Provided is a spiral membrane element that has a restricted outer diameter and is capable of being decreased in operation energy therefor. The element is a spiral membrane element including plural membrane leaves in each of which a permeation-side flow-channel member is interposed between opposed separation membranes a supply-side flow-channel member interposed between any two of the membrane leaves a perforated central pipe on which the membrane leaves and the supply-side flow-channel member are wound and a sealing part that prevents a supply-side flow-channel member from being mixed with a permeation-side flow-channel member. This element has an efficiency index E of 0.005 to 0.10, and the thickness of the supply-side flow-channel member is from 10 to 110 mil.

Provided is a spiral membrane element that has a restricted outer diameter and is capable of being decreased in operation energy therefor. The element is a spiral membrane element including plural membrane leaves in each of which a permeation-side flow-channel member is interposed between opposed separation membranes a supply-side flow-channel member interposed between any two of the membrane leaves a perforated central pipe on which the membrane leaves and the supply-side flow-channel member are wound and a sealing part that prevents a supply-side flow-channel member from being mixed with a permeation-side flow-channel member. This element has an efficiency index E of 0.005 to 0.10, and the thickness of the supply-side flow-channel member is from 10 to 110 mil.

The invention provides a layered product in which a glass cloth and a fluororesin-containing sheet are firmly bonded to each other even without providing a layer of polytetrafluoroethylene fine particles and without recrystallizing the fluororesin. The layered product includes, in a layered structure, a fluororesin-containing sheet, a hot-melt resin layer, and a glass cloth. The glass cloth is a fabric including a bulked glass yarn.

A heat-activated crimping textile is disclosed including a plurality of a first yarn, a plurality of a second yarn interlaced with the plurality of the first yarn, and a plurality of a third yarn interlaced with the plurality of the first yarn, the plurality of the second yarn, or both. The third yarn includes a heat-activated shrinkage factor of greater than 30% when exposed to a predetermined temperature. When the heat-activated crimping textile is exposed to an elevated temperature of at least the predetermined temperature, a plurality of crimps propagates along the heat-activated crimping textile, forming a crimped textile.

A knitted fastener stringer of the invention includes: a fastener tape; and a continuous element row which is fixed upon knitting the fastener tape, the fastener tape has a tape main body portion and an element attachment portion, the tape main body portion has a first region which neighbors the element attachment portion, a second region which neighbors the first region, and a third region which neighbors the second region and forms an outermost side edge portion, the second region is formed thinner than the first region, and the third region is formed thinner than the second region.

The invention relates to a protective sheath designed, in particular but not exclusively, for an aircraft. The conduit is flexible and can have a small radius of curvature able to be obtained without torsion and allowing access, over the majority or entirety of its length, to the electrical wire or cable inside. The protective sheath (1) comprises a flexible body generally having a cylindrical shape, the flexible body being slit along at least a certain length and along a longitudinal axis, characterised in that the body has an open-work wall and in that the sheath is capable of being deformed along its length in order to be compressed/compacted on itself.

The invention relates to a protective sheath designed, in particular but not exclusively, for an aircraft. The conduit is flexible and can have a small radius of curvature able to be obtained without torsion and allowing access, over the majority or entirety of its length, to the electrical wire or cable inside. The protective sheath (1) comprises a flexible body generally having a cylindrical shape, the flexible body being slit along at least a certain length and along a longitudinal axis, characterised in that the body has an open-work wall and in that the sheath is capable of being deformed along its length in order to be compressed/compacted on itself.

Provided is a configuration capable of improving the signal strength of a piezoelectric element using piezoelectric fibers. This braided piezoelectric element comprises a core comprising conductive fibers and a sheath comprising braided piezoelectric fibers so as to cover the core, the braided piezoelectric element further comprising a metal terminal connected and fixed to the core in either of the following states A or B. A) A state where a portion of the metal terminal grasps a fiber portion constituting the end of a braided piezoelectric element and the core and the metal terminal are electrically connected to each other and fixed within 1 mm from where the metal terminal grasps the fiber portion. B) A state where: a portion of the metal terminal has a fork or needle shape; the fork-shaped or needle-shaped portion is electrically connected to the core while in contact with the sheath; and the braided piezoelectric element is secured to the metal terminal by another portion of the metal terminal or a component fixed to the metal terminal within 10 mm from the point of the electrical connection.

Provided is a configuration capable of improving the signal strength of a piezoelectric element using piezoelectric fibers. This braided piezoelectric element comprises a core comprising conductive fibers and a sheath comprising braided piezoelectric fibers so as to cover the core, the braided piezoelectric element further comprising a metal terminal connected and fixed to the core in either of the following states A or B. A) A state where a portion of the metal terminal grasps a fiber portion constituting the end of a braided piezoelectric element and the core and the metal terminal are electrically connected to each other and fixed within 1 mm from where the metal terminal grasps the fiber portion. B) A state where: a portion of the metal terminal has a fork or needle shape; the fork-shaped or needle-shaped portion is electrically connected to the core while in contact with the sheath; and the braided piezoelectric element is secured to the metal terminal by another portion of the metal terminal or a component fixed to the metal terminal within 10 mm from the point of the electrical connection.

A spiral membrane element is provided which has a restricted outer diameter but is heightened in effective membrane area, and further which can be decreased in operation energy therefor. The spiral membrane element is an element including plural membrane leaves L in each of which a permeation-side flow-channel member 3 is interposed between opposed separation membranes 1; a supply-side flow-channel member 2 interposed between any two of the membrane leaves L; a perforated central pipe 5 on which the membrane leaves L and the supply-side flow-channel member 2 are wound; and sealing parts that prevent a supply-side flow-channel from being mixed with a permeation-side flow-channel. The sealing parts include both-end sealing parts 11 in which an adhesive is used to seal two-side end parts of each of the membrane leaves L on both sides of the leaf in an axial direction A1 of the leaf. The thickness T1 of the both-end sealing parts 11 is 390 to 540 μm.