摘要:
A biaxially orientated laminated polyester film having at least two layers, at least one outermost layer of which contains 0.1 to 5.0 % by weight of aluminum oxide particles (A) having an average primary particle size of 5 to 40 nm and 0.3 to 10 % by weight of particles (B) having an average primary particle size of 10 to 100 nm which are other than aluminum oxide particles, wherein an existence probability of discrete primary particles of the particles (A) and (B) in the outermost layer is not larger than 50 %, the outermost layer has a surface roughness Ra of 5 to 25 nm, and a ratio of a height Rt of the largest protuberance to Ra (Rt/Ra) is not larger than 15, which film has good smooth slipping properties and running durability and suitable as a base film of a magnetic recording medium.
摘要:
The present invention concerns a surface coating sliding member made of rubber or plastic applied with a coating of excellent durability and high sliding property, in which the coating contains a solid lubricant such as molybdenum disulfide and a resin matrix, wherein the resin matrix comprises a fluoro-olefin vinyl ether polymer resin and/or fluoro-olefin vinyl ether vinyl ester copolymer.
摘要:
@ Polymer compositions which have a reduced coefficient of friction are disclosed. The polymer compositions comprise a blend of at least 80 percent by weight of a solid of film-forming polymer and at least 0.35 percent by weight of a crosslinked hydroxy-containing silicone compound. The composition retains its low coefficient of friction even after being exposed to hydrocarbon solvents during a cleaning process. The composition may be used in forming a protective layer for an element, particularly a photographic element. The composition is particularly suitable in forming a protective layer for a motion picture photographic element.
摘要:
It is an object of the present invention to provide a sliding member, a rolling bearing, and a cage each having a sliding surface excellent in a sliding property thereof even in the presence of lubricating oil and under conditions of a high sliding speed and a high contact pressure. The sliding member is used under an oil lubrication environment and has a sliding layer formed on an iron-based metal material. The sliding layer consists of a foundation layer including heat-resistant resin and a first fluororesin layer both formed on a surface of the iron-based metal material. A second fluororesin layer is formed on a surface of the foundation layer. After the foundation layer and the second fluororesin layer are calcined, the second fluororesin layer is irradiated with radiation rays. The heat-resistant resin does not thermally decompose when the foundation layer and the second fluororesin layer are calcined. The second fluororesin layer is irradiated with the radiation rays in a condition in which the second fluororesin layer is crosslinked.
摘要:
Disclosed is a sliding contact surface-forming material (12) having minimal swelling and excellent friction-proof and wear-proof characteristics when used in moist environments such as in water, and improved in the friction-proof and wear-proof characteristics under dry friction conditions such as in the open air, particularly under oscillation conditions for testing journal, the sliding contact surface-forming material comprising a reinforcing base impregnated with a resol-type phenolic resin having polytetrafluoroethylene resin dispersed therein, the reinforcing base being composed of a woven fabric formed by using, respectively as the warp and the weft, a ply yarn which is formed by paralleling at least two strands of a single twist yarn spun from fluorine-containing resin fiber and a single twist yarn spun from polyester fiber, and by twisting them in the direction opposite to the direction in which the single twist yarns were spun; and further disclosed is a multi-layered sliding contact component having the overall shape of a flat plate or a circular cylinder, and having the above-described sliding contact surface-forming material so as to configure at least the sliding-contact surface thereof.