摘要:
A stretched film of polypropylene which is excellent in transparency, substantially free of an antiblocking agent and at least uniaxially stretched and which is characterized in that it has uniformly distributed projections having a height ranging from 0.05 to 0.50 .mu. and a width ranging from 10 to 100 .mu. at least on the surface thereof as well as a method for preparing the foregoing stretched film of polypropylene which comprises the steps of forming, into a sheet, polypropylene which comprises a nucleating agent in an amount selected so that the crystallization temperature of polypropylene is increased by 1.degree.to 10.degree. C. by the addition thereof and then stretching the sheet at a temperature ranging from 140.degree. to 165.degree. C. are herein disclosed.
摘要:
The invention provides a polymeric insulating material having a high dielectric breakdown voltage. The material comprises polypropylene which has been obtained in a yield of at least 300,000 g/g-Ti based on titanium in a catalyst upon polymerization, contains ash in an amount not greater than 40 ppm by weight when analyzed by completely burning the polypropylene in air, said ash containing titanium in an amount not greater than 1 ppm by weight based on the weight of the polypropylene, and also contains chlorine in an amount not greater than 2 ppm by weight and boiling n-heptane soluble matter in an amount not smaller than 1 wt. % but not greater than 10 wt. %. To further improve the dielectric breakdown voltage an inorganic oxide or hydroxide free of particles of 10 .mu.m and greater in diameter and having an average particle size not greater than 1 .mu.m, an organopolysilane, a maleic-anhydride-grafted polypropylene, or a silane compound containing at least one organic polyether group can be added to the polypropylene.
摘要:
The invention provides a polymeric insulating material having a high dielectric breakdown voltage. The material comprises polypropylene which has been obtained in a yield of at least 300,000 g/g-Ti based on titanium in a catalyst upon polymerization, contains ash in an amount not greater than 40 ppm by weight when analyzed by completely burning the polypropylene in air, said ash containing titanium in an amount not greater than 1 ppm by weight based on the weight of the polypropylene, and also contains chlorine in an amount not greater than 2 ppm by weight and boiling n-heptane soluble matter in an amount not smaller than 1 wt. % but not greater than 10 wt. %. According to the invention, it is possible to further improve the dielectric breakdown voltage by adding to the polypropylene an inorganic oxide or hydroxide free of particles of 10 .mu.m and greater in diameter and having an average particle size not greater than 1 .mu.m, an organopolysilane, a maleic-anhydride-grafted polypropylene, or a silane compound containing at least one organic polyether group.
摘要:
Provided herein is a propylene-ethylene copolymer composition which comprises (a) 10 to 25 parts by weight of a first propylene-ethylene copolymer containing 90 wt % or more of ethylene and (b) 75 to 90 parts by weight of a second propylene-ethylene copolymer containing 0.5 to 2.5 wt % of ethylene, the first copolymer having intrinsic viscosity of .eta..sub.a and the second copolymer having an intrinsic viscosity of .eta..sub.b, said intrinsic viscosities being defined by .eta..sub.a -.eta..sub.b =-0.2 to +1.2 dl/g.
摘要:
After an insulating film serving as a gate insulating film is formed on a semiconductor substrate, a titanium nitride film is deposited by chemical vapor deposition on the insulating film. Then, a tungsten film is deposited by sputtering on the titanium nitride film. Subsequently, a multilayer film composed of the tungsten film and the titanium nitride film is patterned to form a gate electrode composed of the multilayer film.
摘要:
An activated carbon having a high catalytic activity as an oxidation catalyst or a decomposition catalyst, and use therefor are provided.The activated carbon has (a) an oxygen content in a range from 1.40 to 4.30% by mass, (b) a nitrogen content in a range from 0.90 to 2.30% by mass, (c) a sulfur content in a range from 0.50 to 1.20% by mass, and (d) a hydrogen content in a range from 0.40 to 0.65% by mass. The activated carbon may have at least one characteristic of (e) an amount of an acidic surface functional group of 0.10 to 0.36 meq/g, (f) an amount of a basic surface functional group of 0.50 to 1.30 meq/g, and (g) a benzene adsorption capacity of 25 to 50%. The activated carbon catalyzes an oxidation reaction of N-(phosphonomethyl)iminodiacetic acid with a peroxide (e.g., hydrogen peroxide) and achieves an efficient production of N-(phosphonomethyl)glycine even after repetitive use. The activated carbon also efficiently decomposes a chloramine.
摘要:
A vehicle body side part structure having high strength against a load in a frontal collision and a load in a side collision. A side panel outer member (14) is provided with a front pillar lower section (31) which is formed from a high-tensile steel sheet, a front pillar upper section (37a) which is formed from a normal steel sheet, and a reinforcement member (38) which is disposed along the front pillar upper section. The upper end (31a) of the front pillar lower section (31) is joined to the inner surface of the lower end (37c) of the front pillar upper section. The front end (38a) of the reinforcement member (38) is joined to the inner surface of the upper end (31a) of the front pillar lower section.
摘要:
A microchannel device is provided, the microchannel device containing a microfluidic channel including a sub fluidic channel in which at least one filtration diaphragm is provided, wherein the microfluidic channel has at least a supply port, a first discharge port and a second discharge port, the supply port and the first discharge port are connected through the filtration diaphragm, the supply port and the second discharge port are connected without the filtration diaphragm, and the filtration diaphragm is provided parallel to a fluidic channel direction of the microfluidic channel.
摘要:
A fuel cell includes an electrolyte electrode assembly and separators. A first protection layer is formed on a surface of an anode of the electrolyte electrode assembly facing the separator for preventing the anode from being exposed to an exhaust gas. A second protection layer is formed on a surface of the separator facing the anode for preventing the separator from being exposed to the exhaust gas. The first protection layer and the second protection layer tightly contact each other in part so as to form a space as a fuel gas channel for supplying a fuel gas to the anode. Alternatively, a protection layer is formed on an end surface of the separator facing the anode for preventing the separator from being exposed to the exhaust gas.
摘要:
A snowmobile includes a throttle motor that is protected from brake dust. The snowmobile includes a snowmobile body including an engine room therein, an engine disposed inside the engine room, brake equipment disposed inside the engine room, a throttle valve arranged to adjust intake air supplied to the engine, and a throttle motor which is disposed at a more forward position than the brake equipment inside the engine room and arranged to drive the throttle valve.