摘要:
A sound absorbing structure comprising at least one porous member including a plurality of holes, and the holes are at least one kind of through holes and non-through holes. It is preferable that a plurality of porous members are stacked. It is also preferable that the holes of porous members are formed as diameter-varied holes, and an area of opening of each diameter-varied hole formed in the surface opposite to a sound source is largest and the area of opening of each the diameter-varied hole is reduced in a direction of the thickness of the porous member. Moreover, it is also preferable that the sound absorbing structure further comprises a coating film formed on at least a surface of the porous member which is opposite to a sound source wherein the holes penetrates the coating film and the porous member.
摘要:
A sound absorbing structure including a film with through holes formed is laminated on a porous member having communicating voids on the side facing a sound source. At least one of the through holes has an opening area of 19 mm2 or more, and the total of the opening area accounts for 1 to 70% with respect to the area of a film formation surface on the porous member. A soundproof cover including the sound absorbing structure disposed on the inner surface of a cover main body are also provided.
摘要:
A shape memory foam member is disclosed. A coefficient of water absorption of the shape memory foam member is in the range between 0.01 g/cm3 and 0.2 g/cm3 in a non-compressed state. The shape memory foam member is compressed with heating; cooled with keeping the shape memory foam member in the compressed state; and released from the compressive pressure on the shape memory foam member after cooling. The original shape of the shape memory foam member is substantially recovered by heating.
摘要翻译:公开了形状记忆泡沫构件。 形状记忆泡沫构件的吸水系数在非压缩状态下在0.01g / cm 3至0.2g / cm 3之间的范围内。 形状记忆泡沫构件被加热压缩; 冷却形状记忆泡沫构件处于压缩状态; 并且在冷却后从形状记忆泡沫构件上的压缩压力释放出来。 形状记忆泡沫构件的原始形状通过加热基本回收。
摘要:
In order to provide a damping material exhibiting an excellent vibration damping property in a wide temperature range, according to the present invention, in a magnetic composite type damping material constructed by bonding an adhesive elastic sheet containing magnetic powder to a constraining plate such as a metal plate by using an adhesive, the adhesive elastic sheet is made of a composite material consisting of rubber elastomer, adhesive resin, plasticizer, magnetic powder, etc.Since not only is the damping material having a construction described above attracted by magnetic force against a vibration source, it also is provided with a superficial adhesiveness, and the excellent vibration damping property is exhibited in a wide temperature range by a synergistic effect of the magnetic force and the adhering force.
摘要:
Disclosed is a rubber composition for fluorocarbons and/or refrigerating machine oil use, which comprises at least one of a nitrile group-containing rubber, a chloroprene rubber, and an ethylene propylene rubber as a base and at least one of an epoxy compound selected from the group consisting of a monofunctional epoxy compound, a glycidyl ether type epoxy compound and a glycidyl ether type epoxy compound and a compound represented by formula: ##STR1## wherein R.sup.1 represents a hydrogen atom or an alkyl group, R.sup.2 represents an alkyl group or a phenyl group, R.sup.3 represents an alkyl group, an alkoxy group or an alkenyloxy group, and n is 1 or 2.
摘要:
A chemical mechanical polishing aqueous dispersion comprises abrasives in a concentration of not more than 1.5% by mass, wherein the abrasives comprise ceria and have an average dispersed particle diameter of not less than 1.0 μm. A chemical mechanical polishing method comprises polishing an insulating film by the use of the chemical mechanical polishing aqueous dispersion. By the use of the chemical mechanical polishing aqueous dispersion, occurrence of polishing scratches can be suppressed without lowering a removal rate.
摘要:
A chemical mechanical polishing aqueous dispersion comprises abrasives (A) containing ceria, an anionic water-soluble polymer (B) and a cationic surfactant (C), wherein the amount of the anionic water-soluble polymer (B) is in the range of 60 to 600 parts by mass based on 100 parts by mass of the abrasives (A) containing ceria, and the amount of the cationic surfactant (C) is in the range of 0.1 to 100 ppm based on the whole amount of the chemical mechanical polishing aqueous dispersion.
摘要:
A method of manufacturing a semiconductor device uses a slurry for chemical polishing during the manufacturing process, the slurry containing polishing particles comprising colloidal particles whose primary particles have a diameter ranging from 5 to 30 nm, wherein the degree of association of the primary particles is 5 or less. This slurry for chemical mechanical polishing makes it possible to minimize erosion and scratching whenever a conductive material film is subjected to CMP treatment.
摘要:
A compressed non-asbestos sheet which comprises at least two types of fibers selected from the groups consisting of inorganic fibers other than asbestos and/or organic fibers, natural rubber and/or synthetic rubber, rubber chemicals, and fillers. The group of inorganic fibers is divided into two subgroups, one subgroup consisting of glass fibers, ceramic fibers, etc., and the other subgroup consisting of carbon and metal fibers. The group of organic fibers consists of synthesized and naturally occurring polymeric fibers including polyamide-based fibers, etc. The compressed non-asbestos sheet includes at least one of the combinations of the first and second subgroups, the first subgroup and the group of organic fibers, the second subgroup and the group of organic fibers, the fibers belonging to the second subgroup, and the organic fibers.
摘要:
The present invention relates to a floating structure to receive maritime production or drilling installations that is provided with means to reduce movement caused by the action of environmental forces on it. These means confer a more stable behavior on the structure's movements.