摘要:
PROBLEM TO BE SOLVED: To improve heat insulating performance when achieving communication in urethane foam by uniformizing the urethane foam and preventing appearance deformation.SOLUTION: A heat insulating wall according to the present invention comprises: a hollow wall body in which a hollow portion is a heat insulating space; a gas flow ports (6) for causing the heat insulating space (10) arranged in the wall body to communicate with the outside; open-cell urethane foam (4) foamed so as to fill the heat insulating space of the wall body; and a sealing material (60) for sealing the gas flow ports. A heat insulating box body according to the present invention comprises: an outer box (2); an inner box (3) housed in the outer box; the gas flow ports (6) for causing the heat insulating space (10) arranged between the outer box and the inner box to communicate with the outside; the open-cell urethane foam (4) foamed so as to fill the heat insulating space; and the sealing material (60) for sealing the gas flow ports.
摘要:
PROBLEM TO BE SOLVED: To provide a lightweight and thin fiber-reinforced molding with superior high rigidity. SOLUTION: The fiber-reinforced molding is composed of a core material 11 and a fiber reinforcement material 21 laminated on both faces of the core material 11. The core material 11 is formed by curing a thermosetting resin in a compressed state of a thermosetting resin foam by impregnating the thermosetting resin foam having open cell with the thermosetting resin, and has a compressibility of 200-5000%. The fiber reinforcement material 21 is formed by impregnating a carbon fiber fabric with the thermosetting resin and curing and the resin ratio of the thermosetting resin after the impregnation is 50-80%. The core material 11 and fiber reinforcement material 21 are integrated by curing the thermosetting resin impregnated into the thermosetting resin foam and the thermosetting resin impregnated into the carbon fiber fabric. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a polyethylene-based resin foamed blow molded article having a high expansion ratio, heat resistance, low temperature brittleness and uniform thickness. SOLUTION: The polyethylene-based resin foamed blow molded article is obtained by melt-mixing 20 to 100 wt.% of a polyethylene-based resin (I) satisfying the following conditions and a physical blowing agent and extruding the resultant mixture to blow-mold a foamed parison. The polyethylene-based resin (I) has (A) density of ≥0.935 g/cm 3 , (B) a melt tension of ≥1 cN at 190°C, (C) a melt flow rate of ≥1 g/10 min as measured at 190°C under a load of 2.16 kg and (D) an isothermal crystallization time of ≥45 s at which one-quarter of a total fusion calorific value in a DSC (Differential Scanning Calorimetry) curve (X) becomes equal to an isothermal crystallization calorific value in a DSC curve (Y), wherein the DSC curve (X) is obtained by heating the polyethylene-based resin from 23°C to 160°C at a heating rate of 10°C/min, then cooling it to 23°C at a cooling rate of 10°C/min, and heating it to 200°C at a heating rate of 10°C/min again. the DSC curve (Y) is obtained by heating the polyethylene-based resin from 23°C to 160°C at a heating rate of 10°C/min, maintaining it at 160°C for 3 min, then cooling it to temperature equal to crystallization temperature of the resin +3°C at a cooling rate of 50°C/min, both curves (X) and (Y) being obtained by using a DSC method. COPYRIGHT: (C)2011,JPO&INPIT