JP7130193B2 - Fabric and clothing using it - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fabric comprising a surface layer and a back layer and clothing using the same, and more specifically to a fabric in which the back layer, which is a skin contact surface, is made of yarn containing polypropylene fiber and clothing using the same. .

Polypropylene-based fibers are lightweight and heat-retaining fibers, and are widely used in clothing, industrial materials, and the like. For example, Patent Literature 1 describes a knitted fabric whose skin side contains polypropylene multifilaments.

Japanese Patent No. 4526074

In Patent Document 1, water is easily removed from the side of the skin, but there is a demand for further improvement in water absorption and quick drying properties.

In order to solve the above conventional problems, the present invention provides a fabric having good water absorption and quick drying properties, especially after washing, and clothing using the same.

The present invention is a fabric comprising a surface layer and a back layer, wherein the surface layer has a moisture content of 0.5% by mass or more and less than 5.0% by mass measured according to JIS L 1015 (2010). It is composed of a yarn containing at least one fiber selected from the group consisting of hydrophobic fibers and hydrophilic fibers having a moisture content of 5.0% by mass or more as measured according to JIS L 1015 (2010), The back layer is composed of threads containing polypropylene fibers having a moisture content of 0.15% by mass or more as measured according to JIS L 1015 (2010), and the back layer is a skin contact surface. It relates to a fabric characterized by

The present invention also relates to clothing characterized by using the fabric described above.

The present invention provides a fabric having good water absorption and quick drying properties and good water absorption and quick drying properties after washing, and clothes using the same.

FIG. 1 is a schematic illustration of an extruder used in one embodiment of the present invention. FIG. 2 is a partial perspective view of an example ring spinning machine used in one embodiment of the present invention. 3 is a knitting structure diagram used in Example 1. FIG.

The inventors of the present invention have earnestly studied how to improve the water absorption and quick-drying properties of fabrics using yarns containing polypropylene fibers. As a result, in the fabric containing the surface layer and the back layer, the hydrophobic fiber and the JIS A back surface that is made of yarn containing at least one fiber selected from the group consisting of hydrophilic fibers having a moisture content of 5.0% by mass or more as measured according to L 1015 (2010), and serving as a skin contact surface. By configuring the layer with yarn containing polypropylene fiber having a moisture content of 0.15% by mass or more measured according to JIS L 1015 (2010), the fabric absorbs water quickly and dries quickly, and after washing. was found to improve. Hereinafter, unless otherwise specified, the moisture content means a value measured according to JIS L 1015 (2010).

Examples of the hydrophobic fibers include fibers having a moisture content of less than 5% by mass, such as polyester fibers, polyolefin fibers, polyamide fibers, acrylic fibers, and vinyl chloride fibers. The polyester fiber is composed of one or more polyester resins selected from, for example, polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene naphthalate, polylactic acid, polybutylene succinate, and copolymers thereof. can be used. As polyolefin fibers, for example, fibers composed of one or more polyolefin resins selected from polypropylene, polyethylene, polybutene-1 and ethylene-propylene copolymer can be used. As the polyamide fiber, for example, a fiber composed of a polyamide resin such as nylon 6 or nylon 66 can be used.

When the water content is less than 0.5% by mass, the hydrophobic fibers are hydrophilicized so that the water content is 0.5% by mass or more. Hydrophilization includes, for example, hydrophilization treatments such as corona discharge treatment, sulfonation treatment, graft polymerization treatment, kneading of a hydrophilizing agent into fibers, and application and adhesion of a hydrophilizing agent and/or a water absorbing agent. , by exhaustion and the like. For example, as a hydrophilization treatment for polyester fibers, a water-absorbing agent for polyester is used in the dyeing process in the same bath. Hereinafter, "hydrophilized hydrophobic fibers" means hydrophobic fibers having a moisture content of 0.5% by mass or more and less than 5.0% by mass, unless otherwise specified.

Examples of the water-absorbing agent for polyester include: a compound in which side chains of polyethylene glycol are bonded to polyester; a copolymer polyester resin composed of dimethyl terephthalate, dimethyl isophthalate and polyethylene glycol; a copolymer polyester resin composed of dimethyl terephthalate and polyethylene glycol a copolymer polyester resin composed of terephthalic acid, adipic acid, 5-sulfoisophthalic acid and polyethylene glycol; and a block copolymer polyester resin composed of terephthalic acid and/or isophthalic acid and alkylene glycol and polyalkylene glycol. Among water-absorbing agents for polyester, commercially available products include, for example, Nicepol PR-99 (manufactured by Nicca Chemical Co., Ltd.), Nicepol PRK-60 (manufactured by Nicca Chemical Co., Ltd.), Nicepol PR-86E (Nicca Chemical Co., Ltd.) Co.), SR1805M (manufactured by Takamatsu Yushi Co., Ltd.), Meicafinish SRM-65 (manufactured by Meisei Chemical Co., Ltd.), and the like. Examples of the water-absorbing agent for nylon include Nicepol PRN (manufactured by Nicca Chemical Co., Ltd.).

The hydrophilic fibers may be used singly or in combination of two or more.

The degree of hydrophilization of the hydrophilized hydrophobic fibers can be specified by the difference between the moisture content of the hydrophobic fibers after the hydrophilization treatment and the official moisture content of the hydrophobic fibers. The lower limit of the degree of hydrophilicity is preferably 0.1% by mass or more in order to obtain a predetermined liquid absorbing power. More preferably, it is 0.2% by mass or more. Although the upper limit of the degree of hydrophilicity is not particularly limited, it is preferably 1.0% by mass or less because the diffusibility of the surface layer does not change even if it exceeds 1.0% by mass.

The hydrophilic fibers include fibers having a moisture content of 5% by mass or more, such as natural fibers such as pulp, cotton, hemp, silk and wool, regenerated cellulose fibers such as viscose rayon, cupra and solvent-spun cellulose fibers, and Synthetic fibers and the like having hydrophilicity can be mentioned. The hydrophilic fiber is more preferably a scouring-bleached cellulose fiber from the viewpoint of easy absorption and diffusion of water.

The yarn constituting the surface layer may be spun yarn, multifilament, or monofilament, but multifilament is preferred from the viewpoint of soft texture. In the yarns constituting the surface layer, the hydrophobic fibers and/or the hydrophobic fibers preferably have a single fiber fineness of 0.4 to 20 dtex, more preferably 0.5 to 3.5 dtex. 0.6 to 2.5 dtex is more preferred.

From the viewpoint of facilitating the diffusion of moisture, the surface layer is preferably composed of threads containing hydrophilic fibers. The yarn constituting the surface layer preferably contains 30% by mass or more, more preferably 50% by mass or more, of at least one fiber selected from the group consisting of hydrophilized hydrophobic fibers and hydrophilic fibers. It preferably contains 70% by mass or more. For example, when it is intended to obtain a dry feeling as the feel of the surface layer, polyester fibers are preferably used as the hydrophilized hydrophobic fibers from the viewpoint of versatility. The yarn constituting the surface layer preferably contains 30% by mass or more of polyester fiber, more preferably 70% by mass or more of polyester fiber.

The thread forming the back layer contains polypropylene fiber (hereinafter referred to as polypropylene fiber a) having a moisture content of 0.15% by mass or more. By imparting hydrophilicity to polypropylene fibers, which are hydrophobic fibers, and forming a back layer that becomes a skin contact surface with threads containing the polypropylene fibers to which hydrophilicity has been imparted, the lightness and It is possible to improve the water absorption and quick drying properties of the fabric, especially the water absorption and quick drying properties after washing, while maintaining heat retention.

From the viewpoint of lightness, heat retention, and water absorption and quick drying, the yarn constituting the back layer preferably contains 30% by mass or more, more preferably 50% by mass or more, and 70% by mass or more of polypropylene fiber a. More preferably, it contains The thread forming the back layer may be composed only of the polypropylene-based fiber a, or may contain other fibers. Other fibers are not particularly limited, but the hydrophobic fibers and hydrophilic fibers described above can be used. Other fibers may be included in an amount of 70% by mass or less depending on the application, purpose, and the like. The yarn constituting the back layer may contain 30% by mass or more of the polypropylene-based fiber a and 70% by mass or less of the polypropylene-based fiber other than the polypropylene-based fiber a. From the viewpoint of lightness and heat retention, the yarn constituting the back layer preferably contains 30% by mass or more, more preferably 50% by mass or more, of polypropylene fibers a and other polypropylene fibers in total.

The yarn constituting the back layer may be spun yarn, multifilament, or monofilament, but spun yarn is preferable from the viewpoint of heat retention and soft texture. The spun yarn can be produced by any method such as a ring method, an open-end method, a binding method, an alternate twisting method, a wrapping method, a vortex method (MVS method) and a non-twisting method. Moreover, in the ring method, compact spinning may be performed by introducing a compact spinning system into the ring spinning machine. Also, a single yarn may be used, a silo yarn may be used, or a plurality of yarns may be twisted together.

When the yarn constituting the back layer is a spun yarn, it can be produced, for example, by performing spinning in the following steps in a ring method. A roving a containing at least one polypropylene-based fiber a is prepared in advance, and two rovings containing at least one roving a are supplied to the draft zone and drafted, and then supplied to the twisting zone while being aligned. Then, the two roving yarns immediately after being supplied to the yarn twisting zone are sucked with air in the traveling direction of the roving yarns to converge the fibers and then twisted to obtain a spun yarn. The spinning method is a method that uses both silo spinning and compact spinning, and is also called silo compact spinning, and the spun yarn obtained by this spinning method is also called silo compact yarn or compact silo yarn. . In silo compact spinning, the twist factor may be 2.4-6.0, preferably 2.8-4.5, more preferably 3-4.

When the yarn constituting the back layer is a spun yarn, the count of the spun yarn is not particularly limited. is 15-85S, more preferably 20-80S. The polypropylene fiber a and/or other fibers constituting the spun yarn preferably have a single fiber fineness of 0.4 to 20 dtex, more preferably 0.5 to 3.5 dtex, and more preferably 0.6 More preferably ~2.5 dtex. The fiber length of the polypropylene-based fiber a and/or other fibers constituting the spun yarn is preferably 24 to 75 mm.

The polypropylene fiber a preferably has a moisture content of 0.2% by mass or more, more preferably 0.25% by mass or more. Although not particularly limited, the polypropylene fiber a preferably has a moisture content of 1.0% by mass or less, more preferably 0.4% by mass or less.

The polypropylene fiber a is not particularly limited as long as it has a moisture content of 0.15% by mass or more. Treatment, incorporation (kneading) of a hydrophilic component into fibers, and imparting of a hydrophilic component by coating, adhesion, exhaustion, or the like can be mentioned. Considering the durability of hydrophilization, it is preferable to use polypropylene fibers which are hydrophilized by containing a hydrophilic component and have a moisture content of 0.15% by mass or more. The polypropylene fiber a preferably contains 0.025 to 0.25 parts by mass, more preferably 0.05 to 0.1 parts by mass of the hydrophilic component with respect to 100 parts by mass of the polypropylene component.

In the polypropylene-based fiber a, the polypropylene may be a propylene homopolymer or a copolymer containing a component copolymerizable with propylene in which the propylene content exceeds 50 mol %. The component copolymerizable with propylene is not particularly limited, but examples thereof include olefinic monomers such as ethylene, butene, and methylpentene. One type of polypropylene may be used alone, or two or more types may be used in combination. From the viewpoint of spinnability, the polypropylene preferably has a melt mass flow rate (MFR) of 5 to 60 g/10 min.

The hydrophilic component is not particularly limited as long as it is water-soluble or water-dispersible. Examples of the water-soluble hydrophilic component include ionic surfactants and nonionic surfactants, and nonionic surfactants are preferred. Examples of ester-type nonionic surfactants include glycerin fatty acid esters, sorbitan fatty acid esters, and sucrose fatty acid esters. Examples of ether-type nonionic surfactants include polyoxyethylene (POE) alkyl ethers, polyoxyethylene ( POE) alkylphenyl ether, polyoxyethylene polyoxypropylene glycol and the like. Among these, polyoxyethylene alkyl ethers or polyoxyalkylene derivatives (both of which are manufactured by Kao Corporation, trade name "EMULGEN") are preferable.

The water-soluble hydrophilic component preferably has a molecular weight of 200-5000, more preferably 300-3000. When a hydrophilic surfactant is used alone as the water-soluble hydrophilic component, the hydrophilic surfactant preferably has a molecular weight of 1,000 or less.

Water-dispersible hydrophilic components include, for example, clay minerals such as kaolinite, smectite, montmorillonite and bentonite; hydrophilic silicas such as fumed silica, colloidal silica and silica gel; multilayer structures such as talc and zeolite; Particles, natural polymer polysaccharides such as cellulose, and amino-based polymer polysaccharides such as chitin and chitosan are used. Polymeric polysaccharides are preferably added as nanofibers. Clay minerals, nanofibers, and the like are added as solids, so they are also effective as water retention agents. The average particle size of the inorganic particles is preferably as small as possible, preferably 100 nm or less. In addition, the average particle size should be measured with a phase-drap method particle size measuring device.

The polypropylene-based fiber a can be obtained by melt-spinning a polypropylene-based resin composition containing polypropylene and a masterbatch resin composition containing a hydrophilic component. The polypropylene-based resin composition preferably contains 1 to 10 parts by mass of the masterbatch resin composition per 100 parts by mass of polypropylene.

The masterbatch resin composition contains polypropylene as a heat-meltable base resin and a hydrophilic component. The masterbatch resin composition preferably contains 1 to 10% by mass of the hydrophilic component, more preferably 2 to 8% by mass of the hydrophilic component. The polypropylene as the base resin may be the same as or different from the polypropylene constituting the polypropylene-based fiber B.

The masterbatch resin composition preferably further contains a compatibilizer. As the compatibilizer, for example, ethylene-based copolymers containing a polar group (acid anhydride group) such as ethylene-acrylic acid ester copolymer and ethylene-acrylic acid-maleic acid copolymer are preferred. Ethylene-based copolymers containing polar groups are preferred because the presence of the polar groups increases the affinity with the hydrophilic component, and since they have a relatively lower melting point than polypropylene, they are easy to knead. The melting point (DSC method) of the compatibilizing agent is preferably 70 to 110°C. A more preferred melting point is 80-105°C.

The masterbatch resin composition may further contain a high MFR polypropylene having a higher MFR than the polypropylene of the base resin, and the MFR of the high MFR polypropylene is preferably 10 times or more higher than the MFR of the base resin. For example, the MFR in high MFR polypropylene is preferably 100-3000 g/10 min, more preferably 500-2500 g/10 min. High MFR polypropylene may be used alone or in combination of two or more.

The method for producing the masterbatch resin composition includes a primary processing step of melt-kneading a base resin polypropylene and a hydrophilic component, cooling and chipping, and melting a high MFR polypropylene into the chipped resin composition. A secondary processing step of kneading, cooling and chipping is preferably included. In addition, a "chip" may be called a "pellet."

In the primary processing step, first, an extruder is used, the extruding part is continuously connected to a kneading chamber equipped with a vacuum line, and a hydrophilic component (liquid) or, if necessary, water or the like is added to the kneading chamber. By supplying a hydrophilic component dissolved or dispersed in a solvent of and polypropylene as a base resin, removing the solvent in a gaseous state from the decompression line at the same time as mixing, and then extruding the resin composition from the extrusion unit , a resin composition is obtained. Furthermore, it is preferable to add a compatibilizing agent because the mixing of the base resin and the hydrophilic component becomes efficient. In the secondary processing step, it is preferable to add a water retention agent as a solid hydrophilic component among the hydrophilic components in some cases.

Specifically, the polypropylene-based fiber a can be produced as follows.
(1) Base resin polypropylene: hydrophilic component (polyoxyethylene alkyl ether): compatibilizer = 100: 2-8: 2-8 (parts by mass) for primary processing (primary processing resin).
(2) As secondary processing, primary processing resin: high MFR polypropylene = 100: 5 to 15 (mass parts) to obtain a masterbatch resin composition (secondary processing resin).
(3) About 1 to 10 parts by mass of the masterbatch resin composition (secondary processed resin) is mixed with 100 parts by mass of polypropylene to melt-spun the obtained polypropylene resin composition.

Polypropylene-based fiber a can be produced by a conventional method. A predetermined amount of the polypropylene resin and the masterbatch resin composition are mixed from a spinneret, melt spun to form an undrawn yarn, the obtained undrawn yarn is drawn, a fiber treatment agent (oil agent) is applied, and a crimper is used. It can be obtained by crimping and drying.

The polypropylene-based fiber a may be a single component of polypropylene-based resin, or a composite component of polypropylene-based resins or other resins. When the polypropylene-based fiber a is to be colored, it is preferable to mix a pigment with the polypropylene-based resin, or to form a core-sheath-type composite with a component that is easily dyed with a dye.

The fiber cross-sectional shape of the polypropylene-based fiber a is not particularly limited, and may be circular or non-circular (so-called modified cross section).

The fiber treatment agent is preferably a hydrophilic oil agent. By applying a hydrophilic oil agent, static electricity tends to be suppressed and productivity in the spinning process tends to be improved.

The fiber length of the polypropylene fiber a is not particularly limited, but is preferably 24 to 75 mm, more preferably 28 to 65 mm, particularly preferably 32 to 54 mm, most preferably 34 to 48 mm.

The fabric may be a knitted fabric having a multi-layered structure of two or more layers, or a woven fabric having a multi-layered structure of two or more layers. In the case of knitted fabrics, it may be single-sided knitting, plated cotton sheeting knitting or pique knitting that is modified knitting so that the front and back are made of different materials, smooth knitting in double-sided knitting, corrugated knitting, multi-impulse double-sided which is a changed structure of double-sided knitting. One-sided honeycomb knitting of knitting etc. are mentioned. In the case of woven fabrics, satin weaves, 3/1 twill weaves, and the like are exemplified for double weaves and single weaves. In particular, it is preferably a knitted fabric having a two-layer structure consisting of a double-sided honeycomb structure. At this time, the honeycomb surface preferably constitutes the back layer.

In the fabric, the yarn containing the polypropylene fiber a constituting the back layer is woven or knitted with the yarn constituting the surface layer, and the yarn constituting the back layer extends at least partially toward the surface layer preferably exposed. Moisture is quickly transferred from the back layer, which is the surface that contacts the skin, to the surface layer, and the water absorption and quick drying properties are enhanced.

The fabric may be dyed after the refining process, and may be subjected to water absorption, SR (Soil release), antibacterial, antistatic, etc. in finishing.

The fabric can be produced, for example, by the following method.
<Fabric manufacturing method 1>
A step of preparing a yarn (also referred to as yarn A1) containing hydrophobic fibers;
A step of preparing a yarn (also referred to as yarn B1) containing polypropylene fibers having a moisture content of 0.15% by mass or more as measured according to JIS L 1015 (2010);
A step of weaving or knitting so that the yarn A1 constitutes the surface layer and the yarn B1 constitutes the back layer to produce a fabric;
In addition to at least one process selected from the group consisting of a scouring process and a dyeing process, a water-absorbing process is applied, and the hydrophobic fiber constituting the surface layer has a moisture content of 0.5 measured according to JIS L 1015 (2010). It includes a step of processing so as to be at least mass %.

<Fabric manufacturing method 2>
A step of preparing a yarn containing hydrophilic fibers (also referred to as yarn A2);
A step of preparing a yarn (also referred to as yarn B2) containing polypropylene fibers having a moisture content of 0.15% by mass or more as measured according to JIS L 1015 (2010);
A step of weaving or knitting so that the yarn A2 constitutes the surface layer and the yarn B2 constitutes the back layer to produce a fabric;
It includes at least one process selected from the group consisting of a scouring process, a bleaching process (only natural cellulose fibers such as cotton and hemp), a dyeing process, and a finishing process (softening process).

From the viewpoint of high water absorption and quick drying properties, the fabric preferably has a transpiration rate of 30% or more in a transpiration (II) test (based on Boken standard BQE A 028) 20 minutes after the start of the test. The transpiration (II) test is a test for comprehensively evaluating both water absorption and quick-drying properties, and the transpiration rate is measured by the following method.
(1) Measure the mass (W) of a test piece with a diameter of about 9 cm and a petri dish.
(2) Add 0.1 mL of water dropwise to the petri dish, place the test piece on top, and measure the mass (W0).
(3) Leave it under standard conditions (20°C, 65% RH), measure the mass (Wt) at predetermined time intervals, and calculate the transpiration rate (%) after 20 minutes.
Transpiration rate (%) = [(W0-Wt)/(W0-W)] x 100

Alternatively, from the viewpoint of high water absorption and quick drying, the fabric has a drying time (time to transpiration rate of 100%) measured according to ISO 17617 (2014) Determination of moisture drying rate (Method B-Horizontal drying) of 45 minutes. The following are preferable.
ISO 17617 uses the same measurement method as the transpiration (II) test, and obtains a regression line of the transpiration rate with respect to the most recent time from immediately after dropping until the transpiration rate reaches 90%.
y = ax + b [y: transpiration rate (%), a: slope, x: time, b: intercept]
Calculate the drying time (the time required for the transpiration rate to reach 100%) from the values obtained from the regression line.
Drying rate (%/min) = a
Drying time (100%) = (100-b)/a

From the viewpoint of high water absorption and quick drying after washing, the fabric has a transpiration rate of 20% or more in the transpiration (I) test (based on Boken standard BQE A 006) 30 minutes after the start of the test after 10 washes. is preferred. The transpiration (II) test is a test for comprehensively evaluating both water absorption and quick-drying properties, and the transpiration rate is measured by the following method.
(1) Measure the mass (W) of a test piece with a diameter of about 9 cm and a watch glass.
(2) Drop 1 mL of water onto the watch glass, place the test piece on it, and measure the mass (W0).
(3) Leave it under standard conditions (20°C, 65% RH), measure the mass (Wt) at predetermined time intervals, and calculate the transpiration rate (%) at each time interval.
Transpiration rate (%) = [(W0-Wt)/(W0-W)] x 100

Although the fabric is not particularly limited, it preferably has a basis weight of 200 g/m ² or less, more preferably 50 to 200 g/m ² from the viewpoint of wearability such as lightness. The fabric is not particularly limited, but preferably has a thickness of 1.1 mm or less, more preferably 0.3 to 1.0 mm.

The fabric may be used for clothing. Examples of clothing include underwear, undergarments, shirts, jumpers, sweaters, pants, training wear, tights, bellybands, mufflers, hats, gloves, socks, and earmuffs.

Hereinafter, it demonstrates using drawing. FIG. 1 is a schematic illustration of an extruder used in one embodiment of the present invention. This extruder 1 is composed of a raw material supply port 2 , a resin melting section 3 , a kneading and dispersing section 4 , a pressure reducing line 5 , an extrusion section 6 and a take-out section 7 . First, a polymer (heat-meltable base resin) and a hydrophilic component (liquid) or, if necessary, a hydrophilic component dissolved in water are supplied from the raw material supply port 2 of the resin melting section 3 . Both may be mixed before supply. Next, it is sent to the kneading and dispersing section 4, where a plurality of kneading plates are rotating, where the polymer and the hydrophilic component dissolved in water are uniformly mixed. Moisture is then removed in the form of water vapor from the vacuum line 5 . Next, the resin composition is extruded from the extruding part 6, cooled, taken out from the take-out part 7, and cut after cooling to form a pellet-shaped resin composition (primary processing resin).

FIG. 2 is a partial perspective view of an example ring spinning machine used in one embodiment of the present invention.

Two roving yarns 11a and 11b are supplied in parallel to a draft zone consisting of a back roller 103, a middle roller 104, an apron 105 and a front roller 106 via a guide bar 101 and a trumpet 102, and drafted in parallel. Feed the twisting zone. Two drafted rovings (fiber bundles) 12a and 12b immediately after being supplied to the twisting zone are subjected to an air blowing process using a bundling device consisting of an air suction unit 107, an aeration apron 108, a rotating roller 109 and an auxiliary roller 110. After the fibers are converged by sucking them in the traveling direction of the roving yarn, the spun yarn (silo compact yarn) 20 is obtained by twisting the yarn via the snail wire 111, the traveler 112 and the ring 113.

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples. The invention is not limited to the following examples.

(Measuring method)
(1) Melt mass flow rate (MFR)
Measured at 230° C. under a load of 2.16 kg according to ISO1133.
(2) Moisture content Measured under standard conditions of temperature 20°C and relative humidity 65% according to JIS L 1015 (2010).
(3) British cotton count Measured according to the cotton count measurement method of JIS L 1095 (2010) 9.4.1 Normal tex/count measurement of general spun yarn.
(4) Twist factor The number of twists was measured according to JIS L 1095 (2010) 9.15.1 A method, and the twist factor was calculated using the following formula.
Twist factor = number of twists per inch of yarn length/√ count (5) basis weight and thickness Measured according to JIS L 1096 (2010).
(6) Water absorption and quick drying evaluation 1
The transpiration rate after 20 minutes was determined according to the transpiration (II) test (Boken standard BQE A 028) of the Boken Quality Evaluation Organization. Boken general product standard is 30% or more.
(7) Water absorption and quick drying evaluation 2
The transpiration rate after 30 minutes was determined according to the transpiration (I) test (Boken standard BQE A 006) of the Boken Quality Evaluation Organization. The general product standard is 20% or more.
(8) Water absorption and quick drying evaluation 3
Using MMT (Moisture Management Tester), a water absorption and quick drying test was performed according to AATCC TM 195 (American Textile Chemistry and Dyeing Technology Association Standard) or GB/T21655.2 (Chinese Standard). Specifically, the sample (9 cm × 9 cm) is set in the device, and the test water (about 0.2 mL) is dropped over 20 seconds on the immersed surface (skin side, back layer) of the sample, and the diffusion and penetration of this moisture. A sensor inside the device recorded the state of the device for each elapsed time, and the state was completed in 120 seconds. Based on the automatically calculated measurement items below, GB/T21655.2 (Chinese Standard) listed in Table 1 below is evaluated on a scale of 1 to 5, or AATCC TM 195 (US textiles) listed in Table 2 below. Evaluation was made on a scale of 1 to 5 according to the Standards of the Association of Chemical Technology and Dyeing Techniques).
(9) Washing method It was carried out according to JIS L 0217 103 method.

<Production Example 1 of Masterbatch Resin Composition>
[Primary processing resin]
(1) As a water-soluble hydrophilic component, a polyoxyalkylene ether (manufactured by Kao Corporation, Emulgen 1108, active ingredient: 100% by mass, molecular weight: 473) was prepared.
(2) As a base resin, polypropylene (MFR 20 g/10 min) pellets (cylindrical with a diameter of 2 mm and a height of 2 mm) were prepared.
(3) 80 parts by mass of base resin pellets, 12.5 parts by mass of polypropylene containing 4% by mass of polyoxyalkylene ether (MFR 800 g/10 min), hydrophilic component 2. 5 parts by mass and 5 parts by mass of a compatibilizing agent (ethylene-acrylic acid-maleic acid copolymer (MFR 80 g/10 min (190° C., 2.16 kg), melting point (DSC method) 98° C.)) were supplied.
(4) The processing temperature in the extruder was set to 170-190°C. In the resin melting section 3, the feed is forwarded along the rotating shaft, and in the kneading and dispersing section 4, a plurality of kneading plates are rotating. was vacuumed (negative pressure) to remove water at the same time.
(5) Next, the resin composition was extruded from the extruder 6, cooled, and taken out from the outlet 7.
(6) It was led to a pelletizer and pelletized (primary processed resin). (Primary processing process)
[Secondary processing resin]
(1) Using the extruder, 100 parts by mass of the pelletized resin composition (primary processing resin) obtained in the primary process is added to 100 parts by mass of a low stereoregular polypropylene (trade name " 10 parts by mass of L-Modu" S400 (manufactured by Idemitsu Kosan Co., Ltd.) was mixed and supplied from the raw material supply port 202 .
(2) The mixture was melt-kneaded, cooled, and pelletized with a pelletizer to obtain a cylindrical polypropylene-based masterbatch resin composition (secondary processed resin) having a diameter of 2 mm and a height of 2 mm.

<Fabrication example 1>
(1) 100 parts by mass of polypropylene (MFR 20 g / 10 min) pellets (cylindrical shape with a diameter of 2 mm and a height of 2 mm), 2 parts by mass of the masterbatch resin composition obtained in Production Example 1, and 2 parts by mass of carbon black were mixed.
(2) The mixed resin composition (pellet) of (1) is supplied from the raw material supply port of the extruder for melt spinning, melt-kneaded by the extruder using a conventional melt spinning machine, and then melt spinning. did. After that, it is drawn using a known drawing machine, applied with a hydrophilic fiber treatment agent so that the adhesion amount is 0.15% by mass, and cut to obtain a single fiber fineness of about 1.8 dtex and a fiber length of 38 mm. A polypropylene fiber (hereinafter also referred to as a hydrophilic PP fiber (black)) was produced. The obtained hydrophilized PP fiber (black) had a moisture content of 0.3% by mass.

<Fabrication example 2 of fiber>
Polypropylene (MFR 20 g / 10 min) pellets (cylindrical shape with a diameter of 2 mm and a height of 2 mm) are supplied from the raw material supply port of an extruder for melt spinning, and melt-kneaded with an extruder using a conventional melt spinning machine. After that, it was melt-spun. After that, it is drawn using a known drawing machine, applied with a hydrophilic fiber treatment agent so that the adhesion amount is 0.15% by mass, and cut to obtain a single fiber fineness of about 1.3 dtex and a fiber length of 38 mm. A polypropylene fiber (hereinafter also referred to as regular PP fiber) was produced. The obtained regular PP fiber had a moisture content of 0.1% by mass.

<Spun Yarn Production Example 1>
The hydrophilized PP fibers (black) obtained in Production Example 1 were successively introduced into the cotton blending process, the carding process, the drawing process and the roving process to obtain a roving of 50 gelen/12 yd. Next, using two rovings made of 100% by mass of the obtained hydrophilized PP fiber (black), a ring spinning machine equipped with a compact spinning system was used to apply a draft of 40 times, and the rovings were made with air. After the fibers were converged by suction in the traveling direction, they were twisted at a twist coefficient of 3.6 to produce a spun yarn (silo compact yarn) with a British cotton count of 40s. Specifically, as shown in FIG. 2, two rovings 11a and 11b made of 100% by mass regular PP fibers (black) are passed through a guide bar 101 and a trumpet 102 to a back roller 103 and a middle roller 104. , an apron 105 and a front roller 106, and supplied to the twisting zone while being drafted in parallel, and two drafted rovings (fiber bundles) 12a immediately after being supplied to the twisting zone , 12b are sucked in the traveling direction of the roving by air using a bundling device consisting of an air suction unit 107, a ventilation apron 108, a rotating roller 109, and an auxiliary roller 110, and then the snail wire 111, A spun yarn (silo compact yarn) 20 was obtained by twisting the yarn through a traveler 112 and a ring 113 .

<Spun Yarn Production Example 2>
The hydrophilized PP fibers (black) obtained in Production Example 1 were successively introduced into the cotton blending process, the carding process, the drawing process and the roving process to obtain a 100 gelen/12 yd roving. Next, using one roving made of 100% by mass of the obtained hydrophilized PP fiber (black), a ring spinning machine equipped with a compact spinning system was used to apply a draft of 40 times, and the roving was made with air. After the fibers were converged by suction in the direction of travel, they were twisted at a twist coefficient of 3.6 to produce a spun yarn (compact yarn) with a British cotton count of 40s.

<Spun Yarn Production Example 3>
The regular PP fibers obtained in Production Example 2 were successively introduced into the cotton blending process, the carding process, the drawing process and the roving process to obtain 90 gelen/12 yd roving. Using one roving made of 100% by mass of the obtained regular PP fiber, a 36-fold draft was applied with a ring spinning machine, twisted at a twist coefficient of 3.4, and spun yarn with a British cotton count of 40s ( ring yarn) was produced.

(Example 1)
Polyester multifilament (111 dtex, 144 filaments, single fiber fineness 0.77 dtex) is used as the yarn for the surface layer, and 100% by mass of the hydrophilic PP fiber (black) obtained in Production Example 1 is used as the yarn for the back layer. Using the silocompact yarn of Production Example 1 of spun yarn (hereinafter also referred to as PP silocompact yarn), according to the knitting structure diagram shown in FIG. A double knit (basis weight: 179 g/m ² ) having a honeycomb structure on the back side was knitted. The fiber mixing ratio was 43% by mass of polyester fiber and 57% by mass of polypropylene fiber having a moisture content of 0.3% by mass. After scouring the obtained knitted fabric, a cationic dye and a water-absorbing agent for polyester (manufactured by Nicca Chemical Co., Ltd., trade name Nicepol PR-99) are dyed and water-absorbed in the same bath at 125 ° C. for 40 minutes, followed by water-absorbing finishing. did The water content of the hydrophilized hydrophobic fiber (polyester fiber) was 0.7% by mass, and the degree of hydrophilization (difference between the water content of the hydrophilized hydrophobic fiber and the official water content of the hydrophobic fiber) was 0.7% by mass. It was 3% by mass.

(Example 2)
Polyester multifilament (111 dtex, 144 filaments, single fiber fineness 0.77 dtex) is used as the yarn for the surface layer, and 100% by mass of the hydrophilic PP fiber (black) obtained in Production Example 1 is used as the yarn for the back layer. The same method as in Example 1 except that the compact yarn of Production Example 2 of spun yarn (hereinafter also referred to as PP compact yarn) was used. A double knit (basis weight 154 g/m ² ) was knitted. The fiber mixing ratio was 43% by mass of polyester fiber and 57% by mass of polypropylene fiber having a moisture content of 0.3% by mass. The obtained knitted fabric was processed in the same manner as in Example 1. The water content of the hydrophilized hydrophobic fiber (polyester fiber) was 0.7% by mass, and the degree of hydrophilization (difference between the water content of the hydrophilized hydrophobic fiber and the official water content of the hydrophobic fiber) was 0.7% by mass. It was 3% by mass.

(Comparative example 1)
Double knit in the same manner as in Example 1 except that the ring yarn (hereinafter also referred to as PP ring yarn) made of 100% by mass of the regular PP fibers obtained in Production Example 3 was used as the yarn for the back layer. (basis weight 167 g/m ² ) was knitted. The fiber mixing ratio was 43% by mass of polyester fiber and 57% by mass of polypropylene fiber having a moisture content of 0.1% by mass. The obtained knitted fabric was processed in the same manner as in Example 1. The water content of the hydrophilized hydrophobic fiber (polyester fiber) was 0.7% by mass, and the degree of hydrophilization (difference between the water content of the hydrophilized hydrophobic fiber and the official water content of the hydrophobic fiber) was 0.7% by mass. It was 3% by mass.

(Comparative example 2)
A double knit was obtained in the same manner as in Example 1, except that the obtained knitted fabric was not subjected to water-absorbing processing and water-absorbing finishing. The water content of the hydrophobic fibers (polyester fibers) forming the surface layer was 0.4% by mass, and the degree of hydrophilicity was 0% by mass.

The knitted fabrics of Example 1 and Comparative Examples 1 and 2 were subjected to water absorption and quick drying evaluation 1, and the evaluation results (transpiration rate) are shown in Table 3 below. Table 3 below shows the results of water absorption and quick drying evaluation 2 for the knitted fabrics of Example 1 and Comparative Example 1 at the initial stage and after 10 washes. Table 3 below also shows the basis weight and thickness of the knitted fabric. Table 4 shows the results of water absorption and quick drying evaluation 3 of the knitted fabrics of Examples 1 and 2 and Comparative Examples 1 and 2.

As can be seen from the results in Tables 3 and 4 above, the fabrics of Examples 1 and 2 had high transpiration. In particular, Example 1 was excellent in the transpiration rate in the transpiration (II) test. The reason why Example 1 was superior is considered to be that the water absorption rate of the back layer (skin surface) in the MMT test is high, so that the water is transferred smoothly and the water evaporates from the surface layer. On the other hand, in Comparative Example 1, since the moisture content of the polypropylene fiber was 0.1% by mass, the wettability was remarkably low and the transpiration rate was low. In Comparative Example 2, hydrophilized polypropylene fibers were used, but the desired transpiration property was not obtained because the polyester fibers constituting the surface layer themselves had a low moisture content and did not absorb water. In addition, in the transpiration (I) test, the durability of the fabric of Example 1 in terms of water absorption and quick drying due to washing after initial washing (without washing) and washing 10 times was confirmed. As a result, the transpiration rate was the same for both the initial stage and the 10th wash, so it was confirmed that the material had washing durability.

1 extruder 2 raw material supply port 3 resin melting section 4 kneading and dispersing section 5 decompression line 6 extrusion section 7 extraction section 11a, 11b roving yarns 12a, 12b drafted roving yarn (fiber bundle)
20 Spun Yarn 101 Guide Bar 102 Trumpet 103 Back Roller 104 Middle Roller 105 Apron 106 Front Roller 107 Air Suction Unit 108 Vent Apron 109 Rotating Roller 110 Auxiliary Roller 111 Snail Wire 112 Traveler 113 Ring

Claims (6)

A fabric comprising a surface layer and a back layer,
The surface layer is composed of threads containing hydrophobic fibers having a moisture content of 0.5% by mass or more and less than 5.0% by mass, as measured according to JIS L 1015 (2010),
The back layer is made of yarn containing polypropylene fibers having a moisture content of 0.15% by mass or more as measured according to JIS L 1015 (2010),
The fabric, wherein the back layer is a skin-contacting surface. The yarns comprising the polypropylene fiber constituting the back layer are woven or knitted with the yarns constituting the surface layer, and the yarns constituting the back layer are at least partially exposed toward the surface layer. The fabric of Claim 1. 3. The fabric according to claim 1, wherein the surface layer is composed of yarns containing hydrophobic fibers, and the hydrophobic fibers are polyester fibers. The fabric according to any one of claims 1 to 3, wherein the polypropylene fiber contains 0.025 to 0.25 parts by mass of a hydrophilic component with respect to 100 parts by mass of the polypropylene component. 5. The fabric of Claim 4, wherein the hydrophilic component comprises a nonionic surfactant. A garment characterized by using the fabric according to any one of claims 1 to 5.

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