Toray Industries, Inc.

Toray Coatex Co., Ltd.

Hiroyasu Kato

Akira Nishimura

Hajime Kishi

Nobuyuki Odagiri

Hideo Nagata

Takeshi Terashita

Tokuo Tazaki

Kenkichi Yagi

Miyoshi Okamoto

Yukihiro Matsuzaki

Satoshi Yanagisawa

Kuniyasu Shiro

Hajime Nishimura

Yoshihiro Tomida

Masaharu Wada

Manabu Terao

A polishing pad is provided with a compression elastic modulus of 0.17 MPa or more and 0.32 MPa or less produced by preparing a nonwoven fabric formed of bundles of ultrafine fibers with an average monofilament diameter of 3.0 &#x3bc;m or more and 8.0 &#x3bc;m or less, preparing a polishing pad base by impregnating the nonwoven fabric with a polyurethane based elastomer in an amount of 20 mass % or more and 50 mass % or less relative to the mass of the polishing pad base, and laminating the polishing pad base with a porous polyurethane layer containing wet-solidified polyurethane as primary component which has openings with an average opening diameter of 10 &#x3bc;m or more and 90 &#x3bc;m or less in its surface to serve as polishing surface layer.

Polishing pad

A filter cloth comprising at least a base layer and a filtering layer, characterized in that the ratio T/L of the thickness (T) of the filtering layer to the length (L) of fibers of fiber bundles constituting the filtering layer is 0.02 to 0.7 and the sum of a projected area of the fibers onto the base layer surface is 8 to 350 times the area of the base layer surface and, a filter cloth characterized in being constituted with at least a base layer and a filtering layer mainly composed of fiber bundles of crimped fiber ratio over 5%. Again, a belt type solid-liquid separating machine characterized in being constituted with at least a mechanism in which the filter cloth of this invention is provided on a plurality of rollers and is moved therearound, a mechanism for supplying unfiltered water onto an inclined belt, a mechanism for sucking supplied unfiltered water from the rear surface of the belt, a mechanism for dewatering a cake formed on the belt by pressurizing the same, a mechanism for peeling off the dewatered cake and a mechanism for washing the belt. In addition, a filtering machine characterized in being constituted with at least a mechanism for partitioning inside and outside portions by providing the filter cloth of this invention around a drum or a disc-like structural member, a mechanism for passing water through the filter cloth by supplying unfiltered water to the partitioned outside or inside portion, a mechanism for washing the filter cloth from the unfiltered water supply side and/or the other side and a mechanism for discharging concentrated water produced by the washing.

Filtering machine and filter cloth therefor

Disclosed is a process of producing a prepreg which is suited for preparing honeycomb sandwich panels, by which the formation of pores in the interlayer zones in the cured composite can be reduced. The prepreg comprises a resin composition including an epoxy resin, a curing agent and a solid rubber, and a woven fabric made of reinforcing fibers, the meshes of the woven fabric being crushed such that said prepreg has a cover factor K.sub.p of 97-99.9%. Also disclosed is a reinforcing fabric comprising warps and woofs which are multifilament yarns made of carbon fibers, the widths W (mm) and finenesses D (d:denier) of the warp and woof satisfying the equation of:

Cloth prepreg, process for producing the same and reinforcing fabric

Disclosed is a prepreg which is suited for preparing honeycomb sandwich panels, by which the formation of pores in the interlayer zones in the cured composite can be reduced. The prepreg of the present invention comprises a resin composition including an epoxy resin, a curing agent and a solid rubber, and a woven fabric made of reinforcing fibers, the meshes of the woven fabric being crushed such that said prepreg has a cover factor K.sub.p of 97-99.9%. Also disclosed is a reinforcing fabric comprising warps and woofs which are multifilament yarns made of carbon fibers, the widths W (mm) and finenesses D (d:denier) of the warp and woof satisfying the equation of:

Method of making a reinforcing fabric comprising warps and woofs which are multifilament yarns made of carbon fibers. The widths W (mm) and finenesses D (d:denier) of the warps and woofs satisfy the equation:

Process for producing a woven carbon reinforcing fabric with a high

Disclosed is a reinforcing fabric comprising warps and woofs which are multifilament yarns made of carbon fibers, the widths W (mm) and finenesses D (d:denier) of the warp and woof satisfying the equation of:

An artificial grain leather sheet free of rubber-like elasticity and characterized by excellent softness and strength composed of ultrafine super-entangled synthetic fibers having a denier of less than about 0.5 and a resin. The sheet has a body portion and a grain surface portion wherein the ultrafine fibers are supertangled at a multiplicity of entangling points, with the average distance between entangling points being less than about 200 microns and the fiber density coefficient near the surface being greater than about 30.

Ultrafine fiber entangled sheet

Melange-colored sheet and method. The sheet has an inner portion having ultrafine fiber bundles and/or multi-core fibers. The surface of the sheet is composed of super-entangled ultrafine fibers and/or fine bundles of ultrafine fibers of different colors, branched from the fibers of the inner portion, so that the surface presents a melange-colored effect of at least two colors.

Melange-colored sheet and method of producing the same

An entangled non-woven fabric having a fiber structure which comprises a portion (A) in which ultrafine fiber bundles consisting of ultrafine fibers of a size of not greater than about 0.5 denier are entangled with one another and a portion (B) in which ultrafine fibers to fine bundles of ultrafine fibers branch from the ultrafine fiber bundles and are entangled with one another, and in which portions (A) and (B) are nonuniformly distributed in the direction of fabric thickness. The product of this invention has high flexibility as well as good shape retention. The invention also relates to a grained sheet having on at least one of its surfaces a grain formed by a fiber structure composed of ultrafine fibers to fine bundles of ultrafine fibers and having a distance between the fiber entangling points of not greater than about 200 microns, and a resin in the gap portions of the fiber structure. The grained sheet of the invention has high flexibility resistance, shearing fatigue resistance and scratch and scuff resistance.

Growing community of inventors

Otsu, Japan

Hiroyasu Kato