摘要:
A reinforced pipe (6), e.g., of an epoxy resin, reinforced with fibers, e.g., of carbon or glass, is made preferably by filament or tape winding around a mandrel. A metal connecting fitting (2) for the end of a drive shaft, e.g., a yoke or bearing, has serration (4) formed on the surface of its connecting portion and the pipe and fitting are press-fitted together. To obtain firm connection, between the connecting surfaces there is interposed a foil or film (5), e.g., a surface-roughened metal foil. Adhesive can also be used. In the illustrated embodiment the fitting (2) has serration (4) externally and is fitted inside the pipe (6); a polymeric film (5) can then be integral with the pipe (6) by laying the film on the mandrel before the pipe-forming. The serration (4) is of elongated splines extending axially and can have a cross-section as in Fig. 2. There is thus made a torque-transmitting drive shaft (1) of low weight and high strength and suitable for use in an automobile or ship.
摘要:
Provided is a porous film obtained by melt-kneading a high-molecular-weight polyolefin having a weight-average molecular weight of not less than 5 x 10 5 , a thermoplastic resin having a weight-average molecular weight of not more than 2 x 10 4 and fine particles, molding the kneaded matter into a sheet, and then stretching the sheet. The porous film can be easily and simply prepared, and has a high piercing strength, and hence can be advantageously used as a separator for a battery, particularly for a lithium secondary battery.
摘要:
Provided is a porous film obtained by melt-kneading a high-molecular-weight polyolefin having a weight-average molecular weight of not less than 5 x 10 5 , a thermoplastic resin having a weight-average molecular weight of not more than 2 x 10 4 and fine particles, molding the kneaded matter into a sheet, and then stretching the sheet. The porous film can be easily and simply prepared, and has a high piercing strength, and hence can be advantageously used as a separator for a battery, particularly for a lithium secondary battery.
摘要翻译:本发明提供一种通过将重均分子量不小于5×10 5的高分子量聚烯烃熔融捏合得到的多孔膜,重均分子量不大于2的热塑性树脂 x 10 4和细颗粒,将捏合物成型为片材,然后拉伸片材。 多孔膜可以容易且简单地制备,并且具有高的刺穿强度,因此可以有利地用作电池的隔板,特别是用作锂二次电池。
摘要:
A separator for a non-aqueous electrolyte secondary battery, wherein the separator comprises a shut-down layer, a heat-resistant microporous layer, and a spacer having the form of particles, fibers, net or porous film on the surface of the heat-resistant microporous layer. The separator has a shut-down function, heat-resistance and excellent electrochemical oxidation resistance, and a battery having improved safety can be produced.
摘要:
Provided is a porous para-oriented aromatic polyamide film which contains fine particles composed of a heat-resistant resin in an amount of 10 to 400 parts by weight based on 100 parts by weight of a pare-oriented aromatic polyamide and has a linear thermal expansion coefficient at 200 to 300°C of from -50x10 -6 /°C to +50x10 -6 /°C. The porous para-oriented aromatic polyamide film shows excellent tear propagation resistance and has light weight and low linear thermal expansion coefficient, and is suitable as a prepreg material used for a base substrate for printed circuit board.
摘要:
A separator for a non-aqueous electrolyte secondary battery, wherein the separator comprises a shut-down layer, a heat-resistant microporous layer, and a spacer having the form of particles, fibers, net or porous film on the surface of the heat-resistant microporous layer. The separator has a shut-down function, heat-resistance and excellent electrochemical oxidation resistance, and a battery having improved safety can be produced.
摘要:
Drive shaft (1) composed of a fiber reinforced plastic pipe and fitting(s) pressed thereinto. The connecting portion (2) of the pipe, to be fitted over the fitting (3), and the connecting portion (7) of the fitting (3), to be fitted into the connecting portion (2) of the pipe, have similar cross sectional shapes. The ratio of : the inside diameter of the cross section of the connecting portion (2) of the pipe, to : the outside diameter of the cross section of the connecting portion (7) of the fitting, being comprised between 0,98 and 1,00.