JP2019157301A - Knitted fabric for clothing and clothing therewith - Google Patents

Abstract

To provide a knitted fabric for clothing with high heat retention, light weight and good laundry drying property, and a clothing using it.SOLUTION: A knitted fabric for clothing is structured with a surface layer, a back side layer and dual-layered thread fastening them. At least the back side layer is structured with yarn containing hydrophilized polypropylene fiber that the moisture content measured by following JIS L 1015(2010) is not less than 0.15 mass%. The dual-layered thread relates to the knitted fabric for clothing containing monofilament that fineness is 10-220 dtex. This invention relates to the clothing using the knitted fabric for the clothing.SELECTED DRAWING: None

Description

  The present invention relates to a knitted fabric for clothing composed of a front surface layer, a back surface layer, and a binding yarn connecting them, and a clothing using the same.

  A knitted fabric composed of a front surface layer, a back surface layer, and a binding yarn connecting them has heat retention properties by including an air layer, and is therefore suitably used for clothing. For example, Patent Document 1 proposes a three-dimensional circular knitted fabric in which two layers of front and back circular knitted fabrics are connected by polytrimethylene terephthalate fiber monofilament yarns. In Patent Document 2, it is knitted into a three-layer structure of an inner layer on the skin side by double-face knitting, an outer layer, and an intermediate layer connecting them, and the official moisture content of the outer layer is the highest, and the intermediate layer and the inner layer become smaller in this order. A knitted fabric made of fiber yarn has been proposed. In Patent Document 3, in the knitted fabric composed of the inner layer on the skin side, the outer layer and the binding yarn connecting these layers, the inner layer is composed of yarn containing polypropylene fibers having a fineness of 0.3 to 3.0 dtex. Knitted fabric has been proposed.

Japanese Patent Application Laid-Open No. 2014-218098 JP 2009-209459 A JP2013-249560A

  Although the knitted fabrics described in Patent Documents 1 to 3 have heat retaining properties, it is required to further improve the heat retaining properties. In addition, since it is used for clothing, it has been demanded to improve lightness and washing drying.

  In order to solve the above-described conventional problems, the present invention provides a knitted fabric for clothing that has high heat retaining properties and is lightweight and has good washing and drying properties, and clothing using the same.

  The present invention is a knitted fabric for clothing composed of a front surface layer, a back surface layer, and a binding yarn connecting them, and at least the back surface layer has a moisture content measured according to JIS L 1015 (2010) of 0. It is comprised by the thread | yarn containing the hydrophilized polypropylene fiber which is 15 mass% or more, The said binding thread | yarn is related with the knitted fabric for clothing characterized by including the monofilament whose fineness is 10-220 dtex.

  The present invention also relates to a garment characterized by using a knitted fabric for garment.

  INDUSTRIAL APPLICABILITY The present invention can provide a knitted fabric for apparel that has high heat retention and good lightness and washing and drying properties, and apparel using the same.

FIG. 1 is a schematic explanatory view of an example 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. FIG. 3A is a partial view of the knitting structure chart used in the first embodiment. FIG. 3B is a partial view of the knitting structure chart used in the first embodiment. FIG. 4A is a partial view of the knitting structure chart used in the second embodiment. FIG. 4B is a partial view of the knitting structure chart used in the second embodiment. FIG. 5 is a knitting structure chart used in Comparative Example 3.

  The inventors of the present invention diligently studied to improve heat retention, light weight, and washing and drying properties in a knitted fabric for clothing composed of a front surface layer, a back surface layer, and a binding yarn connecting them. As a result, at least the back layer is composed of a yarn containing a hydrophilized polypropylene fiber having a moisture content of 0.15% by mass or more measured according to JIS L 1015 (2010), and the binding yarn has a fineness of 10 It has been found that by including a monofilament of ˜220 dtex, heat retention, light weight and washing drying properties are improved. In the following, unless otherwise indicated, the moisture content means a value measured according to JIS L 1015 (2010).

  The yarn constituting the back layer includes a hydrophilized polypropylene fiber (hereinafter also referred to as polypropylene fiber a) having a moisture content of 0.15% by mass or more. By imparting hydrophilicity to the polypropylene fiber that is a hydrophobic fiber, and constituting a back surface layer that becomes a skin contact surface with a yarn containing the polypropylene fiber to which hydrophilicity has been imparted, the lightweight property of the polypropylene fiber and The laundry drying property of the knitted fabric can be improved while utilizing the heat retaining property.

  The yarn constituting the back layer preferably contains 30% by mass or more, more preferably 50% by mass or more, and more preferably 70% by mass or more of polypropylene fiber a from the viewpoints of lightness, heat retention and water absorption. More preferably. The yarn constituting the back layer may be composed only of the polypropylene fiber a, or may be a combination of the polypropylene fiber a and other fibers. Polypropylene fiber a and other fibers may be combined by any method such as blending, blending, blending, drawing, knit.

  The other fibers are not particularly limited, and synthetic fibers, natural fibers, regenerated fibers, and the like can be used as appropriate. Specific examples include polyolefin fibers other than polypropylene fibers a, acrylic fibers, nylon, polyester fibers, nylon fibers, rayon fibers, cupra fibers, acetate fibers, ethylene vinyl alcohol fibers, polyurethane fibers, cotton fibers, hemp fibers, Examples thereof include silk fiber, wool fiber, and cashmere fiber, and a plurality of the fibers may be combined. Especially, it is preferable that it is 1 or more types chosen from the group which consists of polypropylene fiber other than polypropylene fiber a, polyester fiber, acrylic fiber, polyurethane fiber, and wool fiber, Polypropylene fiber other than polypropylene fiber a, polyurethane fiber And at least one selected from the group consisting of polyester fibers. By using polypropylene fibers other than the polypropylene fiber a, lightness and heat retention are improved. By using the polyurethane fiber, the heat retaining property can be further enhanced by imparting stretch properties and reducing the air permeability. By using the polyester fiber, quick drying can be improved. By using acrylic fiber, heat retention and dyeability can be enhanced.

  The yarn constituting the back layer may contain 70% by mass or less of other fibers depending on the purpose and the like. The yarn constituting the back surface layer may contain 30% by mass or more of polypropylene fiber a and 70% by mass or less of polypropylene fiber other than polypropylene fiber a. From the viewpoints of lightness and heat retention, the yarn constituting the back layer preferably contains 30% by mass or more, and more preferably contains 50% by mass or more of the polypropylene fibers a and other polypropylene fibers. Although the thread | yarn which comprises the said back surface layer is not specifically limited, For example, 30-70 mass% of polyester fibers may be included. Moreover, although the thread | yarn which comprises the said back surface layer is not specifically limited, For example, 1-10 mass% of polyurethane fibers may be included.

  The yarn constituting the back layer may be a spun yarn, a multifilament, or a monofilament, but is preferably a spun yarn 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 bundling method, an alternating twist method, a wrapping method, a vortex method (MVS method), and a non-twist method. In the ring method, compact spinning in which a compact spinning system is introduced into a ring spinning machine may be used. Moreover, a single yarn may be used, a silo yarn may be used, and a plurality of twisted yarns may be used.

  When the yarn constituting the back layer is a spun yarn, it can be produced, for example, by performing spinning in the following process in the ring method. A roving yarn a including a single polypropylene fiber a is prepared in advance, the roving yarn a is supplied to the draft zone, drafted, then supplied to the twisting zone, and the roving yarn a just after being supplied to the twisting zone is air Thus, a spun yarn (compact yarn) can be obtained by twisting the fibers after attracting them in the direction of travel of the roving to converge the fibers. Alternatively, a roving yarn a containing at least one polypropylene fiber a is prepared in advance, two roving yarns containing at least one roving yarn a are supplied to the draft zone, drafted, and then twisted while being aligned. The spun yarn can be obtained by twisting the two roving yarns immediately after being supplied to the twisting zone and sucking the air in the direction of the roving to converge the fibers. The spinning method is a method using both silo spinning and compact spinning, and is also referred to as silo compact spinning, and the spun yarn obtained by the spinning method is also referred to as silo compact yarn or compact silo yarn. . The twist coefficient of the spun yarn may be 2.4 to 6.0, preferably 2.8 to 4.5, and more preferably 3 to 4. A compact yarn or silo-compact yarn is preferable because an appropriate inter-fiber gap is obtained and a yarn with less fluff having good heat retention is obtained.

  When the yarn constituting the back layer is a spun yarn, the yarn count of the spun yarn is not particularly limited, but may be in the range of 5 to 100 S in English cotton count, preferably 10 to 90 S, more preferably. Is 15 to 85S, more preferably 20 to 80S. The polypropylene fiber a and / or other fibers constituting the spun yarn are not particularly limited, but the single fiber fineness is more preferably 0.5 to 3.5 dtex, and 0.6 to 2.5 dtex. More preferably. The polypropylene fiber a and / or other fibers constituting the spun yarn are not particularly limited, but the fiber length is preferably 24 to 75 mm, more preferably 28 to 65 mm, and 32 to 54 mm. Particularly preferred is 34 to 48 mm.

  The polypropylene fiber a has a moisture content of 0.15% by mass or more, preferably 0.2% by mass or more, and more preferably 0.25% by mass or more. Moreover, although it does not specifically limit, it is preferable that the moisture content of the polypropylene fiber a is 1.0 mass% or less, More preferably, it is 0.4 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, but as a method for hydrophilization, for example, chemical treatment such as corona discharge treatment, sulfonation treatment, graft polymerization treatment, etc. Examples thereof include treatment, incorporation (kneading) of a hydrophilic component into the fiber, and application of the hydrophilic component, adhesion, exhaustion, and the like. Considering the durability of hydrophilization, it is preferable to use a fiber having a moisture content of 0.15% by mass or more by making the polypropylene fiber hydrophilic by including a hydrophilic component. For example, it is possible to use a fiber that has been made hydrophilic by adding a hydrophilic component to polypropylene fiber, preferably by kneading in a spinning stage, and having a moisture content of 0.15% by mass or more. The polypropylene fiber a preferably contains 0.025 to 0.25 parts by mass of the hydrophilic component, more preferably 0.05 to 0.1 parts by mass with respect to 100 parts by mass of the polypropylene component. In the production of regular polypropylene fibers, a hydrophilic fiber treatment agent (also referred to as a softening agent) is usually applied during the finishing process. It is difficult to make it 0.15 mass% or more.

  In the polypropylene fiber a, the polypropylene may be a propylene homopolymer or a copolymer including a component copolymerizable with propylene having a propylene content exceeding 50 mol%. The component copolymerizable with propylene is not particularly limited, and examples thereof include olefin monomers such as ethylene, butene, and methylpentene. The said polypropylene may be used individually by 1 type, and may be used in combination of 2 or more type. The polypropylene preferably has a melt mass flow rate (MFR) of 5 to 60 g / 10 min from the viewpoint of spinnability.

  The hydrophilic component is not particularly limited as long as it has water solubility or water dispersibility. Examples of the water-soluble hydrophilic component include ionic surfactants and nonionic surfactants, among which nonionic surfactants are preferable. Examples of the ester type nonionic surfactant include glycerin fatty acid ester, sorbitan fatty acid ester, and sucrose fatty acid ester. Examples of the ether type nonionic surfactant include polyoxyethylene (POE) alkyl ether, polyoxyethylene ( POE) alkylphenyl ether, polyoxyethylene polyoxypropylene glycol and the like. Among these, polyoxyethylene alkyl ethers or polyoxyalkylene derivatives (both compounds, for example, trade name “Emulgen” manufactured by Kao Corporation) are preferable.

  The water-soluble hydrophilic component preferably has a molecular weight of 200 to 5,000, more preferably 300 to 3,000. When a hydrophilic surfactant is used alone as the water-soluble hydrophilic component, the molecular weight of the hydrophilic surfactant is preferably 1000 or less.

  Water-dispersible hydrophilic components include, for example, clay minerals such as kaolinite, smectite, montmorillonite, bentonite, etc., hydrophilic silica such as fumed silica, colloidal silica, silica gel, multilayer structure such as talc, zeolite, or amorphous inorganic Particles, natural polymer polysaccharides such as cellulose, and amino polymer polysaccharides such as chitin and chitosan are used. The polymeric polysaccharide may be added as nanofibers. Since clay minerals and nanofibers are added in solid form, they also have an effect as a water retention agent. The average particle diameter of the inorganic particles is preferably as fine as possible, and is preferably 100 nm or less. In addition, an average particle diameter shall be measured with the phase-drap method particle diameter measuring apparatus.

  The polypropylene fiber a can be produced by a conventional method. For example, a polypropylene resin composition containing polypropylene and a masterbatch resin composition containing a hydrophilic component is melt-spun using a spinneret to form an undrawn yarn, and the resulting undrawn yarn is drawn and treated with fibers. It can be obtained by applying an agent, applying crimp with a crimper, and drying.

  It is preferable that the said polypropylene resin composition contains 1-10 mass parts of master batch resin compositions with respect to 100 mass parts of polypropylene as a base resin. The master batch 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 master batch resin composition preferably further contains a compatibilizer. As the compatibilizing agent, for example, an ethylene-based copolymer containing a polar group (an acid anhydride group) such as an ethylene-acrylic acid ester copolymer and an ethylene-acrylic acid-maleic acid copolymer is preferable. The ethylene-based copolymer containing a polar group is preferable because of having a polar group, the affinity with a hydrophilic component is high, and the melting point is relatively lower than that of polypropylene, which makes it easy to knead. The melting point (DSC method) of the compatibilizer is preferably 70 to 110 ° C. A more preferable melting point is 80 to 105 ° C.

  The masterbatch resin composition may further include 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 the high MFR polypropylene is preferably 100 to 3000 g / 10 minutes, and more preferably 500 to 2500 g / 10 minutes. A high MFR polypropylene may be used individually by 1 type, and may be used in combination of 2 or more type.

  The masterbatch resin composition manufacturing method includes a base resin polypropylene, a primary processing step in which a hydrophilic component is melt-kneaded and cooled to form a chip, and a high MFR polypropylene is melted into the chipped resin composition. It is preferable to include a secondary processing step of kneading and cooling to form chips. The “chip” may be referred to as “pellet”.

  In the primary processing step, first, an extruder is used, and an extrusion portion is continuously connected to a kneading chamber equipped with a decompression line. In the kneading chamber, a hydrophilic component (liquid) or water as necessary By supplying the hydrophilic component dissolved or dispersed in the solvent and polypropylene of the base resin, removing the solvent in a gaseous state from the vacuum line simultaneously with mixing, and then extruding the resin composition from the extrusion part 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. Moreover, in the said secondary processing process, it is preferable to add a water retention agent as a solid hydrophilic component among hydrophilic components depending on the case.

Specifically, the polypropylene fiber a can be produced as described below. In addition, the manufacturing method of the polypropylene fiber a is not limited to this.
(1) Base resin polypropylene: hydrophilic component (polyoxyethylene alkyl ether): compatibilizing agent = 100: 2 to 8: 2 to 8 (parts by mass) (primary processing resin).
(2) As secondary processing, primary processing resin: high MFR polypropylene = 100: 5 to 15 (parts by mass) is processed into a master batch resin composition (secondary processing resin).
(3) A polypropylene resin composition obtained by mixing the masterbatch resin composition (secondary processing resin) with about 1 to 10 parts by mass and 100 parts by mass of polypropylene is melt-spun to obtain an undrawn yarn. .
(4) The obtained undrawn yarn is drawn, a fiber treating agent is applied, crimps are applied with a crimper, and dried to obtain a polypropylene fiber a.

  The polypropylene fiber a may be a single component of a polypropylene resin, or a composite component of polypropylene resins or other resins. When the polypropylene fiber a is colored, the pigment may be mixed with a polypropylene resin or combined with a component that is easily dyed by a dye and a core-sheath shape.

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

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

  The binding yarn includes a monofilament having a fineness of 10 to 220 dtex. Thereby, there is no sag of a binding yarn and it becomes a thick and lightweight knitted fabric. From the viewpoint of sag and texture, the fineness of the monofilament is preferably 10 to 110 dtex, and more preferably 20 to 50 dtex.

  The binding yarn may be one using the monofilament alone, or may be one in which the monofilament and multifilament or spun yarn are drawn and knitted and knitted. It may be. From the viewpoint of imparting a thick and lightweight property to the knitted fabric, the binding yarn is preferably composed only of the monofilament.

  The fiber constituting the binding yarn is not particularly limited, but is preferably a hydrophobic fiber from the viewpoint of quick drying of washing. The hydrophobic fiber is not particularly limited, and examples thereof include polyester fiber, polyolefin fiber other than polypropylene fiber a, polyamide fiber, acrylic fiber, and vinyl chloride fiber. Examples of the polyester fiber include one or more polyester resins selected from, for example, polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene naphthalate, polylactic acid, polybutylene succinate, and a copolymer thereof. Fibers can be used. As the polyolefin fiber, for example, a fiber 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 made of a polyamide resin such as nylon 6 or nylon 66 can be used. From the viewpoint of washing fast drying, the fibers constituting the binding yarn are preferably polyester fibers.

  The yarn constituting the surface layer may be spun yarn, multifilament, or monofilament. The yarn constituting the surface layer can be composed of hydrophilic fibers and / or hydrophobic fibers. When using a hydrophobic fiber, it is preferable to use a hydrophobic fiber subjected to a hydrophilic treatment from the viewpoint of easily diffusing moisture. The yarn constituting the back layer is not particularly limited, but preferably includes a hydrophobic fiber from the viewpoint of quick drying of washing, and more preferably includes a polypropylene fiber a, similarly to the yarn constituting the back layer. More preferably, the yarn constituting the surface layer is the same as the yarn constituting the back layer. In the yarn constituting the surface layer, the hydrophilic fiber and / or hydrophobic fiber preferably has a single fiber fineness of 0.5 to 3.5 dtex, more preferably 0.6 to 2.5 dtex. preferable.

  The knitted fabric for clothing is not particularly limited as long as it is a structure composed of a surface layer, a back layer (becomes the skin side), and a binding yarn connecting these, but the surface layer and the back layer are knitted with different structures. It is preferable that the back surface layer is rough and the front surface layer is dense. The knitted fabric for clothing does not necessarily have to be clearly confirmed as a three-layer structure in the cross-sectional shape of the knitted fabric viewed from the lateral direction, but is preferably a double face knitted fabric or a corrugated cardboard knitted fabric. These knitting methods are preferable because they can contain many air layers and have good heat retention. Here, the double face knitting means that the inner layer and the outer layer have different knitting structures, and the corrugated cardboard knitting means that the inner layer and the outer layer have the same knitting structure and has an air layer in the space.

  The knitted fabric for clothing may be dyed after the refining process, or may be combined with a water absorption process, an SR (Soil release) process, an antibacterial process, an antistatic process and the like during the finishing process.

  The knitted fabric for clothing preferably has a drying rate after 90 minutes measured by the following test method of 40% or more in accordance with Boken standard BQE A 024-2016, from the viewpoint of high washing quick drying, % Or more is more preferable. A specific measuring method is as described later.

  From the viewpoint of high heat retention, the knitted fabric for clothing preferably has a heat retention rate of 40.5% or more measured by a dry contact method using Thermolab 2 manufactured by Kato Tech Co., and is 41.0% or more. More preferably. A specific measuring method is as described later.

  The knitted fabric for apparel is preferably 30 seconds or less, more preferably 20 seconds or less, more preferably 15 seconds or less, from the viewpoint of excellent water absorbency and consequently washing and drying properties, as measured by the JIS L 1907 dropping method. Even more preferably:

Although the said knitted fabric for clothes is not specifically limited, From a viewpoint of wearability, such as lightweight property, it is preferable that a bulk density is 0.06-0.25 g / cm < ³ >, for example, and 0.08-0. more preferably 2 g / cm ^3, more preferably 0.1~0.15g / cm ^3. Moreover, it is preferable that a fabric weight is 450 g / m < ² > or less, and it is more preferable that it is 200-400 g / m < ² >. Although the said knitted fabric for clothes is not specifically limited, It is preferable that thickness is 4.0 mm or less, and it is more preferable that it is 2.0-3.5 mm.

  The knitted fabric for clothing may be used for various clothing. Examples of the clothing include underwear, underwear, shirts, jumpers, sweaters, pants, training wear, tights, stomachbands, mufflers, hats, gloves, socks, ear pads, and the like.

  Hereinafter, it demonstrates using drawing. FIG. 1 is a schematic explanatory view of an extruder used in one embodiment of the present invention. The extruder 1 includes a raw material supply port 2, a resin melting part 3, a kneading and dispersing part 4, a decompression line 5, an extrusion part 6, and a removal part 7. First, a polymer (a heat-meltable base resin) and a hydrophilic component (liquid) or a hydrophilic component dissolved in water as necessary are supplied from the raw material supply port 2 of the resin melting portion 3. You may mix both before supply. Next, the mixture is fed to the kneading / dispersing unit 4, and a plurality of kneading plates are rotating in the kneading / dispersing unit 4. Here, the hydrophilic components dissolved in the polymer and water are uniformly mixed. Next, moisture is removed from the decompression line 5 in the state of water vapor. Next, the resin composition is extruded from the extruding portion 6, cooled and taken out from the taking out portion 7. If it is cut after cooling, it becomes 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. The two roving yarns 11a and 11b are supplied in parallel to the draft zone including the back roller 103, the middle roller 104, the apron 105 and the front roller 106 via the guide bar 101 and the trumpet 102, and drafted in parallel. Supply to the twist zone. The two drafted roving yarns (fiber bundles) 12a and 12b immediately after being supplied to the twisting zone are mixed with air using a converging device including an air suction unit 107, a ventilation apron 108, a rotating roller 109, and an auxiliary roller 110. Then, the fibers are sucked in the traveling direction of the roving to converge the fibers, and then twisted through the snail wire 111, the traveler 112, and the ring 113 to obtain the spun yarn (silo compact yarn) 20.

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

(Measuring method)
(1) Melt mass flow rate (MFR)
According to ISO1133, it measured by 230 degreeC and a 2.16kg load.
(2) Moisture content According to JIS L 1015 (2010), the moisture content was measured under a standard condition of a temperature of 20 ° C. and a relative humidity of 65%.
(3) English cotton count Measured according to the cotton count measurement method of JIS L 1095 (2010) 9.4.1.
(4) Weight per unit area and thickness Measured according to JIS L 1096 (2010).
(6) Bulk density Calculated based on the basis weight and thickness.
(7) Thermal insulation The thermal insulation rate was measured by the dry contact method using Thermolab 2 manufactured by Kato Tech Co., Ltd., and the thermal insulation was evaluated. Specifically, in a constant air flow (30 cm / s), a heat dissipation rate (power consumption) radiated through a test piece (20 × 20 cm) from a hot plate set at an environmental temperature + 10 ° C. is measured, and a heat retention rate Asked. It is determined that the greater the heat retention rate, the higher the heat retention.
(8) Washing and drying properties In accordance with Boken standard BQE A 024-2016, the drying rate after 90 minutes and the time until the drying rate reached 90% were measured by the following test methods to evaluate the washing and drying properties. The higher the drying rate after 90 minutes, the higher the washing drying property. The shorter the time until the drying rate reaches 90%, the higher the washing drying property.
(A) The test piece was adjusted in a standard state (20 ° C., 65% RH), and the mass (W) was measured.
(B) After being immersed in water for 30 minutes, dehydration was performed for 30 minutes.
(C) After measuring the mass after dehydration (W ₁ ), the test piece was suspended in a standard state environment, the mass (Wx) for each predetermined time was measured, and the drying rate was determined by the following formula.
Drying rate (%) = {(W ₁ −W) − (W _x −W)} / (W ₁ −W) × 100
(9) Water absorption The water absorption time was measured by a JIS L 1907 dropping method to evaluate water absorption. The shorter the water absorption time, the higher the water absorption.
(10) Breathability Breathability was evaluated by JIS L 1096 A method (Fragile type method).

<Manufacture example 1 of a masterbatch resin composition>
[Primary processing resin]
(1) As a water-soluble hydrophilic component, polyoxyalkylene ether (manufactured by Kao Corporation, Emulgen 1108, active ingredient 100 mass%, molecular weight 473) was prepared.
(2) As a base resin, polypropylene (MFR 20 g / 10 min) pellets (columnar shape with a diameter of 2 mm and a height of 2 mm) were prepared.
(3) 80 parts by mass of base resin pellets and 12.5 parts by mass of polypropylene (MFR 800 g / 10 min) containing 4% by mass of polyoxyalkylene ether from the raw material supply port 2 of the extruder shown in FIG. 5 parts by mass and 5 parts by mass of a compatibilizer (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 to 190 ° C. In the resin melting section 3, the feed is fed forward along the rotation axis, and in the kneading and dispersing section 4, a plurality of kneading plates are rotated, where the base resin and the hydrophilic component are uniformly mixed, and then the decompression line 5 The water was removed at the same time by applying a vacuum (negative pressure).
(5) Next, the resin composition was extruded from the extrusion portion 6, cooled, and taken out from the takeout port 7.
(6) It led to the pelletizer and pelletized (primary processing 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 step was added to a low stereoregular polypropylene (trade name “MFR 2000 g / 10 min” as high MFR propylene). 10 parts by mass of “El Modu” S400, manufactured by Idemitsu Kosan Co., Ltd. was mixed and supplied from the raw material supply port 202.
(2) Melt-kneaded, cooled, and pelletized with a pelletizer to obtain a cylindrical polypropylene-based masterbatch resin composition (secondary processing resin) having a diameter of 2 mm and a height of 2 mm.

<Production Example 1 of Fiber>
(1) 100 parts by mass of polypropylene (MFR 20 g / 10 min) pellets (columnar 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 a raw material supply port of an extruder for melt spinning, melt-kneaded with an extruder using a conventional melt spinning machine, and then melt-spun. did. Then, using a known stretching machine, stretching and applying so that the adhesion amount of the hydrophilic fiber treatment agent is 0.15% by mass and cutting, the single fiber fineness is about 1.8 dtex, and the fiber length is 38 mm. Polypropylene fiber (hereinafter also referred to as hydrophilic PP fiber (black)). The water content of the obtained hydrophilic PP fiber (black) was 0.3% by mass.

<Production Example 2 of Fiber>
Pellets of polypropylene (MFR 20 g / 10 min) (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. And melt spun. Then, using a known stretching machine, stretching and applying so that the adhesion amount of the hydrophilic fiber treatment agent is 0.15% by mass and cutting, the single fiber fineness is about 1.3 dtex, and the fiber length is 38 mm. Polypropylene fibers (hereinafter also referred to as regular PP fibers). The moisture content of the obtained regular PP fiber was 0.1% by mass.

<Production example 1 of spun yarn>
The hydrophilized PP fiber (black) obtained in Production Example 1 was sequentially added to the blended cotton process, the card process, the kneading process, and the roving process to obtain a roving of 100 gelen / 12 yd. Next, using a single roving made of 100% by mass of the obtained hydrophilic PP fiber (black), a ring spinning machine incorporating a compact spinning system was used to give a draft of 40 times, and the roving was made with air. After sucking in the advancing direction to converge the fibers, the yarn was twisted with a twist coefficient of 3.6 to produce a spun yarn (compact yarn) of English cotton count 40s.

<Production example 2 of spun yarn>
25 parts by mass of the hydrophilized PP fiber (black) obtained in Production Example 1 and 75 parts by mass of the regular PP fiber obtained in Production Example 2 of the fiber are used in the cotton-spun process, the card process, the kneading process, and the roving process. Sequentially, a roving of 50 gelen / 12 yd was obtained. Using two roving yarns composed of 25% by mass of the obtained hydrophilized PP fiber (black) and 75% by mass of regular PP fiber, a 40 times draft was given by a ring spinning machine, and a twisted yarn with a twist coefficient of 3.4. Then, a spun yarn (silo yarn) having an English cotton count of 40 s was produced.

<Production example 3 of spun yarn>
The regular PP fibers obtained in Production Example 2 were sequentially added to the blended cotton process, the card process, the kneading process, and the roving process to obtain a 90 gelen / 12 yd roving. Using one roving made of 100% by mass of the obtained regular PP fiber, a ring spinning machine provided a draft of 36 times, twisted with a twist coefficient of 3.4, and spun yarn with an English cotton count of 40s ( Ring yarn).

Example 1
Compact yarn (hereinafter also referred to as “PP40”) and polyester multifilament (33 dtex, number of filaments) composed of 100% by mass of the hydrophilized PP fiber (black) obtained in Production Example 1 as the surface layer and back layer yarns 24, hereinafter also referred to as “30d / 24F”), and polyester monofilament (33.3 dtex, hereinafter also referred to as “30d / 1F”) as the binding yarn, and FIGS. 3A and 3B. In accordance with the knitting structure diagram (knitting diagram) shown and the conditions shown in Table 1 below, a corrugated cardboard knitted fabric (weight per unit area: 281 g / m) with a 34-inch 18 G gauge double-sided knitting machine, the front surface is a tense structure and the back surface is a honeycomb structure m ² ) was organized. The fiber mixing ratio was 69.8% by mass of hydrophilic PP fiber (black) and 30.2% by mass of polyester fiber. After the obtained knitted fabric was soaped, a finishing set was performed at 130 ° C. for 90 seconds using a tenter.

(Example 2)
As a yarn for the front and back layers, a silo yarn (hereinafter referred to as “PP40 (gray cocoon)”) comprising 25% by mass of the hydrophilized PP fiber (black) obtained in Production Example 2 and 75% by mass of regular PP fiber. ) And polyurethane fiber yarn (low-temperature polyurethane elastic fiber, “Mobilon MTR22-R”, 22 dtex manufactured by Nisshinbo Textile Co., Ltd., hereinafter also referred to as “Pu20d”) are used together as a polyester monofilament (30d) 1F), a 34-inch 24G gauge double-sided knitting machine according to the conditions shown in FIGS. 4A and 4B and the conditions shown in Table 2 below. A corrugated cardboard knitted fabric (with a basis weight of 387 g / m ² ) was knitted. The fiber mixing ratio was 19.4 mass% for the hydrophilic PP fiber (black), 58.1 mass% for the regular PP fiber, 18.7 mass% for the polyester fiber, and 3.8 mass% for the polyurethane fiber. After the obtained knitted fabric was soaped, a finishing set was performed at 130 ° C. for 90 seconds using a tenter.

(Comparative Example 1)
As in Example 1, except that comb yarn (40th count, "CM40" in the following) and polyester multifilament (30d / 24F)) were used as the surface layer and back layer yarn, the surface was a tengu structure. Yes, a corrugated cardboard knitted fabric having a honeycomb structure on the back surface (basis weight 261 g / m ² ) was knitted. Specific knitting conditions are shown in Table 3 below. The fiber mixing ratio was 67.3 mass% for cotton fibers and 32.7 mass% for polyester fibers. Met. After the obtained knitted fabric was soaped, a finishing set was performed once at 90 ° C. for 90 seconds using a tenter.

(Comparative Example 2)
As the surface layer yarn, combed yarn (CM40) and polyurethane fiber yarn (Pu20d) are used together, and the back layer yarn is used as a ring yarn (hereinafter referred to as 100% by mass of regular PP fiber obtained in Production Example 3). , Also referred to as “PP40 / R”) and a polyurethane fiber yarn (Pu20d), except that they are used in a uniform manner. The ground (weight per unit area 348 g / m ² ) was knitted. Specific knitting conditions are shown in Table 3 below. The fiber mixing ratio was 32.6% by mass for cotton, 44.9% by mass for regular PP fiber, 18.7% by mass for polyester fiber, and 3.8% by mass for polyurethane fiber. After the obtained knitted fabric was soaped, a finishing set was performed twice at 130 ° C. for 90 seconds each using a tenter.

(Comparative Example 3)
Comb yarn (30th, hereinafter referred to as “CM30”) is used as the surface layer and back layer yarn, and polyester multifilament (83 dtex, 48 filaments, hereinafter “75d / 48F” is used as the binding yarn. ), And in accordance with the knitting structure chart (knitting diagram) shown in FIG. 5 and the conditions shown in Table 5 below, the knitted fabric of the corrugated cardboard knitted fabric (weight per unit area 285 g / m ² ) with a 34 inch 24 G gauge double-sided knitting machine. ) Was organized. The fiber mixing ratio was 76% by mass for cotton fibers and 24% by mass for polyester fibers. After the obtained knitted fabric was soaped, a finishing set was performed at 130 ° C. for 90 seconds using a tenter.

  The thickness, bulk density, heat retention rate, washing drying property, water absorption and air permeability of the knitted fabrics of Examples 1-2 and Comparative Examples 1-3 were measured as described above, and the results are shown in Table 6 below. Table 6 also shows the course degree and the wal degree.

  As can be seen from the results in Table 6 above, the knitted fabrics of the examples had high heat retention and good lightness and washing drying properties. The knitted fabric of Example 2 using polypropylene fibers and polyurethane fibers for the surface layer and the back layer had a higher heat retention rate than the knitted fabric of Example 1 using no polyurethane fibers for the surface layer and the back layer. This is thought to be because the insertion of polyurethane fibers in the front surface layer and the back surface layer clogged, the air permeability was lowered, and the heat retaining effect could be increased.

Normally, increasing the yarn supply ratio of the binding yarn (binding yarn length (cm / 100 needles) ÷ surface layer yarn length (cm / 100 needles)) will increase the fabric thickness. In Comparative Example 3 using a multifilament, the thickness is the lowest even if the yarn feeding ratio is the highest as compared with Examples 1-2 and Comparative Examples 1-2. Therefore, the bulk density is 0.248 g / cm ³ , which is about twice or more that of monofilament use, and is inferior in lightness. In addition, when a polyurethane fiber yarn is inserted into the front surface layer and the back surface layer, the packing is clogged and the lightness is inferior, while the heat retaining property is improved.

  The knitted fabrics of Example 1 and Comparative Example 1 have a tense structure on the front surface and the same structure as the honeycomb structure on the back surface, and the knitted fabric without the polyurethane is good in air permeability. However, Example 1 in which the hydrophilized polypropylene fibers were arranged in both layers was particularly improved in laundry drying, and the drying rate after 90 minutes was twice that of Comparative Example 1.

DESCRIPTION OF SYMBOLS 1 Extruder 2 Raw material supply port 3 Resin melt | fusion part 4 Kneading dispersion | distribution part 5 Depressurization line 6 Extrusion part 7 Extraction part 11a, 11b Coarse yarn 12a, 12b Drafted roving (fiber bundle)
20 Spinning yarn 101 Guide bar 102 Trumpet 103 Back roller 104 Middle roller 105 Apron 106 Front roller 107 Air suction part 108 Ventilation apron 109 Rotating roller 110 Auxiliary roller 111 Snail wire 112 Traveler 113 Ring

Claims (7)

A knitted fabric for clothing composed of a front surface layer, a back surface layer, and a binding yarn connecting these,
At least the back layer is composed of a yarn containing a hydrophilized polypropylene fiber having a moisture content of 0.15% by mass or more as measured according to JIS L 1015 (2010).
The knitted fabric for clothing, wherein the binding yarn includes a monofilament having a fineness of 10 to 220 dtex. The knitted fabric for clothing according to claim 1, wherein a bulk density of the knitted fabric for clothing is 0.06 to 0.25 g / cm ³ .   The knitted fabric for clothing according to claim 1 or 2, wherein at least the back surface layer is knitted with a polyurethane fiber yarn inserted in addition to the yarn containing the hydrophilic polypropylene fiber.   The knitted fabric for clothing according to any one of claims 1 to 3, wherein the monofilament is a polyester fiber.   The knitted fabric for clothing according to any one of claims 1 to 4, wherein the hydrophilic polypropylene fiber includes 0.025 to 0.25 parts by mass of a hydrophilic component with respect to 100 parts by mass of the polypropylene component.   The knitted fabric for clothing according to claim 5, wherein the hydrophilic component includes a nonionic surfactant.   The clothing using the knitted fabric for clothing according to any one of claims 1 to 6.

Images