Abstract: A blow-molded foam having a wall portion formed in such a manner that a thermoplastic resin containing a foaming agent mixed therewith is subjected to blow molding. Herein, the wall portion has a closed cell structure in which a plurality of foamed cells are contained. The wall portion has an expansion ratio of not less than 2.0 times. The wall portion has an outer face having a center-line average surface roughness Ra of less than 9.0 ?m. The foamed cell has a cell diameter having a standard deviation of less than 40 ?m in a thickness direction of the wall portion.

Abstract: [Problem] To provide a light-weight air conditioning duct for vehicle that is light in weight and excellent in mechanical strength. [Solution] The present invention is directed to a light-weight air conditioning duct for vehicle 1 for letting conditioned air supplied from an air conditioning unit pass through to a desired location, the duct being obtained by blow-molding a mixed resin including a polypropylene-based resin for foaming and a hydrogenated styrene-based thermoplastic elastomer, and the duct having an Izod impact strength equal to or larger than 10 J/m at ?20 degrees Celsius.

Abstract: [PROBLEMS] An impact absorption body for a vehicle can have desired impact absorption performance, exhibits excellent impact absorption performance particularly immediately after an impact is applied to the body, and can maintain high impact absorption performance. [MEANS FOR SOLVING PROBLEMS] The impact absorption body (1) for a vehicle is installed within a vehicle forming member and absorbs impact energy in a collision. The impact absorption body (1) has a first wall (4) placed on the side that receives an impact, a second wall (5) facing the first wall (4) with a hollow section (2) between them, and one or more impact absorption ribs (9) constructed from deep groove sections (15) and shallow groove sections (16). The deep groove sections (15) are formed by depressing the first wall (4) and second wall (5) into groove shapes and integrally joining the top surfaces, which function as fusion bonding surfaces, of the depressions.

Abstract: An impact absorber is provided in a trim of a vehicle for protecting a waist portion of a passenger. The impact absorber includes: a first portion corresponding to the pubis of the passenger; and a second portion corresponding to the ilium of the passenger. Stress generated in the first portion when the passenger hits the trim has a first predetermined value or less, and stress generated in the second portion when the passenger hits on the trim has a second predetermined value or more, the second predetermined value being greater than the first predetermined value.

Abstract: A method of producing a vehicle interior panel having a hollow double-walled structure made of thermoplastic comprising, blow molding with a pair of mold halves including a first mold with a shape transfer surface having a three dimensional pattern, and a second mold, clamping a cover material being formed by at least a double-layer structure arranged between a cavity of said first mold and a parison of thermoplastic such that a resin sheet layer without a through hole and without a three dimensional pattern faces a cavity of said first mold, introducing a pressurized fluid into the parison to press the cover material and the parison against a cavity surface, thereby integrally laminating said cover material to an outer surface of a first wall of the panel having the hollow double-walled structure and transferring said three dimensional pattern of said first mold half to said resin sheet.

Abstract: An object of the invention is to provide a method for manufacturing a molded foam which is lightweight and excellent in strength. According to the invention, a method for manufacturing a molded foam from a foamed parison includes: an extruding step of extruding a resin blend containing a foaming agent and a thermoplastic resin to form a foamed parison; an attaching step of closely attaching facing portions of an inner wall surface of the foamed parison to each other to form a foamed parison laminated body; a mold clamping step of sealing and mold clamping the foamed parison laminated body by clamping the foamed parison laminated body by split mold blocks; and a sucking step of sucking air between the split mold blocks to reduce a pressure between the split mold blocks, after the attaching step and the mold clamping step.

Abstract: The resin impact energy absorber for vehicle includes a peripheral wall, a planar portion surrounded by the peripheral wall, and a plurality of first protrusions. The first protrusions are parallel to one another at a predetermined interval in the planar portion. The first protrusion includes a pair of inclined vertical walls and a top wall. The pair of inclined vertical walls projects from the planar portion. The inclined vertical walls face one another. The top wall couples tops of the inclined vertical walls with one another at approximately the same height as the peripheral wall. The inclined vertical walls are inclined at a predetermined inclination angle such that the inclined vertical walls come close to one another as approaching from the planar portion to the top wall. The planar portion includes one plate surface and another plate surface. At least one of them includes an impact load receiving surface.

Abstract: An impact absorber is provided in a trim of a vehicle for protecting a waist portion of a passenger. The impact absorber includes: a first portion corresponding to the pubis of the passenger; and a second portion corresponding to the ilium of the passenger. Stress generated in the first portion when the passenger hits the trim has a first predetermined value or less, and stress generated in the second portion when the passenger hits on the trim has a second predetermined value or more, the second predetermined value being greater than the first predetermined value.

Abstract: An interior article for automobiles is provided having a light-weight and suitable rigidity without lowering moldability even if the amount of use of a thermoplastic resin is decreased. A panel having a hollow double-wall structure and constituting an interior part for automobiles is formed from a mixture of polyolefin resins comprised of a propylene homopolymer having a specific gravity of 0.93 or less (JIS K7112), exhibiting a melt flow rate of 0.3 to 3.0 g/10 minutes (JIS K7210) and exhibiting a bending modulus of 1400 MPa or more (JIS K6758), a crystalline propylene block copolymer having a specific gravity of 0.93 or less (JIS K7112), exhibiting a melt flow rate of 0.3 to 1.5 g/10 minutes (JIS K7210) and exhibiting a bending modulus of 1250 MPa or less (JIS K7171) and a high density polyethylene having a specific gravity of 0.925 to 0.965 (JIS K7112) and exhibiting a melt flow rate of 0.5 g/10 minutes or less (JIS K7210).

Abstract: A method of producing a vehicle interior panel having a hollow double-walled structure made of thermoplastic comprising, blow molding with a pair of mold halves including a first mold with a shape transfer surface having a three dimensional pattern, and a second mold, clamping a cover material being formed by at least a double-layer structure arranged between a cavity of said first mold and a parison of thermoplastic such that a resin sheet layer without a through hole and without a three dimensional pattern faces a cavity of said first mold, introducing a pressurized fluid into the parison to press the cover material and the parison against a cavity surface, thereby integrally laminating said cover material to an outer surface of a first wall of the panel having the hollow double-walled structure and transferring said three dimensional pattern of said first mold half to said resin sheet.

Abstract: Provided is a shock absorber for a vehicle, which, when it is crushed, can break and open a part of the wall thereof earlier than the time of the break of an explosion inducing section, to thereby exclude the effect of the air being present inside a hollow portion and exhibit stable shock-absorbing capability and also maintain a satisfactory shock-absorbing capability over a wide range of temperature from a high temperature to a low temperature independently of the temperature of the open air. A shock absorber (1) is a hollow structure integrally molded through blow molding. The shock absorber (1) has at least one explosion inducing section (12). The explosion inducing section (12) comprises a protruded ridge (13) in a notch form formed on the surface of the wall of the shock absorber (1). The shock absorber (1) comprises a thermoplastic polymer alloy of a polyolefin type resin and an amorphous resin.

Abstract: A method for manufacturing molded foam which uses cheap materials, is light in weight and which is excellent in impact resistance. In the method for manufacturing molded foam, propylene homopolymer with a long chain branch, propylene ethylene block copolymer and low density polyethylene are mixed in the base resin at a prescribed mixing ratio. A blowing agent is added to carry outfoaming. A prescribed mixing ratio is determined based on the value arrived at by a multiplying melt tension of each material mixed with the melt flow rate and the Tensile Rupture Elongation.

Abstract: The invention provides a molded foam molding method capable of obtaining a molded foam in which pinholes may not be formed with ease even when a blow ratio is high and which has a high expansion ratio. The invention also provides a molded foam which includes no pinholes, is reduced in weight, and is excellent in heat insulating property. The molding method includes blending a polypropylene-based resin having an equilibrium compliance from 2.0 to 6.0 (10?3×Pa?1) with a foaming agent and kneading the blend in an extruder. The extruded foamed resin is molded so as to be fit along a mold by a pressurized fluid. Moreover, the molded foam is formed by the method described above, and has an expansion ratio from 1.5 to 5.0 times and an impact strength of not less than 30 kg·cm.

Abstract: An object of the invention is to provide a method for manufacturing a molded foam which is lightweight and excellent in strength. According to the invention, a method for manufacturing a molded foam from a foamed parison includes: an extruding step of extruding a resin blend containing a foaming agent and a thermoplastic resin to form a foamed parison; an attaching step of closely attaching facing portions of an inner wall surface of the foamed parison to each other to form a foamed parison laminated body; a mold clamping step of sealing and mold clamping the foamed parison laminated body by clamping the foamed parison laminated body by split mold blocks; and a sucking step of sucking air between the split mold blocks to reduce a pressure between the split mold blocks, after the attaching step and the mold clamping step.

Abstract: [Problem] To provide a light-weight air conditioning duct for vehicle that is light in weight and excellent in mechanical strength. [Solution] The present invention is directed to a light-weight air conditioning duct for vehicle 1 for letting conditioned air supplied from an air conditioning unit pass through to a desired location, the duct being obtained by blow-molding a mixed resin including a polypropylene-based resin for foaming and a hydrogenated styrene-based thermoplastic elastomer, and the duct having an Izod impact strength equal to or larger than 10 J/m at ?20 degrees Celsius.

Abstract: An object of the invention is to provide a blow-molded foam which has homogeneous foamed cells in size, is light in weight, and is excellent in surface smoothness, and a process for producing the same. The invention is directed to a blow-molded foam 1 having a wall portion formed in such a manner that a thermoplastic resin containing a foaming agent mixed therewith is subjected to blow molding. Herein, the wall portion has a closed cell structure in which a plurality of foamed cells are contained. The wall portion has an expansion ratio of not less than 2.0 times. The wall portion has an outer face having a center-line average surface roughness Ra of less than 9.0 ?m. The foamed cell has a cell diameter having a standard deviation of less than 40 ?m in a thickness direction of the wall portion.

Abstract: [PROBLEMS] An impact absorption body for a vehicle can have desired impact absorption performance, exhibits excellent impact absorption performance particularly immediately after an impact is applied to the body, and can maintain high impact absorption performance. [MEANS FOR SOLVING PROBLEMS] The impact absorption body (1) for a vehicle is installed within a vehicle forming member and absorbs impact energy in a collision. The impact absorption body (1) has a first wall (4) placed on the side that receives an impact, a second wall (5) facing the first wall (4) with a hollow section (2) between them, and one or more impact absorption ribs (9) constructed from deep groove sections (15) and shallow groove sections (16). The deep groove sections (15) are formed by depressing the first wall (4) and second wall (5) into groove shapes and integrally joining the top surfaces, which function as fusion bonding surfaces, of the depressions.

Abstract: A vehicle shock absorber by which a uniform shock absorbing property can be obtained in all positions on a shock receiving surface and, particularly, a further uniform shock absorbing property can be obtained if the distance from the lower end of a recessed groove in a first wall to a second wall is made equal to the distance from the lower end of the recessed groove in the first wall to the lower end of a recessed groove in the second wall. A vehicle shock absorber (1) is installed inside a vehicle component part so as to absorb shocks from interior or exterior. The vehicle shock absorber (1) is formed hollow by blow-molding thermoplastic plastic. A first wall (2) and a second wall (3)are spaced from and opposed to each other. A shock receiving surface (4) connects the first and second walls (2, 3). The first and second walls (2, 3) are formed with pluralities of recessed grooves (5, 6) at substantially equally spaced intervals.