摘要:
The present invention provides a vehicle transmission having excellent sliding properties over the entire speed range of engines from a low speed range to a high speed range. The present invention is a vehicle transmission oil seal comprising: an elastic member with a seal lip portion having at least a main lip portion, wherein the elastic member is formed of a composition containing a fluororubber and a fluororesin and has projecting portions at least on a surface of the main lip portion, the projecting portions being substantially formed of the fluororesin contained in the composition, the fluororesin is a copolymer including a polymerization unit derived from ethylene and a polymerization unit derived from tetrafluoroethylene, and the fluororubber is a polymer including a polymerization unit derived from vinylidene fluoride.
摘要:
The present invention provides a laminated article having improved adhesion of the fluorine-containing resin layer to the elastomer layer. The laminated article comprises a fluorine-containing resin layer (a) formed using a fluorine-containing resin having a carbonyl group, an olefin group or an amino group at an end of a polymer trunk chain or an end of a polymer side chain, and an elastomer layer (b) formed using an elastomer composition.
摘要:
A seal ring with a sliding surface, which is obtained by molding a molding powder or granulated powder of non-melt-moldable modified polytetrafluoroethylene containing 0.01 to 1% by weight of a perfluorovinylether unit represented by the formula (I): —CF2—CF(—O—X)— (I) wherein X represents a perfluoroalkyl group having 1 to 6 carbon atoms or a perfluoroalkoxyalkyl group having 2 to 9 carbon atoms, the modified polytetrafluoroethylene having a heat of crystallization of 18 to 25J/g measured by a differential scanning calorimeter.
摘要:
A fuel hose including a laminated article having: a layer including a thermoplastic polymer composition which includes a fluororesin (A) including a fluorine-containing ethylenic polymer (a) and a crosslinked fluororubber (B) including a fluororubber (b) that has been at least partially crosslinked. The fluorine-containing ethylenic polymer (a), the at least partially crosslinked fluororubber (b) and a weight ratio of the fluororesin (A) to the crosslinked fluororubber (B) are as defined herein. A fuel permeation coefficient and a tensile modulus of elasticity of a molded article including the thermoplastic polymer composition is not more than 20 g·mm/m2·day and is not more than 400 MPa. The fuel hose further includes a layer including at least one crosslinked rubber.
摘要翻译:1.一种燃料软管,其具有层叠体,所述层叠体具有:包含热塑性聚合物组合物的层,所述热塑性聚合物组合物包含含有含氟乙烯性聚合物(a)的氟树脂(A)和包含氟橡胶(b)的交联氟橡胶(B) 最少部分交联。 含氟乙烯性聚合物(a),至少部分交联的氟橡胶(b)和氟树脂(A)与交联氟橡胶(B)的重量比如本文所定义。 包含该热塑性聚合物组合物的模制品的燃料透过系数和拉伸弹性模量不大于20g·mm / m 2·天,不大于400MPa。 燃料软管还包括包含至少一种交联橡胶的层。
摘要:
A coating film (43) in which a plurality of fluoric resin particles (45) are dispersed in a matrix resin (44) is formed on the surface of a base material (41). Each exposed part (45a) of the fluoric resin particles (45) which is exposed at the surface of the coating film (43) is crushed to expand therearound to increase the area of the exposed part, increasing the amount of a fluorine element existing in a sliding face portion.
摘要:
In a scroll compressor, a thrust ring is mounted between a movable-side flat plate part of a movable scroll and a housing. An upper surface of the thrust ring slides relative to a lower surface of the movable-side flat plate part and supports a thrust load from the movable scroll. A resinous coating is formed on the upper surface of the thrust ring which slides relative to the movable-side flat plate part. The resinous coating is composed primarily of fluorocarbon resin and polyamide-imide resin. The component percentage of the polyamide-imide resin in the primary component of the resinous coating is set, such that it is not less than 65% by mass nor more than 85% by mass.
摘要:
In a scroll compressor, a thrust ring is mounted between a movable-side flat plate part of a movable scroll and a housing. An upper surface of the thrust ring slides relative to a lower surface of the movable-side flat plate part and supports a thrust load from the movable scroll. A resinous coating is formed on the upper surface of the thrust ring which slides relative to the movable-side flat plate part. The resinous coating is composed primarily of fluorocarbon resin and polyamide-imide resin. The component percentage of the polyamide-imide resin in the primary component of the resinous coating is set, such that it is not less than 65% by mass nor more than 85% by mass.
摘要:
There is provided a crosslinkable fluorine-containing rubber composition being capable of giving a fluorine-containing rubber crosslinked and molded article having a low friction coefficient and assuring an increased proportion of a fluorine-containing resin around the surface of a fluorine-containing rubber, a molded article obtained by crosslinking the composition, and a method for producing the molded article. The crosslinkable fluorine-containing rubber composition comprises a fluorine-containing rubber (A) comprising vinylidene fluoride unit, a fluorine-containing resin (B) and a polyol crosslinking agent (C),wherein the fluorine-containing rubber (A) and the fluorine-containing resin (B) are kneaded at a temperature of not less than a temperature being lower by 5° C. than the melting point of the fluorine-containing resin (B).
摘要:
The present invention provides a vehicle engine oil seal having excellent sliding properties over the entire rotation range of engines from a low rotation range to a high rotation range. The present invention is a vehicle engine oil seal comprising: an elastic member with a seal lip portion having at least a main lip portion, wherein the elastic member is formed of a composition containing a fluororubber and a fluororesin and has projecting portions at least on a surface of the main lip portion, the projecting portions being substantially formed of the fluororesin contained in the composition, the fluororesin is a copolymer including a polymerization unit derived from ethylene and a polymerization unit derived from tetrafluoroethylene, and the fluororubber is a polymer including a polymerization unit derived from vinylidene fluoride.
摘要:
The present invention provides a vehicle valve stem seal having both durability and sliding properties at an extremely high level in addition to usual sealing performance. The present invention is a vehicle valve stem seal comprising an elastic member with a seal lip portion on an end of a valve stem guide, the seal lip portion slidably closely contacting with a valve stem of an engine, wherein the elastic member is formed of a composition containing a fluororubber and a fluororesin and has projecting portions at least on a surface of the seal lip portion, the projecting portions being substantially formed of the fluororesin contained in the composition, the fluororesin is a copolymer including a polymerization unit derived from ethylene and a polymerization unit derived from tetrafluoroethylene, and the fluororubber is a polymer including a polymerization unit derived from vinylidene fluoride.