Abstract: A fiber-reinforced thermoplastic resin prepreg containing (A) reinforcing fibers, (B) a sizing agent and (C) a polyamide resin is described, wherein the sizing agent (B) and the polyamide resin (C) satisfy the condition Nm/N0<4.0, wherein N0 is the average of torques necessary for maintaining the number of revolutions of a roller type blade at 100 rpm/15 minutes.

Abstract: A fiber-reinforced thermoplastic resin prepreg containing (A) reinforcing fibers, (B) a sizing agent and (C) a polyamide resin is described, wherein the sizing agent (B) and the polyamide resin (C) satisfy the condition Nm/N0<4.0, wherein N0 is the average of torques necessary for maintaining the number of revolutions of a roller type blade at 100 rpm/15 minutes.

Abstract: A polycarbonate/polyethylene terephthalate composite resin composition is provided, which contains a resin component of 100 parts by weight and contains a phosphorus thermal stabilizer of 0.01 to 0.5 parts by weight and/or a hindered phenol thermal stabilizer of 0.01 to 1 parts by weight, the resin component containing a polycarbonate resin of 95 to 30 weight % and a polyethylene terephthalate resin of 5 to 70 weight %. The polyethylene terephthalate resin contains a deactivated polycondensation catalyst. The polycarbonate/polyethylene terephthalate composite resin composition can be prevented from being deteriorated resulting from being thermally preserved.

Abstract: A polyester resin produced by polycondensing a dicarboxylic acid component containing an aromatic dicarboxylic acid or its ester-forming derivative as the main component and a diol component containing ethylene glycol as the main component in the presence of at least an antimony compound and a phosphorus compound, via an esterification reaction or an ester exchange reaction, which is characterized in that the amount of antimony eluted when immersed in hot water of 95° C. for 60 minutes in the form of particles having a number average particle weight of 24 mg, is not more than 1 ?g per 1 g of the polyester resin, as antimony atoms (Sb).

Abstract: A polyester resin produced by polycondensing a dicarboxylic acid component containing an aromatic dicarboxylic acid or its ester-forming derivative as the main component and a diol component containing ethylene glycol as the main component in the presence of at least an antimony compound and a phosphorus compound, via an esterification reaction or an ester exchange reaction, which is characterized in that the amount of antimony eluted when immersed in hot water of 95° C. for 60 minutes in the form of particles having a number average particle weight of 24 mg, is not more than 1 &mgr;g per 1 g of the polyester resin, as antimony atoms (Sb).

Abstract: A polyester resin produced by polycondensing a dicarboxylic acid component containing an aromatic dicarboxylic acid or its ester-forming derivative as the main component and a diol component containing ethylene glycol as the main component in the presence of at least an antimony compound and a phosphorus compound, via an esterification reaction or an ester exchange reaction, which is characterized in that the amount of antimony eluted when immersed in hot water of 95° C. for 60 minutes in the form of particles having a number average particle weight of 24 mg, is not more than 1 &mgr;g per 1 g of the polyester resin, as antimony atoms (Sb).

Abstract: A polyester resin produced by polycondensing a dicarboxylic acid component containing an aromatic dicarboxylic acid or its ester-forming derivative as the main component and a diol component containing ethylene glycol as the main component in the presence of at least an antimony compound and a phosphorus compound, via an esterification reaction or an ester exchange reaction, which is characterized in that the amount of antimony eluted when immersed in hot water of 95° C. for 60 minutes in the form of particles having a number average particle weight of 24 mg, is not more than 1 &mgr;g per 1 g of the polyester resin, as antimony atoms (Sb).

Abstract: An ethylene polymer, which is an ethylene homopolymer or a copolymer of ethylene and an .alpha.-olefin having 3 to 20 carbon atoms, having the following properties:(1) the melt index (MI) at a temperature of 190.degree. C. under a load of 21.6 kg is in the range of 0.1 to 100 g/10 min;(2) the density is in the range of 0.935 to 0.975 g/cm.sup.3 ; and(3) the characteristic value of biaxial extensional flow, .lambda.MAX (.lambda.MAX herein is an index of the extension ratio at which the nominal stress is maximum, provided that the extension ratio is in the range of 1 to 3, experimentally obtainable by a biaxial extensional flow test carried out at 190.degree. C. at a constant strain rate d.epsilon./dt of 0.05 s.sup.-1), is at least 1.6.

Abstract: An ethylene homopolymer or copolymer comprising ethylene and not more than 10% by weight of an .alpha.-olefin having from 3 to 20 carbon atoms and a fuel tank obtained therefrom are disclosed, said ethylene homopolymer or copolymer having (1) an intrinsic viscosity [.eta.] of from 2 to 6 dl/g, (2) a density of from 0.945 to 0.970 g/cm.sup.3, (3) an R value of from 2.5 to 4, said R value being defined as a .sigma..sub.2 /.rho..sub.1 ratio, wherein .sigma..sub.1 and .sigma..sub.2 mean stress in elongation with a strain at 2 sec and 4 sec, respectively, under a flow at an elongational strain rate .epsilon. of 0.5 sec.sup.-1, and (4) a relationship between high-velocity impact strength (HRI-IZOD) measured at -30.degree. C. and a melt index under a load of 21.6 kg (HLMI) satisfying formula:HRI-IZOD.gtoreq.-log HLMI+1.