摘要:
A porous carbon base material includes a sheet containing carbon short fibers dispersed randomly and a carbonized resin, in which the carbon short fibers are bound by the carbonized resin and the volume of pores having a pore diameter of 10 μm or less is 0.05 to 0.16 cc/g. A method for producing this porous carbon base material includes intermittently transporting a precursor fiber sheet including short carbon fibers dispersed randomly and a resin to a space between heated plates, subjecting the precursor to a heating and pressuring treatment by the heated plates while the transformation stops, carrying out the transportation of the sheet after the treatment, and then carrying out a heat treatment, to thereby carbonize the resin in the sheet.
摘要:
A nonwoven fabric comprising flame-retardant acrylic fibers, characterized in that it has a weight per square-meter of 70 to 190 g/m2, a thickness of 0.1 to 0.3 mm, a density of 0.35 to 0.8 g/cm3; and a nonwoven fabric comprising carbon fibers, characterized in that it has a weight per square-meter of 50 to 150 g/m2, a thickness of 0.1 to 0.25 mm, a density of 0.3 to 0.7 g/cm3, a surface roughness Ra of 30 μm or less, a tensile strength of 0.2 kgf/cm or more, and a maximum fracture radius being defined in the specification of 20 mm or less. Said carbon fiber nonwoven fabric is produced by subjecting the flame-retardant acrylic fiber nonwoven fabric to a carbonization treatment and can be suitably used as a material for forming an electrode of a fuel cell.
摘要翻译:一种包含阻燃丙烯酸纤维的无纺织物,其特征在于其每平方米重量为70至190g / m 2,厚度为0.1至0.3mm,密度为0.35至 0.8g / cm 3; 以及包含碳纤维的无纺布,其特征在于,其每平方米重量为50至150g / m 2,厚度为0.1至0.25mm,密度为0.3至0.7g / cm 3,表面粗糙度Ra为30μm以下,拉伸强度为0.2kgf / cm以上,最大断裂半径在本说明书中规定为20mm以下。 所述碳纤维无纺布是通过对阻燃丙烯酸纤维无纺布进行碳化处理而制成的,并且可以适合用作形成燃料电池的电极的材料。
摘要:
A porous carbon base material includes a sheet containing carbon short fibers dispersed randomly and a carbonized resin, in which the carbon short fibers are bound by the carbonized resin and the volume of pores having a pore diameter of 10 μm or less is 0.05 to 0.16 cc/g. A method for producing this porous carbon base material includes intermittently transporting a precursor fiber sheet including short carbon fibers dispersed randomly and a resin to a space between heated plates, subjecting the precursor to a heating and pressuring treatment by the heated plates while the transformation stops, carrying out the transportation of the sheet after the treatment, and then carrying out a heat treatment, to thereby carbonize the resin in the sheet.
摘要:
An FRP curved pipe, particularly suitable for an FRP racket, good in resin flowability and deaeration at the time of molding, less in surface defects and excellent in strength can be obtained by a structure comprising an inner layer including a reinforcing fiber and an outer layer including a non-woven fabric having a single fiber diameter of not greater than 20 .mu.m and a weight per unit area of not greater than 100 g/m.sup.2.