Daikin Industries, Ltd.

Yoshichika Komiya

Takafumi Yamato

Ken Okanishi

Tsuyoshi Miyamori

The invention provides a processing aid enabling short-time disappearance of melt fracture occurred in extrusion-molding a melt-fabricable resin at a high shear rate, a great reduction in extrusion pressure, and production of molded articles with good appearance. The processing aid contains a polymer containing a fluorine-containing elastomeric polymer segment and a fluorine-containing non-elastomeric polymer segment.

Processing aid

The present invention provides a processing aid for polyolefins capable of improving the processability in processing polyolefins at a temperature lower than 220&#xb0; C. and a high shear rate. The processing aid for polyolefins is intended to be used in processing a polyolefin at a temperature lower than 220&#xb0; C., and contains a fluoropolymer that includes a polymerized unit (a) based on CF&#x2550;CFCFand a polymerized unit, (b) based on at least one selected from the group consisting of monomers represented by CH&#x2550;CXYand monomers represented by CF&#x2550;CXY.

Processing aid for polyolefins and a polyolefin composition

The present invention provides a processing aid for polyolefins which can eliminate melt fracture occurring at the start of molding in a short time even when a polyolefin, which is a melt-processable polymer, is extrusion-molded at a high speed. The present invention also aims to provide a polyolefin composition containing such a processing aid for polyolefins and a polyolefin. The processing aid for polyolefins contains an ethylene/tetrafluoroethylene copolymer as the only fluoropolymer, the ethylene/tetrafluoroethylene copolymer having a melting point of 170&#xb0; C. to 270&#xb0; C.

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Osaka, Japan

Yoshichika Komiya