China Petroleum & Chemical Corporation

Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation

Yun Lyu

Shijun Zhang

Jingbo Shao

Liying Zhang

Dali Gao

Yihui Xu

Jianye Liu

Kai Xu

Qi Zhang

Liqiu Chu

Yiqing Bai

Hao Zou

Mu Dong

Qiang Li

Meng Xu

Hua Yin

Qingquan Yang

Baige Chou

Jinliang Qiao

Peng Guo

Liangshi Wang

Meifang Guo

Luqiang Yu

Mingfu Lyu

Hui Quan

Hongwei Shi

Yaohui Xu

Honghong Huang

Jianjun Yin

Yujing Tang

Ruoshi Chen

Ruxian Li

Yueming Ren

A method for preparing a polyolefin resin powder has the steps of The difference between the solubility parameters of the organic solvent and of the polyolefin resin is within 0-20% of the solubility parameter of the polyolefin resin. The polyolefin resin powder obtained according to this method has good antioxidant property, good powder flowability, moderate size, smooth surface, suitable bulk density, and suitable dispersibility and particle size distribution.

Polyolefin resin powder suitable for selective laser sintering and its preparation method

A method for preparing an aliphatic polyester resin powder includes the steps of a) heat dissolving a crystalline aliphatic polyester resin in an organic solvent to obtain an aliphatic polyester resin solution; b) cooling the aliphatic polyester resin solution to precipitate a solid, thereby obtaining a solid-liquid mixture; c) optionally adding an adjuvant to the solid-liquid mixture and mixing; and d) conducting solid-liquid separation and drying to obtain an aliphatic polyester resin powder suitable for selective laser sintering. The crystalline aliphatic polyester resin powder obtained has good antioxidant property, good powder flowability, moderate size, smooth surface, suitable bulk density, and suitable dispersibility and particle size distribution. The aliphatic polyester resin powder is particularly suitable for selective laser sintering method.

Aliphatic polyester resin powder suitable for selective laser sintering and its preparation method

A polyethylene composition comprising an ethylene/&#x3b1;-olefin copolymerized linear low density polyethylene, wherein the polyethylene composition has a Mw of from 100,000 g/mol to 200,000 g/mol, a Mw/Mn of from 4.0 to 9.0, a Mz/Mw of from 4.0 to 7.0, and a Mz+1/Mw of from 4.5 to 13.5, is provided. A film formed of the polyethylene composition is also provided.

Polyethylene compositions and films formed therefrom

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Beijing, China

Yun Lyu