Co., Ltd.

Guangzhou Xinqiao Construction Service Co., Ltd.

Wenlong Li

Peng Wang

Bo Yang

Nanbiao Ye

Chao Ding

Jianfeng Hou

Zhongfu Luo

Mingxi Jiang

Weicai Tang

Wenxian Li

Xiongwu Lei

Xueyong Zhang

Changyin Ding

Jianxin Qin

Pingyu Huang

Yinghui Zhou

Yuqi Li

Dengjia He

Jiantao Qiu

Lan Zhao

Dehui Ke

Shiliang Qiu

Bingquan He

Guangwei Zhang

Muzhen Chen

Jin Mo

A polypropylene composition, a preparation method thereof, and a film or a sheet prepared from the polypropylene composition and use thereof. The composition includes 45 parts to 75 parts of a polypropylene, 10 parts to 35 parts of an elastomer, 5 parts to 20 parts of a polyethylene, 0.1 parts to 0.5 parts of an antioxidant, and 0.1 parts to 0.5 parts of a lubricant. A half peak width of a crystallization peak of the polypropylene is 5&#xb0; C. to 10&#xb0; C., and a peak temperature of the crystallization peak of the polypropylene is 105&#xb0; C. to 115&#xb0; C. The polypropylene composition has a good tenacity, especially a&#x2212;30&#xb0; C. low-temperature impact performance. The film or the sheet prepared from the composition and applied to automotive interior parts, can enable the external accessories not only to be less likely to generate sharp fragments while being strongly impacted, but also to have a matte characteristic.

Polypropylene composition and preparation method thereof, and film or sheet prepared from the polypropylene composition and use thereof

Described herein is a construction system for a subway station, wherein the construction of guide walls is accomplished using a guide wall steel formwork system, the construction of support beams is accomplished using a support beam steel formwork system, the construction of sidewalls is accomplished using a sidewall trolley, and the construction of floor slabs is accomplished using a floor slab trolley.

Construction system for subway station

Growing community of inventors

Guangzhou, China

Wenlong Li