Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
  • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
  • D04H1/4326—Condensation or reaction polymers
  • D04H1/4358—Polyurethanes
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
  • D02G1/18—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by combining fibres, filaments, or yarns, having different shrinkage characteristics
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
  • D04H1/4282—Addition polymers
  • D04H1/4291—Olefin series
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
  • D04H1/4326—Condensation or reaction polymers
  • D04H1/4334—Polyamides
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
  • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
  • D04H1/43835—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
  • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
  • D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
  • D04H1/50—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by treatment to produce shrinking, swelling, crimping or curling of fibres
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
  • Y10T442/601—Nonwoven fabric has an elastic quality
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
  • Y10T442/601—Nonwoven fabric has an elastic quality
  • Y10T442/602—Nonwoven fabric comprises an elastic strand or fiber material
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
  • Y10T442/608—Including strand or fiber material which is of specific structural definition
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
  • Y10T442/608—Including strand or fiber material which is of specific structural definition
  • Y10T442/609—Cross-sectional configuration of strand or fiber material is specified
  • Y10T442/61—Cross-sectional configuration varies longitudinally along strand or fiber material
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
  • Y10T442/637—Including strand or fiber material which is a monofilament composed of two or more polymeric materials in physically distinct relationship [e.g., sheath-core, side-by-side, islands-in-sea, fibrils-in-matrix, etc.] or composed of physical blend of chemically different polymeric materials or a physical blend of a polymeric material and a filler material

Definitions

• the present invention relates to a nonwoven fabric which is elastically extensible and slides on the skin, and a method for producing the same.
• the elastically extensible web described in Japanese Patent Application Laid-Open No. 06-184897 discloses a fiber layer made of an elastically extensible polymer and a fiber made of an inelastically extensible polymer. It is formed by superimposing the layers.
• the elastically extensible nonwoven fabric described in Japanese Patent Publication No. H09-95-12311 also comprises a fiber layer made of an elastically extensible polymer and a non-elastically extensible polymer. It is made up of layers of fibers. .
• the elastically extensible composite yarn described in Japanese Patent Application Laid-Open No. H04-111102 is made of a core-sheath type composite fiber, and the core fiber is made of elastically extensible urethane.
• the sheath fiber is made of polyamide which is inelastic and extensible.
• the stretchable fabric described in Japanese Patent Application Laid-Open No. 09-311648 has a core made of an elastomer and a sheath made of a non-elastomer, and the core and the sheath are separated by stretching. Filaments are used for the weft thread, which has become loose and form bellows-like wrinkles.
• Patent No. 3,262,803 discloses melt-spun multicomponent thermoplastic continuous filaments, products formed therefrom, and the like. The invention according to a forming method for the same is described. According to the present invention, the splittable multi-component thermoplastic filament extruded from the extruder and passed through the quenching chamber enters the Lurgi tube. Compressed air is fed into the Lurgi tube, where the filaments are stretched and separated. Thereafter, the separated filaments are collected on a collecting surface made of a porous screen or the like to form a nonwoven fabric.
• Japanese Patent Application Laid-Open No. 09-291454 discloses an invention relating to a stretchable nonwoven fabric.
• the elastic elastic nonwoven fabric is made by using an elastic elastic composite fiber having a hard elastomer component composed of crystalline polypropylene as a first component and a thermoplastic elastomer as a second component. It is formed.
• a side-by-side type ⁇ sheath ⁇ ⁇ and core type thing or the like is used for this conjugate fiber.
• the conjugate fiber is processed into a nonwoven fabric by a spunbond method, a thermal bond method, or the like. Disclosure of the invention
• the nonwoven fabric is a layer of fibers made of an elastically extensible polymer. Form the surface of the nonwoven fabric. Fibers of this type of polymer generally have a high coefficient of friction, so nonwoven fabrics whose fiber layer forms the surface have poor slippage when touched by the skin. In addition, the thickness of a nonwoven fabric obtained by laminating two fiber layers tends to be large.
• the composite yarn / fabric described in JP-A-041-111021 and JP-A-09-3161648 public information uses a core-sheath type composite fiber, and is used as a core fiber.
• Elastomat® non-ellar fibers
• the elastomer which is an elastically extensible polymer, does not directly touch the skin.
• Such a composite yarn / fabric has good slippage when touching the skin.
• the sheath fibers having bellows-like wrinkles hinder the elastic contraction of the core fibers and reduce the amount of elastic extension and contraction of the composite yarn or fabric.
• the composite fiber has a large diameter due to having a bellows-shaped sheath, it is difficult to obtain a soft touch unique to the fiber having a small fineness in these composite yarn / fabric.
• a splittable multi-component thermoplastic filament is split into a plurality of narrow filaments in a Lurgi tube. Later, a nonwoven fabric is formed. On the surface of the nonwoven fabric, each component in the multi-component thermoplastic filament forms a thin filament according to the proportion of the component. If one of the multi-components is a thermoplastic elastomer, the filaments are applied to the surface of the nonwoven fabric according to the proportion of the thermoplastic elastomer filaments in the multi-component. Appearing, non-woven fabrics can become slippery to the skin due to their elastomeric properties.
• Japanese Patent Application Laid-Open No. 09-291454 discloses a stretch elastic composite fiber having a hard elastic component made of polypropylene as a first component, a thermoplastic elastomer as a second component, and
• the stretchable elastic nonwoven fabric obtained by fusing between the entanglement points of the composite fiber consists of a part where the surface of the composite fiber is occupied by polypropylene and a part where the surface of the composite fiber is occupied by elastomer. Therefore, compared to the case where the entire surface is occupied by the elastomer, the slippage on the skin is suppressed. However, if the elastomer is on the surface of the composite fiber, it will also be on the surface of the elastic nonwoven fabric.
• the non-woven fabric slips on the skin poorly.
• the sheath-and-core type in which the first component polypropylene is used as a sheath and an elastomer made of an ethylene-monoolefin copolymer is used as a core is described.
• composite fibers are disclosed, the elastic extensibility of such composite fibers is dominated by the extensibility of the hard elastic component made of polypropylene, which is the inherent extensibility of Elastoma. May be suppressed.
• An object of the present invention is to provide a nonwoven fabric capable of increasing the amount of elastic elongation and shrinkage and adjusting slipperiness on the skin, and a method for producing the same. .
• the present invention for solving the above-mentioned problems includes a first invention relating to a nonwoven fabric and a second invention relating to a method for producing the nonwoven fabric.
• the first invention is directed to an elastically extensible first fiber formed of a first polymer and an inelastically extensible second fiber of a second polymer. It is a non-woven fabric that can be stretched.
• the nonwoven fabric has a first surface and a second surface parallel to each other in the thickness direction.
• the second fiber is bonded to the first fiber at each of the intermittently formed bonding sites on the first fiber, and is bonded to the adjacent bonding site on the first fiber. It is in a state separated from the first fiber between the first fiber and the portion.
• the length of the second fiber in the separated state is longer than the length of the first fiber, and the number of the fibers is 1 to 16 with respect to the first fiber. It is formed with.
• the first invention has the following preferred embodiments.
• the first fiber is The first and second fibers intersect so that the second fibers are located on the inner side in the thickness direction and the second fibers are located on the outer side in the thickness direction.
• the chance of contact between the first fiber having a rubbery touch and the skin of the wearer of the article is generally small. Become.
• a first curved portion protruding from the radial center of the first fiber toward the outside of the first fiber, and from the outside toward the center.
• the second curved surface portion which is convex is alternately repeated in the circumferential direction of the first fiber, and the first curved surface portions adjacent to each other in the circumferential direction and the first curved surface portions are connected to each other.
• the second curved surface portion located therebetween cooperates to form a groove extending in the longitudinal direction of the first fiber, and the second curved surface portion forms a bottom of the groove.
• the first fiber when the first fiber is used for the wearing article, only the first curved surface portion of the first fiber comes into contact with the skin of the article wearer, so that the first fiber and the skin Opportunities for contact are reduced.
• the slip angle of either the first or second surface is in the range of 25 ° to 40 °.
• the nonwoven fabric having such a sliding angle is suitable for use in wearable articles and the like.
• the first polymer is either a thermoplastic polyurethane or a thermoplastic polyurethane containing a lubricant
• the second polymer is a polyolefin-based polymer or a polyamide-based polymer. It is one of the polymers. These polyolefin-based polymers and polyamide-based polymers are suitable for obtaining inelastically extensible second fibers.
• the second invention is directed to an elastically extensible first fiber made of a first polymer, and an inelastically made fiber made of a second polymer. This is a method for producing an elastically extensible nonwoven fabric formed by the extensible second fibers.
• the features of the second invention are as follows.
• a fibrous second fiber component formed by the second polymer and extending in parallel with the first fiber component is separably joined to a surface of the fibrous first fiber component formed by the first polymer.
• a web made of the conjugate fibers having a basis weight of 10 to 500 g / m 2 is formed.
• a plurality of portions where the composite fibers are inseparably joined to each other are intermittently formed in at least one of the machine direction and a cross direction to the machine direction.
• the web is stretched in at least the one direction within an elastic deformation range of the first fiber component and at an elongation equal to or less than a breaking elongation of the second fiber, and The first fiber component and the second fiber component are separated from each other, and the second fiber component is permanently deformed. Further thereafter, the web is contracted by the elastic restoring force of the first fiber component, and the first fiber component is the first fiber, the second fiber component is the second fiber, and the web is the web. Obtain a non-woven fabric.
• the second invention has the following preferred embodiments.
• the second fiber component is formed in a ratio of 1 to 16 fibers per one first fiber component.
• the first polymer is either a thermoplastic polyurethane or a lubricant-containing thermoplastic polyurethane
• the second polymer is a polyolefin-based polymer or a polyamide-based polymer.
• the slip angle of the nonwoven fabric is measured using the apparatus shown in FIG. Details of the measurement method are included in the description of FIG. 11 described later.
• the nonwoven fabric according to the present invention has elastic fibers, at least one inelastic fiber having a length longer than that of the elastic fibers is arranged near one elastic fiber. It is possible to adjust the smoothness to the skin so that it is close to that of the inelastic fiber.
• the nonwoven fabric according to the present invention when a plurality of inelastic fibers are arranged near one elastic fiber and the one elastic fiber is surrounded by these inelastic fibers, the nonwoven fabric slips on the skin. Especially good. Inelastic fibers, which have a length longer than the length of the elastic fiber between the parts to be joined to the elastic fiber, may hinder elastic expansion of the elastic fiber and the nonwoven fabric. Absent.
• Figure 1 is a perspective view of a nonwoven fabric.
• Figure 2 is a photograph showing a cross section of the composite fiber.
• Fig. 3 shows a trace of the composite fiber of Fig. 2.
• Fig. 4 is a partially enlarged view of Fig. 1.
• FIG. 5 is a diagram showing a section taken along line V_V of FIG.
• FIG. 6 is a partially enlarged view of FIG.
• Figure 7 is a view similar to Figure 5 when the nonwoven is stretched.
• FIG. 8 is a photograph similar to FIG. 2 showing an example of the embodiment.
• FIG. 9 is a view similar to FIG. 3, illustrating an example of the embodiment.
• FIG. 10 is a diagram showing a composite fiber having a different cross-sectional shape depending on (a), (b), and (c).
• Figure 11 is a side view of Tess Yuichi. BEST MODE FOR CARRYING OUT THE INVENTION
• the fragment of the approximately hexahedral nonwoven fabric 1 shown in perspective in Fig. 1 is It has an upper surface 2 and a lower surface 3 that are parallel to each other, and a side surface is formed by cut surfaces 4a, 4b, 4c, and 4d that intersect with both surfaces 2,3.
• the nonwoven fabric 1 is composed of an elastic stretchable elastic fiber 11 formed by a first thermoplastic polymer and an inelastic stretchable inelastic fiber formed by a second thermoplastic polymer. It has a fiber 12 and a composite fiber portion 13 in which the two fibers 11 and 12 are in parallel contact with each other in the length direction and are joined at the contact portion.
• the fibers 11 and 12 and the composite fiber portion 13 are substantially mutually welded, bonded, or mechanically entangled at a plurality of joint portions 16. They are integrated so that they do not separate.
• the elastic fibers 11 and the inelastic fibers 12 are the fiber components 21 and 22 (see Fig. 2), which are the constituents of the composite fiber 13a having almost the same structure as the composite fiber part 13.
• the nonwoven fabric 1 is formed by separating each component according to the manufacturing method. In the figure, the composite fiber portion 13 mainly exists near the joint portion 16.
• the fineness of the elastic fiber 11 is in the range of 0.1 to 10 dtx
• the fineness of the inelastic fiber 12 is in the range of 0.05 to 2 dtX, and is preferably elastic. It is made smaller than the fineness of fiber 11.
• three inelastic fibers 12a, 12b, and 12c exist as one inelastic fiber 12 around one elastic fiber 11a (see FIG. 5). See also).
• the elastic fibers 12a, 12b, and 12c extend from the elastic fiber 11a in the vicinity of the joints 16a and 16b.
• the elastic fiber 11a and the inelastic fibers 12a, 12b, and 12c repeat such joining and branching in the length direction of the elastic fiber 11a. is there.
• the length of the inelastic fibers 12a, 12b, and 12c is longer than the length of the elastic fibers 11a between the adjacent joint portions 16a and 16b, and the elastic fibers 11 Although a extends almost straight, the inelastic fibers 12 a, 12 b, and 12 c are bent or curved into various shapes.
• elastic fibers 11a and inelastic fibers 12a, 12b, 12c appear on the upper surface 2 at a ratio of about 1: 3.
• the elastic fibers 11 a and the inelastic fibers 12 a, 12 b, and 12 c appear in the lower surface 3 in a ratio of 1: 3.
• the ratio of the number of the end portions of the elastic fibers 11 and the inelastic fibers 12 that can be seen on the cut surface 4a of the nonwoven fabric 1 is as follows: the elastic fibers 11a and the inelastic fibers 12a, 12b, 1 It is almost equal to 1: 3, the ratio of the number to 2 c.
• the use of the nonwoven fabric 1 is not particularly limited. If it is intended to be used for touching human skin, the linear distance between adjacent joints 16a and 16wa on one elastic fiber 11a is 0.5 to 10mm. And the length of each inelastic fiber 12a, 12b, 12c between the joint positions 16a and 16b is equal to the elastic fiber 11a. It is preferably in the range of 1.2 to 5 times the length along.
• the nonwoven fabric 1 When the nonwoven fabric 1 thus formed is held in a hand and pulled, for example, in the direction A or the direction B perpendicular to the direction A, the nonwoven fabric 1
• the fiber 11 elastically expands, and its direction is changed so that the inflexible fiber 12 that has been bent or curved extends in the A direction or the B direction.
• the elastic fiber 11 returns to the state shown in Fig. 1 due to the elastic restoring force of the elastic fiber.
• the elastic fibers 11 that elastically expand and contract generally have a rubbery feel, but in the nonwoven fabric 1, a plurality of inelastic fibers 12 surround the elastic fibers 11.
• the feel of the surface 2 and 3 of the nonwoven fabric 1 is similar to the feel of the inelastic fiber 12 and has good slip.
• the smoothness of the nonwoven fabric 1 can be adjusted by the fineness and cross-sectional shape of the inelastic fibers 12 disposed around the elastic fibers 11, the number of the inelastic fibers 12, and the like. If the fineness of the inelastic fiber 12 is made as small as possible, for example, about 0.5 to 1.5 dtx, the surfaces 2 and 3 become soft in addition to the slipperiness.
• FIG. 2 and 3 are a cross-sectional photograph of the composite fiber 13a used for manufacturing the nonwoven fabric 1 and a drawing in which the composite fiber 13a in the photograph is traced.
• Each of the multiple composite fibers 13a shown in FIG. 2 is substantially the same in terms of having a diameter of 25 to 30 micron, and has a single fibrous elastic fiber component.
• the three fibrous non-woven fabrics which are arranged at substantially equal intervals in the circumferential direction on the surface of the elastic fiber component 21 and the elastic fiber component 21 are detachably joined to the elastic fiber component 21.
• the elastic fiber component 22 is formed.
• the composite fiber 13a has the same composition and almost the same structure as the composite fiber portion 13 in FIG. 1, and forms each of the elastic fiber component 21 and the inelastic fiber component 22.
• thermoplastic first polymer and the thermoplastic second polymer can be obtained by simultaneously extruding from a nozzle of a spinning extruder according to a known technique.
• the first surface portions 51 adjacent to each other in the circumferential direction and the second surface portions 52 located between the first surface portions 51 cooperate with each other to make the second surface portions 52 bottom.
• the groove 53 is formed such that The groove 53 includes three grooves 53a, 53b and 53c, and extends in the length direction of the elastic fiber component 21.
• the inelastic fiber component 22 consists of three inelastic fiber components 22a, 22b, 22c located in the grooves 53a, 53b, 53c, respectively.
• the fiber component 21 extends in the longitudinal direction.
• Examples of the first polymer used to obtain the elastic fiber component 21 in the composite fiber 13a include thermoplastic polyurethane, thermoplastic polyurethane containing a lubricant, and other thermoplastic elastomers. There is Tomah.
• thermoplastic polymer that is incompatible with the first polymer and that extends inelastically.
• the term “incompatible” as used herein means that when the composite fiber 13 a in FIG. 2 has a weak bonding force to the elastic fiber component 21 of the inelastic fiber component 22 and the composite fiber 13 a elongates, This means that the elastic fiber component 22 is easily separated from the elastic fiber component 21.
• the second polymer having such properties include a polyolefin-based polymer such as polyethylene and polypropylene, and a polyamide-based polymer such as nylon. Polypropylene can be used whether it is a homopolymer or a copolymer.
• polypropylene preferably has a crystallinity of 30% or less based on the DSC method, more preferably has a crystallinity of 20% or less, and has a hard elastomer. Use what is not considered fiber.
• the first polymer used for the elastic fiber component 21 contains a lubricant such as a fatty acid amide, separation between the elastic fiber component 21 and the inelastic fiber component 22 is facilitated.
• Elastic Examples of fiber components 2 1, JIS.
• inelastic fibers A specific example of component 22 is a polypropylene having an MFR (menoletov mouth rate) of 30 at 230 ° C. and 2.16 kg / cm 2 .
• the weight ratio of the elastic fiber component 21 to the inelastic fiber component 22 in the composite fiber 13a is preferably in the range of 20:80 to 90:10.
• the portion of the peripheral surface composed of the inelastic fiber component 22 preferably occupies 40 to 90% of the perimeter of the conjugate fiber 13a.
• the cross-sectional area and shape of the elastic fiber component 21 and the inelastic fiber component 22 are determined by the fineness of the elastic fiber 11 obtained from these components 21 and 22. Is in the range of 0.1 to LOdtx, and the fineness of the inelastic fiber 12 is smaller than that of the elastic fiber 11 and is in the range of 0.05 to 2 dtX.
• the inelastic fiber component 22 has a flat cross-sectional shape such as an oval shape, and preferably has a flat cross-sectional shape even when the inelastic fiber 12 is formed. It is preferable that the inelastic fiber 12 having a flat cross-sectional shape has a major dimension larger than twice the minor dimension and can be flexibly bent.
• the nonwoven fabric 1 of FIG. 1 is manufactured as follows.
• the composite fiber 1 3 a is rather to prefer using one made of continuous fibers, the composite fiber 1 3 a continuously fed in the machine direction, the grammage of 1 0 ⁇ 5 0 0 g / m 2 Shaping the web You.
• the web is subjected to embossing under heating, jetting high-pressure columnar water, or hot-air blowing to separate the composite fibers 13a from each other.
• An unweldably welded or entangled joint 16 as shown in FIG. 1 is formed intermittently in at least one of the machine direction and the cross direction to this direction.
• the web is moved in at least one of the directions in which the joining portions 16 are formed intermittently within the range of elastic deformation of the elastic fiber component 21 and the inelastic fiber component 2. It elongates at a breaking elongation of 2 or less, for example, 70% or more. Thereafter, the web is shrunk by the restoring force of the elastic fiber component 21 to obtain the nonwoven fabric 1 shown in FIG.
• the elastic fiber component 21 and the inelastic fiber component 22 of the composite fiber 13a are connected to each other on the composite fiber 13a between the adjacent bonding portions 16 on the composite fiber 13a, for example, as shown in FIG. It is separated into one elastic fiber 11 and three inelastic fibers 12 between the joints 16a and 16b shown in FIG.
• each elastic fiber 11 contracts almost linearly or in a gentle curve between the adjoining joint portions 16a and 16b, while The elastic fibers 12 contract while forming a curve that intersects the elastic fibers 11 and the inelastic fibers 12.
• FIGS. 4 and 5 show elastic fibers 11 a, which are examples of elastic fibers 11, and inelastic fibers 1, which are examples of inelastic fibers 12, on the upper surface 2 of the nonwoven fabric 1 of FIG.
• FIG. 2 is an enlarged plan view of 2a, 12b, and 12c, and a view showing a V-V line cut plane in the plan view.
• the elastic fiber component 21 of the composite fiber 13a and the inelastic fiber component 22 of the composite fiber 13a are near the joints 16a and 16b. There is no separation, and the composite fiber 13a remains as the composite fiber portion 13.
• the elastic fibers 11a extend almost linearly between the joining portions 16a and 16b adjacent to each other on the separated elastic fibers 11a, while the inelastic fibers 12a, 1 2 b and 1 2 c extend while drawing curves of various shapes.
• the elastic fiber 11a and the inelastic fiber 12b intersect and overlap each other, and at the intersection, the elastic fiber 11a is located inside the nonwoven fabric 1 in the thickness direction.
• the inelastic fiber 12b is located outside in the thickness direction.
• the inelastic fibers 12a, 12b, and 12c are distributed around the fiber 11a so as to surround the elastic fiber 11a.
• FIG. 6 is an enlarged perspective view of the elastic fiber 11a in FIG.
• the first curved surface part 61 having a small radius and the second convex part which becomes convex from the outside toward the center.
• the two curved surface portions 62 are formed so as to be alternately repeated in the circumferential direction of the elastic fiber 11.
• a groove 63 extending in the length direction of the elastic fiber 11a is formed.
• first curved surface portion 61, the second curved surface portion 62, and the groove portion 63 are the same as those of the first surface portion 51, the second surface portion 52, and the groove portion 53 in the composite fiber 13a of FIG. This is the corresponding section.
• the skin easily contacts the inelastic fibers 12a, 12b, and 12c, and the elasticity is high.
• Non-elasticity of non-woven fabric 1 makes it difficult to contact fiber 11a, and non-elasticity of non-woven fabric 1 tends to be close to that of fiber 12 You.
• the upper surface 2 of the nonwoven fabric 1 is rubbery, and Since the elastic fiber 11 a having poor slippage is buried in the non-conductive fiber 12, the tendency becomes stronger. Further, as shown in FIG.
• the elastic fiber 11a mainly comes into contact with the skin 69 shown by the imaginary line near the first curved surface portion 61. Therefore, the second curved surface portion 62 hardly comes into contact with the skin 69.
• the peripheral surface of the elastic fiber 11a touches the skin 69 only in a small part of the peripheral surface and is limited to a portion having a small radius of curvature.
• the area of contact with the skin 69 tends to be smaller than when the cross-sectional shape having the same cross-sectional area is circular. The smaller the contact area between the elastic fibers 11 and the skin 69, the better the nonwoven fabric 1 slides on the skin 69.
• the lower surface 3 may be in the form of the upper surface 2 in FIG. 1, or both of the surfaces 2, 3 may be in the form of FIG.
• FIG. 7 is a view similar to FIG. 5 when the nonwoven fabric 1 is pulled in the direction A in FIG.
• the inelastic fibers 12a, 12b and 12c in Fig. 5 move in the directions of arrows P, Q and R.
• Approaching the elastic fiber 11a as shown in FIG. 7 surrounding the fiber 11a. Since the degree of orientation of the inelastic fiber 12 in FIG. 7 in the direction of arrow A in FIG. 4 increases, the nonwoven fabric 1 slides well in the direction of arrow A.
• 8 and 9 are drawings similar to FIGS. 2 and 3 showing one example of the composite fiber 13a used in the present invention.
• the composite fiber 13a has a diameter of about 15 micron and has an elastic fiber component 21 having a semicircular cross section that is separably joined to each other, and an inelastic fiber component having a similar semicircular cross section. 2 2
• the cross section of the composite fiber 13a is substantially circular, and the inelastic fiber component 22 that appears on the peripheral surface occupies about 50% of the perimeter of the composite fiber 13a.
• the length of the inelastic fiber generated from the inelastic fiber component 22 is the same as the length of the elastic fiber generated from the elastic fiber component 21. It is longer than the length of.
• a web made of a composite fiber 13a in which the elastic fiber component 21 has the groove 53 shown in FIG. 3 and the inelastic fiber component 22 is in the groove 53 is used.
• the nonwoven fabric 1 is manufactured in such a manner, the fineness of the inelastic fiber 12 can be easily made smaller than the fineness of the elastic fiber 11.
• FIG. 10 is a diagram illustrating a cross-sectional shape of the composite fiber 13a.
• the cross-sectional shape of the conjugate fiber 13 a of (a) is different from that of the conjugate fiber 13 a of FIG. 9, and one groove portion 53 is formed in the elastic fiber component 21.
• two grooves 53 are formed in the elastic fiber component 21.
• four grooves 53 are formed in the elastic fiber component 21. According to the present invention, it is possible to form 1 to 16 grooves 53 in the elastic fiber component 21 in this manner. Wear.
• FIG. 11 is a side view of a tester 70 used to evaluate the smoothness of the nonwoven fabric in the present invention.
• Test 1 70 is a plate that can increase the inclination angle ⁇ with respect to the horizontal plane at a constant speed using the motor 7 3 and a block 7 for attaching the nonwoven fabric to be evaluated.
• the upper surface of the plate # 1 is made of stainless steel having a surface roughness of 12.5 s specified in JIS # 0601.
• the block 72 is made of stainless steel having a weight such that a surface pressure of 10 g / cm 2 acts on the nonwoven fabric 1.
• the nonwoven fabric is attached to the block 72 so as to cover the entire lower surface of the block 72.
• the plate 71 on which the block 72 is placed is pivoted about the axis 74 so that the angle of inclination with respect to the horizontal plane increases at a speed of 2 ° Z sec. 7 Obtain the inclination angle at the start of sliding on the upper surface of 1 and let the value at that time be the sliding angle s .
• Slip angle a s value is small Ku I see of, non-woven fabric is slippery for the skin.
• the sliding angle s of men's and women's underwear shirts and pans made of 100% of cotton measured by this tester 70 is in the range of about 21 ° to 25 °.
• Table 1 the nonwoven fabric of Example obtained by that you use the composite fiber 1 3 a in FIG. 2, 3 according to the present invention, the slip angle shed s between nonwoven and the Comparative Example shown ing.
• the nonwoven fabric in the examples was obtained by subjecting a web having a basis weight of 50 g / m 2 to hot embossing in the machine direction and in a direction crossing the machine direction.
• the composite fiber 13a is made of thermoplastic polyurethane and polypropylene, and the weight ratio of both is in the range of 84.4: 15.6 to 67.9: 32.1.
• composite fiber 1 A perimeter of 3a with a proportion of polypropylene in the range of about 70 to 90% was used.
• the nonwoven fabric of the comparative example is made of a thermoplastic polyurethane fiber or a polypropylene fiber. Obtained by subjecting a web having a basis weight of 50 g / m 2 to the same hot embossing treatment as the web in the example. It was done. In the hot embossing treatment in the example and the comparative example, a plurality of heating embossed areas of 0.3 mm 2 were formed at a pitch of 2 mm in the machine direction and the cross direction for each web. As is clear from Table 1, the slip angle s of the nonwoven fabric 1 changes depending on the proportion of the inelastic fiber component 22, polypropylene, in the circumference of the composite fiber 13 a.
• the slip angle s of the nonwoven fabric 1 can be adjusted by the ratio of the inelastic fiber component 22 to the circumference of the composite fiber 13a.
• the nonwoven fabric 1 is used for a wearable article, it is preferable to adjust the sliding angle s of the upper surface 2 and / or the lower surface 3 in the range of 25 ° to 40 °.
• thermoplastic poly urethane and a poly propylene Those having a weight ratio in the range of 20:80 to 90:10 can be used.
• composite fiber 13a a fiber in which the proportion of polypropylene in the circumference thereof is in the range of 40 to 90% can be used.
• the nonwoven fabric according to the present invention can be used for manufacturing disposable wearing articles and the like.
• the production method according to the present invention enables production of such a nonwoven fabric.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Nonwoven Fabrics (AREA)
• Multicomponent Fibers (AREA)

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• 2003
  • 2003-09-12 JP JP2003321935A patent/JP4705321B2/ja not_active Expired - Fee Related
  • 2003-09-19 AU AU2003264529A patent/AU2003264529A1/en not_active Abandoned
  • 2003-09-19 EP EP20030797711 patent/EP1559822B1/en not_active Expired - Lifetime
  • 2003-09-19 WO PCT/JP2003/012025 patent/WO2004027138A1/ja active Application Filing
  • 2003-09-19 CA CA 2498765 patent/CA2498765A1/en not_active Abandoned
  • 2003-09-19 KR KR1020057004652A patent/KR20050057435A/ko not_active Application Discontinuation
  • 2003-09-19 TW TW92126004A patent/TW200407478A/zh unknown
  • 2003-09-19 CN CNB038222442A patent/CN100402725C/zh not_active Expired - Fee Related
  • 2003-09-22 US US10/666,732 patent/US20040132374A1/en not_active Abandoned

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