WO2022176797A1 - 多層構造織編物 - Google Patents

多層構造織編物 Download PDF

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Publication number
WO2022176797A1
WO2022176797A1 PCT/JP2022/005596 JP2022005596W WO2022176797A1 WO 2022176797 A1 WO2022176797 A1 WO 2022176797A1 JP 2022005596 W JP2022005596 W JP 2022005596W WO 2022176797 A1 WO2022176797 A1 WO 2022176797A1
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WIPO (PCT)
Prior art keywords
outer layer
knitted fabric
composite synthetic
woven
synthetic fiber
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Ceased
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PCT/JP2022/005596
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English (en)
French (fr)
Japanese (ja)
Inventor
鳥谷部慧悟
鈴木英俊
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Toray Industries Inc
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Toray Industries Inc
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Priority to JP2022510823A priority Critical patent/JP7841425B2/ja
Publication of WO2022176797A1 publication Critical patent/WO2022176797A1/ja
Anticipated expiration legal-status Critical
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D11/00—Double or multi-ply fabrics not otherwise provided for
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/30—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the fibres or filaments
    • D03D15/37—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the fibres or filaments with specific cross-section or surface shape
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/14—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes

Definitions

  • the present invention relates to a multilayer structure woven or knitted fabric.
  • Patent Literature 1 proposes a fabric with increased bulkiness and heat retention by raising synthetic fibers.
  • Patent Document 2 proposes a woven or knitted fabric using eccentric core-sheath type synthetic fibers in which a high-shrinkage component is curved after heat treatment to develop a three-dimensional crimped structure.
  • Fibrous waste generated from washing, etc. is generally removed from the washing liquid and washing drainage, etc. and discarded. Considering the possibility of various problems such as an increase in waste, waste water treatment load, and maintenance load for washing machines, etc., the smaller the fiber waste, the better.
  • an object of the present invention relates to a woven or knitted fabric containing synthetic fibers, and provides a woven or knitted fabric that has heat retention equivalent to that of conventional raised materials, is excellent in water absorption and quick drying, and generates less fiber waste during washing. That is.
  • the present invention has the following configuration to solve the above problems.
  • At least one of the outer layers of the multi-layered woven or knitted fabric contains a side-by-side type or eccentric core-sheath type composite synthetic fiber composed of two types of polymers, A component and B component, and any of the following (a) to (c) A multi-layered woven or knitted fabric that satisfies
  • the multi-layered woven or knitted fabric is a woven fabric, and the composite synthetic fibers are mostly used as warp yarns in the outer layer, the crossing points of the warp yarns of the outer layer containing the composite synthetic fibers and the weft yarns are different from the outer layer. Less than the intersection of the warp yarns with the weft yarns of the opposite outer layer.
  • the loop length of the fibers constituting the outer layer containing the composite synthetic fiber is different from that of the outer layer. is 70% or less of the loop length of the fibers constituting the outer layer on the opposite side, and in the case of the multi-layer warp knitted fabric, the composite synthetic fiber is arranged in at least a part of the front reed, and The sinker loop length per rack is 70 cm or more.
  • the number of fluff protruding from the folded end surface is 15/1 cm or less when observed after being mountain-folded with the weft direction as the axis.
  • the multilayer structure woven or knitted fabric according to (2) is 15/1 cm or less when observed after being mountain-folded with the weft direction as the axis.
  • At least one of the outer layers of the multi-layer structure woven or knitted fabric contains a side-by-side type or eccentric core-sheath type composite synthetic fiber composed of two types of polymers, A component and B component, and the outer layer contains the composite synthetic fiber.
  • FIG. 1 is an example of a cross-sectional shape of a side-by-side composite synthetic fiber used in the present invention.
  • FIG. 2 is an example of the cross-sectional form of the eccentric sheath-core composite synthetic fiber used in the present invention, and is a fiber cross-section for explaining the center of gravity position in the fiber cross-section.
  • FIG. 3 shows an example of the woven structure of the outer layer 1 in a multi-layered woven fabric in which many of the composite synthetic fibers are used as warp yarns.
  • FIG. 4 is an example of the weave structure of the outer layer 2 in a multi-layered woven fabric in which many of the composite synthetic fibers are used as warp yarns.
  • FIG. 1 is an example of a cross-sectional shape of a side-by-side composite synthetic fiber used in the present invention.
  • FIG. 2 is an example of the cross-sectional form of the eccentric sheath-core composite synthetic fiber used in the present invention, and is a fiber cross-section for explaining the center of gravity position in the
  • FIG. 5 shows an example of the weave structure of the outer layer 1 in a multi-layered woven fabric in which many of the composite synthetic fibers are used as wefts.
  • FIG. 6 is an example of the weave structure of the outer layer 2 in a multi-layered woven fabric in which many of the composite synthetic fibers are used as wefts.
  • FIG. 7 is an example of the multilayer circular knitted fabric of the present invention.
  • FIG. 8 shows an example of the multilayer warp knitted fabric of the present invention.
  • the multi-layered woven or knitted fabric according to the present invention is characterized in that at least one of the outer layers of the multi-layered woven or knitted fabric contains a side-by-side type or eccentric core-sheath type composite synthetic fiber composed of two types of polymers, the A component and the B component. .
  • the multi-layered woven or knitted fabric used in the present invention includes a woven or knitted fabric having a structure of two or more layers in one piece of fabric, and at least one of the outer layers of the multi-layered woven or knitted fabric contains the composite synthetic fiber described later.
  • the outer layer on the opposite side of the outer layer may similarly contain the composite synthetic fibers.
  • the composite synthetic fiber used in the present invention has a fiber cross section composed of two types of polymers, the A component and the B component.
  • the component that shrinks more when subjected to heat treatment for developing crimps is the A component (high shrinkage component), and the other is the B component (low shrinkage component).
  • the composite form of the composite synthetic fiber used in the present invention is a side-by-side type or an eccentric core-sheath type. Specifically, it is preferable to adopt a side-by-side type as exemplified in FIG. 1 or an eccentric sheath-core type as exemplified in FIG. FIG.
  • FIG. 1 is an example of the cross-sectional shape of the side-by-side type composite synthetic fiber used in the present invention, showing a state in which component A 1 and component B 2 are combined side-by-side.
  • FIG. 2 is an example of the cross-sectional form of the eccentric sheath-core composite synthetic fiber used in the present invention, and is a fiber cross-section for explaining the center of gravity position in the fiber cross-section.
  • the A component 1 is the core component
  • the B component 2 is the sheath component, and as will be described later, the center of gravity point a of the A component in the cross section of the composite synthetic fiber and the center of gravity point C of the cross section of the composite synthetic fiber are eccentric core and sheath.
  • a type composite structure is shown.
  • composite synthetic fibers used in the present invention usually take the form of multifilaments.
  • the combination of components A and B includes (1) a combination of polymers that cause a difference in shrinkage when subjected to heat treatment, and (2) a difference in melt viscosity of 10 Pa s or more between the polymers to be combined.
  • Combinations of polymers with varying degrees of molecular weight and/or composition are suitable, and the like. In general, higher melt viscosities and higher molecular weights tend to shrink more when heated under conditions that allow crimping.
  • Suitable polymers for achieving the object of the present invention include polyalkylene terephthalates (polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polytrimethylene terephthalate, etc.), polyesters such as polylactic acid, polyamides, thermoplastic polyurethanes, polyphenylenes. Sulfides and polyolefins (polyethylene, polypropylene, etc.) can be mentioned.
  • the molecular weights of the polymers used such as the suitable polymers exemplified above, are changed so that the A component shown in FIG. 1 or 2 is a high molecular weight polymer, and the B component is can use low molecular weight polymers.
  • the A component shown in FIG. 1 or 2 is a high molecular weight polymer
  • the B component is can use low molecular weight polymers.
  • one component can be used as a homopolymer and the other component can be used as a copolymer.
  • component A/component B includes polybutylene terephthalate/polyethylene terephthalate, polytrimethylene terephthalate/polyethylene terephthalate, thermoplastic polyurethane/polyethylene terephthalate, polytrimethylene terephthalate/polybutylene terephthalate, and the like.
  • component A/component B includes polybutylene terephthalate/polyethylene terephthalate, polytrimethylene terephthalate/polyethylene terephthalate, thermoplastic polyurethane/polyethylene terephthalate, polytrimethylene terephthalate/polybutylene terephthalate, and the like.
  • Various combinations are mentioned. In these combinations, heat treatment causes differential shrinkage, and a finely crimped shape can be obtained.
  • polyester polyamide, polypropylene, etc. are preferably used.
  • polyester is more preferable because it also has mechanical properties.
  • the polyester referred to here is preferably polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, copolymers thereof with a dicarboxylic acid component, diol component or oxycarboxylic acid component, or blends of these polyesters. mentioned.
  • These polymers may optionally contain inorganic fine particles, organic compounds, carbon black as matting agents such as titanium oxide, flame retardants, lubricants, antioxidants, coloring pigments, etc., to the extent that the objects of the present invention are not impaired. can be included.
  • the composite area ratio of the A component and the B component in the cross section of the fiber is 70:30 to 30 as the area ratio of the A component:B component from the viewpoint of crimp development.
  • a range of 70 is preferred, and a range of 65:35 to 35:65 is more preferred.
  • the cross-sectional shape of both components has a substantially circular outer peripheral shape and an irregularity of 1.0 to 2.6.
  • the degree of irregularity is defined as the length of the long axis, which is the diameter of the circumscribed circle of the cross section of the composite synthetic fiber, and the short axis, which is the distance between two points of intersection of the composite interface of the cross section and the surface of the fiber. Defined by dividing by length.
  • the composite area ratio of the A component and the B component in the cross section of the fiber is the high shrinkage component as the A component or the high molecular weight polymer in view of the crimp expression.
  • a fine spiral structure can be easily realized by increasing the ratio.
  • the ratio of both components is preferably in the range of 70:30 to 30:70 as the area ratio of component A:component B, and 65:35 to 65:35. A range of 45:55 is more preferred.
  • the eccentric core-sheath type composite synthetic fiber has a composite cross section formed by bonding two different polymers, and the two polymers having different polymer properties are present in a bonded state without being substantially separated. , one polymer is arranged in the sheath portion and the other polymer is arranged in the core portion. Among them, the eccentric core-sheath type in which the A component is completely covered with the B component is preferable.
  • eccentricity means that the position of the center of gravity of the A component polymer in the cross section of the composite synthetic fiber is different from the center of the cross section of the composite synthetic fiber.
  • horizontal hatching is the B component 2
  • 45 deg hatching is the A component 1
  • the center of gravity of the A component in the cross section of the composite synthetic fiber is indicated by a
  • the center of gravity of the cross section of the composite synthetic fiber is indicated by C.
  • a combination of polyesters is more preferable because it has good crimp and mechanical properties and excellent dimensional stability against humidity and temperature changes.
  • the use of polybutylene terephthalate (PBT) as the component A is particularly preferred because it has good crimps and forms a bulky heat insulating layer to obtain a woven or knitted fabric with high heat retention.
  • Polytrimethylene terephthalate (PPT) can also be preferably used as the A component because it has a high degree of crimp and forms a bulky heat insulating layer to obtain a woven or knitted fabric having high heat retention.
  • the distance between the center of gravity point a of the A component in the cross section of the composite synthetic fiber and the center of gravity point C of the cross section of the composite synthetic fiber allows the fiber to bend greatly toward the high shrinkage component side after heat treatment.
  • the high-shrinkage component shrinks relatively more strongly than the low-shrinkage component, so that the eccentric sheath-core composite synthetic fiber continues to bend in the fiber axis direction.
  • the eccentric core-sheath type composite synthetic fiber has a three-dimensional spiral structure and exhibits good crimp.
  • the cross-sectional form of the composite synthetic fiber is preferably an eccentric core-sheath type.
  • the single filament fineness of the composite synthetic fiber used in the present invention is preferably 1.0 dtex or less. More preferably, it is 0.8 dtex or less.
  • a finer spiral structure is formed by using a composite synthetic fiber having a fineness of single filament. That is, the voids between single yarns become finer, and each void functions as a heat insulating layer, resulting in a material with high heat retention.
  • the lower limit is preferably 0.1 dtex or more from the point of view that physical properties such as snagging and pilling do not significantly deteriorate due to the fineness reduction of the single filament.
  • the composite synthetic fiber used in the present invention can have a total fineness of 10 dtex or more and 600 dtex or less. Furthermore, the preferred range for clothing is 10 dtex or more and 300 dtex or less.
  • the multi-layered woven or knitted fabric used in the present invention contains the composite synthetic fiber in at least one of the outer layers of the multi-layered woven or knitted fabric.
  • the composite synthetic fiber in the outer layer of the multi-layer structure woven or knitted fabric By arranging the composite synthetic fiber in the outer layer of the multi-layer structure woven or knitted fabric, crimping of the composite synthetic fiber during heat treatment is effectively expressed as described later, and the multi-layer structure fabric has heat retention equivalent to that of conventional raised materials. A knitted fabric is obtained.
  • the conjugate synthetic fibers having fine crimps in the outer layer even when single yarn breakage occurs, the fibers are effectively suppressed from falling off at the crimped portion, and fiber waste during washing. The amount generated can be reduced.
  • the multi-layer structure woven or knitted fabric of the present invention may contain the composite synthetic fibers on both sides of the outer layer.
  • the area ratio of the conjugate synthetic fibers in the outermost layer is measured for each of the front and back outer layers, and the outer layer having the larger area ratio is calculated as above ( Any one of a) to (c) shall be satisfied.
  • the outer layer that satisfies any one of the above (a) to (c) is referred to as the outer layer containing the composite synthetic fibers or the outer layer 1.
  • the outer layer on the side opposite to the outer layer 1 is referred to as an outer layer 2 .
  • a method for measuring the area ratio of the composite synthetic fibers will be described in detail in Examples.
  • the outer layer (outer layer 1) containing the composite synthetic fiber is used as the surface that comes into contact with the skin. In that case, the outer layer 1 becomes a so-called back layer.
  • fibers other than the composite synthetic fibers can be used.
  • natural fibers such as cotton, silk, and animal fibers (wool)
  • synthetic fibers such as polyester fibers, polyamide fibers, and polyurethane fibers
  • semi-synthetic fibers such as acetate, and regenerated cellulose fibers.
  • synthetic fibers such as polyester fibers and polyamide fibers are preferably used from the viewpoint of quick drying.
  • the form of fibers other than the composite synthetic fibers may be spun yarns or multifilament yarns, but multifilament yarns are preferably used in terms of suppressing shedding of fiber waste.
  • the cotton count can be set in the range of 10 or more.
  • the preferred range for clothing is from No. 20 to No. 170.
  • the total fineness can be set within a range of 10 dtex or more and 600 dtex or less.
  • the preferred range for clothing is 10 dtex or more and 300 dtex or less.
  • the multi-layer structure woven or knitted fabric used in the present invention is a multi-layer fabric
  • various double weaves such as warp double weave and weft double weave, multiple weaves, and modified structures thereof can be used. Any texture can be selected for the outer layer (outer layer 1) having the composite synthetic fiber and the outer layer (outer layer 2) on the opposite side thereof, as long as the regulations are satisfied.
  • the multi-layered woven or knitted fabric regardless of whether the multi-layered woven or knitted fabric is a multi-layered woven fabric, a multi-layered circular knitted fabric or a multi-layered warp knitted fabric, the woven or knitted fabric that is less likely to inhibit the appearance of crimps during heat treatment of the composite synthetic fibers located in the outer layer. Structure is important.
  • the multi-layered woven or knitted fabric of the present invention has a structure in which crossing points and restraints that inhibit the development of crimps in the composite synthetic fibers of the present invention are suppressed in the outer layer.
  • the multilayer structure woven or knitted fabric of the present invention will be described for each structure.
  • the multi-layered woven or knitted fabric of the present invention is a woven fabric
  • the outer layer (outer layer 1) containing the composite synthetic fiber when the composite synthetic fiber is mostly used as the warp, the crossing point of the warp of the outer layer 1 with the weft is , the warp yarns of the outer layer 2 are multi-layered fabric structures with fewer intersection points with the weft yarns.
  • the intersecting point means a point in each outer layer where the weft yarns are overlaid on the outer layer side (outermost layer) with respect to the warp yarns.
  • the weft yarn that interlaces on the inner layer side does not restrain the warp yarn from the outside, and the composite synthetic fiber used for the warp yarn is crimped during heat treatment. are not included here because they do not interfere with
  • the use of a large amount of the composite synthetic fibers as warp means that in the outer layer (outer layer 1) containing the composite synthetic fibers, the warp use area ratio of the composite synthetic fibers located in the outermost layer is large.
  • FIG. 3 and 4 show an example of the weave structure of the outer layer 1 and the outer layer 2 in the multi-layered fabric when the composite synthetic fibers are used as warp yarns.
  • FIG. FIG. 4 shows an example of the weave of the outer layer 1 in this case, and FIG. 4 shows an example of the weave of the outer layer 2 thereof.
  • the outer layer 1 is formed by weaving the warp 3 and the weft 4 containing the composite synthetic fiber, and the crossing point 5 is the point where the weft 4 overlaps the warp 3 so as to protrude toward the outer layer. indicates that In FIG.
  • the outer layer 2 is composed of the warp yarns 6 and the weft yarns 7 , and the points where the weft yarns 7 protrude from the warp yarns 6 to the outer layer side and overlap each other are the crossing points 8 . That is, in the multi-layer fabric of the present invention, when many of the conjugate synthetic fibers are used as warps, the crossing points 5 of the warp and the weft of the outer layer 1 containing the conjugate synthetic fiber shown in FIG. It is a multi-layered fabric structure with fewer intersection points 8 . In FIG. 3, the warp yarns 6 and weft yarns 7 illustrated in FIG. 4, and in FIG. 4, the warp yarns 3 and weft yarns 4 illustrated in FIG. and
  • the ratio of warp crossing points (the number of crossing points of the warp of the outer layer 1 with the weft) )/(the number of crossing points of the warp and the weft of the outer layer 2) is preferably 0.3 to 0.7, more preferably 0.4 to 0.6.
  • a warp crossing point ratio of 0.3 or more is preferable in that physical properties such as snagging and pilling due to a decrease in crossing points of the warp and the weft do not occur significantly.
  • the intersection point of the weft of the outer layer 1 with the warp is different from the outer layer. It is a multi-layer fabric structure with fewer crossings of the wefts with the warps of the opposite outer layer (outer layer 2). The reason for using this structure is the same as in the above-described outer layer 1, in which the composite synthetic fibers are mostly used as warp yarns.
  • FIG. 5 and 6 show an example of the weave structure of the outer layer 1 and the outer layer 2 in a multi-layered fabric when the composite synthetic fiber is used in large amounts as wefts
  • FIG. FIG. 6 shows an example of the weave of the outer layer 1 in this case
  • FIG. 6 shows an example of the weave of the outer layer 2 thereof.
  • the outer layer 1 is formed by weaving the warp yarn 9 containing the composite synthetic fiber and the weft yarn 10
  • the crossing point 11 is the point at which the warp yarn 9 protrudes from the weft yarn 10 to the outer layer side and overlaps. indicates that In FIG.
  • the outer layer 2 is composed of the warp yarns 12 and the weft yarns 13, and the points where the warp yarns 12 protrude from the weft yarns 13 to the outer layer side and overlap each other are the crossing points 14.
  • FIG. That is, in the multi-layer fabric of the present invention, when many of the composite synthetic fibers are used as wefts, the crossing points 11 of the wefts of the outer layer 1 containing the composite synthetic fibers shown in FIG. It is a multi-layer fabric structure with fewer intersections 14 . 5, the warp yarn 12 and the weft yarn 13 illustrated in FIG. 6, and the warp yarn 9 and the weft yarn 10 illustrated in FIG. and
  • the ratio of weft crossing points described later in Examples (the number of crossing points of the wefts of the outer layer 1 with the warp) / ( The crossing point of the wefts and warps of the outer layer 2) is preferably 0.3 to 0.7, more preferably 0.4 to 0.6.
  • a warp double structure is used to configure the outer layer 1. It is preferable to use the composite synthetic fiber for the warp that forms the outer layer 2 and another fiber for the warp that constitutes the outer layer 2 , because the composite synthetic fiber is unevenly distributed in the outer layer 1 and the effect of improving heat retention is enhanced.
  • the composite synthetic fiber is used as the weft in the outer layer 1 in a large amount, a weft double weave is used, and the composite synthetic fiber is used for the weft constituting the outer layer 1, and another fiber is used for the weft constituting the outer layer 2. This is preferable because the composite synthetic fibers are unevenly distributed in the outer layer 1 and the effect of improving heat retention is enhanced.
  • the knitted structure is not particularly limited as long as it satisfies the provisions of the present invention.
  • multi-layer circular knit fabrics in addition to double circular knit fabrics, single circular knit fabrics are selected if they have a multilayer structure such as an inlay structure or plating structure that allows different fibers to be unevenly distributed on the front and back. can do.
  • a double tricot knitted fabric, a double raschel knitted fabric, a single tricot knitted fabric, and a single raschel knitted fabric can be selected.
  • the surface knitted on the front reed side is arranged on the outer layer, and the surface knitted on the back reed side is arranged on the inner layer.
  • it belongs to the category of multi-layer warp knitted fabrics.
  • the loop length of the fibers constituting the outer layer 1 in the outer layer (outer layer 1) containing the composite synthetic fiber is the outer layer (outer layer 2) is less than or equal to 70% of the loop length of the fibers constituting .
  • the outer layer, in which the area ratio of the composite synthetic fiber is large contains 70 area % or more of the composite synthetic fiber from the viewpoint of improving the heat retention due to the increase in the area occupied by the composite synthetic fiber.
  • 100 area % is preferable from the point of being the most heat-retaining.
  • the loop length of the fibers forming the outer layer 1 is more preferably 50% or less of the loop length of the fibers forming the outer layer 2.
  • the lower limit is 20% or more because physical properties such as snag and pilling tend to decrease due to a decrease in the loop length of the fibers constituting the outer layer 1, that is, a decrease in the number of knitting loops (intersecting points). is preferred.
  • the proportion of the composite synthetic fibers in the outer layer 1 is high, and the loop length of the fibers that make up the outer layer 1 is shorter than the loop length of the fibers that make up the outer layer 2 .
  • the loop lengths of the fibers constituting the outer layer 2 and the outer layer 1 can be controlled by changing the knitting structure. This means selecting an organization with less formation of In the knitted loop portion, the fibers are constrained by the adjacent knitted loops. Therefore, the more knitted loops are formed in the tissue, the more the composite synthetic fiber develops crimps during heat treatment, which is the same as the description regarding the crossing point of the multilayer fabric.
  • the loop length of the fibers constituting the outer layer 1 is 70% or less of the loop length of the fibers constituting the outer layer 2, the crimp expression of the composite synthetic fibers is promoted, and the conventional raising A multi-layered circular knitted fabric having heat retention equivalent to that of the material can be obtained.
  • the loop length is a value obtained by the method described later.
  • the composite synthetic fiber is used as the back yarn constituting the outer layer 1, and another composite synthetic fiber is used as the front yarn constituting the outer layer 2. Fibers are preferably used.
  • the composite synthetic fiber in the outer layer 1 the composite synthetic fiber is unevenly distributed and the effect of improving heat retention is enhanced, which is preferable.
  • FIG. 7 shows an example of the multilayer circular knitted fabric of the present invention, which is a multilayer circular knitted fabric structure of an inlay structure composed of fibers A15 constituting an outer layer 1 containing the composite synthetic fibers and fibers B16 constituting an outer layer 2. .
  • the loop length of the fibers A15 constituting the outer layer 1 is 70% or less of the loop length of the fibers B16 constituting the outer layer 2.
  • the circular knitted fabric has less fiber restraint due to knitting loops in the fibers A15, and as described above, has a structure that promotes the appearance of crimps during heat treatment of the composite synthetic fibers.
  • the composite synthetic fiber is arranged in at least a part of the front reed, and the sinker loop length per rack in the front reed is 70 cm or more.
  • the outer layer 1 is the layer on the front reed side containing the composite synthetic fiber
  • the outer layer 2 is the outer layer on the opposite side.
  • the fibers arranged in the front reed are generally located in the outermost layer on the sinker loop surface. Therefore, in the present invention, by arranging the composite synthetic fiber in the front reed, crimping due to heat treatment is easily generated without being inhibited.
  • the sinker loop length per rack in the front reed is set to 70 cm or more, among the total yarn lengths constituting the multi-layer warp knitted fabric, there are fewer intersecting points between yarns than needle loops. Since the ratio of the weight used in the sinker loop is preferably increased and the development of crimps in the composite synthetic fiber is promoted, a multi-layer warp knitted fabric having heat retention equivalent to that of conventional raised materials can be obtained. Since the needle loops form knitted loops together with the fibers knitted by the other reed, the number of intersecting points increases. The expression of crimps is not easily inhibited during heat treatment.
  • the sinker loop length per rack in the front reed is preferably 85 cm or longer, more preferably 100 cm or longer. Such a range is preferable because the expression of crimps in the composite synthetic fiber is further promoted and contributes to the improvement of heat retention. Practically, the upper limit is preferably 200 cm or less from the viewpoint of suppressing deterioration of physical properties such as snags and pilling in sports/outdoor clothing applications and clothing applications that come in direct contact with the skin.
  • FIG. 8 shows an example of a multi-layer warp knitted fabric of the present invention, which consists of a sinker loop A17 of fibers containing the composite synthetic fiber knitted with the front reed and a sinker loop B18 of fibers knitted with the back reed.
  • a multilayer warp knitted fabric knitted with a satin structure As illustrated in FIG. 8, the multi-layer warp knitted fabric of the present invention having a sinker loop length of 70 cm or more per rack in the front reed has a number of sinker loops A17 containing the composite synthetic fiber in the wale direction per course. (Number of underlaps) is large, and as described above, it is a structure that promotes crimp development during heat treatment of the composite synthetic fiber.
  • a multi-layer warp knitted fabric when fibers other than the composite synthetic fibers are used for the purpose of patterning, texture adjustment, etc., it is preferable to arrange them outside the front reed. As described above, due to the structure of the multilayer warp knitted fabric, the fibers arranged in the front reed constitute the outermost layer of the multilayer warp knitted fabric. It is preferable to use other fibers other than the front reed in order to improve the heat retention by arranging them, and to combine them for other purposes.
  • the outer layer (outer layer 1) containing the composite synthetic fiber contains 50 area % or more of the composite synthetic fiber in both the multilayer circular knitted fabric and the multilayer warp knitted fabric. is preferred, and 70 area % or more is more preferred. As for the upper limit, 100 area % is preferable from the point of being the most heat-retaining. This is because the outer layer 1 has a structure that promotes crimp development of the conjugate synthetic fibers, and therefore, the more the conjugate synthetic fibers are contained, the higher the effect of improving heat retention is, which is preferable.
  • the term "containing 50 area % or more" means that the area ratio of the composite synthetic fibers to the fibers forming the outermost layer is 50% or more. The measuring method will be described in detail in Examples.
  • the composite synthetic fiber used in the present invention is preferably false-twisted before use. This is because false twisting can prevent the phases of crimps between single yarns from being aligned, thereby allowing finer crimps to be obtained, and as a result, heat retention is improved.
  • the false twisting method any method such as a commonly used pin type, friction disk type, nip belt type, or air twisting type may be used.
  • one-stage heater false-twisting or two-stage heater false-twisting can be appropriately selected. For example, when one-stage heater false twisting is performed, the stretchability of the woven or knitted fabric is emphasized, and two-stage heater false twisting is used to suppress dimensional changes and abnormal shrinkage during the processing process. can.
  • the composite synthetic fiber used in the present invention and another fiber (the same composite synthetic fiber may be used) as a plied yarn or a mixed fiber.
  • mixed fibers interlace mixed fibers, taslan mixed fibers, propriety of false twisting, and mixed fibers of two or more types can be appropriately selected and used depending on the purpose.
  • the composite synthetic fiber used in the present invention can be produced by a two-step method in which the extruded polymer is temporarily wound as an undrawn yarn and then drawn, a direct spinning drawing method in which spinning and drawing steps are continuously performed, a high-speed spinning method, etc. It can be manufactured in any process. Further, since the range of spinning speed in the high-speed spinning method is not particularly specified, a step of winding the yarn as a semi-drawn yarn and then drawing it may be used. Further, yarn processing such as false twisting can be performed as necessary.
  • any ordinary drawing method can be used in addition to hot roll-hot roll drawing and hot pin drawing. Moreover, it may be stretched while being entangled or false-twisted depending on the application. In order to suppress complex abnormalities such as fluffing and separation of both components, the drawn yarn is preferably drawn so that the residual elongation is 25 to 50%. Heat setting is performed in a stretched state, and the molecular chains are structurally fixed by cooling to a temperature below the glass transition temperature while maintaining tension.
  • the sheet it is preferable to pass the sheet through cooling rolls in a stretched state of about 0.3 to 3.0%, since a high shrinkage stress can be obtained.
  • the spinning and winding are performed in a state where stress strain is applied to the shrinking polymer side (for example, the A component of the present invention) in order to develop crimps, viscoelasticity is applied before forming the woven or knitted fabric after winding. Delayed shrinkage may occur depending on the behavior, and streaks may form in the woven or knitted fabric.
  • the delayed shrinkage can be suppressed by completely covering the component on one side with the component on the other side, which also contributes to obtaining a uniform woven or knitted fabric. can be done.
  • high-molecular-weight polymers, high-elasticity polymers, etc. which could not be used until now, can be used as the high-shrinkage component.
  • the spinning temperature is preferably set at +20 to +50°C higher than the melting point of the polymer.
  • the temperature higher than the melting point of the polymer by +20 ° C. or more, it is possible to prevent the polymer from solidifying and clogging in the spinning machine pipe, and by setting the temperature to be higher than +50 ° C., excessive polymer It is preferable because heat deterioration can be suppressed.
  • the conjugate synthetic fiber used in the present invention is preferably obtained by a melt spinning method, but the spinneret may have any commonly used internal structure as long as it can be spun with stable quality and operation.
  • a desired cross-sectional shape can be obtained by suitably using a distribution plate type die as exemplified in JP-A-2011-174215, JP-A-2011-208313, and JP-A-2012-136804.
  • the conjugate synthetic fiber used in the present invention preferably has a single filament fineness of 1.0 dtex or less. It is also possible to obtain it by producing it as a composite fiber and then eluting and removing the sea component. However, for reasons described below, direct spinning is preferred. In other words, by covering the bimetal structure composite fiber with the sea-island eluted component, it is possible to obtain a fiber with a fine single filament fineness while improving the spinnability. The manufacturing cost of knitted fabrics tends to increase.
  • a woven or knitted fabric made of bimetallic composite fibers obtained by sea-island elution is likely to be set before crimp development occurs in the yarn by applying heat before elution, and the crimp development effect tends to be reduced. It should be noted that if the crimp development effect is reduced, the heat retention of the woven or knitted fabric tends to be lowered.
  • using a fiber containing a sea-island elution component as the mixed yarn as the other of the composite synthetic fibers of the present invention does not cause a decrease in heat retention as described above, and poses no problem.
  • the method of dyeing the multi-layered woven or knitted fabric used in the present invention is not particularly limited. Examples include scouring, relaxation, heat setting, dyeing processing, weight reduction processing, and functional processing. Functional finishing can be water-repellent, antistatic, flame-retardant, hygroscopic, antibacterial, soft finishing, and other known functional finishing, as required.
  • the raising process promotes the shedding of fibers due to single yarn breakage, and the amount of fiber waste that falls off from the raising portion during washing tends to be large, which is not preferable.
  • the multi-layered woven or knitted fabric used in the present invention has the outer layer (outer layer 1) having the composite synthetic fiber as the crest side, and when observed by mountain-folding with the weft direction as the axis, the number of fluff protruding from the folded end surface is 15/ It is preferably 1 cm or less. This can be achieved when the outer layer 1 of the multi-layered woven or knitted fabric used in the present invention is not intentionally raised by a raising process or the like. Dropping can be effectively suppressed. When the number of fluffs is 10/1 cm or less, it is possible to further suppress the shedding of fiber waste during washing, which is preferable.
  • the lower limit is preferably 0 pieces/1 cm.
  • the outer layer (outer layer 1) having the composite synthetic fiber is on the crest side and the weft direction is used as the axis
  • the outer layer (outer layer 1) having the composite synthetic fiber is on the crest side, and the weft direction is folded. It means to make a mountain fold so that the ridgeline of the mountain is formed in parallel.
  • outer layer (outer layer 1) having a composite synthetic fiber is made the crest side, and the crest is folded so that the twill line of the crest is formed parallel to the wale direction.
  • the multilayer structure woven or knitted fabric used in the present invention preferably has a heat retention clo value of 0.75 or more. This is a performance that is exhibited by the high heat retention of the composite synthetic fiber used in the present invention. A multi-layered woven or knitted fabric having high heat retention is obtained. When it is desired to improve the heat retention clo value, a weave or knitted structure that further reduces the intersection points of the composite synthetic fibers in the multi-layered woven or knitted fabric may be appropriately selected. Although there is no particular upper limit, it is industrially about 1.20.
  • the multilayer structure woven or knitted fabric used in the present invention preferably has a diffusible residual moisture content of 20% or less, more preferably 10% or less 60 minutes after 0.3 mL of water is dropped.
  • the diffusible residual moisture content after 60 minutes is 20% or less, it can be worn extremely comfortably in sports/outdoor applications and clothing applications that come into direct contact with the skin.
  • the lower limit is preferably 0%, it is industrially about 0.05%.
  • the multi-layered woven or knitted fabric used in the present invention contains the composite synthetic fibers having fine inter-filament voids in the skin surface when the outer layer (outer layer 1) containing the composite synthetic fibers is used as a back layer to form a textile product. Therefore, due to the capillary effect, the water absorbing and diffusing properties are good, and the water diffusion area is remarkably improved. Therefore, it is possible to obtain a woven or knitted fabric having a multi-layered structure, which has not been heretofore available, and has a heat retention property equivalent to that of a conventional raised material, while having a high quick-drying property.
  • fiber waste generated during washing can be evaluated by the following method.
  • Use a lockstitch sewing machine use polyester filament for the sewing thread, number of stitches: 13 stitches/3 cm) to sew the glued part of the sealing tape and the edge of the fabric so that it does not come off.
  • the effective evaluation area of the cloth as used in the present invention means the area of one side of the portion of the cloth excluding the portion treated to prevent the fibers from coming off. A total of two test pieces are prepared in the same procedure. By carrying out such a treatment, it is possible to prevent the cut portion of the woven or knitted fabric from being exposed during washing, suppress the fraying or falling off of the fibers in the cut portion, and remove the fiber waste that falls from the outer layer of the woven or knitted fabric. Accurate evaluation becomes possible.
  • a washing test is carried out on the obtained two test pieces, and fiber waste is collected using a collector, such as a collection bag (filter) attached to the drain hose of the washing machine, and the weight is evaluated.
  • a collector such as a collection bag (filter) attached to the drain hose of the washing machine, and the weight is evaluated.
  • a specific method is as follows.
  • the washing process and the spin-drying process are performed twice each without putting in the washing object and the detergent.
  • the conditions are set to be the same as the washing conditions to be evaluated.
  • the present invention uses a C-type standard washing machine. In addition, if the washing machine has a built-in filter, remove it because it affects the amount of collection.
  • Washing in the present invention is carried out according to the 4N method of the C-type standard washing machine specified in ISO 6330 (2012).
  • the fiber waste discharged from the washing machine drain is collected by attaching a collector to the drain hose of the washing machine.
  • a “nylon screen” NY10-HC purchased from Flon Kogyo Co., Ltd., catalog value: opening 10 ⁇ m
  • opening 10 ⁇ m opening 10 ⁇ m
  • the fiber waste collected by the collector is sucked and filtered using a filter whose weight has been measured after absolute drying.
  • a polycarbonate membrane K040A047A manufactured by Advantech Toyo Co., Ltd.
  • the filter after filtration and the fiber waste are dried at 105° C. for 1 hour and weighed, and the difference between the weight before filtration is defined as the amount of fiber waste. After heating at 105° C. for 1 hour, the temperature and humidity are controlled at 20° C. and 65% RH, and then the weight is measured.
  • the multilayer structure woven or knitted fabric of the present invention can achieve 12.0 (mg / 2 test pieces) or less as the amount of fiber waste collected after the main test, and in a preferred embodiment, 10.0 ( mg/2 specimens) or less can also be achieved.
  • the lower limit is preferably closer to 0 (mg/2 test pieces), but in reality, the normal measurement limit is about 0.1 (mg/2 test pieces).
  • Warp area ratio (%) of the composite synthetic fiber (warp area ratio to the total area) x (use ratio of the composite synthetic fiber in the warp)
  • Weft area ratio (%) of the composite synthetic fiber (weft area ratio to the total area) x (use ratio of the composite synthetic fiber in the weft)
  • Warp crossing point ratio (average of 10 crossing points of warp and weft of outer layer 1)/(average of 10 crossing points of warp and weft of outer layer 2)
  • the outer layer 2 is marked so that the knitted fabric width for 100 wales can be seen.
  • the fibers constituting the outer layer 2 of the multilayer circular knitted fabric are decomposed using a decomposing needle or the like, a tension of 0.1 g/dtex is applied to the decomposed fibers, and the loop length between the marked 100 wales is measured. The same measurement was repeated 10 times, and the average value represents the loop length of the fibers forming the outer layer 2 .
  • the fibers forming the outer layer 1 were also measured for the loop length between 100 wales, and the average value of 10 wales was obtained.
  • Sinker loop length per 1 rack of front reed in multilayer warp knitted fabric For a multilayer warp knitted fabric, observe at any position on the sinker loop surface with a microscope at a magnification of 50 to 100 times, and knit with the front reed. Measure the sinker loop length per course of the woven fiber. The same measurement is randomly repeated 20 times, and the average value of 20 points is obtained. Multiply this by 480 to obtain the sinker loop length per rack (480 courses).
  • a sample is cut into a size of 5 cm length ⁇ 3 cm weft, and a boundary line is drawn on the outer layer 1 so that a central 1 cm area with respect to a width of 3 cm in the weft direction can be identified.
  • the cut sample is mountain-folded with the weft direction as the axis, placed on the microscope stage, and a slide glass (preferably 26 cm ⁇ 76 cm in size) is gently placed on the mountain-folded portion. Focus on the position of the highest curvature of the multilayer structure woven or knitted fabric.
  • the focus is slightly lowered from the highest curvature position, 3D focus stacking is performed, and the observation position is adjusted so that all fluff near the folded surface can be confirmed.
  • the number of fluff protruding from the folded surface is counted in the area within the 1 cm weft width where the boundary line was drawn.
  • Ten sheets of the above sample were prepared, and the number of fluffs on the ten sheets was averaged by the same measurement method.
  • the heat retention clo value is obtained according to the following formula, and measured once for each of three test pieces, and is expressed as the average value of three measurements.
  • clo value (1/0.155) x ( ⁇ T x A)/W
  • ⁇ T difference between hot plate temperature and ambient temperature (°C)
  • W power consumption (W) for 60 seconds of test
  • A hot plate area (0.01 m 2 ).
  • a “nylon screen” NY10-HC manufactured by Flon Kogyo Co., Ltd., catalog value: opening 10 ⁇ m
  • an opening of 11.3 ⁇ m actual value
  • the two test pieces which had been subjected to anti-shedding treatment on the edge of the fabric, were placed in a washing machine and washed under the washing conditions of the ISO6330C4N method. However, detergent and load cloth were not used.
  • the lint adhering to the "nylon screen” was suction-filtered using a pre-weighed polycarbonate membrane (K040A047A manufactured by Advantech Toyo Co., Ltd.). After filtration, the polycarbonate membrane and fiber waste were dried at 105° C. for 1 hour and weighed, and the difference between the weight before filtration was defined as the amount of fiber waste generated.
  • Example 1 (Reeling method and evaluation of eccentric sheath-core composite synthetic fiber) Polybutylene terephthalate (PBT) as the A component, polyethylene terephthalate (PET) as the B component, and after melting the A component polymer and the B component polymer at 270 ° C. and 280 ° C. respectively using an extruder, pump The spinning temperature was set to 290° C., which is 30° C. higher than the melting point of the B component, which is the highest melting point of each polymer, and was flowed into the spinneret while maintaining the temperature.
  • PBT Polybutylene terephthalate
  • PET polyethylene terephthalate
  • the weight composite ratio of the A component and the B component was set at 50/50, and the components were flowed into a spinneret for eccentric sheath-core composite synthetic fibers having 72 discharge holes.
  • the respective polymers were joined inside the die to form an eccentric core-sheath type composite form in which the polymer of component A was included in the polymer of component B, and discharged from the die.
  • a spinneret of a distribution plate type was used so as to obtain the eccentric sheath-core composite fiber shown in FIG.
  • the yarn extruded from the spinneret is cooled by an air cooling device, oiled, and then wound by a winder at a speed of 1500 m/min so that the spinning draft is 220, and is stably wound as an undrawn yarn of 150 dtex-72 filament.
  • the cooling start point is set at 97 mm from the ejection surface of the spinneret
  • the lubricating position is set at 1130 mm from the ejection surface of the spinneret, resulting in a spinning stress of 0.10 cN/dtex, which suppresses longitudinal yarn unevenness and stabilizes spinning performance. planned.
  • the obtained undrawn yarn is sent to a drawing device at a speed of 300 m/min, and drawn at a drawing ratio of 2.63 times so that the drawing temperature is 90 ° C. and the elongation is about 20 to 40%. It was heat set at 130° C. to obtain an eccentric core-sheath composite drawn yarn (PBT/PET) of 56 dtex-72 filaments.
  • PBT/PET eccentric core-sheath composite drawn yarn
  • the resulting multi-layer fabric had a ratio of outer layer 1/outer layer 2 crossing points of 0.48, and had a structure in which the outer layer 1 had fewer crossing points than the weft and warp crossing points in the outer layer 2. Also, the number of fluffs in the outer layer 1 was two. In addition, the heat retention clo value was 0.77, and the diffusible residual moisture content after 60 minutes was 5%. Moreover, in the multi-layered woven fabric obtained according to the above embodiment, the collected fiber waste amount was 9.0 (mg/2 test pieces). Wearing comfort evaluation for warmth was an average of 2.7 points.
  • the sensory evaluation of the texture when wet was B/A after 1 minute/60 minutes, and a multi-layered woven fabric was obtained that did not easily feel wet on the skin immediately after wetting.
  • the resulting multi-layered fabric had a structure in which crimp development of the composite synthetic fibers was promoted during heat treatment in the skin surface portion, so that the composite synthetic fibers having water absorption quickly delivered moisture to the outer layer 2 by capillary effect, In addition, the fine and bulky crimps acted as a spacer between the outer layer 2 and the surface of the skin, and thus the same effect was exhibited.
  • Example 2 As the front yarn, 84 dtex-72 filament normal PET false twisted yarn (DTY) is used, and at the same time, 33 dtex polyurethane elastic yarn (PU) is bare-inserted. Using an eccentric core-sheath type composite false twist textured yarn (DTY) of filaments, it was knitted with an inlay structure (the backing yarn has a floating structure with three stitches skipped) on a 28G single circular knitting machine. After that, a multi-layered circular knitted fabric was produced by a normal dyeing process and a water absorbing process.
  • DTY eccentric core-sheath type composite false twist textured yarn
  • the area ratio of the composite synthetic fibers in the outer layer 1 is 85%, and the loop length of the fibers constituting the outer layer 1 is 36.6% of the loop length of the fibers constituting the outer layer 2. there were.
  • the number of fluffs in the outer layer 1 was 3.
  • the heat retention clo value was 0.77, and the diffusible residual moisture content after 60 minutes was 3%.
  • a multi-layered circular knitted fabric was obtained which does not easily feel wet even when wet.
  • Example 3 The 56dtex-72 filament eccentric core-sheath type composite false twisted textured yarn (DTY) obtained in Example 1 is used for the front reed, and the 56dtex-72 filament normal PET false twisted textured yarn (DTY) is used for the back reed. Then, a multi-layer warp knitted fabric was knitted with a 28G single raschel knitting machine. The front weave was 10/34//, and the back weave was 12/10//, and both were threaded in a full set. After that, a multi-layer warp knitted fabric was produced by ordinary dyeing processing and water absorption processing. In the multi-layer warp knitted fabric, the outer layer 1 was a sinker loop surface.
  • the obtained multilayer warp knitted fabric had a sinker loop length of 138 cm per rack of the composite synthetic fiber in the front reed.
  • the number of fluffs in the outer layer 1 was 3.
  • the heat retention clo value was 0.75
  • the diffusible residual moisture content after 60 minutes was 3%.
  • a multilayer warp knitted fabric that does not feel wet even when wet is obtained.
  • Example 4 155dtex-48 filament normal PET false twist textured yarn (DTY) is used as the weft and the warp constituting the outer layer 2, and the 56dtex-72 filament eccentric core obtained in Example 1 is used as the warp constituting the outer layer 1.
  • DTY 155dtex-48 filament normal PET false twist textured yarn
  • Example 2 the 56dtex-72 filament eccentric core obtained in Example 1 is used as the warp constituting the outer layer 1.
  • a sheath type composite false twisted yarn (DTY) weave the outer layer 2 with a 2/2 twill structure and the outer layer 1 with a 7/1 twill structure using a rapier loom, then apply the normal dyeing method and water absorption processing. to create a multilayer fabric.
  • the ratio of the composite synthetic fibers used as warp yarns in the outer layer 1 is high.
  • the loop length of the fibers forming the outer layer 1 was 55.8% of the loop length of the fibers forming the outer layer 2.
  • the number of fluffs in the outer layer 1 was 23, and the structure was such that the shedding of single yarns was facilitated. It has a heat retention clo value of 0.77 and a diffusible residual moisture content of 30% after 60 minutes. Although it has excellent heat retention, it does not dry quickly, making it unsuitable for sports and outdoor applications and clothing that comes into direct contact with the skin. be.
  • the collected fiber waste amount was 16.4 (mg/2 test pieces).
  • the loop length of the fibers forming the outer layer 1 was 143.5% of the loop length of the fibers forming the outer layer 2.
  • the number of fluffs in the outer layer 1 was 26, and the structure was such that the shedding of single yarns was facilitated.
  • the heat retention clo value is 0.91, and the diffusible residual moisture content after 60 minutes is 43%. Although it has excellent heat retention, it does not dry quickly, making it unsuitable for sports and outdoor applications and clothing that comes into direct contact with the skin. be.
  • the amount of collected fiber waste was 26.2 (mg/2 test pieces).
  • Example 3 Using the 56 dtex-72 filament eccentric core-sheath type composite false twist textured yarn (DTY) obtained in Example 1, a circular knitted fabric with a jersey structure was knitted with a 28G single circular knitting machine. After that, a single-layer circular knitted fabric was produced by a normal dyeing process and water absorption process.
  • DTY 56 dtex-72 filament eccentric core-sheath type composite false twist textured yarn
  • the number of fluffs in the outer layer 1 of the single-layer circular knitted fabric obtained was 1.
  • the heat retention clo value is 0.71
  • the diffusible residual moisture content after 60 minutes is 3%, and although it is excellent in quick drying, it is a structure with many intersecting points between yarns, and the crimp of the composite synthetic fiber. Because of the structure that inhibits the expression of , no improvement in heat retention was observed.
  • the amount of collected fiber waste was 8.4 (mg/2 test pieces). Wearing comfort evaluation for warmth was 1.7 on average, and sensory evaluation for wet texture was D/A after 1 minute/60 minutes.
  • the resulting single-layer circular knitted fabric had many intersecting points of the composite synthetic fibers arranged on the skin surface, was insufficient in crimp development, and lacked warmth.
  • a sufficient air layer between the outer layer 2 and the skin surface could not be secured, and the structure had a wet feeling immediately after wetting, like a general material.
  • Example 4 The 56 dtex-72 filament eccentric core-sheath type composite false twisted textured yarn (DTY) obtained in Example 1 was used for the warp and weft, and after weaving as a plain weave with a rapier loom, a normal dyeing method and water absorption were performed. The processing produced a single layer fabric.
  • the number of fluffs in the outer layer 1 of the obtained single-layer fabric was 1.
  • the heat retention clo value is 0.71, the diffusible residual moisture content after 60 minutes is 1%, and although it is excellent in quick drying, it is a structure with many intersecting points between yarns, and the crimp of the composite synthetic fiber. Because of the structure that inhibits the expression of , no improvement in heat retention was observed.
  • the collected fiber waste amount was 7.0 (mg/2 test pieces). Wearing comfort evaluation for warmth was 2.0 on average, and sensory evaluation for wet texture was E/A after 1 minute/60 minutes.
  • the single-layer fabric thus obtained had insufficient crimp development of the composite synthetic fibers as in Comparative Example 3, and lacked warmth.
  • a sufficient air layer between the outer layer 2 and the skin surface could not be secured, and the structure was such that the fabric felt wet immediately after wetting, as with general materials.
  • the multi-layered woven or knitted fabric used in the present invention achieves both warmth and the effect of reducing sweat chills, and can be used extremely comfortably, especially for sports and outdoor applications for autumn and winter seasons and clothing applications that come into direct contact with the skin.
  • B component a Gravity center point of A component in composite synthetic fiber cross section
  • C Gravity center point in composite synthetic fiber cross section 3: Warp 4: Weft 5: Crossing point 6: Warp 7: Weft 8: Crossing point 9: Warp 10: Weft 11 : Intersection point 12: Warp 13: Weft 14: Intersection point 15: Fiber A 16: Fiber B 17: Sinker loop A 18: Sinker loop B

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