FABRIC AND FIBER PRODUCT

An object is to provide a cloth having excellent water absorbency, a little sticky feeling, an excellent contact cool feeling, and excellent breathability, and a fiber product using the cloth. The solution is a cloth including a flat cross-section yarn subjected to a water repellent treatment, in which a cross-section shape of a single fiber in the flat cross-section yarn is a flat cross-section having two or more constricted portions and a cross-sectional flatness of 2 to 6, and a weight ratio of the flat cross-section yarn to an entire cloth is within a range of 20 wt % to 50 wt %.

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Description
TECHNICAL FIELD

The present invention relates to a cloth having excellent water absorbency, a little sticky feeling, an excellent contact cool feeling, and excellent breathability, and a fiber product using the cloth.

BACKGROUND ART

In related art, a cloth using synthetic fibers has been widely used for general clothing, sports clothing, and the like. In order to improve wearing comfort of such a cloth, a method of reducing a single fiber fineness of synthetic fibers constituting a cloth, a method of improving water absorbency of a cloth by performing a water absorption treatment on the cloth, a method of performing a water repellent treatment on a cloth, and the like have been proposed (for example, see PTLs 1 and 2). Further, a knitted fabric has been proposed in which a multifilament having water repellency and a special crimp is disposed on a surface to be in contact with a skin to improve separation from a skin and reduce sticky with the skin during heavy sweating (see PTL 3).

However, since the multifilament having a special crimp is used, a contact area with a skin is reduced, and it cannot be said that a contact cool feeling is sufficient. Breathability is also important for the wearing comfort of the cloth, but a cloth in related art has not been satisfactory in terms of combining excellent water absorbency, a little sticky feeling, a contact cool feeling, and breathability.

CITATION LIST Patent Literature

  • PTL 1: JP2002-363843A
  • PTL 2: JPH09-195172A
  • PTL 3: JP2013-49929A

SUMMARY OF INVENTION Technical Problem

The invention has been made in view of the above-described background, and an object of the invention is to provide a cloth having excellent water absorbency, a little sticky feeling, an excellent contact cool feeling, and excellent breathability, and a fiber product using the cloth.

Solution to Problem

As a result of intensive studies to achieve the above object, the present inventors have found that, by skillfully devising a yarn form, a weight ratio, and the like of a cloth having a multilayer structure of two or more layers, a cloth having excellent water absorbency, a little sticky feeling, an excellent contact cool feeling, and excellent breathability can be obtained, and have completed the invention by further intensive studies. Thus, the following inventions are provided.

1. A cloth including:

    • a non-crimped flat cross-section yarn subjected to a water repellent treatment, in which
    • a cross-section shape of a single fiber constituting the flat cross-section yarn is a flat cross-section having two or more constricted portions and a cross-sectional flatness of 2 to 6,
    • a weight ratio of the flat cross-section yarn to an entire cloth is within a range of 20 wt % to 50 wt %, and
    • an air permeability of the cloth is 100 cc/cm2·sec or more.

2. The cloth according to the above 1, in which

    • the flat cross-section yarn is non-crimped.

3. The cloth according to the above 1 or 2, in which

    • the flat cross-section yarn is disposed on a back surface side of the cloth.

4. The cloth according to any of the above 1 to 3, in which

    • in the water repellent treatment, any one of the group consisting of a fluorine-based water repellent agent, a silicone-based water repellent agent, and a hydrocarbon-based water repellent agent is used.

5. The cloth according to the above 4, in which

    • the fluorine-based water repellent agent is a fluorine-based water repellent agent having a total concentration of perfluorooctanoic acid and perfluorooctanesulfonic acid of 5 ng/g or less.

6. The cloth according to any of the above 1 to 5, in which

    • a total fineness of the flat cross-section yarn is within a range of 33 dtex to 167 dtex.

7. The cloth according to any of the above 1 to 6, in which

    • the number of filaments of the flat cross-section yarn is within a range of 12 to 84.

8. The cloth according to any of the above 1 to 7, in which

    • the flat cross-section yarn is made of a polyester.

9. The cloth according to any of the above 1 to 8, in which

    • a false twisted and crimped textured yarn is contained in a surface other than a back surface of the cloth.

10. The cloth according to any of the above 1 to 9, in which

    • the cloth is a knitted fabric.

11. The cloth according to any of the above 1 to 10, in which

    • the cloth is a double knit.

12. The cloth according to any of the above 1 to 11, in which

    • the cloth is a weft knitted fabric, and
    • on a back surface of the weft knitted fabric, a loop occupancy rate of the flat cross-section fiber yarn is within a range of 40% to 90%.

13. The cloth according to any of the above 1 to 12, in which

    • a contact cool feeling Q-max on a back surface of the cloth is 0.2 J/cm2·sec or more.

14. The cloth according to any of the above 1 to 13, in which

    • a weight per unit of the cloth is 50 g/m2 to 200 g/m2.

15. The cloth according to any of the above 1 to 14, in which

    • water absorbency on a back surface of the cloth is 30 seconds or less as measured by a drop method according to JIS L1907-2010 7.1.1.

16. The cloth according to any of the above 1 to 15, in which

    • a wet friction force on a back surface of the cloth is 150 g or less.

17. A fiber product containing the cloth according to any of the above 1 to 16, which is selected from the group of sportswear, outdoor wear, a rain coat, men clothing, woman clothing, work clothing, protective clothing, artificial leather, footwear, a bag, a curtain, a tent, a sleeping bag, a waterproof sheet, and a car sheet.

Advantageous Effects of Invention

According to the invention, a cloth having excellent water absorbency, a little sticky feeling, an excellent contact cool feeling, and excellent breathability, and a fiber product using the cloth can be obtained.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 schematically illustrates a flat cross-section shape having constricted portions, which can be adopted as a cross-section shape of a single fiber in the invention.

FIG. 2 is a diagram of a knitting structure (double-interlock knitting) used in Example 1, in which “X” indicates cylinder knit, “O” indicates dial knit, “Y” indicates cylinder tuck, and “Y” indicates dial tuck, and the same applies hereinafter.

FIG. 3 is a diagram of a knitting structure (double-interlock knitting) used in Example 2.

FIG. 4 is a diagram of a knitting structure (double-interlock knitting) used in Example 3.

FIG. 5 is a diagram of a knitting structure (double-interlock knitting) used in Example 4.

FIG. 6 is a diagram of a knitting structure (mesh) used in Example 5.

FIG. 7 is a diagram of a knitting structure (mesh) used in Comparative Example 1.

FIG. 8 is a diagram of a knitting structure (mesh) used in Comparative Example 2.

FIG. 9 is a diagram of a knitting structure (mesh) used in Comparative Example 3.

FIG. 10 is a diagram of a knitting structure (mesh) used in Comparative Example 4.

 DESCRIPTION OF EMBODIMENTS

Hereinafter, an embodiment of the invention will be described in detail. First, a flat cross-section yarn (a flat yarn) referred to in the invention is a yarn containing a single fiber having a flat cross-section shape. It is important that such a cross-section shape of the single fiber has two or more (preferably 3 to 5) constricted portions and a cross-sectional flatness of 2 to 6, as schematically illustrated in FIG. 1. When such a flat cross-section yarn is used, a contact with a skin is not a planar contact as with a general flat cross-section yarn, but is a point contact due to a convex curve between the constricted portion and the constricted portion, which reduces a sticky feeling. The cross-sectional flatness is a ratio (B/C1) of a length (B) of a long side to a length (C1) of a short side, as illustrated in FIG. 1. The constricted portion is a portion where the length of the short side is shortened, as schematically illustrated in FIG. 1. In such a constricted portion, a depth of a concave portion is preferably a depth at which a ratio (C1/C2) of a maximum value to a minimum value of the length of the short side is 1.05 or more (preferably 1.1 to 2.0). FIG. 1 illustrates a case where there are three constricted portions.

A polymer that forms the flat cross-section yarn may be a normal fiber-forming polymer such as a polyester-based polymer, a polyamide-based polymer, or a polyolefin-based polymer, and is preferably a polyester-based polymer in terms of weather resistance and fiber strength.

Preferred examples of such a polyester-based polymer include polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid, stereocomplex polylactic acid, and a polyester copolymerized with a third component. Such a polyester may be a materially recycled or chemically recycled polyester, or polyethylene terephthalate obtained by using a monomer component obtained from biomass, that is, a biological substance as a raw material described in JP2009-091694A. Further, such a polyester may be a polyester obtained using a catalyst containing a specific phosphorus compound and a specific titanium compound as described in JP2004-270097A and JP2004-211268A.

The polymer may contain, as necessary, one or more of the following agents within the scope of the invention: a matting agent, an antibacterial agent, a micropore-forming agent, a cationic dye dyeable agent, a coloring inhibitor, a heat stabilizer, a fluorescent brightening agent, a coloring agent, a moisture absorbent, and inorganic fine particles. For example, it is preferable to incorporate a matting agent into a polymer contained in the polymer to form a semi-dull polyester or a full-dull polyester, which can impart a see-through-preventing property and infrared and ultraviolet shielding properties to the cloth. The antibacterial agent may be not only a natural antibacterial agent or an inorganic antibacterial agent, but also an antibacterial agent obtained by subjecting a polyester copolymerized with an ester-forming metal sulfonate compound or an ester-forming phosphonium sulfonate compound to an acidic treatment, as described in WO2011/048888.

A method for producing the flat cross-section yarn is not particularly limited, and the flat cross-section yarn can be produced, for example, by the following method. That is, using a spinneret perforated on a flat cross-section, for example, a chip obtained by blending the above polyester having intrinsic viscosity of 0.55 to 0.80 with a matting agent as necessary in an amount of 1.0 wt % or more with respect to a weight of the polyester is spun by a routine procedure and then wound as an undrawn yarn (an intermediate oriented yarn) at a speed of 2000 m/min to 4300 m/min and then drawn, or the chip is drawn before being wound to obtain a multifilament. Alternatively, the intermediate oriented yarn may be heat-treated in a relaxed state (overfeed 1.5% to 10%) using a heater heated to 180° C. to 200° C. to form an undrawn yarn (an intermediate oriented yarn) having self-extensibility under heat.

In the invention, the flat cross-section yarn is preferably a non-crimped yarn. The non-salt condensation means that crimping such as false twisting and crimping is not applied, and means that a crimp degree measured by the following method is 5% or less (most preferably 0%).

(Method for Measuring Crimp Degree)

A test yarn is wound around a measuring machine having a circumferential length of 1.125 m to prepare a hank with a dry fineness of 3333 dtex. The hank is hung from a hanging nail of a scale plate, an initial load of 6 g is applied to a lower portion of the hank, and a length L0 of the hank when a load of 600 g is further applied thereto is measured. Immediately thereafter, the load is removed from the above hank, the hank is removed from the hanging nail of the scale plate, and the hank is immersed in boiling water for 30 minutes to develop crimps. The hank after the boiling water treatment is removed from the boiling water, water contained in the hank is absorbed and removed with filter paper, and then the hank is air-dried at room temperature for 24 hours. The air-dried hank is hung from the hanging nail of the scale plate, a load of 600 g is applied to a lower portion of the hank, and a length L1a of the hank is measured after one minute, after which the load is removed from the hank, and a length L2a of the hank is measured after one minute. The crimp degree (CP) of the filament yarn under test is calculated by the following formula.

CP ⁢ ( % ) = ( ( L ⁢ 1 ⁢ a - L ⁢ 2 ⁢ a ) / L ⁢ 0 ) × 100

A yarn form may be a spun yarn or a long fiber (a multifilament), and a long fiber (a multifilament) is preferred in order to obtain water absorbency and a contact cool feeling. In particular, a multifilament having a number of filaments in a range of 12 to 84 (more preferably in a range of 20 to 84) and a total fineness of 33 dtex to 167 dtex (more preferably 44 dtex to 167 dtex) is preferred since more excellent water absorbency and an excellent contact cool feeling are obtained.

In the invention, the flat cross-section yarn is subjected to a water repellent treatment. In this case, a content of a water repellent agent is preferably 0.4 wt % or more (more preferably 0.4 wt % to 10 wt %) with respect to a weight of the yarn before the water repellent treatment. At this time, as the water repellent agent, any of a fluorine-based water repellent agent, a silicone-based water repellent agent, and a hydrocarbon-based water repellent agent is preferably used. The fluorine-based water repellent agent is preferably a fluorine-based water repellent agent having a concentration of perfluorooctanoic acid and perfluorooctanesulfonic acid of 0 ng/g to 5 ng/g with respect to a weight of the fluorine-based water repellent agent. Examples of such a fluorine-based water repellent agent include a perfluoroalkyl acrylate copolymer composed only of a monomer containing no N-methylol group, and a commercially available product. Examples of the silicone-based water repellent agent include amino-modified silicone, epoxy-modified silicone, and carboxy-modified silicone. Examples of the hydrocarbon-based water repellent agent include an aliphatic hydrocarbon, an aliphatic carboxylic acid, an olefin, a polyacrylic acid ester, and a polymethacrylic acid ester. Preferred examples of the commercially available fluorine-based water repellent agent include Asahiguard E Series AG-E061, a fluorine-based water and oil repellent manufactured by Asahi Glass Co., Ltd., and Scotchgard PM3622, PM490, and PM930, manufactured by Sumitomo 3M Limited. Preferred examples of the silicone-based water repellent agent include NeoseedNR-8000 manufactured by Nicca Chemical Co., Ltd. Preferred examples of the hydrocarbon-based water repellent agent include NeoseedNR-158 and NR-7080 manufactured by Nicca Chemical Co., Ltd., and UnidyneXF5001 and XF5002 manufactured by Daikin Industries, Ltd.

In the cloth of the invention, the flat cross-section yarn is preferably disposed on a back surface side (a skin side) of the cloth. A form of the fiber contained in a layer other than a back surface may be a short fiber (a spun yarn) or a long fiber (a multifilament), and a long fiber (a multifilament) is preferred for obtaining excellent water absorbency. The yarn form is not particularly limited, and may be a false twisted and crimped textured yarn obtained by subjecting a multifilament to false-twist texturing, an air-textured yarn, or a composite yarn obtained by subjecting two or more constituent yarns to air-jet intermingling or composite false texturing. In particular, a false twisted and crimped textured yarn (preferably a false twisted and crimped textured yarn having a number of filaments of 70 or more and preferably 70 to 200) is preferred since excellent water absorbency is obtained. The cross-section shape of the single fiber is not particularly limited, and may be not only a circle but also a triangle, a flat shape, a flat shape with a constriction as described above, a different cross-section shape such as a hollow shape, and the like. As described in WO2008/001920, a composite yarn (a composite false twisted and crimped textured yarn) having a torque of 30 T/m or less that is obtained by combining a false twisted and crimped textured yarn having a torque in an S direction and a false twisted and crimped textured yarn having a torque in a Z direction and performing an air entangling treatment is preferred since snagging resistance can be added to the cloth. In this case, it is preferable that the composite yarn (the composite false twisted and crimped textured yarn) has a total fineness of 40 dtex to 90 dtex and a number of filaments of 60 to 160. Further, an elastic yarn such as a polyurethane yarn (preferably having a total fineness of 10 dtex to 30 dtex and a number of filaments of 1 to 5), a conjugate yarn in which two components are bonded in a side-by-side or eccentric core-sheath configuration, or the like may be included in the cloth.

In the cloth of the invention, a cloth structure is not particularly limited. Examples of a weft knitting structure (a circular knitting structure) include plain knitting, rib knitting, double knitting, purl knitting, tuck knitting, float stitch knitting, single-bed knitting, lace knitting, plating knitting, single-interlock knitting (single-sided tuck), double-interlock knitting (double-sided tuck), miss stitch knitting, and reversible plain knitting. Examples of a warp knitted structure include inlay knitting, single denbigh stitch, single atlas stitch, double cord stitch, half stitch, half base stitch, satin stitch, half tricot stitch, reverse loop stitch, and jacquard knitting. Among them, double knit is preferred. In particular, a weft knitted fabric (a circular knitted fabric) is preferred in that it has excellent water absorbency, a little sticky feeling, a contact cool feeling, and breathability, and it is preferable that a loop occupancy rate of the flat cross-section fiber yarn on a back surface of the weft knitted fabric is within a range of 40% to 90%. Examples of a woven fabric structure include a three foundation weave such as plain weave, twill weave, and satin weave, a derivative weave, a double-layer weave such as warp-faced double weave and weft-faced double weave, and a warp Pile weave.

As for a weaving density of the cloth, in order to obtain excellent water absorbency, it is preferable that the cloth is a knitted fabric having a knitting density of 30 courses/2.54 cm to 150 courses/2.54 cm and 20 wales/2.54 cm to 130 wales/2.54 cm, or that the cloth is a woven fabric having a cover factor CF defined by the following formula of 300 to 3500 (more preferably 300 to 1000).

CF=(DWp/1.1)1/2×MWp+(DWf/1.1)1/2×MWf [DWp is a total warp fineness (dtex), MWp is a warp yarn density (yarns/2.54 cm), DWf is a total weft fineness (dtex), and MWf is a weft yarn density (yarns/2.54 cm)].

In the cloth of the invention, it is important that a weight ratio (a mixing ratio) of the water-repellent flat cross-section yarn to the entire cloth is within a range of 20 wt % to 50 wt %. When the weight ratio is less than 20%, the sticky feeling may not be reduced. On the other hand, it is not preferable the weight ratio is more than 50%, since the water absorbency may be reduced.

The cloth of the invention can be produced by a routine procedure using the above flat cross-section yarn and using a normal weaving machine or knitting machine. The cloth may be appropriately subjected to a normal post treatment such as a dyeing treatment, a weight reduction treatment, a raising treatment, a calendaring treatment, an embossing treatment, a heat storage treatment, a water absorption treatment, and an antibacterial treatment. In particular, it is preferable to perform a water absorption treatment in order to obtain excellent water absorbency. A suitable example of a method for performing such a water absorption treatment is a process in which the cloth is treated with a hydrophilizing agent such as PEG diacrylate and a derivative thereof, or a polyethylene terephthalate-polyethylene glycol copolymer in the same bath during dyeing.

In the cloth thus obtained, a weight per unit of the cloth is preferably 200 g/m2 or less (more preferably 50 g/m2 to 200 g/m2, and particularly preferably 110 g/m2 to 180 g/m2). When the weight per unit is greater than 200 g/m2, the weight of the cloth increases, and the wearing comfort of the cloth may be impaired.

Since the cloth of the invention has the above-described configuration, the cloth has excellent water absorbency, a little sticky feeling, an excellent contact cool feeling, and excellent breathability.

Here, water absorbency on a back surface of the cloth is preferably 30 seconds or less (more preferably 0.1 seconds to 1.5 seconds) as measured by a drop method according to JIS L1907-2010 7.1.1. A contact cool feeling Q-max on the back surface of the cloth is preferably 0.2 J/cm2·sec or more (more preferably 0.2 J/cm2·sec to 0.3 J/cm2·sec). A wet friction force on the back surface of the cloth is preferably 150 g or less (more preferably 10 g to 150 g). It is important that an air permeability is 100 cc/cm2·sec or more (more preferably 100 cc/cm2·sec to 400 cc/cm2·sec) as measured by a Frazier method according to JIS L1096-2010 8.26. A water reconstitution rate is preferably 80% or less (more preferably 50% to 80%).

Next, a fiber product of the invention is a fiber product containing the cloth described above, which is selected from the group of sportswear, outdoor wear, a rain coat, men clothing, woman clothing, work clothing, protective clothing, artificial leather, footwear, a bag, a curtain, a tent, a sleeping bag, a waterproof sheet, and a car sheet. In particular, clothing is preferred. It is preferable that the back surface on which the non-crimped yarn is exposed is used on a human body side.

Since such a fiber product uses the cloth described above, the fiber product has excellent water absorbency, a little sticky feeling, and wearing comfort excellent in an excellent contact cool feeling and breathability.

EXAMPLES

Examples and Comparative Examples of the invention will be described in detail, but the invention is not limited thereto. A yarn except for a flat cross-section yarn is a normal round cross-section yarn. A false twisted and crimped textured yarn having a torque of 30 T/m or less is a composite yarn obtained by aligning and commingling (air entangling) a false twisted and crimped textured yarn having a torque in an S direction and a false twisted and crimped textured yarn having a torque in a Z direction. A face yarn is a yarn that is predominantly located on a surface of a cloth that faces an outside air when the cloth is made into a fiber product, and a back yarn is a yarn that is predominantly located on a surface (a back surface) of the cloth that faces a human body when the cloth is made into the fiber product.

<Method for Measuring Weight Per Unit>

Measurement was performed according to JIS L1096-2010 8.3.

<Method for Measuring Loop Number Ratio>


Loop number ratio (%)=number of loops made of water-repellent flat cross-section fiber yarn exposed on surface/total number of loops on back surface×100

<Water Absorption Rate (Drop Method)>

Measurement was performed by a drop method according to JIS L1907-2010 7.1.1.

<Contact Cool Feeling (Q-Max)>

On a back surface side, a contact cool feeling Q-max value was measured under conditions of an environmental temperature of 20° C. and a hot plate temperature of 40° C. using Thermo lab II manufactured by Kato Tech. A back surface is a surface (a back surface) of a cloth that is located on a human body side when the cloth is made into a fiber product.

<Method for Measuring Water Residual Rate>

By the following method, a water residual rate of a back surface where a water-repellent flat cross-section yarn was exposed was measured.

In a room adjusted to a temperature of 20° C. and a humidity of 65% RH, a sample cut into a 10 cm square is dripped with 0.1 cc of distilled water on a back side of the cloth, after 3 minutes, the sample is sandwiched between filter paper, a load of 10 g/cm2 is applied, and a water residual rate is calculated from an increase in weight of the filter paper after 30 seconds.

Water ⁢ residual ⁢ rate ⁢ ( % ) = ( ( filter ⁢ paper ⁢ weight ⁢ ( gr ) ⁢ after ⁢ water ⁢ 
 dropping ) - ( filter ⁢ paper ⁢ weight ⁢ ( gr ) ⁢ before ⁢ water ⁢ dropping ) / 0.1 × 100

<Method for Measuring Wet Friction Force>

As illustrated in FIG. 1 in JPH09-195172A, a cloth (a sample) having a length of 15 cm and a width of 6 cm to be measured is placed on a metal roller having a diameter of 8 cm whose surface is polished, one end of the cloth is attached to a stress strain gauge (an U gauge), and a clip of 10 g is attached to a lower end of the cloth in order to tension the cloth. Next, while the metal roller is rotated at a surface speed of 7 cm/sec in an opposite direction of the U gauge, 1 cc of water is quietly injected accurately between the metal roller and the cloth with a syringe. At this time, the tension applied to the cloth was measured via the U gauge and recorded with a recorder, and a maximum value was defined as the wet friction force.

<Air Permeability>

An air permeability (cc/cm2·sec) was measured by a Frazier method according to JIS L1096-2010 8.26.

<Method for Measuring Torque>

A torque was measured by the following method.

A sample (a crimped yarn) of about 70 cm is stretched horizontally, and an initial load of 0.18 mN×indication tex (2 mg/de) is hung from a center thereof, and then both ends are pulled together. The yarn starts to rotate due to a residual torque, and is held as it is until the initial load stops to obtain a twisted yarn. The number of twists of the twisted yarn thus obtained over a length of 25 cm is measured with a twist detector under a load of 17.64 mN×indication tex (0.2 g/de). The obtained number of twists (T/25 cm) is multiplied by 4 to obtain a torque (T/m).

Example 1

Using a circular knitting 28G double machine, a double-sided interlocked fabric in a diagram of a knitting structure illustrated in FIG. 2 was obtained by using, as a face yarn, a non-water-repellent semi-dull polyethylene terephthalate false twisted and crimped textured yarn (66 dtex/108 filaments) having a torque of 30 T/m or less, a polyurethane yarn (ROICA (product name), total fineness 22 dtex/1 filament) as an interlocking yarn, and as a back yarn, a water-repellent full-dull polyethylene terephthalate flat cross-section yarn (a non-crimped yarn, total fineness 84 dtex/30 filaments) including a single fiber having a cross-section shape with three constricted portions and having a cross-sectional flatness of 3.2, and a non-water-repellent full-dull polyethylene terephthalate flat cross-section yarn (a non-crimped yarn, total fineness 84 dtex/30 filaments) having a cross-section shape of a single fiber with three constricted portions and having a cross-sectional flatness of 3.2.

Next, the fabric was treated in the same bath with a hydrophilizing agent (a polyethylene terephthalate-polyethylene glycol copolymer) in a dyeing process to impart water absorbency to the fabric.

The resulting fabric had excellent water absorbency, a little sticky feeling, an excellent contact cool feeling, and excellent breathability. Evaluation results are shown in Table 1.

Example 2

Using a circular knitting 28G double machine, a double-sided interlocked fabric in a diagram of a knitting structure illustrated in FIG. 3 was obtained by using, as a face yarn, a non-water-repellent full-dull polyethylene terephthalate false twisted and crimped textured yarn (total fineness 66 dtex/72 filaments) having a torque of 30 T/m or less, and a non-water-repellent semi-dull polyethylene terephthalate false twisted and crimped textured yarn (total fineness 66 dtex/72 filaments) having a torque of 30 T/m or less, a polyurethane yarn (ROICA (product name), total fineness 22 dtex/1 filament) as an interlocking yarn, and as a back yarn, a water-repellent full-dull polyethylene terephthalate flat cross-section yarn (a non-crimped yarn, total fineness 84 dtex/30 filaments) including a single fiber having a cross-section shape with three constricted portions and having a cross-sectional flatness of 3.2, and a non-water-repellent full-dull polyethylene terephthalate flat cross-section yarn (a non-crimped yarn, total fineness 84 dtex/30 filaments) including a single fiber having a cross-section shape with three constricted portions and having a cross-sectional flatness of 3.2.

Next, the fabric was treated in the same bath with a hydrophilizing agent (a polyethylene terephthalate-polyethylene glycol copolymer) in a dyeing process to impart water absorbency to the fabric.

The resulting fabric had excellent water absorbency, a little sticky feeling, an excellent contact cool feeling, and excellent breathability. Evaluation results are shown in Table 1.

Example 3

Using a circular knitting 28G double machine, a double-sided interlocked fabric in a diagram of a knitting structure illustrated in FIG. 4 was obtained by using, as a face yarn, a non-water-repellent full-dull polyethylene terephthalate false twisted and crimped textured yarn (total fineness 66 dtex/72 filaments) having a torque of 30 T/m or less, a polyurethane yarn (ROICA (product name), total fineness 22 dtex/1 filament) as an interlocking yarn, and as a back yarn, a water-repellent full-dull polyethylene terephthalate flat cross-section yarn (a non-crimped yarn, total fineness 84 dtex/30 filaments) including a single fiber having a cross-section shape with three constricted portions and having a cross-sectional flatness of 3.2, and a non-water-repellent full-dull polyethylene terephthalate flat cross-section yarn (a non-crimped yarn, 84 dtex/30 filaments) including a single fiber having a cross-section shape with three constricted portions and having a cross-sectional flatness of 3.2.

Next, the fabric was treated in the same bath with a hydrophilizing agent (a polyethylene terephthalate-polyethylene glycol copolymer) in a dyeing process to impart water absorbency to the fabric.

The resulting fabric had excellent water absorbency, a little sticky feeling, an excellent contact cool feeling, and excellent breathability. Evaluation results are shown in Table 1.

Example 4

Using a circular knitting 28G double machine, a double-sided interlocked fabric in a diagram of a knitting structure illustrated in FIG. 5 was obtained by using, as a face yarn, a non-water-repellent full-dull polyethylene terephthalate false twisted and crimped textured yarn (total fineness 66 dtex/72 filaments) having a torque of 30 T/m or less, and a non-water-repellent full-dull polyethylene terephthalate false twisted and crimped textured yarn 70 dtex/72 filaments, a polyurethane yarn (ROICA (product name), total fineness 22 dtex/1 filament) as an interlocking yarn, and as a back yarn, a water-repellent full-dull polyethylene terephthalate flat cross-section yarn (a non-crimped yarn, total fineness 84 dtex/30 filaments) including a single fiber having a cross-section shape with three constricted portions and having a cross-sectional flatness of 3.2, and a non-water-repellent full-dull polyethylene terephthalate flat cross-section yarn (a non-crimped yarn, total fineness 84 dtex/30 filaments) including a single fiber having a cross-section shape with three constricted portions and having a cross-sectional flatness of 3.2.

Next, the fabric was treated in the same bath with a hydrophilizing agent (a polyethylene terephthalate-polyethylene glycol copolymer) in a dyeing process to impart water absorbency to the fabric.

The resulting fabric had excellent water absorbency, a little sticky feeling, an excellent contact cool feeling, and excellent breathability. Evaluation results are shown in Table 1.

Example 5

Using a circular knitting 28G double machine, a mesh fabric in a diagram of a knitting structure illustrated in FIG. 6 was obtained by using, as a face yarn, a non-water-repellent full-dull polyethylene terephthalate false twisted and crimped textured yarn (total fineness 66 dtex/72 filaments) having a torque of 30 T/m or less, a non-water-repellent full-dull polyethylene terephthalate false twisted and crimped textured yarn (total fineness 66 dtex/72 filaments) as an interlocking yarn, and as a back yarn, a water-repellent full-dull polyethylene terephthalate flat cross-section yarn (a non-crimped yarn, total fineness 84 dtex/30 filaments) including a single fiber having a cross-section shape with three constricted portions and having a cross-sectional flatness of 3.2, and a non-water-repellent full-dull polyethylene terephthalate flat cross-section yarn (a non-crimped yarn, total fineness 84 dtex/30 filaments) including a single fiber having a cross-section shape with three constricted portions and having a cross-sectional flatness of 3.2.

Next, the fabric was treated in the same bath with a hydrophilizing agent (a polyethylene terephthalate-polyethylene glycol copolymer) in a dyeing process to impart water absorbency to the fabric.

The resulting fabric had excellent water absorbency, a little sticky feeling, an excellent contact cool feeling, and excellent breathability. Evaluation results are shown in Table 1.

Comparative Example 1

Using a circular knitting 30G double machine, a mesh fabric in a diagram of a knitting structure illustrated in FIG. 7 was obtained by using, as a face yarn, a water-repellent full-dull polyethylene terephthalate false twisted and crimped textured yarn (total fineness 77 dtex/72 filaments) having a torque of 30 T/m or less, as an interlocking yarn, a water-repellent full-dull polyethylene terephthalate false twisted and crimped textured yarn (total fineness 77 dtex/72 filaments) having a torque of 30 T/m or less, and as a back yarn, a non-water-repellent full-dull polyethylene terephthalate flat cross-section yarn (a non-crimped yarn, total fineness 83 dtex/72 filaments) including a single fiber having a cross-section shape with three constricted portions and having a cross-sectional flatness of 3.2, and a non-water-repellent semi-dull polyethylene terephthalate false twisted and crimped textured yarn (total fineness 88 dtex/180 filaments) having a torque of 30 T/m or less.

Next, the fabric was treated in the same bath with a hydrophilizing agent (a polyethylene terephthalate-polyethylene glycol copolymer) in a dyeing process to impart water absorbency to the fabric.

The resulting fabric had good water absorbency and a good contact cool feeling, but had poor sticky. Evaluation results are shown in Table 2.

Comparative Example 2

Using a circular knitting 28G double machine, a mesh fabric in a diagram of a knitting structure illustrated in FIG. 8 was obtained by using, as a face yarn, a non-water-repellent full-dull polyethylene terephthalate false twisted and crimped textured yarn (total fineness 66 dtex/72 filaments) having a torque of 30 T/m or less, as an interlocking yarn, a non-water-repellent full-dull polyethylene terephthalate false twisted and crimped textured yarn (total fineness 66 dtex/72 filaments) having a torque of 30 T/m or less, and as a back yarn, a non-water-repellent full-dull polyethylene terephthalate flat cross-section yarn (a non-crimped yarn, total fineness 84 dtex/30 filaments) including a single fiber having a cross-section shape with three constricted portions and having a cross-sectional flatness of 3.2, and a non-water-repellent semi-dull polyethylene terephthalate false twisted and crimped textured yarn (total fineness 66 dtex/144 filaments) having a torque of 30 T/m or less.

Next, the fabric was treated in the same bath with a hydrophilizing agent (a polyethylene terephthalate-polyethylene glycol copolymer) in a dyeing process to impart water absorbency to the fabric.

The resulting fabric had good water absorbency and a good contact cool feeling, but had poor sticky. Evaluation results are shown in Table 2.

Comparative Example 3

Using a circular knitting 28G double machine, a mesh fabric in a diagram of a knitting structure illustrated in FIG. 9 was obtained by using, as a face yarn, a non-water-repellent semi-dull polyethylene terephthalate false twisted and crimped textured yarn (total fineness 66 dtex/72 filaments) having a torque of 30 T/m or less, as an interlocking yarn, a non-water-repellent semi-dull polyethylene terephthalate false twisted and crimped textured yarn (total fineness 33 dtex/12 filaments), and as a back yarn, a water-repellent semi-dull polyester multifilament false twisted and crimped textured yarn (total fineness 74 dtex/72 filaments).

Next, the fabric was treated in the same bath with a hydrophilizing agent (a polyethylene terephthalate-polyethylene glycol copolymer) in a dyeing process to impart water absorbency to the fabric.

The resulting fabric had excellent water absorbency and a little sticky feeling, but had a poor contact cool feeling. Evaluation results are shown in Table 2.

Comparative Example 4

Using a circular knitting 28G double machine, a mesh fabric in a diagram of a knitting structure illustrated in FIG. 10 was obtained by using, as a face yarn, a non-water-repellent semi-dull polyethylene terephthalate false twisted and crimped textured yarn (total fineness 66 dtex/72 filaments) having a torque of 30 T/m or less, as an interlocking yarn, a non-water-repellent semi-dull polyethylene terephthalate false twisted and crimped textured yarn (total fineness 66 dtex/72 filaments) having a torque of 30 T/m or less, and as a back yarn, a water-repellent semi-dull polyester multifilament false twisted and crimped textured yarn (total fineness 66 dtex/48 filaments).

Next, the fabric was treated in the same bath with a hydrophilizing agent (a polyethylene terephthalate-polyethylene glycol copolymer) in a dyeing process to impart water absorbency to the fabric.

The resulting fabric had excellent water absorbency and a little sticky feeling, but had a poor contact cool feeling and a low air permeability. Evaluation results are shown in Table 2.

TABLE 1 Mixing Mixing Mixing ratio ratio ratio Example 1 (%) Example 2 (%) Example 3 (%) Yarn Face yarn SD66T108 DTY 40 FD66T72 DTY 20 FD66T72 DTY 41.1 type SD66T72 DTY 20 Interlocking yarn Elastic yarn 9 Elastic yarn 9 Elastic yarn 9.3 SD22T1 SD22T1 SD22T1 Back yarn Water-repellent 38.2 Water-repellent 38.2 Water-repellent 38.2 FD84T30FY FD84T30FY FD84T30FY flat cross-section flat cross-section flat cross-section yarn yarn yarn FD84T30FY 12.7 FD84T30FY 12.7 FD84T30FY 12.7 flat cross-section flat cross-section flat cross-section yarn yarn yarn Fabric Fabric type Double circular Double circular Double circular knit knit knit Gauge 28 28 28 Structure Double-interlock Double-interlock Double-interlock knitting knitting knitting Weight per unit (g/m2) 161 133 164 Courses (filaments/2.54 cm) 47 45 47 Wales (filaments/2.54 cm) 48 43 48 Contact cool feeling (J/cm2 · sec) 0.259 0.242 0.256 Wet friction force (g) 80 121 108 Water absorption rate (sec) 0.71 0.79 less than 0.5 Air permeability (cc/cm2 · sec) 153.7 214.7 131.3 Water residual rate (%) 62.2 58.2 77.6 Mixing Mixing ratio ratio Example 4 (%) Example 5 (%) Yarn Face yarn FD66T72 DTY 19.8 FD66T72 DTY 33.8 type FD70T72 DTY 21 Interlocking yarn Elastic yarn 8.9 FD66T72 DTY 11.2 SD22T1 Back yarn Water-repellent 37.7 Water-repellent 27.5 FD84T30FY FD84T30FY flat cross- flat cross-section section yarn yarn FD84T30FY 12.6 FD84T30FY 27.5 flat cross- flat cross-section section yarn yarn Fabric Fabric type Double circular Double circular knit knit Gauge 28 28 Structure Double-interlock Mesh knitting Weight per unit (g/m2) 132 126 Courses (filaments/2.54 cm) 40 50 Wales (filaments/2.54 cm) 46 43 Contact cool feeling (J/cm2 · sec) 0.254 0.230 Wet friction force (g) 129 73 Water absorption rate (sec) 1.04 less than 0.5 Air permeability (cc/cm2 · sec) 280.7 233.3 Water residual rate (%) 78.4 79.8

TABLE 2 Comparative Mixing Comparative Mixing Example 1 ratio (%) Example 2 ratio (%) Yarn Face yarn Water-repellent 35.5 FD66T72 DTY 34.0 type FD77T72 DTY Interlocking yarn Water-repellent 11.9 FD66T72 DTY 11.3 FD77T72 DTY Back yarn FD83T72FY 25.5 FD84T30FY 52.0 flat cross- flat cross- section yarn section yarn SD88T180 DTY 27.1 SD66T144 DTY 2.7 Fabric Fabric type Double circular Double circular knit knit Gauge 30 28 Structure Mesh Mesh Weight per unit (g/m2) 129 133 Courses (filaments/2.54 cm) 52 53 Wales (filaments/2.54cm) 41 42 Contact cool feeling (J/cm2 · sec) 0.226 0.240 Wet friction force (g) 211 160 Water absorption rate (sec) less than 0.5 less than 0.5 Air permeability (cc/cm2 · sec) 193 228.7 Water residual rate (%) 81.6 82.4 Comparative Mixing Comparative Mixing Example 3 ratio (%) Example 4 ratio (%) Yarn Face yarn SD66T72 DTY 47.8 SD66T72 DTY 33.1 type Interlocking yarn SD33T12 DTY 7.6 SD66T72 DTY 23.8 Back yarn Water-repellent 44.6 Water-repellent 43.1 SD74T72 DTY SD66T48 DTY Fabric Fabric type Double circular Double circular knit knit Gauge 28 28 Structure Mesh Mesh-backed Weight per unit (g/m2) 125 133 Courses (filaments/2.54 cm) 53 50 Wales (filaments/2.54cm) 47 47 Contact cool feeling (J/cm2 · sec) 0.171 0.177 Wet friction force (g) 62 69 Water absorption rate (sec) less than 0.5 less than 0.5 Air permeability (cc/cm2 · sec) 179.3 78.8 Water residual rate (%) 29.4 30.1

INDUSTRIAL APPLICABILITY

According to the invention, a cloth having excellent water absorbency, a little sticky feeling, an excellent contact cool feeling, and excellent breathability, and a fiber product using the cloth can be provided, and an industrial value thereof is extremely great.

Claims

1. A cloth comprising:

a flat cross-section yarn subjected to a water repellent treatment, wherein
a cross-section shape of a single fiber constituting the flat cross-section yarn is a flat cross-section having two or more constricted portions and a cross-sectional flatness of 2 to 6,
a weight ratio of the flat cross-section yarn to an entire cloth is within a range of 20 wt % to 50 wt %, and
an air permeability of the cloth is 100 cc/cm2·sec or more.

2. The cloth according to claim 1, wherein

the flat cross-section yarn is non-crimped.

3. The cloth according to claim 1, wherein

the flat cross-section yarn is disposed on a back surface side of the cloth.

4. The cloth according to claim 1, wherein

in the water repellent treatment, any one of the group consisting of a fluorine-based water repellent agent, a silicone-based water repellent agent, and a hydrocarbon-based water repellent agent is used.

5. The cloth according to claim 4, wherein

the fluorine-based water repellent agent is a fluorine-based water repellent agent having a total concentration of perfluorooctanoic acid and perfluorooctanesulfonic acid of 5 ng/g or less.

6. The cloth according to claim 1, wherein

a total fineness of the flat cross-section yarn is within a range of 33 dtex to 167 dtex.

7. The cloth according to claim 1, wherein

the number of filaments of the flat cross-section yarn is within a range of 12 to 84.

8. The cloth according to claim 1, wherein

the flat cross-section yarn is made of a polyester.

9. The cloth according to claim 1, wherein

a false twisted and crimped textured yarn is contained in a surface other than a back surface of the cloth.

10. The cloth according to claim 1, wherein

the cloth is a knitted fabric.

11. The cloth according to claim 1, wherein

the cloth is a double knit.

12. The cloth according to claim 1, wherein

the cloth is a weft knitted fabric, and
on a back surface of the weft knitted fabric, a loop occupancy rate of the flat cross-section yarn is within a range of 40% to 90%.

13. The cloth according to claim 1, wherein

a contact cool feeling Q-max on a back surface of the cloth is 0.2 J/cm2·sec or more.

14. The cloth according to claim 1, wherein

a weight per unit of the cloth is 50 g/m2 to 200 g/m2.

15. The cloth according to claim 1, wherein

water absorbency on a back surface of the cloth is 30 seconds or less as measured by a drop method according to JIS L1907-2010 7.1.1.

16. The cloth according to claim 1, wherein

a wet friction force on a back surface of the cloth is 150 g or less.

17. A fiber product comprising the cloth according to claim 1, which is selected from the group of sportswear, outdoor wear, a rain coat, men clothing, woman clothing, work clothing, protective clothing, artificial leather, footwear, a bag, a curtain, a tent, a sleeping bag, a waterproof sheet, and a car sheet.

Patent History
Publication number: 20260201613
Type: Application
Filed: Nov 17, 2023
Publication Date: Jul 16, 2026
Applicant: Teijin Frontier Co., Ltd. (Osaka-shi Osaka)
Inventors: Risa SHINOBU (Osaka), Nobuaki OGATA (Osaka)
Application Number: 19/137,479
Classifications
International Classification: D04B 1/16 (20060101); D02G 3/22 (20060101);