Abstract: A resin composition comprises a thermoplastic resin, a non-terpene-series higher fatty acid or a derivative thereof and a black pigment. As the higher fatty acid or derivative thereof, use can be made of, for example, a saturated higher fatty acid having about 12 to 30 carbon atoms or a metal salt thereof. As the thermoplastic resin, use can be made of, for example, an acrylic resin A and a styrenic resin B. As the black dye or pigment, use can be made of, for example, carbon black. The resin composition may contain a dye or pigment such as titanium oxide. A clearly defined white marking is developed on the above resin composition by laser irradiation.

Abstract: A tearable film comprising a resin blend which is: (1) a blend of a first polymer which is a styrenic polymer and a second polymer selected from the group consisting of a polyester and a polyamide; or (2) a first polymer which is a polyester and a second polymer selected from the group consisting of a polycarbonate, an acrylic polymer and a polyamide. The film has an continuous phase and a dispersed phase, thereby forming an islands-sea structure, wherein the continuous phase constitutes 35-98 wt % and the dispersed phase constitutes 2-65 wt % of the film.

Abstract: A tearable film having excellent tear properties contains a dispersed phase and a continuous phase, with said film formed from a composition containing a styrenic polymer, an olefinic polymer, and a compatibilizer wherein the compatibilizer is selected from the group consisting of hydrogenated or modified copolymer of styrene and conjugated diene, olefinic copolymer having a cyclic olefin unit, and chlorinated polyolefin. The film composition is subjected, without stretching, to T-die molding or inflation molding to provide a tearable film. In the continuous phase of the film, said dispersed phase having an average aspect ratio of 3 or more and/or a thickness of 1 .mu.m or less is dispersed in layers. The ratio of the continuous phase to the dispersed phase is 35-98:2-65 (% by weight). In the film, the tearing maximum torque is 60 g.multidot.cm/.mu.m or less and the tearing maximum tensile force is 10 g/.mu.m or less, and the film can be torn straightly at least in one direction.

Abstract: A laminated film is obtained by laminating, through a liquid crystal polymer layer, a thermoplastic polymer layer which is adhesive to the liquid crystal polymer layer, on a thermoplastic polymer layer which is not adhesive to the liquid crystal polymer layer, such lamination being made in a co-extrusion molding machine, by extruding the laminated layers from a die and by separating the non-adhesive thermoplastic polymer layer from the liquid crystal polymer layer. The adhesive thermoplastic polymer layer is preferably formed by a modified polyolefin into which a functional group is being introduced. The non-adhesive thermoplastic polymer layer is preferably formed by an olefin polymer or a polyalkylene terephthalate.

Abstract: A laminated film is obtained by laminating, through a liquid crystal polymer layer, a thermoplastic polymer layer which is adhesive to the liquid crystal polymer layer, on a thermoplastic polymer layer which is not adhesive to the liquid crystal polymer layer, such lamination being made in a co-extrusion molding machine, by extruding the laminated layers from a die and by separating the non-adhesive thermoplastic polymer layer from the liquid crystal polymer layer. The adhesive thermoplastic polymer layer is preferably formed by a modified polyolefin into which a functional group is being introduced. The non-adhesive thermoplastic polymer layer is preferably formed by an olefin polymer or a polyalkylene terephthalate.

Abstract: A composite film comprising, at least, a liquid crystal polymer layer containing a thermotropic liquid crystal polymer, and a thermoplastic polymer layer laminated on at least one surface of the liquid crystal polymer layer. The thermoplastic polymer layer may be formed with an adhesive thermoplastic polymer layer having adhesive properties with respect to the liquid crystal polymer layer. The adhesive thermoplastic polymer layer is formed preferably by a modified polyolefin into which a functional group is being introduced, or a modified polyester, A thermoplastic polymer layer such as a polyalkylene terephthalate layer or olefin polymer layer may further be laminated on the adhesive thermoplastic polymer layer.

Abstract: A composite metal sheet comprising a metal sheet and a liquid crystal polymer layer containing a thermotropic liquid crystal polymer, the liquid crystal polymer layer being bonded to at least one surface of the metal sheet. The thermotropic liquid crystal polymer includes a polyester, a polythiol ester, a polyester amide, a polyazomethine and a polyester carbonate. The liquid crystal polymer layer may be preferably formed with a film containing the thermotropic liquid crystal polymer.

Abstract: The polyester-grafted polyamide of the present invention comprises a polyamide as the backbone and a thermoplastic polyester as the graft and has a number-average molecular weight in terms of standard polymethyl methacrylate of 50,000 to 500,000 as determined by gel permeation chromatography using 1,1,1,3,3,3-hexafluoro-2-propanol. The polyester-grafted polyamide is useful as a modifier for polyesters and polyamides.

Abstract: A throw away tip used for back-turning in which the throw away tip cuts deeply into work material in one direction in depth setting and machines in a different direction from the that of the depth setting has at least an end cutting flank for cutting into work material as depth setting. One or more than one middle cutting flanks are connected with the end cutting flank on the feed-direction side of the side cutting flank. The rake surface is provided with first and second chip breakers grooved along the end cutting flank and the middle cutting flank, respectively. A rake face is connected with the above flanks. The end cutting flank has an acute end cutting edge angle. The middle cutting flank has a cutting edge angle wider than the end cutting edge angle and narrower than a right angle. The side cutting flank has a setting angle which is wider than the entering angle.