Abstract: An apparatus for fabricating a perforated web comprising an endless masking plate arranged above a continuously conveyed web. The masking plate has a plurality of apertures arranged in a predetermined pattern, the masking plate being adapted so as to be continuously circulated. The light is irradiated to the web via the masking plate so that apertures or slits are formed in the web corresponding to the apertures of the masking plate. The light may be a laser, an infrared light, or an ultraviolet light, and the light from the source is diverged transversely about the web and converged longitudinally about the web.

Abstract: A method for preparing a polymer rod for optical transmission media. The process involves copolymerization of monomers having different boiling points by removal of monomer vapor during polymerization. The process results in a transition in refractive index along the radial direction of the polymer rod.

Abstract: A multilayered packaging material having good piercing resistance and tearability and being excellent in appearance, transparency and so forth, can be produced by orienting multilayered structure which is composed of a polyamide resin layer and other thermoplastic resin layer(s) at a monoaxially stretching ratio of 1.5- to 7.0-fold in such a manner that the thickness of the polyamide resin layer is 3 to 30 .mu.m and the thickness(es) of the other thermoplastic resin layer(s) is (are) at least twice as much as that of the polyamide resin layer.

Abstract: Active agent-containing printing ink which contains fine particles of thermoplastic polymer containing an active agent. The effect of active agent contained in a printed matter can be properly and effectually produced for a long period of time without causing undesirable release or deterioration of the active agent in printing and uses.

Abstract: An improved thermoplastic resin composition obtained by subjecting a mixture of at least an engineering plastic and a rubber material containing an .alpha.,.beta.-unsaturated carboxylic acids or their derivatives, to dynamic heat treatment in the presence of a carbon radical inducing agent. The thermoplastic resin composition of the invention excels in thermal resistance, rigidity, impact resistance, and moldability.

Abstract: A therapeutic agent used for photodynamic therapy of atherosclerosis of mammals, which agent comprises at least one member of fluorescent compounds selected from the group consisting of tetrapyrrole carboxylic acids having at least one carboxyl group, corresponding di- or tetrahydrotetrapyrrole carboxylic acids, and mono-, di- or polyamides of the tetrapyrrole carboxylic acids with amino-mono- or dicarboxylic acids and their salts.

Abstract: A laminated nonwoven fabric comprising a first web having a network structure having laterally extending ribbons and nodes interconnecting longitudinally adjacent ribbons, and a second web laminated to the first web. The first web is fabricated such that one node is laterally shifted from another longitudinally adjacent node so that the nodes are uniformly distributed in the first web. Preferably, the nodes are arranged in a regular pattern and on a line extending oblique to the longitudinal direction of the first web.

Abstract: A partially crosslinked thermoplastic resin composition is prepared by dynamically heat-treating a thermoplastic resin (A) in the presence of a carbon radical inducing agent (B) comprising a charge transfer complex or a combination of a hydrogen donating compound and a hydrogen accepting compound.

Abstract: For the purpose of mass-producing sheet pallets made of a synthetic resin with a high productivity and without difficulty, an apparatus for manufacturing sheets is provided, which apparatus includes a process (1001) to feed sheet materials in a predetermined shape and having corner portions, a process (1002) to form sheets of a desired shape by cutting at least the corner portions of said sheet materials and a process (280) to stack said sheets

Abstract: A resin composition of wholly-aromatic thermotropic liquid crystal polyester resin containing 5 to 60% by weight of an inorganic filler selected from carbonates of alkaline earth metals, which is characterized in that the moisture content of the component materials to be fed to the melting step in preparation process of said composition is 0.1% by weight or lower. The resin composition and its formed articles are quite excellent in external appearance, thermal resistance, workability in plastics forming and especially in plating strength suitable for applying metal plating thereon.

Abstract: The present invention provides a polypropylene film having high transparency and heat-sealability and superior in the balance between stiffness (tensile modulus) and impact resistance which polypropylene film comprises a) 80-99.5% by weight of a propylene polymer and b) 0.5-20% by weight of an ethylene/.alpha.-olefin copolymer prepared by the copolymerization of ethylene and an .alpha.-olefin having a 3 to 12 carbon atoms, said ethylene/.alpha.-olefin copolymer satisfying the following conditions (i) to (iii):(i) a density of 0.860 to 0.910 g/cm.sup.3 ;(ii) a maximum peak temperature of not lower than 100.degree. C. as measured by differential scanning calorimetry (DSC); and(iii) an insolubles content in boiling n-hexane of not lower than 10% by weight.

Abstract: A molded article of a composition obtained by dynamically heat-treating a thermoplastic resin and/or a rubbery substance in the presence of a crosslinking agent, or such composition with an inorganic filler incorporated therein, is subjected to the radiation of ultraviolet light not longer than 300 nm in wave length, whereby surface characteristics of the molded article can be improved without deterioration of such characteristics as rigidity, impact- and heat-resistance, dimensional stability and processability.

Abstract: Method and apparatus for fabricating a perforated film comprising the steps of pinching a film material, (3) between a cutter roll (1) with cutting edges (12) and a backing roll (2) to press the cutting edges (12) to the film material (3) and driving, to rotate least one of the cutter roll (1) and the backing roll (2), to form holes such as slits in a film material. The apparatus is decelerated by a stop command signal of an apparatus, detecting the speed of the apparatus attaining a predetermined small speed, generating an advance stop signal when the apparatus is approaching a stop a condition, and displacing the backing roll (2) so that the cutter roll is separated from the backing roll.

Abstract: An excellent pressure-sensitive copying material which has an excellent color developing rate, little odor, and neither offset nor bleeding, said copying material comprising an electron-accepting developer and a solution of an electron-donating color former which produces colors upon contacting with said color developer, wherein it is characterized in that the solvent of said solution comprises a mixture of 20 to 80 weight % of sec-butyldiphenylmethane, 5 to 50 weight % of sec-butyldiphenylethane (1,1) and 5 to 50 weight % of sec-butyldiphenylethane (1,2).

Abstract: A cushion or trackbed material for use in a riding-ground is obtained by coating sand with a carboxyl-containing olefin polymer and an oxygen-containing wax.

Abstract: A method of manufacturing a multimode optical transmission medium from a synthetic resin having the distribution of refractive index varying continuously in a fixed direction. In the method, the polymerization is caused to proceed utilizing the effect of diffusion or exclusion of a monomer in the gel formed at the polymerization initiating terminal. Therefore, this method is free from the defects of methods using conventional polymerization reactions, and has an extremely high productivity.

Abstract: A thermoplastic resin composition is prepared by heat-treating a mixture of a thermoplastic resin substantially containing no olefinic unsaturated carbon-carbon bond and an elastomer having an olefinic unsaturated carbon-carbon bond, dynamically in the presence of a crosslinking agent, characterized in that as said elastomer there is used at least one member selected from the group consisting of styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), 1,2-polybutadiene rubber and ethylene-propylene-diene random copolymer (EPDM), and that as said crosslinking agent there is used a dihydroaromatic compound or a polymer thereof.

Abstract: A rotary splitting tool for splitting a web of plastic material to fabricate a fibrillated web, comprising a rotatable body having a plurality of transverse ridges provided on the periphery in a circumferentially equidistant relationship and extending generally parallel to the central rotation axis, and rows of cutting edges provided on the transverse ridges, respectively. Convex walls are provided on the periphery of the body between the adjacent transverse ridges. The convex wall means receives a web to be split so that oscillation of the web during repeated operations of the cutting edges can be minimized to reduce noise and prevent irregular slits.

Abstract: Surface characteristics of a molded article formed by a composition comprising at least two kinds of engineering plastics and a functionalized polyolefin resin or a composition comprising the said composition and an inorganic filler or a rubbery substance incorporated therein can be improved without deteriorating such characteristics as rigidity, impact resistance, heat resistance, dimensional stability and moldability, by radiating an ultraviolet light not longer than 300 nm in wavelength to the molded article, the said functionalized polyolefin resin containing at least one member selected from the group consisting of carboxylic acid group-, carboxylic ester group- or acid anhydride group-containing monomers, epoxy group-containing monomers, hydroxyl group-containing monomers, amino group-containing monomers, alkenyl cyclic iminoether derivatives and polyfunctional monomers.

Abstract: A multi-layered blow-molded bottle comprising at least two layers of a polyolefin resin (A), at least two layers of an adhesive resin (B) prepared by melt-reacting an olefin polymer (b.sub.1) with a rubber (b.sub.2) and an unsaturated carboxylic acid or a derivative thereof (b.sub.3) in the presence of an organic peroxide to obtain a product and adding a rubber (b.sub.4) to the product to melt-mix them with each other, and at least one layer of a barrier resin (C) selected from among polyamide, polycarbonate, polyester, polyvinylidene chloride and saponified ethylene-vinyl acetate polymer resins, which are laminated in the order of A/B/C/B/A.