Abstract: A core-sheath composite cross-section fiber, wherein the core section polymer is a thermoplastic polymer, the sheath-section polymer is a polyamide having a dicarboxylic acid unit having a sebacic acid unit as a main component, the boiling-water shrinkage ratio is 6.0-12.0%, and the stress per unit fineness during 3% elongation in a fiber tensile test is 0.60 cN/dtex or more. The core-sheath composite cross-section fiber has excellent moisture-absorbing capability and wrinkling prevention, and the moisture-absorbing capability is maintained even when washed.

Abstract: The present invention provides a separation membrane and a separation membrane element capable of exhibiting a good water production performance even at a high temperature and also excellent handleability and quality. The separation membrane of the present invention includes a separation membrane main body having a feed-side face and a permeate-side face; and a permeate-side channel member fixed onto the permeate-side face of the separation membrane main body, and the permeate-side channel member includes polypropylene as a main component and satisfies the following requirements (a) to (c): (a) a softening point temperature is 60° C. or higher; (b) a tensile elongation in a standard state is 10% or more; and (c) a yield point stress under a wet condition at 50° C. is 2 MPa or more.

Abstract: A moisture-absorbing core-sheath composite yarn has a sheath polymer made of a polyamide, a core polymer is a polyetheresteramide copolymer, and the strength retention after a 150° C. 1-hour dry heat treatment is 50% or higher. The core-sheath composite yarn has high moisture-absorbing performance, is more comfortable than natural fibers, and can retain the soft texture, durability, and moisture-absorbing/releasing performance even when laundered and dried repeatedly.

Abstract: An object of the present invention is to provide a separation membrane having high permeability and selective removability of divalent/monovalent ions. The separation membrane of the present invention includes a supporting membrane and a separation functional layer formed on the supporting membrane, in which the separation functional layer contains a polymerized product of a polyfunctional amine with a polyfunctional acid halide, the polyfunctional amine contains a polyfunctional aliphatic amine as a main component, the separation functional layer has a hollow protuberant structure, and the separation functional layer has a relative surface area of 1.1-10.0.

Abstract: A battery is provided. The battery including a positive electrode that includes a positive electrode current collector and a positive electrode active material layer provided on the positive electrode current collector; a negative electrode; and a separator that includes at least a porous film; wherein the porous film satisfies the following equations: 0.04?Ri??0.07L?0.09×S+4.99 Ri=?2L/?? ??=[{(L?/100)?Rz×0.46/3}/L]×100 ?={(1.216×?Td×10?4)/L}0.5 where Ri represents a film resistance (?m), L represents a film thickness (?m), ? represents a tortuosity factor, T represents air permeability (sec/100 cc), d represents a pore size (nm), Rz represents a surface roughness maximum height (?m), ? represents a porosity (%), ?? represents a corrected porosity (%), and S represents an area density of the positive electrode active material layer (mg/cm2).

Abstract: A hygroscopic core-sheath composite fiber includes: a polyetheresteramide copolymer as a core polymer; and a polyamide as a sheath polymer, and has a degree of shrinkage with boiling water of 6-11%. The core-sheath composite fiber has high hygroscopicity and laundering durability of the hygroscopicity which makes the fiber withstand practical use, and is capable of attaining a soft feeling.

Abstract: A moisture absorbent core sheath composite yarn has a sheath portion polymer that is a polyamide and a core portion that is a thermoplastic polymer, and has a moisture absorbance/desorbance (?MR) of 5.0%, wherein the ?MR maintenance rate after 20 washes is 90%-100%. The core sheath composite fiber has high moisture absorbance, is more comfortable than natural fibers, and has wash resistance with moisture absorbance that stands up to real use and color fastness.

Abstract: A separation membrane element of the present invention includes: a water collection tube; and a plurality of separation membrane leaves stacked on each other and wound around the water collection tube, each of the separation membrane leaves includes one or more separation membranes each having a feed-side face and a permeate-side face and is configured so that the feed-side faces face each other, and a sheet having a plurality of projections fixed thereto is provided between the permeate-side faces of the separation membrane leaves stacked on each other. Regarding a height of the projections, a ratio of the maximum height to the minimum height is from 1.10 to 1.50, and a variation coefficient of the height is from 0.02 to 0.15, and an impregnation ratio of the projections into the sheet is from 10% to 100%.

Abstract: A polyamide multifilament has a total fineness of 4.0-6.0 dtex, a single yarn fineness of 1.2 dtex or below, a strength-elongation product of 9.1 or above, and an elongation degree of 40-50%. A polyamide fiber has a small total fineness and single fiber fineness while having a high strength-elongation product and exhibiting a low unevenness (U%) in the longitudinal direction. Stockings exhibit an excellent higher-order process passability and productivity and exhibit an excellent softness, durability, and transparent feel and a fabric exhibits an excellent softness and durability.

Abstract: The present invention provides a separation membrane and a separation membrane element which are capable of exhibiting good water production performance and excellent in handleability and process passage. A separation membrane of the present invention is a separation membrane including: a separation membrane main body having a feed-side face and a permeate-side face; and a permeate-side channel member adhered to the permeate-side face of the separation membrane main body, in which the permeate-side channel member includes a composition containing at least a high-crystalline polypropylene (A) and satisfies the following requirements (a) and (b): (a) a content of the high-crystalline polypropylene (A) in the composition is from 40 to 95% by weight; and (b) the permeate-side channel member has a melting endothermic energy amount (?H) of from 20 to 70 J/g.

Abstract: A battery is provided. The battery including a positive electrode that includes a positive electrode current collector and a positive electrode active material layer provided on the positive electrode current collector; a negative electrode; and a separator that includes at least a porous film; wherein the porous film satisfies the following equations: 0.04?Ri??0.07L?0.09×S+4.99 Ri=?2L/?? ??=[{(L?/100)?Rz×0.46/3}/L]×100 ?={(1.216×?Td×10?4)/L}0.5 where Ri represents a film resistance (?m), L represents a film thickness (?m), ? represents a tortuosity factor, T represents air permeability (sec/100 cc), d represents a pore size (nm), Rz represents a surface roughness maximum height (?m), ? represents a porosity (%), ?? represents a corrected porosity (%), and S represents an area density of the positive electrode active material layer (mg/cm2).

Abstract: A separation membrane element includes a water collecting pipe, a separation membrane main body having a feed-side face and a permeate-side face, a feed-side channel material and permeate-side channel materials. The separation membrane main body, the feed-side channel material and the permeate-side channel materials are spirally wound around the water collecting tube. A plurality of the permeate-side channel materials are discontinuously provided on the permeate-side face of the separation membrane main body, along a first direction that is a longitudinal direction of the water collecting pipe. The feed-side channel material has a thickness of from 0.15 to 0.5 mm.

Abstract: Provided is a battery in which an area density S (mg/cm2) of a positive electrode active material layer is 27 mg/cm2 or greater, and a porous film included in a separator has a structure satisfying the following Expressions. 0.04?Ri??0.07L?0.09×S+4.99 Ri=?2L/?? ??=[{(L×?/100)?Rz×0.46/3}/L]×100 ?={(1.216×??Td×10?4)/L}0.

Abstract: A separation membrane includes a separation membrane main body having at least a substrate and a separation function layer; and a channel material having a composition different from that of the separation membrane main body and affixed to a substrate-side surface of the separation membrane main body, wherein the channel material is discontinuous in a first direction and continuous in a second direction from one end to another end of the separation membrane main body.

Abstract: A spiral separation membrane element includes a water collection tube; a separation membrane wound around the water collection tube, having a feed-side surface and a permeate-side surface, and including a band-shaped region on at least one end of the feed-side surface in an axial direction of the water collection tube; and a channel material fused to the band-shaped region.

Abstract: The present invention provides a separation membrane and a separation membrane element capable of exhibiting a good water production performance even at a high temperature and also excellent handleability and quality. The separation membrane of the present invention includes a separation membrane main body having a feed-side face and a permeate-side face; and a permeate-side channel member fixed onto the permeate-side face of the separation membrane main body, and the permeate-side channel member includes polypropylene as a main component and satisfies the following requirements (a) to (c): (a) a softening point temperature is 60° C. or higher; (b) a tensile elongation in a standard state is 10% or more; and (c) a yield point stress under a wet condition at 50° C. is 2 MPa or more.

Abstract: A separation membrane for water treatment, comprising a porous layer that is obtained by a phase separation method using a solution containing a resin and at least one of either an N,N-disubstituted isobutylamide or an N-monosubstituted isobutylamide.

Abstract: Provided is a semipermeable membrane having at least a separating functional layer, wherein azo compounds are retained in the separating functional layer, and the separating functional layer has a yellow index of 10 to 40. Also provided is a method of producing the semipermeable membrane. The present invention provides a semipermeable membrane having not only high water permeability but also high rejection performance even for substances that are nondissociative in the neutral range, such as boric acid, and showing high durability and a manufacturing method therefor.

Abstract: A separation membrane element of the present invention includes: a water collection tube; and a plurality of separation membrane leaves stacked on each other and wound around the water collection tube, each of the separation membrane leaves includes one or more separation membranes each having a feed-side face and a permeate-side face and is configured so that the feed-side faces face each other, and a sheet having a plurality of projections fixed thereto is provided between the permeate-side faces of the separation membrane leaves stacked on each other. Regarding a height of the projections, a ratio of the maximum height to the minimum height is from 1.10 to 1.50, and a variation coefficient of the height is from 0.02 to 0.15, and an impregnation ratio of the projections into the sheet is from 10% to 100%.

Abstract: The present invention provides a separation membrane and a separation membrane element which are capable of exhibiting good water production performance and excellent in handleability and process passage. A separation membrane of the present invention is a separation membrane including: a separation membrane main body having a feed-side face and a permeate-side face; and a permeate-side channel member adhered to the permeate-side face of the separation membrane main body, in which the permeate-side channel member includes a composition containing at least a high-crystalline polypropylene (A) and satisfies the following requirements (a) and (b): (a) a content of the high-crystalline polypropylene (A) in the composition is from 40 to 95% by weight; and (b) the permeate-side channel member has a melting endothermic energy amount (?H) of from 20 to 70 J/g.