Abstract: A composition containing polytetrafluoroethylene and substantially free from a compound represented by Formula (3): (H—(CF2)8—SO3)qM2 wherein M2 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and q is 1 or 2. Also disclosed is a molded boy including the composition.

Abstract: The present invention provides a resin composition having superior flexibility and that exhibits excellent durability in thermal molding, and a molded body of such a resin composition. The present invention relates to a resin composition comprising: a copolymer (B) constituted of a vinyl alcohol polymer (B-1) region and a diene polymer (B-2) region; and at least one compound selected from the group consisting of a phenol-based compound (C), an amine-based compound (D), and a phosphorus-based compound (E).

Abstract: Provided is an elevator rope terminal structure including an insertion body to be held in contact with an elevator rope having a flat sectional shape. Pressing portions provided to the insertion body are configured to maintain a state in which the insertion body is pressed against the elevator rope. The elevator rope and the insertion body are to be held inside a through hole of a housing. The through hole has an inner surface including a first receiving surface and a second receiving surface which are to be positioned on both sides of the elevator rope in a thickness direction of the elevator rope. A distance between the first receiving surface and the second receiving surface decreases toward a rope passage port of the through hole. The insertion body includes a first insertion member to be arranged between the elevator rope and the first receiving surface.

Abstract: An optical fiber unit includes: an optical fiber bundle formed by bundling a plurality of optical fibers; and a plurality of bundling members. One bundling member of the plurality of bundling members is wound on an outer circumference of the optical fiber bundle in a length direction of the optical fiber bundle, while reversing a winding direction alternately, and is joined to another bundling member at a section where the winding direction is reversed. A ratio of a width of a cross-section of the bundling member to a thickness of the cross-section of the bundling member is smaller than 20.

Abstract: A method for producing an optical fiber unit by winding at least two bundling members on the outer circumference of an optical fiber bundle formed by bundling a plurality of optical fibers, including: feeding the optical fiber bundle from a fiber passage member; feeding the bundling members while forming intersection points between two of the bundling members on the outer circumference of the optical fiber bundle by feeding at least one of the bundling members from a bundling member passage part of a rotating member arranged to the outer circumference of the fiber passage member, while causing the rotating member to oscillate, with the feeding direction serving as the axis; and fusion-bonding the bundling members at their intersection points.

Abstract: [Object] In an optical fiber cable including a plurality of optical fiber units each formed by tying optical fibers in a bundle, preferable water resistance is to be achieved without increasing an outer diameter of the optical fiber cable. [Solution] An optical fiber cable includes: a plurality of optical fiber units each including a plurality of optical fibers and a bundling member wound around an outer periphery of a bundle of the plurality of optical fibers, the bundling member having a surface to which a water-absorbent granular substance is detachably attached.

Abstract: An optical fiber cable is provided. The cable includes: an optical fiber core having a central axis; a presser winding covering the optical fiber core; a sheath covering the presser winding; two tension members in the sheath and facing each other with the central axis therebetween; and two rip cords facing each other with the central axis therebetween and being in direct contact with the sheath and the presser winding. The optical fiber core includes a plurality of optical fiber tapes arranged around the central axis and having mutually different stripe ring marks applied thereon. Each optical fiber tapes includes a plurality of optical fibers intermittently adhered to each other.

Abstract: An optical fiber unit includes: an optical fiber bundle formed by bundling a plurality of optical fibers; and a plurality of bundling members. One bundling member of the plurality of bundling members is wound on an outer circumference of the optical fiber bundle in a length direction of the optical fiber bundle, while reversing a winding direction alternately, and is joined to another bundling member at a section where the winding direction is reversed. A ratio of a width of a cross-section of the bundling member to a thickness of the cross-section of the bundling member is smaller than 20.

Abstract: A former including: a guide pipe guiding an optical fiber bundle; a tape forming section forming a press-wrapping tape from a strip shape into a helical shape, while guiding the press-wrapping tape along a feed direction, the tape forming section including a curved section gradually curving the strip shaped press-wrapping tape while guiding the press-wrapping tape along the feed direction, and a helical section that is a helical tube shaped location further to a downstream side than a position where two edges of the curved section intersect with each other, the helical section causing two end portions of the press-wrapping tape that has been curved with the curved section to overlap and forming the press-wrapping tape into a helical shape, while guiding the press-wrapping tape along the feed direction, and gradually narrowing an external diameter of the helical shaped press-wrapping tape.

Abstract: An optical fiber cable includes a core including a plurality of units which are assembled and each of which comprises a plurality of optical fibers which are assembled, a pair of tension members disposed so as to face each other with the core interposed therebetween, and a sheath covering the core and the pair of tension members collectively. The units are twisted so as to form a plurality of layers. The plurality of layers includes a first layer having first-layer units formed in an SZ-twisted shape and a second layer having second-layer units formed in an SZ-twisted shape. A twisting direction of the first-layer units is opposite to a twisting direction of the second-layer units in at least a portion in a cable length direction.

Abstract: To make a tape length that can be supplied at one time long, and to make it possible to directly supply a tape from a record wound tape. A tape supplying method of this invention includes: connecting a tape end to an outer side of one record wound tape of a first record wound tape and a second record wound tape and a tape end to an inner side of another record wound tape, by matching a surface and a rear surface of the tapes; and after the connecting, supplying a tape of the first record wound tape and the second record wound tape from a tape end of the first record wound tape to an opposite side of a side that has been connected to the second record wound tape.

Abstract: [Objective] To detect abnormalities in optical fibers by using a phenomenon specific to optical fiber tapes including plural optical fibers arranged parallel to each other and connected together intermittently. [Solution] This optical fiber tape manufacturing method involves: a step of forming connecting parts that connect together adjacent optical fibers among a plurality of optical fibers arranged parallel to each other while applying tension to the optical fibers, and thus forming an optical fiber tape in which the connecting parts are intermittently disposed; a step of reducing the tension applied to the optical fiber tape; and a step of measuring a thickness of the optical fiber tape with reduced tension from a direction parallel to a tape plane on a path of the optical fiber tape.

Abstract: [Problem] The thickness on a ripcord in a circular optical cable is reduced, to improve workability. [Solution] An optical cable of the present invention includes: an optical fiber unit including optical fibers; a sheath, having a circular external form, configured to house the optical fiber unit in a housing portion; and two strength members embedded in the sheath; and two rip cords, wherein when a direction of connecting the two strength members sandwiching the housing portion is a first direction and a direction intersecting the first direction is a second direction, in a cross section of the optical cable, a cross-sectional shape of the housing portion has a dimension in the second direction greater than that in the first direction, and the two rip cords is disposed to sandwich the optical fiber unit such that a direction of connecting the two rip cords is in the second direction, in the cross section of the optical cable.

Abstract: An optical fiber unit includes: an optical fiber bundle formed by bundling a plurality of optical fibers; and a plurality of bundling members. Each of the bundling members is wound on an outer circumference of the optical fiber bundle along a length direction of the optical fiber bundle while a winding direction of the bundling member is reversed alternately, and joined with another bundling member at reverse sections where the winding direction of the bundling member is reversed. A region surrounded by a pair of the bundling members to be joined at the reverse sections includes a joining point at one of the reverse sections of another pair of the bundling members.

Abstract: An optical fiber unit includes: an optical fiber bundle formed by bundling a plurality of optical fibers; and a plurality of bundling members. Each of the bundling members is wound on an outer circumference of the optical fiber bundle along a length direction of the optical fiber bundle while a winding direction of the bundling member is reversed alternately, and joined with another bundling member at reverse sections where the winding direction of the bundling member is reversed. A region surrounded by a pair of the bundling members to be joined at the reverse sections includes a joining point at one of the reverse sections of another pair of the bundling members.

Abstract: An optical fiber cable is provided. The cable includes: an optical fiber core having a central axis; a presser winding covering the optical fiber core; a sheath covering the presser winding; two tension members in the sheath and facing each other with the central axis therebetween; and two rip cords facing each other with the central axis therebetween and being in direct contact with the sheath and the presser winding. The optical fiber core includes a plurality of optical fiber tapes arranged around the central axis and having mutually different stripe ring marks applied thereon. Each optical fiber tapes includes a plurality of optical fibers intermittently adhered to each other.

Abstract: An optical fiber cable is provided. The cable includes: an optical fiber core having a central axis; a presser winding covering the optical fiber core; a sheath covering the presser winding; two tension members in the sheath and facing each other with the central axis therebetween; and two rip cords facing each other with the central axis therebetween and being in direct contact with the sheath and the presser winding. The optical fiber core includes a plurality of optical fiber tapes arranged around the central axis and having mutually different stripe ring marks applied thereon. Each optical fiber tapes includes a plurality of optical fibers intermittently adhered to each other.

Abstract: An optical fiber cable includes a core including a plurality of units which are assembled and each of which comprises a plurality of optical fibers which are assembled, a pair of tension members disposed so as to face each other with the core interposed therebetween, and a sheath covering the core and the pair of tension members collectively. The units are twisted so as to form a plurality of layers. The plurality of layers includes a first layer having first-layer units formed in an SZ-twisted shape and a second layer having second-layer units formed in an SZ-twisted shape. A twisting direction of the first-layer units is opposite to a twisting direction of the second-layer units in at least a portion in a cable length direction.

Abstract: [Problem] The thickness on a ripcord in a circular optical cable is reduced, to improve workability. [Solution] An optical cable of the present invention includes: an optical fiber unit including optical fibers; a sheath, having a circular external form, configured to house the optical fiber unit in a housing portion; and two strength members embedded in the sheath; and two rip cords, wherein when a direction of connecting the two strength members sandwiching the housing portion is a first direction and a direction intersecting the first direction is a second direction, in a cross section of the optical cable, a cross-sectional shape of the housing portion has a dimension in the second direction greater than that in the first direction, and the two rip cords is disposed to sandwich the optical fiber unit such that a direction of connecting the two rip cords is in the second direction, in the cross section of the optical cable.

Abstract: An optical fiber cable is provided. The cable includes: an optical fiber core having a central axis; a presser winding covering the optical fiber core; a sheath covering the presser winding; two tension members in the sheath and facing each other with the central axis therebetween; and two rip cords facing each other with the central axis therebetween and being in direct contact with the sheath and the presser winding. The optical fiber core includes a plurality of optical fiber tapes arranged around the central axis and having mutually different stripe ring marks applied thereon. Each optical fiber tapes includes a plurality of optical fibers intermittently adhered to each other.