Abstract:
The present invention relates to an electrolyte membrane, a membrane-electrode assembly and a polymer electrolyte fuel cell. The electrolyte membrane contains a polymer (1) including a hydrophobic structural unit and a structural unit having a proton-conducting group and a polymer (2) including a hydrophobic structural unit having no sulfonic group which is different from the hydrophobic structural unit of the polymer (1).
Abstract:
An expandable composite resin bead containing an organic physical blowing agent and a base resin composed of a composite resin obtained by polymerizing a styrene monomer in a polypropylene resin. The styrene monomer is polymerized in an amount of more than 400 parts by mass and not more than 1900 parts by mass with respect to 100 parts by mass of the polypropylene resin. The composite resin contains xylene solubles to be obtained through xylene solvent Soxhlet extraction of the expandable composite resin bead, the xylene solubles contain acetone solubles to be obtained through dissolution of the xylene solubles into acetone, and the acetone solubles have an absorbance ratio A (D698/D1376) of an absorbance D698 to an absorbance D1376 that are respectively measured at a wavenumber of 698 cm−1 and 1376 cm−1 as infrared absorption spectra of the acetone solubles within a range of from 8.5 to 23.
Abstract:
A method for producing a skin-covered molded article including filling polypropylene-based resin expanded beads in a hollow space of a thermoplastic resin skin and feeding steam into the hollow space to fusion-bond the expanded beads together, the expanded beads showing specific DSC characteristics involving a specific high temperature peak(s) with specific heat of fusion.
Abstract:
A method for producing cross-linked polyethylene resin expanded beads, including dispersing polyethylene resin particles containing a halogen-containing flame retardant in a dispersing medium in an autoclave, impregnating the dispersed resin particles with an organic peroxide and cross-linking the polyethylene resin therewith at a specific temperature range determined by the melting point of the polyethylene resin and by melting point or glass transition temperature of the flame retardant, impregnating the dispersed resin particles with a blowing agent, and then foaming and expanding the resulting cross-linked polyethylene-based resin particles.
Abstract:
A skin-covered foamed molded article composed of a polystyrene-based resin expanded beads molded article, and a skin that covers a substantially entire surface of the expanded beads molded article, wherein the skin is formed of an olefinic thermoplastic elastomer and covers the expanded beads molded article in such a manner that the skin is in contact with the surface thereof but is unbonded thereto.
Abstract:
A polyethylene-based resin foam sheet with density of 15 to 150 kg/m3, including a foam layer containing, as a base resin, polyethylene-based resin, and antistatic layer which is lamination bonded to at least one side of the foam layer containing a polymeric antistatic agent and, as base resin, polyethylene-based resin, wherein polymeric antistatic agent melting point of 125 to 140° C. and ratio of its partial heat of fusion in a region above melting point to its total heat of fusion of 40% or lower, wherein antistatic layer contains the polymeric antistatic agent of 45 to 300 parts by mass based on 100 parts by mass of the polyethylene-based resin constituting the antistatic layer, wherein antistatic layer has a weight of 1 to 50 g/m2, and antistatic layer shows initial electrostatic potential of 50 V or lower when a voltage of 10 kV is applied to a surface for 30 seconds.
Abstract translation:一种密度为15〜150kg / m 3的聚乙烯系树脂发泡体片,包括含有作为基础树脂的聚乙烯类树脂的发泡层和层叠在泡沫层的至少一面上的抗静电层,所述泡沫层含有 聚合抗静电剂,作为基础树脂的聚乙烯类树脂,其中聚合抗静电剂的熔点为125〜140℃,熔融点以上熔融区域的熔融热分量与熔融热的共聚热比为40 %以下,其中抗静电层含有基于100质量份构成抗静电层的聚乙烯类树脂为45〜300质量份的抗静电剂,其中抗静电层的重量为1〜50g / m 2, 并且当对表面施加10kV的电压30秒时,抗静电层显示50V或更低的初始静电电位。
Abstract:
Provided is a hollow foamed blow-molded article having a high heat resistance, employing a thermoplastic resin composition containing a mixed resin of a polyphenylene ether resin and a polystyrene resin, as a base resin. The foamed blow-molded article, may be produced by extruding a foamable molten resin composition obtained by kneading the thermoplastic resin composition and a blowing agent to form a foamed parison, and blow molding the foamed parison. A glass transition temperature of the thermoplastic resin composition is 110° C. or higher. A melt viscosity of the thermoplastic resin composition at a temperature of the glass transition temperature+80° C. and at a shear rate of 100/sec is 3000 to 9500 Pa·s. The physical blowing agent is a blowing agent containing a hydrocarbon compound having 3-5 carbon atoms. A blending amount of the physical blowing agent is 0.4 to 1 mol per kg of the thermoplastic resin composition.
Abstract:
A method for producing a multi-layer foam sheet having a foam layer and a resin layer laminated on at least one side of the foam layer, includes coextruding a foamable molten resin composition which contains a low density polyethylene and a physical blowing agent and a molten resin composition which contains 80 to 20% by weight of a specific ethylene-propylene random copolymer and 20 to 80% by weight of a specific polyethylene resin so that the foamable molten resin composition forms the foam layer and the molten resin composition forms the resin layer.
Abstract:
Foamed and expanded beads including a polyester-based resin containing at least 35 mole % of an aliphatic ester component. The foamed beads have a gel fraction of at least 5 % by weight and comprises at least one gel accelerating agent selected from fatty acids having 12-25 carbon atoms, metal salts of the fatty acids, esters of the fatty acids and amides of the fatty acids in an amount of 0.15-3 % by weight. A foam molding is obtained by heating the foamed and expanded beads in a mold.
Abstract:
The present invention provides a speaker unit comprising a diaphragm of 0.5 to 10 mm thick aromatic polycarbonate with a density of 0.03 to 0.6 g/cm3, and a mechanism for driving the diaphragm. The aromatic polycarbonate used for the diaphragm is preferably derived from bisphenol with a viscosity average molecular weight of 25,000 to 70,000. The invention further provides a speaker system comprising such a speaker unit attached to a cabinet and a method for manufacturing the speaker diaphragm.
Abstract translation:本发明提供一种扬声器单元,其包括密度为0.03至0.6g / cm 3的0.5至10mm厚的芳族聚碳酸酯的隔膜和用于驱动隔膜的机构。 用于隔膜的芳族聚碳酸酯优选衍生自粘均分子量为25,000至70,000的双酚。 本发明还提供一种扬声器系统,其包括附接到机壳的扬声器单元和用于制造扬声器振膜的方法。