摘要:
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 μm 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.
摘要翻译:本发明是一种用于隧道的防水片材,其包含含有合成树脂的基片,其表面上具有含二氧化硅的二氧化硅表面层,二氧化硅含量为90质量%以上,比例为30〜 200mg / cm 3,从防水片的表面形成5〜30μm的深度,拉伸断裂强度为10MPa以上,砂浆粘合强度为15N / cm以上,因此提供 用于隧道的防水片,即使在从安装中经过较长时间之后也不会形成片材和混凝土结构之间的间隙,或者安装的表面在均匀度或水平度,地面沉降或地震中遭受大的劣化,并且还 在安装和安装在隧道中时不会造成包括断裂等的问题,从而防止地球或地面的平滑的水渗入隧道。
摘要:
Multilayered moldings, which comprise a laminate structure of (A) a layer of a polyphenylene sulfide resin (hereinafter referred to as PPS resin) composition and (B) a layer of a thermoplastic resin except PPS resins and which are characterized in that the PPS resin composition constituting the layer (A) comprises (A1) 100 parts by weight of a PPS resin, (A2) from 1 to 80 parts by weight of a thermoplastic resin having at least one functional group selected from epoxy groups, acid anhydride groups, carboxyl group and its salts, and carboxylate groups, and (A3) from 5 to 80 parts by weight of a thermoplastic resin that is similar in kind to the thermoplastic resin constituting the layer (B), have good hot water resistance, antifreeze resistance, chemical resistance, heat resistance, abrasion resistance, gas permeation resistance and interlayer adhesion.
摘要:
An injection molded body includes a fiber reinforced thermoplastic resin composition formed by combining fibrous filler with thermoplastic resin so that the weight average fiber length in the injection molded body is 300 μm or more, and the injection molded body has a skin layer, a core layer and a skin layer in this order in the thickness direction. The thickness of the core layer, in which the primary orientation direction of the fibrous filler is 40° or less when the direction perpendicular to the flow direction of the resin composition at the time of injection molding is set at 0°, is 20% or less relatively to the thickness of the injection molded body.
摘要:
The present invention is a polyphenylene sulfide resin composition comprising (a) a polyphenylene sulfide resin and (b) an olefin-based resin, and satisfying the following conditions (i) through (v): (i) The mixing ratio of the polyphenylene sulfide resin (a) and the olefin-based resin (b) is such that the amount of the polyphenylene sulfide resin (a) is in a range from 95 to 60 wt %, while the amount of the olefin-based resin (b) is in a range from 5 to 40 wt %, with the total weight of both the ingredients as 100 wt %; (hi) said olefin-based resin (b) comprising two copolymer: (b-1) an epoxy group-containing olefin copolymer and (b-2) an ethylene/(α-olefin copolymer obtained by copolymerizing ethylene and an α-olefin having 3 to 20 carbon atoms; (iii) as the morphology observed by an electron microscope, said polyphenylene sulfide resin (a) forms a continuous phase, and said olefin-based resin (b) forms a dispersion phase and has a core-shell structure having said ethylene/α-olefin copolymer (b-2) acting as a core component contained in said epoxy group-containing olefin copolymer (b-1) acting as a shell component: (iv) the melt flow rate measured at a temperature of 315.5° C. and at a load of 5000 g according to ASTM-D-1238 is in a range from 10 to 50 g/10 min; and (v) the notched impact strength measured at −40° C. according to ASTM-D-256 is 300 J/m or more. This invention provides a PPS resin composition excellent in flowability, impact properties and low-temperature roughness and suitable for injection molding.
摘要:
An electroconductive, multilayered hollow molding comprising at least two thermoplastic resin layers, in which at least one layer is a layer of (a) a thermoplastic resin composition consisting essentially of a polyphenylene sulfide resin; one layer is a layer of (b) a thermoplastic resin composition consisting essentially of a thermoplastic resin other than a polyphenylene sulfide resin; and at least one of the layers is a layer of an electroconductive, thermoplastic resin composition comprising an electroconductive filler and/or an electroconductive polymer, and a thermoplastic resin.
摘要:
A method of manufacturing a fiber-reinforced plastic includes placing a compressible reinforcing fiber base material made of discontinuous reinforcing fibers in a cavity of a mold, injecting melted thermoplastic resin into the cavity, and impregnating the resin into the reinforcing fiber base material, wherein the mold is adapted to change a cavity volume of the mold, and the reinforcing fiber base material after having been or while being impregnated with the thermoplastic resin is compressed in the cavity by reducing the cavity volume of the mold after injecting the melted thermoplastic resin.
摘要:
A method of manufacturing a fiber-reinforced plastic includes placing a compressible reinforcing fiber base material made of discontinuous reinforcing fibers in a cavity of a mold, injecting melted thermoplastic resin into the cavity, and impregnating the resin into the reinforcing fiber base material, wherein the mold is adapted to change a cavity volume of the mold, and the reinforcing fiber base material after having been or while being impregnated with the thermoplastic resin is compressed in the cavity by reducing the cavity volume of the mold after injecting the melted thermoplastic resin.
摘要:
An injection molded body includes a fiber reinforced thermoplastic resin composition formed by combining fibrous filler with thermoplastic resin so that the weight average fiber length in the injection molded body is 300 μm or more, and the injection molded body has a skin layer, a core layer and a skin layer in this order in the thickness direction. The thickness of the core layer, in which the primary orientation direction of the fibrous filler is 40° or less when the direction perpendicular to the flow direction of the resin composition at the time of injection molding is set at 0°, is 20% or less relatively to the thickness of the injection molded body.
摘要:
An elevator installed in an elevator shaft has a cage, a counterweight, hoist cables suspending the cage and the counterweight, and a driving unit disposed outside a space in which the cage moves vertically in the elevator shaft, and provided with drive sheaves around which the hoist cables are wound to move the cage and the counterweight in the elevator shaft by the driving unit. The hoist cables are wound around the drive sheaves and sheaves supported on the cage and the counterweight in two-to-one roping arrangement such that the driving unit is at a level below the ceiling of the cage as located at its uppermost position. The cage-side sheaves are disposed at four positions on the lower portion of the cage respectively and symmetrically with respect to a center of gravity of the cage in a top plan view.
摘要:
A novel method to construct a reinforcing block in an embankment is provided, wherein a core rod to which a protrusion is molded on the tip, is preset inside a hollow rotating shaft with drilling and agitating blades affixed around its circumference, but with the protrusion on the core rod exposed at the front of the shaft. This drilling and agitating shaft rotates and bores into the earth while simultaneously mixing the soil so agitated with a fixing agent; then at a specified depth, the rotating shaft is withdrawn leaving the core rod to remain anchored in the soil while the fixing agent continues to discharge from the end of the hollow rod; and when the hollow rod is completely removed, a reinforcing block is intact within the soil and the tail end of the core rod exposed on the surface of the banking is directly or indirectly affixed to this surface. Alternatively a core rod with no protrusion can be inserted into the hollow rotating shaft which is first drilled into the embankment, such that the nose end of the said core rod is anchored into unagitated soil. In either case the reinforcing block so formed is comprised of an outer concentric tube of agitated soil mixed with a fixing agent molded around an inner concentric tube of reinforcing fixing agent molded around a core rod, and wherein the nose tip of the core penetrates into the unagitated soil beyond the end of the concentric reinforcing layers.