摘要:
A sealing part formed a peroxide vulcanizate of a rubber compound having as a polymer component an EPDM mixture of 50 to 90 parts by weight of an EPDM having a Mooney viscosity (ML.sub.1+4 100.degree. C.) of 35 to 55, and 50 to 10 parts by weight of a low-Mooney EPDM (a sub-polymer) having a Mooney viscosity (ML.sub.1+4 100.degree. C.) of 5 to 25. The sealing part of the present invention has a high resistance to low-temperature compression permanent strain and is excellent in the kneadability of a rubber compound for producing the sealing part.
摘要:
The object of the present invention is to provide a method of reclaiming crosslinked rubber wherein a reduction of qualities due to generation of decomposed products hardly occurs, and a molding of reclaimed rubber. In a reclamation step of reclaiming crosslinked rubber 10 by applying shear stress thereto and/or in a subsequent step in the present invention, a degasification carrier is introduced and decomposed products in the crosslinked rubber 10 are removed together with the degasification carrier. Also the disclosed is a molding of reclaimed rubber prepared by re-crosslinking reclaimed rubber obtained by this method.
摘要:
This invention is directed to a fur-like pile fabric of two-layer construction formed of guard hair fibers and under-fur fibers and used as artificial fur and a method for the production thereof.This invention produces a pile fabric 1 possessing guard hair fibers 2 having sharpened leading terminals and under-fur fibers having a satisfactorily uniform length by a method that comprises preparing a pile knitted or woven fabric with a pile yarn obtained by mixing limited-length polyester type fibers for guard hair fibers of sharpened terminals with limited-length polyester type fibers more susceptible to the action of an alkali treating agent and used for under-fur fibers, imparting an alkali treating agent 6 of a specific viscosity to the hair-raised surface of the pile knitted or woven fabric, and thereafter heat-treating the alkali-treated fabric thereby shortening the under-fur fibers and sharpening the leading terminals of the under-fur fibers.
摘要:
The present invention provides a rubber composition containing a reclaimed rubber and a method for producing the same. A rubber molded article having excellent rubber properties can be obtained and the recycling of a used rubber product can be promoted by the present invention. A rubber composition of the present invention is a blend comprising a claimed rubber obtained by applying a heat and a shear stress to a vulcanized rubber, a non-vulcanized virgin rubber or/and a thermoplastic resin, wherein the reclaimed rubber contains 40% by weight or more of a residual toluene-insoluble gel component and the network chain density of the rubber in the gel component is 1/20 to 1/4 based on the network chain density of the rubber of the vulcanized rubber.
摘要:
An automobile weather strip including at least (a) a weather strip body formed from a first composition including at least one rubber polymer and at least one chemical suitable for effecting sulfur-vulcanization, and (b) a decorative layer formed from a second composition including at least one thermoplastic elastomer and hydrotalcite as a discoloration-preventing agent for the decorative layer. The decorative layer is directly adhered onto the weather strip body.
摘要:
A refractory for steel casting comprising, based on the total weight of the refractory in each case, 5-80% by weight of ZRM, 10-40% by weight of carbon powder, 0-20% by weight of one or more of SiC, Si.sub.3 N.sub.4, metallic silicon and ferrosilicon, 0-30% by weight of fused silica and 0-60% by weight of alumina powder containing at least 70% by weight of Al.sub.2 O.sub.3 based on the total weight of the alumina powder. The ZRM includes the main mineral phase consisting of mullite, baddeleyite and corundum and having the chemical composition consisting of 25-85% by weight of Al.sub.2 O.sub.3, 10-70% by weight of ZrO.sub.2 and 5-25% by weight of SiO.sub.2. A process for producing the refractory for steel casting.
摘要翻译:一种用于钢铸件的耐火材料,包括基于每种情况下耐火材料的总重量为5-80重量%的ZRM,10-40重量%的碳粉末,0-20重量%的一种或多种SiC ,Si 3 N 4,金属硅和硅铁,0-30重量%的熔融二氧化硅和0-60重量%的含有至少70重量%Al 2 O 3的氧化铝粉末,基于氧化铝粉末的总重量。 ZRM包括由莫来石,赤铁矿和刚玉组成的主要矿物相,其化学组成由25-85重量%的Al 2 O 3,10-70重量%的ZrO 2和5-25重量%的SiO 2组成。 铸钢用耐火材料的制造方法。
摘要:
The object of the present invention is to provide a method of reclaiming crosslinked rubber, which can reclaim various kinds of crosslinked rubbers whose reclamation is difficult. The method of reclaiming crosslinked rubber 10 of the present invention includes a step of reclaiming crosslinked rubber by applying shear stress to the crosslinked rubber 10, wherein the maximum pressure in the reclaiming step is 1.5 MPa or more.
摘要:
A fiber structure comprising cellulose fibers crosslinked by using a crosslinking agent and synthetic fibers, characterized in that the crosslinking index represented by the following formula of the cellulose fibers is in a range of 1 to 4, and that the synthetic fibers contain an antimicrobial agent having an inorganic value/organic value ratio of 0.3 to 1.4. This structure has antimicrobial property excellent in industrial washing durability and also has shape stability such as crease resistance and shrinkage resistance. Crosslinking index=A−B where A is the coefficient of moisture absorption of the fiber structure after crosslinking in an atmosphere of 30° C. and 90% RH (%), and B is the coefficient of moisture absorption of the fiber structure after crosslinking in an atmosphere of 20° C. and 65% RH (%).
摘要:
The present invention provides a rubber composition containing a reclaimed rubber and a method for producing the same. A rubber molded article having excellent rubber properties can be obtaining and the recycling of a used rubber product can be promoted by the present invention. A rubber composition of the present invention is a blend comprising a reclaimed rubber obtained by applying a heat and a shear stress to a vulcanized rubber, a non-vulcanized virgin rubber or/and a thermoplastic resin, wherein the reclaimed rubber contains 40% by weight or more of a residual toluene-insoluble gel component and the network chain density of the rubber in the component is 1/20 to 1/4 based on the network chain density of the rubber of the vulcanized rubber.
摘要:
This application relates to a fibre structure which has, on the fibre surface, a complex oxide comprising titanium and silicon, plus a binder. In particular, it relates to a fibre structure which preferably has, on the fibre structure, a complex oxide comprising titanium and silicon, and at least one type of binder selected from alkyl silicate resins, other silicone resins and fluororesins, and it provides a fibre structure having durable deodorant properties, antibacterial properties, antifungal properties or antisoiling properties.