Abstract: A blowing agent is infiltrated into polystyrene resin particles dispersed in an aqueous suspension. Before or during infiltration, a flame retardant solution obtained by dissolving 33-1,000 parts by weight of a powdery flame retardant and 20-200 parts by weight of a flame retardant aid having a 1-hour half-life temperature of 100-250° C. in 100 parts by weight of a plasticizer is supplied to the aqueous suspension to infiltrate the flame retardant and the flame retardant aid into the particles, producing expandable polystyrene resin particles. By dissolving the flame retardant, which doesn't accumulate in the living body and has satisfactory handleability, in a plasticizer, the flame retardant can be evenly infiltrated into resin particles. Consequently, expansion of the expandable particles doesn't result in unevenness of cell density and the particles have excellent heat-fusibility to one another during molding, and molded foam having excellent flame retardancy and heat resistance can be obtained.

Abstract: Provided are an article advancing device and an article arrangement shelf, wherein the article advancing device has a flexible sheet on which articles can be arranged at a condition where the sheet is extended, a roller to which one end of the sheet is fixed and which winds the sheet in the reverse extension direction, a drive means which rotates the roller in the winding direction of the sheet, and a wall member with which the articles in the first row of the articles arranged on the sheet come into contact. When the articles are arranged on the sheet, the article advancing device stops the winding operation of the sheet by the drive means by the contact of the articles in the first row with the wall member. The article advancing device has a simple article advancing function which employs a horizontally extending shelf basically having no incline and which does not require energy, such as electric power, and can be used regardless of the packaging state of the articles.

Abstract: There are provided expandable polystyrene resin particles formed by granulating a polystyrene resin containing an expanding agent, wherein the weight-average molecular weight Mw of the polystyrene resin is in the range of 120,000 to 270,000, and the expanding agent contains, as an essential component, pentane at a proportion of 3 to 8 parts by mass based on 100 parts by mass of the polystyrene resin, while the composition of the pentane is in the range of isopentane:normal pentane=10:90 to 80:20 by mass ratio. These expandable polystyrene resin particles can utilize a recycled raw material, and can produce a molded foam product having sufficient mechanical strength, while the expandable polystyrene resin particles have a long bead life and excellent low pressure moldability.

Abstract: Disclosed is an adhesive hydrogel containing a polymer matrix, water, and a polyhydric alcohol, wherein the polymer matrix contains a copolymer of a monofunctional monomer with a single polymerizable C—C double bond and a polyfunctional monomer with two or more polymerizable C—C double bonds, the monofunctional monomer contains a nonionic (meth)acrylamide-based monomer, and the polyfunctional monomer has a composition formula: ClHmOn, where O is an oxygen atom in an ether bond, l is an integer greater than or equal to 4, m is an integer greater than or equal to 6, and n is an integer greater than or equal to 0.

Abstract: Expandable composite resin particles for frozen storage comprising: composite resin particles of a polyolefin-based resin and a polystyrene-based resin; 7.5 to 11% by weight of volatile blowing agent contained in the composite resin particles and containing pentane; and 0.5 to 1.5% by weight of moisture attached to surfaces of the composite resin particles.

Abstract: A resin particle aggregate is the resin particle aggregate formed by aggregating a plurality of resin particles including a polymer of a vinyl monomer, includes 100 parts by mass of the resin particles and 1 to 5 parts by mass of a surfactant. The resin particles are cross-linked by a cross-linkable monomer in an amount of 10 to 50% by mass relative to the total mass of the resin particles, the resin particle aggregate contains an inorganic component in an amount of 0.5% by mass or less, the resin particles have a volume average particle diameter D1, particles contained in a dispersion liquid of the resin particle aggregate in water have a volume average particle diameter D2, and the ratio of D2/D1 is 15 or less.

Abstract: Spacer particles for a resin composition layer have a compressive strength at 10% compressive deformation (10% compressive strength) at room temperature (rt) of 0.05 to 10 MPa or a compressive strength at room temperature of 0.01 to 2 N determined as a compressive load at 10% compressive deformation in a film state, have a rate of change in 10% compressive strength by a temperature change from rt to 50° C. of 5% or less, a rate of change in 10% compressive strength by a temperature change from ?20° C. to rt of 30% or less, or a rate of change in compressive strength by a temperature change from ?50° C. to 50° C. of 15% or less determined as a compressive load at 10% compressive deformation in a film state, and have a volume average particle diameter of 2 to 200 ?m and a coefficient of variation in particle diameter of 15% or less.

Abstract: Expandable composite resin particles for long-term storage, comprising 500 to 5000 ppm of water and 7.5 to 11.0% by weight of pentane in composite resin of polyolefin-based resin and polystyrene-based resin.

Abstract: The present invention provides resin particles including polymer obtained of a monomer mixture containing a monofunctional (meth)acrylic ester monomer, a monomer represented by a general formula (I); CH2?C(R1)—COO—(CH2CH2O)n—CO—C(R1)?CH2??(I) where R1 is a hydrogen or a methyl group and n is an integer from 1 to 4, and a monomer represented by a general formula (II); CH2?C(R2)—COO—(CH2CH2O)m—CO—C(R2)?CH2??(II) where R2 is a hydrogen or a methyl group and m is an integer from 5 to 15. The resin particles have a volume average particle diameter of 5 to 50 ?m, a recovery rate of 15% or more to less than 30%, and a compression strength (MPa) that provides a multiplication product in the range of 24.5 to 60.0 obtained by multiplying the compression strength and the volume average particle diameter (?m).

Abstract: An adhesive hydrogel contains: a polymer matrix of a copolymer of a monofunctional monomer and a crosslinking monomer (a); another polymer component; water; and a polyhydric alcohol, wherein: either a structural unit derived from the monofunctional monomer contained in the polymer matrix or the other polymer component or both contain a structural unit derived from at least one compound (b) selected from the group consisting of ethylenically unsaturated carboxylic acids, ethylenically unsaturated carboxylic acid salts, and ethylenically unsaturated carboxylic acid derivatives having a hydroxyl group, an acid group, a salt thereof, an amino group, and/or an ammonium group; and the other polymer component contains a polymer compound (c) with a side chain having an oxyalkylene group or a polyoxyalkylene group.

Abstract: The present invention provides a light reflector having a superior blue light-cutting property and superior light reflecting ability. Since the light reflector of the present invention is characterized by containing a thermoplastic resin and light reflective particulates, and by the total amount of the metal elements calcium, potassium, and magnesium being 150 to 1,000 ?g/g, such has a superior blue light-cutting property; while controlling the reflection of light by absorbing light of the wavelength region of blue light, which is likely to have an adverse effect on human eyes, can effectively reflect visible light of other wavelength regions; and can reflect light so that light easy on the eyes is the reflected light.

Abstract: A carbon-containing modified polystyrene type resin particle of the present invention includes: a carbon-containing polypropylene type resin, and a polystyrene type resin in an amount of not less than 100 parts by weight but less than 400 parts by weight per 100 parts by weight of the carbon-containing polypropylene type resin, wherein the polystyrene type resin ratio at the central part of the particle is at least 1.2 times the polystyrene type resin ratio of the overall particle, the polystyrene type resin ratio being calculated by using the ratio (D698/D1376) of absorbances at 698 cm?1 and 1376 cm?1 which are obtained by infrared absorption spectra measured by ATR infrared spectroscopic analysis.

Abstract: A process for producing pre-expanded particles, comprising the steps of: impregnating 100 parts by weight of polystyrene type resin particles with a volatile blowing agent in the presence of 0.1 to 2.0 parts by weight of a first antistatic agent to obtain expandable resin particles; and bringing 100 parts by weight of the expandable resin particles into contact with 0.1 to 2.0 parts by weight of a second antistatic agent in the presence of an antifoaming agent, and then pre-expanding the particles, thereby obtaining pre-expanded particles, wherein the second antistatic agent and the antifoaming agent are used in a ratio by weight of 1:0.04 to 1.50.

Abstract: Expandable composite resin particles for long-term storage, comprising 500 to 5000 ppm of water and 7.5 to 11.0% by weight of pentane in composite resin of polyolefin-based resin and polystyrene-based resin.

Abstract: Provided is a plastic foamed article to be attached to an attaching target having a rod-shaped attaching portion having a radial direction, the plastic foamed article including a holding portion for holding the attaching portion in the radial direction in a state attached to the attaching target, the holding portion including a pair of opposite surfaces facing each other for holding the attaching portion between the pair of opposite surfaces and a protrusion provided on one of the pair of opposite surfaces, and at least a part of the protrusion is configured to be elastically deformed by the attaching portion in a state in which the attaching portion is held between the pair of opposite surfaces.

Abstract: Disclosed are non-spherical resin particles that allow for improvement of light diffusion, light reflection, and other related properties, and a manufacturing method thereof. The particles comprise first and second, different resin components (1) and (2), with the second resin component (2) residing locally near the surface of the non-spherical resin particles. The method of manufacturing non-spherical resin particles involves either allowing particles of a resin to absorb a vinyl-based polymerizable monomer contained in an aqueous emulsion followed by polymerization of the absorbed monomer or dissolving a resin in a vinyl-based polymerizable monomer followed by polymerization of the obtained solution in an aqueous medium. In the method, the resin has a site derived from a (meth)acrylic acid ester having a C2-C10 halogenated alkyl group or alicyclic hydrocarbon group and has a weight-average molecular weight of from 150,000 to 1,000,000.

Abstract: Expandable composite resin particles for long-term storage, comprising 500 to 5000 ppm of water and 7.5 to 11.0% by weight of pentane in composite resin of polyolefin-based resin and polystyrene-based resin.

Abstract: The invention provides non-spherical resin particles with a novel shape capable of improving light diffusion, adhesion, oil absorption, and other properties, as well as a manufacturing method and use of the particles. Each non-spherical resin particle includes a concave portion and a convex portion formed in the concave portion, wherein the convex portion has a quasi-spherical surface. The method of manufacturing non-spherical resin particles involves a step of polymerizing 100 parts by weight of a first monomer mixture containing 77 to 99.99 parts by weight of a branched alkyl methacrylate, 0.01 to 3 parts by weight of a polyfunctional monomer, and 0 to 20 parts by weight of a monofunctional (meth)acrylate which is not a branched alkyl methacrylate, in the presence of 0.1 to 0.9 parts by weight of a chain transfer agent and 0 to 100 parts by weight of a (meth)acrylate polymer, to obtain resin particles.

Abstract: An object is to provide a coupling device protection member that can prevent contact between a cushion material and a coupling device to protect the coupling device. A coupling device protection member is used in a vehicle seat that includes a cushion material that is elastically deformed by loads, a frame member that is stacked to the cushion material to reinforce the cushion material, and a surface cover that covers at least the cushion material, the surface cover being coupled to the frame member via a coupling device, in which the coupling device protection member is attached to the frame material so as to protect the coupling device coupled to the frame member.

Abstract: The present invention provides colored resin particles having excellent adhesiveness, a method for producing the same, and use thereof. Each of the colored resin particles is surface-coated with a polymer derived from a nitrogen-containing aromatic compound, and has an irregular shape with a circular appearance when viewed from a direction in which a projected area thereof becomes maximum, and with a non-circular appearance when viewed from a direction in which the projected area thereof becomes minimum.