摘要:
Rubber compositions of a selected base rubber and a specified paraffin was containing 50% or more of a normal paraffin and having a carbon area ratio of less than 4.0 as determined by gas chromatography within a carbon number range of from 23 to 42. The ratio is derived by counting a first paraffin content which is defined by the paraffin of maximum content in the wax and a second paraffin content which is defined by the paraffin of minimum content in the wax and thereafter dividing the first paraffin content by the second paraffin content. The composition is highly stable in initial tack with less dependence on temperature before curing.
摘要:
A rubber composition for use in steel-belted automobile tires containing specified amounts of a partial condensate of hexaethylolmelamine pentamethylether, a cresol resin, sulfur and a cobalt resin of an organic acid, thereby exhibiting improved adhesion to metal in warm water after vulcanization and increased extension on break after aging.
摘要:
A rubber composition for steel-belted automobile tires containing selected amounts of partial condensates of hexamethylolmelamine pentamethylether, cresol resin, sulfur and cobalt salts of organic acid, to improve its warm water to steel cords in the tire and increased tensile strength.
摘要:
A lead frame which is disposed in an outer package is composed of three members. The lead frame is provided with contact electrodes, connector terminals, and conductive interconnections which are connected to the respective connector terminals. The arrangement order of the contact electrodes is such that contact electrodes are connected to the connector terminals, respectively; that is, the arrangement direction of the contact electrodes is the same as that of the connector terminals. On the other hand, the arrangement order of the contact electrodes is such that contact electrodes are connected to the connector terminals, respectively, that is, the arrangement direction of the contact electrodes is opposite to that of the connector terminals. Lead terminals of a resin cell package are connected to the contact electrodes.
摘要:
A device for continuously measuring and correcting a tackiness of a sheet of rubber material including a feeding unit for continuously feeding an unvulcanized rubber sheet along a flat support surface and a rotatable roller in contact with the unvulcanized rubber sheet, whereby the roller is rotated by the movement of the unvulcanized rubber sheet, and entrained in the sheet feed direction due to a tackiness of the unvulcanized rubber sheet. A load cell is connected to the roller via a linkage, for measuring a resistance to the rolling of the roller, i.e., a change of a position of the roller entrained in the sheet feed direction. The device also includes a correcting unit for correcting a tackiness of the sheet of unvulcanized rubber material, the correcting unit being controlled by a control element in response to an output from the measuring unit, in such a manner that the correcting unit acts on the surface of the unvulcanized rubber sheet of rubber material when an output from the measuring unit is outside a predetermined range of tackiness.