Abstract: A heat-shrinkable tube according to an aspect of the present disclosure includes a base layer that is tubular and that covers outer peripheries of a plurality of electric wires, and a plurality of ridges that are formed on an inner peripheral surface of the base layer and that extend in an axial direction of the base layer.

Abstract: A porous membrane laminate according to one aspect of the present disclosure has one or more porous membranes containing polytetrafluoroethylene as a main component, wherein the porous membrane laminate satisfies a following formula (1): P / ? > - 31.6 × ln ? Ra + 168 ( 1 ) wherein P is an average bubble point [kPa]; ? is a surface tension [dyn/cm] of a test liquid used in measurement of the average bubble point; and Ra is a surface roughness [nm] of the porous membrane, and 14 nm?Ra?96 nm.

Abstract: A porous membrane according to the present disclosure includes polytetrafluoroethylene as a main component, wherein a melting curve obtained in a first run of differential scanning calorimetry at a rate of temperature increase of 10° C./min has an endothermic peak in a range of 300° C. to 360° C., and a difference between an onset temperature and an endset temperature of the endothermic peak is 20° C. or less.

Abstract: The valve member according to one embodiment of the present disclosure is a resin formed product having a crosslinked ethylene-tetrafluoroethylene copolymer as a main component, and having a crosslinking density of 85.0 mol/m3 or more calculated from a storage modulus at 300° C.

Abstract: A heat shrinkable connection component according to one embodiment of the present disclosure is used for the purpose of connecting an insulated wire that is obtained by covering a conductor with an insulating layer. This heat shrinkable connection component is provided with a heat shrinkable tube that has a melting point of 210° C. to 250° C. and a pair of sealing parts that are arranged on the inner circumferential surfaces of both end parts of the heat shrinkable tube; and the sealing material of the sealing parts has a shear viscosity of 1,000 Pa·s to 2,000 Pa·s at a shear rate of 100/s at 250° C., and a shear viscosity of 7,000 Pa·s to 70,000 Pa·s at a shear rate of 0.01/s at 215° C.

Abstract: A hollow fiber membrane module according to an aspect of the present disclosure comprises: a hollow fiber membrane bundle that has a plurality of hollow fiber membranes aligned in one direction; a housing that accommodates the hollow fiber membrane bundle; and a potting portion provided around both ends or one end of the hollow fiber membrane bundle, in which space between an outer surface of the hollow fiber membranes and an inner surface of the housing is filled with a potting agent, wherein each of the hollow fiber membranes has a body portion, and an enlarged-diameter portion provided at both ends or one end of the body portion and having an inner diameter enlarged as compared to the body portion, and the enlarged-diameter portion is buried in the potting portion.

Abstract: A method for manufacturing a hollow fiber membrane module, the hollow fiber membrane module including: a hollow fiber membrane bundle including a plurality of hollow fiber membranes; a housing configured to contain the hollow fiber membrane bundle; and a potting part in which a potting agent is added between an outer surface of the hollow fiber membranes and an inner surface of the housing at both end regions or at one end region of the hollow fiber membrane bundle, wherein the method including: providing a sheet-shaped spacer in a space between the hollow fiber membranes at the both end regions or at the one end region of the hollow fiber membrane bundle; and adding a potting agent between the outer surface of the hollow fiber membranes and the inner surface of the housing at the both end regions or at the one end region of the hollow fiber membrane bundle such that the provided spacer is embedded, wherein the potting agent includes resin, rubber, or elastomer, as a main ingredient, and wherein the spacer is

Abstract: A hollow-fiber membrane module according to an embodiment of the present disclosure includes a rectangular tubular outer casing with at least one sidewall being open, the outer casing having a plurality of open ports, and an inner casing configured such that a plurality of hollow-fiber membranes aligned in a longitudinal direction of the outer casing are placeable in the inner casing and configured to be insertable into the one sidewall.

Abstract: An aeration module capable of aerating a liquid supplied to inner portions of hollow-fiber membranes includes a housing containing a fluororesin as a main component, and a plurality of the hollow-fiber membranes containing polytetrafluoroethylene or a modified polytetrafluoroethylene as a main component. A porosity K [%], an average thickness T1 [mm], and an average outer diameter D2 [mm] of the hollow-fiber membranes satisfy a relation of a formula of K/(T1×D2×100)?2.0.

Abstract: The heat shrinkable tube according to the present disclosure contains an ethylene-tetrafluoroethylene copolymer as a main component. The heat shrinkable tube has a melting point of 210° C. to 250° C. and a storage elastic modulus of 0.8 MPa to 2.8 MPa at 250° C. to 280° C.

Abstract: A hollow-fiber membrane according to an aspect of the present disclosure contains a polytetrafluoroethylene or a modified polytetrafluoroethylene as a main component and has an average outer diameter of 1 mm or less and an average inner diameter of 0.5 mm or less. In a measurement of a heat of fusion of the polytetrafluoroethylene or the modified polytetrafluoroethylene with a differential scanning calorimeter, when the polytetrafluoroethylene or modified polytetrafluoroethylene is subjected to a first step of heating from room temperature to 365° C., a second step of cooling from 365° C. to 350° C., maintaining the temperature, subsequently cooling from 350° C. to 330° C., and further cooling from 330° C. to 305° C., and a third step of cooling from 305° C. to 245° C. at a rate of ?50° C./min and subsequently heating from 245° C. to 365° C. at a rate of 10° C./min, a heat of fusion from 296° C. to 343° C. in the third step is 30.0 J/g or more and 45.0 J/g or less.

Abstract: A formed article according to one embodiment of the present disclosure includes a cylindrical base layer containing a polyimide as a main component, a sliding layer disposed on an inner circumferential surface side of the base layer and containing a polyether ether ketone as a main component, and an outermost layer disposed on an outer circumferential surface side of the base layer and containing a fluororesin as a main component.

Abstract: The optical element holder according to the present disclosure is an optical element holder for holding an optical element, wherein the optical element holder is formed from an optical element holder resin compound, the optical element holder resin compound contains a thermoplastic resin as a main component, a melting curve obtained by differential scanning calorimetry analysis of the optical element holder resin compound at a temperature increase rate of 10° C./min has two peaks in a range of not lower than 160° C. and not higher than 230° C. and a range of not lower than 260° C. and not higher than 320° C., and a ratio of a melting heat quantity in the range of not lower than 160° C. and not higher than 230° C. to a total melting heat quantity is not less than 20% and not greater than 80%.

Abstract: A method of making an oil repellent sheet material according to an embodiment of the present disclosures includes a step of applying to a porous sheet a composition for forming an oil repellent layer, the composition containing a solvent and an amorphous fluorine resin dispersed therein, and a step of swaging the porous sheet after the step of applying, wherein the porous sheet has a fibrous skeleton composed mainly of polytetrafluoroethylene, the method of making an oil repellent sheet material further comprising a heat treatment step of heating the porous sheet to which the composition for forming an oil repellent layer is applied, before or after the step of swaging.

Abstract: A hollow-fiber membrane module according to an embodiment of the present disclosure includes a rectangular tubular outer casing with at least one sidewall being open, the outer casing having a plurality of open ports, and an inner casing configured such that a plurality of hollow-fiber membranes aligned in a longitudinal direction of the outer casing are placeable in the inner casing and configured to be insertable into the one sidewall.

Abstract: A hollow-fiber membrane according to an aspect of the present disclosure contains a polytetrafluoroethylene or a modified polytetrafluoroethylene as a main component and has an average outer diameter of 1 mm or less and an average inner diameter of 0.5 mm or less. In a measurement of a heat of fusion of the polytetrafluoroethylene or the modified polytetrafluoroethylene with a differential scanning calorimeter, when the polytetrafluoroethylene or modified polytetrafluoroethylene is subjected to a first step of heating from room temperature to 365° C., a second step of cooling from 365° C. to 350° C., maintaining the temperature, subsequently cooling from 350° C. to 330° C., and further cooling from 330° C. to 305° C., and a third step of cooling from 305° C. to 245° C. at a rate of ?50° C./min and subsequently heating from 245° C. to 365° C. at a rate of 10° C./min, a heat of fusion from 296° C. to 343° C. in the third step is 30.0 J/g or more and 45.0 J/g or less.

Abstract: There is provided a hollow extrusion-molded material formed by drawdown molding of a resin composition, the resin composition including, as a base resin, an ethylene-ethyl acrylate copolymer, or an ethylene-ethyl acrylate copolymer and linear low-density polyethylene, the resin composition including a bromine-based flame retardant, antimony trioxide and magnesium hydroxide, wherein a composition ratio between the ethylene-ethyl acrylate copolymer and the linear low-density polyethylene, a content of the bromine-based flame retardant, a content of the antimony trioxide, and a content of the magnesium hydroxide are within specified ranges. There are also provided a crosslinked polymer of the hollow extrusion-molded material, and a heat-shrinkable tube and a multilayer heat-shrinkable tube obtained from the crosslinked polymer.

Abstract: A polytetrafluoroethylene formed product according to an aspect of the invention contains, as a principal component, a polytetrafluoroethylene having a crosslinked structure and has a PV limit of not less than 1600 MPa·m/min.

Abstract: A semipermeable membrane according to an embodiment of the present invention includes a semipermeable membrane layer containing an amorphous resin as a main component, and a sheet-like supporting body that supports the semipermeable membrane layer. The supporting body has a porous first supporting layer and a porous second supporting layer laminated on one of surfaces of the first supporting layer. The second supporting layer has a smaller mean flow pore diameter than the first supporting layer. The second supporting layer is impregnated with the semipermeable membrane layer. A ratio of the mean flow pore diameter of the second supporting layer to the mean flow pore diameter of the first supporting layer is preferably 1/1,000 or more and ? or less. The mean flow pore diameter of the first supporting layer is preferably 0.05 ?m or more and 20 ?m or less, and the mean flow pore diameter of the second supporting layer is preferably 0.01 ?m or more and 1 ?m or less.

Abstract: A method for producing a laminated complex according to one embodiment of the present invention is a method for producing a laminated complex that includes a sheet-shaped or tube-shaped porous support and a semipermeable membrane layer stacked on an outer surface of the support, the method including a coating step of coating an outer surface of the support with a semipermeable membrane layer-forming composition in which a fluororesin is dispersed in a solvent; an immersing step of immersing the coated surface of the support in water after the coating step; and a heating step of heating water in which the support is immersed.