Orientated gel molding method of polyolefin-based resin composition and molded article obtainable by the method
AssigneeNew Japan Chemical Co., Ltd.
InventorsToshiaki Kobayashi, Kiyoshi Sadamitsu
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Abstract
The present invention provides a method of molding a polyolefin-based resin comprising the steps of dissolving at least one dibenzylidene sorbitol compound in a molten polyolefin resin, cooling the molten resin to a temperature not higher than the sol-gel transition temperature during the cooling cycle to form network-like crystals of the dibenzylidene sorbitol compound, and molding the resulting resin composition at a temperature not lower than the melting temperature of the polyolefin-based resin but not higher than the sol-gel transition temperature during the heating cycle; and a polyolefin resin molded article obtainable by this molding method.
Claims28
A polyolefin-based resin molded article obtainable by an orientated gel molding method of a polyolefin-based resin composition, the method comprising the step of molding a molten polyolef in resin composition containing network-like crystals of at least one dibenzylidene sorbitol compound represented by the formula (1):
- 2
- wherein R1 and R2 are the same or different, and each represent a hydrogen atom, a C1-C4 alkyl group, a C1-C4 alkoxy group or a halogen atom;
- m and n each represent 1 to 5;
- p is 0 or 1;
- when m is 2, the two R1's may optionally be taken together with the benzene ring to which they are attached to form a tetralin ring;
- and when n is 2, the two R2's may optionally be taken together with the benzene ring to which they are attached to form a tetralin ring.
Dependencies are inferred from the claim text.