Abstract: Provided is a double braid rope structure which is provided with an inner core and an outer cover. In the double braid rope structure (10), the inner core (3) includes high strength and high modulus fibers with a yarn tenacity of 20 cN/dtex or higher and a yarn elastic modulus of 400 cN/dtex or higher, and has a ratio of yarn length/rope length of 1.005 or more and 1.200 or less, the rope length being determined as a length of a cut section (V) cut to a certain length from the rope structure (10), and the yarn length being determined as an average value of lengths of yarns constituting the inner core of the cut section (V).

Abstract: A braid including a core part and a sheath part, wherein the core part includes a high strength fiber (a) having a fineness of 300 to 4,000 dtex and a tensile strength of 12 cN/dtex or more, and the sheath part includes a colored synthetic fiber (b) having a fineness of 60 to 1,000 dtex and a tensile strength of less than 12 cN/dtex. A volume ratio [av/bv] of the high strength fiber (a) constituting the core part to the colored synthetic fiber (b) constituting the sheath part is from 73/27 to 40/60. The sheath part has a braid-like structure.

Abstract: To provide a waterproof sheet for civil engineering, having sufficient strength and elongation even at a low temperature of about ?10° C. and having excellent adhesiveness to a structure such as a tunnel. Disclosed is a waterproof sheet for civil engineering, which has a layer (A) including a composition containing an ethylene-vinyl acetate copolymer (a1) and a thermoplastic resin (a2) other than the ethylene-vinyl acetate copolymer (a1), and a silica-containing layer containing silica, wherein the content of the ethylene-vinyl acetate copolymer (a1) in the composition is 30 to 95% by mass, the content of the thermoplastic resin (a2) is 5 to 70% by mass, and the absolute value of the difference between the SP value of the ethylene-vinyl acetate copolymer (a1) and the SP value of the thermoplastic resin (a2) is less than 0.70 (cal/cm3)1/2.

Abstract: A resin composition containing an ethylene-vinyl acetate copolymer (I) and a hydrogenated block copolymer (II), wherein the hydrogenated block copolymer (II) is a hydrogenated product of a block copolymer (P) containing a polymer block (A) containing a structural unit derived from an aromatic vinyl compound and a polymer block (B) containing 1 to 100% by mass of a structural unit (b1) derived from farnesene and 99 to 0% by mass of a structural unit (b2) derived from a conjugated diene other than farnesene, wherein the hydrogenation rate of carbon-carbon double bonds in the structural unit derived from a conjugated diene in the block copolymer (P) is 70 mol % or more, and in the resin composition, the content of the ethylene-vinyl acetate copolymer (I) is 40 to 95% by mass and the content of the hydrogenated block copolymer (II) is 5 to 60% by mass.

Abstract: A braid including a core part and a sheath part, wherein the core part includes a high strength fiber (a) having a fineness of 300 to 4,000 dtex and a tensile strength of 12 cN/dtex or more, and the sheath part includes a colored synthetic fiber (b) having a fineness of 60 to 1,000 dtex and a tensile strength of less than 12 cN/dtex. A volume ratio [av/bv] of the high strength fiber (a) constituting the core part to the colored synthetic fiber (b) constituting the sheath part is from 73/27 to 40/60. The sheath part has a braid-like structure.

Abstract: A braid including a core part and a sheath part, wherein the core part includes a high strength fiber (a) having a fineness of 300 to 4,000 dtex and a tensile strength of 12 cN/dtex or more, and the sheath part includes a colored synthetic fiber (b) having a fineness of 60 to 1,000 dtex and a tensile strength of less than 12 cN/dtex. A volume ratio [av/bv] of the high strength fiber (a) constituting the core part to the colored synthetic fiber (b) constituting the sheath part is from 73/27 to 40/60. The sheath part has a braid-like structure.

Abstract: Disclosed is a braid comprising a core part and a sheath part, wherein the core part comprises a high strength fiber (a) having a fineness of 300 to 4,000 dtex and a tensile strength of 12 cN/dtex or more, and the sheath part comprises a colored synthetic fiber (b) having a fineness of 60 to 1,000 dtex and a tensile strength of less than 12 cN/dtex, and the sheath part has a braid-like structure. The braid has excellent mechanical strength and can be colored in various colors, and preferably hardly causes reduction in mechanical strength even when exposed to an ultraviolet ray, and which hardly causes disappearance of the applied color even when subjected to mechanical friction.

Abstract: A method is for designing a structure in which a composite material including fibers and a resin is arranged as a damping material in a structure body. The method includes selecting a divided arrangement area in which the composite material is to be arranged, the divided arrangement areas being one of divided arrangement areas into which a composite material arrangement area of the structure in which the composite material is arrangeable is divided; selecting a lamination position where the composite material is to be arranged in a thickness direction of the structure; selecting a fiber direction of the fibers; and determining whether a design performance of the structure satisfies performance requirements, the design performance being derived from design parameters including at least the selected divided arrangement area, the selected lamination position, and the selected fiber direction.

Abstract: Provided is a dust scatter preventing agent capable of preventing scattering of dust for a long period of time, by improving the strength of a coating layer formed on a surface of a tailing at a tailing accumulation site. A dust scatter preventing agent comprising an aqueous solution or aqueous dispersion that includes a hydrophilic polymer such as polyvinyl alcohol or a synthetic resin emulsion that has a property of being solidified and that has a contact angle with water of 45 degrees to 78 degrees, and an insoluble fiber material such as vinylon that has a cut length that is within a range of 0.5 mm to 30 mm, and a fineness that is within a range of 0.1 dtex to 20 dtex, with an amount of the insoluble fiber material with respect to the hydrophilic polymer being 0.1 to 1 by mass ratio, is spread over a surface of an object that includes fine particles having a particle size of 100 ?m or less and hardened to form a coating layer on the surface of the object.

Abstract: Provided is a dust scatter preventing agent capable of preventing scattering of dust for a long period of time, by improving the strength of a coating layer formed on a surface of a tailing at a tailing accumulation site. A dust scatter preventing agent comprising an aqueous solution or aqueous dispersion that includes a hydrophilic polymer such as polyvinyl alcohol or a synthetic resin emulsion that has a property of being solidified and that has a contact angle with water of 45 degrees to 78 degrees, and an insoluble fiber material such as vinylon that has a cut length that is within a range of 0.5 mm to 30 mm, and a fineness that is within a range of 0.1 dtex to 20 dtex, with an amount of the insoluble fiber material with respect to the hydrophilic polymer being 0.1 to 1 by mass ratio, is spread over a surface of an object that includes fine particles having a particle size of 100 ?m or less and hardened to form a coating layer on the surface of the object.

Abstract: A flameproof spun yarn of the present invention includes a modacrylic fiber containing an antimony compound and a polyarylate-based fiber, and the flameproof spun yarn contains 1 to 30 wt % of the polyarylate-based fiber relative to the total weight of the flameproof spun yarn. A flameproof fabric of the present invention includes a modacrylic fiber containing an antimony compound and a polyarylate-based fiber, and the flameproof fabric contains 1 to 30 wt % of the polyarylate-based fiber relative to the total weight of the flameproof fabric. And clothes and flameproof work clothes of the present invention include the flameproof fabric. The present invention thereby provides at a low cost a flameproof spun yarn and a flameproof fabric having excellent designability and flameproofness, and clothes and a flameproof work clothes using the same.

Abstract: A flameproof spun yarn of the present invention includes a modacrylic fiber containing an antimony compound and a polyarylate-based fiber, and the flameproof spun yarn contains 1 to 30 wt % of the polyarylate-based fiber relative to the total weight of the flameproof spun yarn. A flameproof fabric of the present invention includes a modacrylic fiber containing an antimony compound and a polyarylate-based fiber, and the flameproof fabric contains 1 to 30 wt % of the polyarylate-based fiber relative to the total weight of the flameproof fabric. And clothes and flameproof work clothes of the present invention include the flameproof fabric. The present invention thereby provides at a low cost a flameproof spun yarn and a flameproof fabric having excellent designability and flameproofness, and clothes and a flameproof work clothes using the same.

Abstract: The present invention is a waterproof sheet for a tunnel containing a base sheet containing a synthetic resin having on a surface thereof a silica-containing surface layer containing silica having a silicon dioxide content of 90% by mass or more in a ratio of from 30 to 200 mg/cm3, formed over a depth of from 5 to 30 ?m from the surface of the waterproof sheet, and having a tensile breaking strength of 10 MPa or more and a mortar adhesion strength of 15 N/cm or more, and thus provides a waterproof sheet for a tunnel that forms no gap between the sheet and the concrete structure even when a prolonged period of time is elapsed from the installation, or the installed surface suffers large deterioration in evenness or levelness, ground subsidence or earthquake, and also does not cause problems including breakage and the like upon installation and after installation in the tunnel, thereby preventing smoothly water seeping from the earth or the ground from leaking into the tunnel.