Abstract: Antibacterial powder paint composition consisting mainly of polyamide, characterized in that zinc and/or silver/zinc composite compound is incorporated in polyamide as antibacterial agent. This powder coating composition can produce a film with improved antibacterial activity, discoloration and endurance.

Abstract: Antibacterial powder paint composition consisting mainly of polyamide, characterized in that zinc and/or silver/zinc composite compound is incorporated in polyamide as antibacterial agent. This powder coating composition can produce a film with improved antibacterial activity, discoloration and endurance.

Abstract: [Objective] The objective of the present invention lies in shortening the compost preparation period by a simple method and preventing contamination of underground water.

Abstract: The objective of the present invention lies in providing a resin composition which enables water vapor permeability to be controlled over a broad range while maintaining a high gas permeability, together with molded articles or packaging materials comprising said composition, in particular a packaging material for foodstuffs like fruit and vegetables. A thermoplastic resin composition which is characterized in that a polymer (A) containing polyether chains as structural units, polyethylene (B) of density as specified in JIS K6760 of less than 0.91 g/cm3 and a compatibilizing agent (C) are blended together in proportions by weight of A/B/C=99.5 to 0.5/0.5 to 99.5/0 to 30 (where A+B+C=100); and molded articles comprising said composition, in particular a packaging material for vegetables and fruit cultivation or foodstuffs storage.

Abstract: Manufacturing a thermoplastic composition, there is first melt-blended a polymer (A)containing polyether chains, e.g. a polyetherpolyamide block copolymer, with (C) a vinyl compound, e.g. a copolymer of styrene and maleic anhydride and/or a compatibilizing agent (D), e.g. a graft copolymer with a polyolefin with an unsaturated carboxylic acid and the resultant melt-blended mixture is pelletized. The resultant pellets are then blended with a polyolefin (B) e.g. polyethylene. The resultant overall blended mixture can then be molded into films having a low variation in thickness of a desired permeability of water vapor and other gases.

Abstract: Purpose: the purpose of the present invention is to offer resin compositions which have antimicrobial/fungistatic properties which show outstanding dispersion and outstandingly durable performance. Constitution: thermoplastic resin compositions characterized in that an antimicrobial/fungistatic agent, and particularly an inorganic antimicrobial/fungistatic agent, is compounded with a copolymer containing a polyether chain as a constituent unit, such as a polyether/polyamide copolymer, a polyether/polyester copolymer or a polyether urethane, for example, at 0.05-20 wt. %, and thermoplastic resin compositions which comprise a thermoplastic resin, an antimicrobial/fungistatic agent and a copolymer having a polyether chain as a constituent unit.

Abstract: The object of the present invention lies in offering plastic film having a suitable degree of moisture permeability and low water droplet adhesion.Plastic film which is characterized in that, in plastic film of moisture permeability, as prescribed in JIS Z0208, of less than 1000 g/m.sup.2 /24 h, there is lamination with a film of moisture permeability at least 1000 g/m.sup.2 /24 h.

Abstract: The invention provides a plastic film possessing improved permeability to water vapor and high heat shielding property. Said plastic film is characterized by water vapor permeability of 100 to 25,000 g/m.sup.2 /24 hr, light transmittance of 20 to 95% and infrared transmittance of 5 to 90% and made of at least one material selected from a group comprising polyetherpolyamide block copolymer, thermoplastic polyester elastomer and thermoplastic polyurethane and containing flat inorganic particles coated with a substance having high refractive index.

Abstract: The present invention lies in a process for modifying the surface of a molded article, which process comprises irradiating the surface of a molded article composed of an aromatic polymer or a polymer composition containing said aromatic polymer, with an ultraviolet laser beam having a wavelength of about 150 nm-380 nm at a fluence at least lower than the threshold to modify the surface as compared with the condition before the irradiation. The process makes it possible to modify the condition of the laser beam-irradiated surface portions of the molded article to, for example, a white color or black color, whereby the molded article can be endowed with functions and properties required in its use in various applications.

Abstract: A material for forming a hollow-molded body, which comprises a polyamide comprising hexamethylene isophthalamide units as the main recurring units. A hollow-molded body having an excellent gas barrier property can be obtained by using this polyamide molding material alone or in combination with polyethylene terephthalate.

Abstract: A packaging polyester material comprising a polyethylene terephthalate component and a component of polyethylene isophthalate copolymerized with 5 to 60 mole % of an aliphatic hydroxycarboxylic acid having up to 8 carbon atoms. This packaging material is excellent in the resistance to the permeation of gases.

Abstract: Hollow water-absorbing polyester filaments, each having fine pores evenly distributed throughout the filament and extending approximately in parallel to the filament axis, are produced by melt-spinning a blend of a polyester and a pore-forming agent consisting of at least one sulfonate compound of the formula:R'SO.sub.3 M'wherein R' is an alkyl radical having 3 to 30 carbon atoms or an aryl or alkylaryl radical having 7 to 40 carbon atoms and M' is an alkali or alkaline earth metal, and by removing at least a portion of the sulfonate compound from the hollow filaments by using an alkali aqueous solution so as to cause a number of fine pores to be formed in the hollow filaments and to cause each hollow to be connected to the outside of the filament through the fine pores.

Abstract: The present invention provides a substantially linear aromatic polyester carbonate consisting essentially of hydroxybenzoic acid unit, hydroquinone unit, and carbonate unit as well as, depending on the circumstances, aromatic carboxylic acid unit, and having an inherent viscosity of at least 0.5. The present invention also provides an industrially advantageous method for producing such linear aromatic polyester carbonate through the process steps of melt-polycondensation, and, if necessary, followed by a further polycondensation in solid phase.Such aromatic polyester carbonate which the present invention provides exhibits excellent melt-forming property and melt anisotropy, hence any shaped article obtained by melt-forming of this aromatic polyester carbonate exhibits superior mechanical properties, in particular, excellent Young's modulus of longitudinal elasticity, and so on, which is highly useful as the material for industrial applications.

Abstract: A process for preparing polyesters, which comprises reacting (A) a difunctional carboxylic acid component containing at least 50 mol% of a naphthalene dicarboxylic acid and/or its ester-forming derivative, (B) a diol component containing an aromatic group and at least 50 mol% of a 4,4'-bis-(.omega.-hydroxyalkoxy)diphenylsulfone and (C) an aliphatic or alicyclic diol component, the molar ratio of component (B) to component (A) being 0.05-1, and the molar ratio of the sum of components (B) and (C) to component (A) being 1.1-3.0; and then polymerizing the resulting reaction product in the presence of a catalyst while distilling off the excess of the component (C) out of the reaction system, thereby to form a polymer having a reduced viscosity of at least 0.5.

Abstract: Naphthalate polyester filaments, yarns or fibers consisting essentially of a naphthalate polyester which has an intrinsic viscosity of 0.3 to 3.5 and a softening point of at least 200.degree. C, and in which at least 85 mol% of the total recurring units consist of units of the formula ##STR1## wherein n is 4 or 6, and having at least one diffraction peak at a Bragg scattering angle 2.theta. = 16.3.degree. -- 16.7.degree. and/or 2.theta. = 25.3.degree. - 25.8.degree. in their X-ray diffraction. These filaments, yarns or fibers are useful especially as an electrically insulating material, an elastomeric reinforcing material, a fluid filter material, a paper-making canvas and a fastener component material.Of these, filaments, yarns or fibers of poly(tetramethylene 2,6-naphthalate) are prepared by melt-spinning the polymer thereby to form undrawn filaments having a birefringence of at lest 0.01 and a density of not more than 1.

Abstract: Polyester granule for melt-shaping which is composed of a difficultly crystallizable copolyester having the minimum time for half-crystallization of at least one minute, and has the surfaces resulting from cutting by a cutter, improvement in thatI. the polyester granule has an intrinsic viscosity of at least 0.55 (as measured in o-chlorophenol at 35.degree. C.),ii. the polyester granule has in its surface portion an oriented portion having an N-value of at least 0.04, the N-value being calculated by the equation,N =n..multidot..lambda.dandIii. the inside of the polyester granule other than the said surface portion has an N-value of not higher than 0.02.Said polyester granule can be prepared by cutting a copolyester melt-extrudate having an intrinsic viscosity of at least 0.55 under the conditions as will control the surface temperature t (.degree. C) of the extrudate to satisfy the expressionTg + 30.degree. C. .gtoreq. t > Tg - 15.degree. C.

Abstract: Heat-resistant aromatic polyester filaments having heretofore unknown physical properties and a combination of excellent heat resistance and mechanical strength, which (1) is composed of an aromatic polyester in which at least 90 mole % of the structural units are ethylene-2,6-naphthalate units, (2) has a melting point at a constant length (Tm;.degree.C.) of at least 287.degree. C., (3) has a density (d)(g/cm.sup.3) of at least 1.370, (4) is insoluble in a phenol/orthodichlorobenzene mixed solvent (mixing ratio = 6/4 on the weight basis) at 160.degree. C. and (5) meets the requirements expressed by the following formulaeL(Tm - 280) = 400 (I).DELTA. n(d - 1.350) = 70 .times. 10.sup.-.sup.3 (II)L = .lambda.K/(B-b)cos .theta. (III)and the process for the preparation thereof.

Abstract: A zip fastener made of a monofilament of 200 to 20,000 denier composed of a polymethylene terephthalate containing at least 85 mole % of trimethylene terephthalate, tetramethylene terephthalate or hexamethylene terephthalate as a recurring unit, said monofilament having an intrinsic viscosity of 0.35 to 3.5 and a circularity of not more than 1.01. The monofilament is prepared by melt-extruding the polymethylene terephthalate in the form of a filament, passing the extruded filament through an air gap, passing it through a cooling bath of an inert quenching liquid held at a temperature of about 60.degree. to 100.degree.C., then passing it through a cooling zone at a temperature of below 35.degree.C., and then drawing the filament.

Abstract: A thermally stable extrusion-molded article characterized by (1) consisting of a substantially linear polyester in which at least 90 mol% of the total recurring units consist of tetramethylene 2,6-naphthalate units, (2) having a density not in excess of 1.318, and (3) being in the unstretched state.This article is prepared by extruding a melt of a substantially linear polyester in which at least 90 mol% of the total recurring units consist of tetramethylene 2,6-naphthalate units into the form of a molded structure, and cooling the extruded molded structure to room temperature, wherein during the period in which the extruded molded structure is cooled from at least 75%C. to room temperature, the cooling of the molded structure is performed rapidly so that the density of the molded structure does not exceed 1.318.

Abstract: A process for preparing a shaped article by melt-extruding a polyester containing tetramethylene naphthalene-2,6-dicarboxylate or hexamethylene naphthalene-2,6-dicarboxylate as a main recurring unit, wherein the extrudate is exposed to a temperature of 75.degree. to 450.degree.C. for 1 to 180 seconds immediately after extrusion.