Abstract:
Provided is an expanded propylene resin bead including a core layer in a foamed state, which includes a propylene-based resin composition (a) satisfying the following (i) and (ii); and a cover layer which includes an olefin-based resin (b) satisfying the following (iii) or (iv): (i) the propylene-based resin composition (a) is a mixture of 65% by weight to 98% by weight of a propylene-based resin (a1) having a melting point of 145° C. to 165° C. and a flexural modulus of 1,200 MPa or more and 35% by weight to 2% by weight of a propylene-based resin (a2) having a melting point of 100° C. to 145° C. and a flexural modulus of 800 MPa to 1,200 MPa; (ii) a difference in a melting point between the resin (a1) and the resin (a2) is 5° C. to 25° C.; (iii) the olefin-based resin (b) is a crystalline olefin-based resin having a melting point (TmB) that is lower than a melting point (TmA) of the composition (a) and being in a relation of (0° C.
Abstract:
A method for manufacturing including securing attachments disposed near both ends in the seat core member front portion made of a molded article of expanded beads, the securing attachments being connected by an embedded connecting member extending in the seat core member longitudinal direction. The securing attachment includes a base embedded in the molded article of expanded beads, an upright frame joined to the base to extend out of the molded article of expanded beads, and a securing portion extending from the upright frame to project away from the molded article of expanded beads. The method includes creating, during or after molding the molded article of expanded beads, a space or notch in an outer side of the securing attachment upright frame of the molded article of expanded beads in the seat core member longitudinal direction, the notch extending toward an outer side in the seat core member longitudinal direction.
Abstract:
A polylactic acid-based resin foamed molded article having a voidage of 5 to 45% by volume, a bulk density BD [g/cm3] of 0.01 to 0.2 g/cm3 and a ratio FT/BD of a flexural strength FT [MPa] thereof to the bulk density BD in the range of 6 to 25 MPa·cm3/g.
Abstract:
A seat back for vehicles including a seat back pad having supporting bodies fixed on a periphery of an opening or a seat frame, or formed integrally with the periphery of the opening by one or multiple-point support, the supporting bodies aligned at predetermined intervals, each arranged in a direction between periphery portions opposite to each other of the opening at a front surface portion formed as a backrest surface for a seated person, the supporting bodies being independent of each other in rod or plate form, each made of a synthetic resin foam having 20 mm or larger in bending deflection amount and 2 to 100 N in load when deflected by 20 mm measured in accordance with a method defined by JIS K7221-2:2006, and having an interspace portion configured such that the supporting bodies are allowed to be deformed by bending in a rear direction.
Abstract:
A laminated foam interleaf sheet for being interposed between glass plates, having a foam layer of a polyethylene-based resin, and an antistatic layer which is laminated on each of both sides of the foam layer and contains a polyethylene-based resin, a polystyrene-based resin and a polymeric antistatic agent, the laminated foam interleaf sheet having a surface roughness Ra of 30 μm or less.
Abstract:
The object of the present invention is to provide a seat cushion for vehicles which is excellent in recyclability, fitting feeling and cushioning properties when an occupant is seated.A plurality of independent rod-like or plate-like supporting bodies are constructed by a synthetic resin foam having a bending deflection amount equal to or larger than 20 mm and a load between 2 and 100 N at the 20 mm bending deflection time, a seat cushion pad is structured such as to be mounted, fitted or fixedly provided in the edge-like member or be integrally formed with the edge-like member so as to be supported at one point or a plurality of points in a direction of bridging between the edge-like members, a plurality of supporting bodies 3 are structured such as to be lined up at predetermined intervals.
Abstract:
An electrostatic dissipative, polypropylene-based resin expanded bead having an expanded core layer of a polypropylene-based resin, and a cover layer that covers the expanded core layer and that is composed of a mixed resin containing electrically conductive carbon black, wherein the mixed resin includes a polypropylene resin which forms a continuous phase and a polyethylene resin which forms dispersed phases dispersed in the continuous phase, with the electrically conductive carbon black being unevenly distributed to the dispersed phases side. In-mold molding of the expanded beads gave a molded article.
Abstract:
A method for producing a skin-covered foamed molded article includes blow molding a parison into a skin and heating expanded polystyrene beads filled in a hollow space of the skin to form a foam layer fuse-bonded to the skin, polystyrene resin composition having specific Charpy impact strength, MFR and branching degree. The skin of the skin-covered foamed molded article is formed of the specific polystyrene resin composition.
Abstract:
Provided is a method for producing a skin-covered foamed molded article of a hollow molded article in which a molded article of foamed particles is included by forming a hollow molded article by blow molding a parison formed by extruding a melt kneaded product of a polyethylene-based resin, filling thermoplastic resin foamed particles within the hollow molded article, and fusion bonding the foamed particles by supplying and discharging a heating medium from a heating medium supply pins inserted into the hollow molded article, wherein a polyethylene-based resin composition having tensile elongation at break of 500 to 1000% at 80° C. and half-crystallization time of 5 to 50 seconds at 120° C. is used for forming the hollow molded article so that a skin-covered foamed molded article having excellent fusion bonding property between foamed particles can be obtained with a short molding cycle.
Abstract:
An expandable composite resin bead comprises: a composite resin containing a polyethylene resin and a polystyrene resin; and a blowing agent impregnating the composite resin. The composite resin contains 5 to 20 mass % of the polyethylene resin and 80 to 95 mass % of the polystyrene resin. The blowing agent is an organic physical blowing agent. Furthermore, in the expandable composite resin bead, a predetermined swelling degree in methyl ethyl ketone at a temperature of 23° C. is not lower than 1.25.