Abstract: 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.

Abstract: The present invention provides a processing aid for polyolefins capable of improving the processability in processing polyolefins at a temperature lower than 220° 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° C., and contains a fluoropolymer that includes a polymerized unit (a) based on CF2?CFCF3 and a polymerized unit, (b) based on at least one selected from the group consisting of monomers represented by CH2?CX11Y11 and monomers represented by CF2?CX21Y21.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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° C. to 270° C.

Abstract: The present invention provides a processing aid for polyolefins capable of improving the processability in processing polyolefins at a temperature lower than 220° 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° C., and contains a fluoropolymer that includes a polymerized unit (a) based on CF2?CFCF3 and a polymerized unit, (b) based on at least one selected from the group consisting of monomers represented by CH2?CX11Y11 and monomers represented by CF2?CX21Y21.

Abstract: The present invention aims to provide a polyolefin composition including: a processing aid for polyolefins that enables disappearance of melt fracture occurred at the start of molding in a short time even when a polyolefin that is a melt-fabricable polymer is extrusion-molded at a high rate; and a specific polyolefin. The present invention relates to a processing aid for polyolefins, including a perfluoroelastomer. The processing aid is intended to be used for extrusion-molding at least one polyolefin selected from the group consisting of low-density polyethylene, linear low-density polyethylene, high-density polyethylene, metallocene linear low-density polyethylene, polypropylene, and polyvinyl chloride.

Abstract: 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° C. to 270° C.

Abstract: The invention provides a polymer processing additive which, when added to a melt-processable resin, is highly effective in improving the moldability of the resin, and a molding composition containing the polymer processing additive, among others. This invention is related to a polymer processing additive comprising a fluoroelastomer subjected to heat treatment with an alkali metal inorganic salt or alkaline earth metal inorganic salt added thereto.

Abstract: The invention provides a polymer processing additive which, when added to a melt-processable resin, is highly effective in improving the moldability of the resin, and a molding composition containing the polymer processing additive, among others. This invention is related to a polymer processing additive comprising a fluoroelastomer subjected to heat treatment with an alkali metal inorganic salt or alkaline earth metal inorganic salt added thereto.