摘要:
Disclosed is a polyacetal resin composition comprising 100 parts by weight of polyacetal resin having a melting temperature of from 150 to 161.degree. C.; 0.01 to 5.0 parts by weight of at least one bisamide compound of formula (1) ##STR1## and 0.0001 to 5.0 parts by weight of at least monoamide compound of formula (2) ##STR2## in which formulae (1) and (2) each of R.sup.1, R.sup.3 and R.sup.6 independently is an alkyl or an alkenyl, and R.sup.2 and R.sup.7 independently is an alkylene, an alkenylene, or --R.sup.4 --Ph--R.sup.5 -- (each of R.sup.4 and R.sup.5 independently is a single bond or a methylene, and Ph is a phenylene). The resin composition of the present invention has excellent mechanical strength retentivity during cooling-heating cycles. For example, not only occurrence of whitening, crazing or cracking but also lowering in impact resistance can be suppressed even after the resin composition experiences repeated cooling-heating cycles. Thus, the resin composition of the present invention can be advantageously used in various applications where repeated heating-cooling cycles are necessarily experienced. Also, disclosed is an insert molded article comprising the above-mentioned resin composition and a shaped part unified with the resin composition by insert molding, which article exhibits excellent cooling-heating cycle resistance with respect to the mechanical strength.
摘要:
A thermoplastic resin integrated structure, which comprises a structural member (A) molded from a resin composition (a) comprising 5-80 wt. % of polyacetal resin (a-1) and 20-95 wt. % of at least one resin (a-2) selected from the group consisting of polyolefin resin, olefinic elastomer and hydrogenated butadienic elastomer, and a structural member (B) molded from thermoplastic resin (b), the integrated structure having at least one structure of the structural member (A) and the structural member (B) as integrated together side by side has a good bonding strength between the structural member (A) molded from polyacetal-based resin and the structural member (B) molded from other thermoplastic resin, typically polyethylene.
摘要:
A polyacetal resin composition which comprises (A) 100 parts by weight of a polyacetal resin, (B) 1.0-30 parts by weight of an electrically conductive carbon black, and (C) 1.0-30 parts by weight of a carbon fiber of 120-350 &mgr;m in average fiber length.