JP6556974B1 - Spun yarn, method for producing the same, and fabric including the same - Google Patents

Abstract

The present invention is a spun yarn containing more than 50% by mass of a polypropylene fiber having a moisture content of less than 0.15% by mass, the number of fluff having a length of 3 mm or more is 40/10 m or less, and the porosity is 40 The present invention relates to a spun yarn having a twisting coefficient of 2.4 to 6.0, a fluff number of 3 mm or more and 40 or 10 m or less, and a twist angle of 23 ° or more. The present invention is also a spun yarn containing 5% by mass or more of polypropylene fiber having a moisture content of 0.15% by mass or more measured according to JIS L 1015 (2010), and has a length of 3 mm or more. Is 40 pieces / 10 m or less, the porosity is 40 to 65%, the twist coefficient is 2.4 to 6.0, or the number of fluffs having a length of 3 mm or more is 40 pieces / 10 m or less. And a spun yarn having a twist angle of 23 ° or more. Thereby, the spun yarn containing the polypropylene fiber that can improve the anti-pilling property of the fabric, the production method thereof, and the fabric including the same are provided.

Description

  The present invention relates to a spun yarn including polypropylene fibers, a method for producing the spun yarn, and a fabric including the spun yarn.

  Polypropylene fibers are lightweight and heat-retaining fibers, and are widely used in clothing, industrial materials, and the like. For example, Patent Documents 1 and 2 describe that polypropylene fibers may be used as the water-repellent fibers in spun yarn for clothing combining water-repellent fibers and hydrophilic fibers. Patent Document 3 describes that a polypropylene fiber may be used as a synthetic fiber in a silospun spun yarn made of a different raw roving used for industrial materials such as furniture.

  On the other hand, synthetic fibers have higher fiber strength than natural fibers, and fabrics using spun yarns containing synthetic fibers are prone to pilling, and it has been studied to improve the anti-pilling properties of synthetic fibers. For example, in Patent Documents 4 to 6, it is proposed to improve the anti-pilling property of a fabric using the spun yarn by reducing the number of fluffs in the spun yarn containing polyester short fibers.

Japanese Patent Laid-Open No. 04-091240 JP 05-033234 A Japanese Patent Laid-Open No. 10-088440 JP 2008-133854 A JP 2004-197243 A JP 2004-218092 A

  However, Patent Documents 1 to 6 do not discuss improving the anti-pilling property of a fabric when a spun yarn containing polypropylene fiber is used.

  In order to solve the above-mentioned conventional problems, the present invention provides a spun yarn including a polypropylene fiber that can improve the anti-pilling property of the fabric, a method for producing the same, and a fabric including the spun yarn.

  The present invention is a spun yarn containing more than 50% by mass of a polypropylene fiber having a moisture content of less than 0.15% by mass, measured according to JIS L 1015 (2010), which is JIS L 1095 (2010). 22.2 The number of fluff having a length of 3 mm or more present per 10 m of the spun yarn measured according to the B method is 40/10 m or less, and the spun yarn has a porosity of 40 to 65%, The present invention relates to a spun yarn having a twist coefficient of 2.4 to 6.0.

  The present invention is also a spun yarn containing 5% by mass or more of polypropylene fiber, and the polypropylene fiber has a moisture content of 0.15% by mass or more measured according to JIS L 1015 (2010). , JIS L 1095 (2010) 9.22.2 The number of fluff having a length of 3 mm or more present per 10 m of the spun yarn measured according to the B method is 40/10 m or less, and the spun yarn has pores The present invention relates to a spun yarn having a ratio of 40 to 65% and a twist coefficient of 2.4 to 6.0.

  The present invention also relates to a spun yarn containing more than 50% by mass of a polypropylene fiber having a moisture content of less than 0.15% by mass, measured according to JIS L 1015 (2010), and comprising JIS L 1095 (2010) 9.22.2 The number of fluff having a length of 3 mm or more present per 10 m of the spun yarn measured according to the method B is 40/10 m or less, and the spun yarn has a twist angle of 23 ° or more. It is related with the spun yarn characterized by this.

  The present invention is also a spun yarn containing 5% by mass or more of polypropylene fiber, and the polypropylene fiber has a moisture content of 0.15% by mass or more measured according to JIS L 1015 (2010). , JIS L 1095 (2010) 9.22.2 The number of fluff having a length of 3 mm or more present per 10 m of the spun yarn measured according to the B method is 40/10 m or less, and the spun yarn is twisted The present invention relates to a spun yarn having an angle of 23 ° or more.

  The present invention also relates to a method for producing the spun yarn, wherein the water content measured in accordance with at least one JIS L 1015 (2010) is less than 0.15% by mass in ring spinning. A step of preparing a roving yarn A containing more than 50% by mass of a fiber, a step of supplying and drafting two roving yarns including at least one roving yarn A to a draft zone, and supplying the roving yarn to the twisting yarn zone while aligning; And a method for producing a spun yarn, comprising a step of twisting the two roving yarns immediately after being supplied to the twisting zone with air in the direction of the roving to cause the fibers to converge and then twisting the fibers.

  The present invention is also a method for producing the spun yarn described above, wherein in the ring spinning, a step of preparing a roving yarn B containing at least one polypropylene fiber B at 5% by mass or more, at least one in the draft zone Supplying and drafting two rovings including the roving yarn B, and feeding the two rovings immediately after being supplied to the twisting zone with air; And the step of twisting the fiber after being sucked into the polypropylene fiber, wherein the polypropylene fiber has a moisture content measured according to JIS L 1015 (2010) of 0.15% by mass or more. The present invention relates to a method for producing spun yarn.

  The present invention also relates to a fabric comprising the spun yarn.

  INDUSTRIAL APPLICABILITY The present invention can provide a spun yarn including a polypropylene fiber that can improve the anti-pilling property of the fabric, and a fabric having good anti-pilling property including the spun yarn. Moreover, according to this invention, the spun yarn containing the polypropylene fiber which can improve the anti-pilling property of a fabric can be obtained. In particular, when a polypropylene fiber having a moisture content measured in accordance with JIS L 1015 (2010) of 0.15% by mass or more is used, the spun yarn containing the polypropylene fiber that can improve the anti-pilling property of the fabric. The productivity of the manufacturing process is also improved.

FIG. 1 is a partial perspective view of an example ring spinning machine used in an embodiment of the present invention. FIG. 2 is a schematic explanatory view of an example of an extruder used in one embodiment of the present invention. FIG. 3 is a side view photograph of the spun yarn illustrating the twist angle of the spun yarn in one embodiment of the present invention. FIG. 4 is a side photograph of the spun yarn illustrating the diameter of the spun yarn in one embodiment of the present invention. FIG. 5 is a knitting structure chart used in Examples 6-8 and Comparative Examples 7-8. FIG. 6 is a knitting structure chart used in the ninth embodiment. FIG. 7A is a partial view of the knitting structure chart used in Example 10. FIG. FIG. 7B is a partial view of the knitting structure chart used in the tenth embodiment. FIG. 8A is a partial view of the knitting structure chart used in Example 11. FIG. FIG. 8B is a partial view of the knitting structure chart used in Example 11. FIG. 9 is a knitting structure chart used in Comparative Example 12.

  The inventors of the present invention diligently studied to improve the anti-pilling property of a fabric when a spun yarn containing a polypropylene fiber is used. As a result, in a spun yarn containing more than 50% by mass of polypropylene fiber having a moisture content of less than 0.15% by mass measured according to JIS L 1015 (2010), JIS L 1095 (2010) 9.22.2 The number of fluff having a length of 3 mm or more present per 10 m of spun yarn measured according to the B method is 40/10 m or less, the porosity is 40 to 65%, and the twist coefficient is 2.4 to 6.0. Alternatively, the number of fluffs having a length of 3 mm or more existing per 10 m of spun yarn measured according to JIS L 1095 (2010) 9.22.2 B method should be 40/10 m or less, and the twist angle should be 23 ° or more. It was found that the anti-pilling property of the fabric using the spun yarn is improved. Further, a spun yarn having such fluff number, porosity, and twist coefficient, or having such fluff number and twist angle, is moisture measured according to JIS L 1015 (2010) in ring spinning. After preparing a roving yarn A containing a polypropylene fiber having a rate of less than 0.15% by mass of more than 50% by mass, supplying two rovings containing at least one roving A to a draft zone and drafting, It has been found that it can be obtained by supplying the two rovings immediately after being supplied to the twisting zone while drawing them together, sucking the roving yarn immediately after being supplied to the twisting zone with air in the direction of the roving to converge the fibers, and then twisting the fibers. . In particular, by using the roving yarn B containing 5% by mass or more of polypropylene fiber having a moisture content of 0.15% by mass or more measured according to JIS L 1015 (2010), the productivity of the production process of the spun yarn is improved. I found it to increase. This is because static electricity tends to occur during the production process when polypropylene fibers having a moisture content of less than 0.15% by mass measured according to JIS L 1015 (2010) are used, but in JIS L 1015 (2010) It is because generation | occurrence | production of static electricity was suppressed by using the polypropylene fiber whose moisture content measured similarly is 0.15 mass% or more. By suppressing the generation of static electricity, it is possible to provide stable production by suppressing mechanical degradation and machine failure due to fiber winding around the rotating parts of each machine base in the spinning process and sliver disturbance. In addition, it is possible to suppress deterioration in quality such as pilling properties when used as a spun yarn or a fabric.

  In the following, unless otherwise indicated, the moisture content means a value measured according to JIS L 1015 (2010). The fiber for which the moisture content is to be measured is measured by arbitrarily taking out the fiber in a raw cotton state before spinning, that is, in a state where a fiber treatment agent or the like is also adhered. In the following, unless otherwise indicated, the number of fluff means the number of fluffs of a predetermined length existing per 10 m of spun yarn measured according to JIS L 1095 (2010) 9.22.2 B method. To do.

  Hereinafter, a spun yarn containing more than 50% by mass of a polypropylene fiber having a moisture content of less than 0.15% by mass (hereinafter, also referred to as polypropylene fiber A) will be described as a spun yarn A. A spun yarn containing 5% by mass or more of polypropylene fiber (hereinafter also referred to as polypropylene fiber B) of at least mass% will be described as spun yarn B.

(Spun Yarn A)
The spun yarn A has a length of 40 mm / 10 m or less, a porosity of 40 to 65%, a twist coefficient of 2.4 to 6.0, or a number of fluff of 3 mm or more. Is 40/10 m or less and the twist angle is 23 ° or more, the anti-pilling property of the fabric including the spun yarn A is improved.

  The spun yarn A has a good anti-pilling property when the number of fluff having a length of 3 mm or more is 40/10 m or less. From the viewpoint of further improving the anti-pilling property of the fabric, the number of fluffs having a length of 3 mm or more is preferably 35/10 m or less, more preferably 30/10 m or less, and most preferably 10/10 m or less. . Further, the number of fluffs having a length of 5 mm or more is preferably 5/10 m or less, more preferably 3/10 m or less, further preferably 1/10 m or less, and most preferably 0. / 10m.

  When the spun yarn A has a porosity of 40 to 65%, the anti-pilling property of the fabric is improved. From the viewpoint of the anti-pilling property and soft texture of the fabric, the porosity is preferably 43 to 65%. In the present invention, the porosity means the proportion of air in the yarn, and as will be described later, the yarn diameter is calculated from the side view of the yarn with an electron microscope, and is calculated based on the yarn diameter and specific gravity.

  The spun yarn A has a twist coefficient of 2.4 to 6.0, whereby the fabric has good anti-pilling properties. From the viewpoint of the anti-pilling property and soft texture of the fabric, the twist coefficient is preferably 2.8 to 4.5, and more preferably 3.0 to 4.0.

  The spun yarn A has a good anti-pilling property of the fabric when the twist angle is 23 ° or more. From the viewpoint of further improving the anti-pilling property of the fabric, the twist angle is preferably 25 ° or more, more preferably 26 ° or more, and further preferably 27 ° or more. In the spun yarn A, the upper limit of the twist angle is not particularly limited, but is preferably 45 ° or less, for example, from the viewpoint of improving knitting properties.

  The spun yarn A is not particularly limited as long as it contains more than 50% by mass of polypropylene fiber A, but from the viewpoint of lightness and heat retention, it is preferable to contain 60% by mass or more, and 70% by mass or more of polypropylene fiber A. It is more preferable. As the polypropylene fiber A, a regular polypropylene fiber used as a water-repellent fiber may be appropriately used.

  In the polypropylene fiber A, the polypropylene may be a propylene homopolymer, or may be a copolymer containing propylene and a component copolymerizable therewith with a propylene content exceeding 50 mol%. Good. The component copolymerizable with propylene is not particularly limited, and examples thereof include olefin monomers such as ethylene, butene, and methylpentene. Preferably, it is a propylene homopolymer. 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. In the present invention, the MFR of polypropylene is measured under a load of 2.16 kg at 230 ° C. according to ISO1133.

  The polypropylene fiber A can be produced by a conventional method. For example, using a spinneret, polypropylene or a resin composition containing polypropylene is melt-spun into an unstretched yarn, the resulting unstretched yarn is stretched, a fiber treatment agent (oil) is applied, and crimped with a crimper. It can be obtained by applying and drying.

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

  Although the fiber length of the polypropylene fiber A is not particularly limited, it is preferably 24 to 75 mm, more preferably 28 to 65 mm, further preferably 32 to 54 mm, and particularly preferably 34 to 48 mm.

  The single fiber strength of the polypropylene fiber A is preferably 1.8 to 7.0 cN / dtex, more preferably 2.0 to 6.0 cN / dtex, and 3.0 to 6.0 cN / dtex. More preferably it is. When the single fiber strength is 1.8 cN / dtex or more, the fiber is difficult to break even when subjected to an external force (for example, spinning tension) when processing the fiber. Further, when the single fiber strength is 7 cN / dtex or less, a fiber having better anti-pilling property can be obtained.

  The elongation of the polypropylene fiber A is preferably 5 to 70%, more preferably 10 to 40%. If the elongation is 5 to 70%, fibers with a soft texture can be obtained.

  The spun yarn A may contain other fibers in addition to the polypropylene fiber A. Examples of other fibers include, but are not limited to, synthetic fibers such as polyolefin fibers other than polypropylene fibers, acrylic fibers, polyester fibers, nylon fibers, acetate fibers, acrylate fibers, ethylene vinyl alcohol fibers, and urethane fibers. And natural fibers such as silk fibers, wool fibers, cashmere fibers, cotton fibers, hemp fibers, rayon fibers and cupra fibers. The spun yarn A may appropriately include other fibers of less than 50% by mass according to the use and purpose. The spun yarn A may contain less than 5% by mass of a polypropylene fiber B, which will be described later, as other fibers.

  The polypropylene fiber A and other fibers are not particularly limited, but may be, for example, a single fiber fineness of 0.1 to 100 dtex. When the spun yarn A is used for clothing, the polypropylene fiber A and other fibers preferably have a single fiber fineness of 0.4 to 5 dtex, more preferably 0.5 to 3.5 dtex, 0 More preferably, it is 6 to 2.5 dtex. When the spun yarn A is used as an industrial material, the single fiber fineness is preferably 5 to 50 dtex. The polypropylene fiber A and other fibers preferably have a fiber length of 24 to 75 mm.

  The count of the spun yarn A 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 15 to 85 S, and still more preferably 20 to 80S.

  The spun yarn A is preferably a twisted yarn composed of two fiber bundles. A twisted yarn composed of two fiber bundles can be confirmed by unraveling the spun yarn into two fiber bundles when twisted in the direction opposite to the twisting direction and untwisted. In the case of a twisted yarn composed of two fiber bundles, when each fiber bundle is drawn and twisted, each fiber bundle is also subjected to a sweet twist. The pilling property when this is done is significantly improved. Further, since the fiber bundles drafted from the respective rovings are in a state of being twisted with each other, the fiber bundles and the fiber bundles are entangled with each other (entanglement between the fiber bundles) to improve the pilling when the fabric is made. The property is significantly improved. A twisted yarn composed of two fiber bundles can be produced by silo compact spinning described later.

  The spinning method of the spun yarn A is not particularly limited, but it can be produced by performing spinning in the ring method in the following steps. Preparation of roving yarn A containing at least one polypropylene fiber A in an amount of more than 50% by mass in advance, supplying two roving yarns containing at least one roving yarn A to the draft zone, drafting, and aligning The spun yarn A can be obtained by feeding the two roving yarns immediately after being supplied to the twisting zone while air is sucked in the advancing direction of the roving yarn to converge the fibers and then twisting the fibers. it can. 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. . In silo compact spinning, by adjusting the twist coefficient in the range of 2.4 to 6.0, it is easy to obtain a spun yarn having the above-mentioned predetermined number of fluffs and porosity, and the anti-pilling property of the fabric is improved. it can. From the viewpoint of the anti-pilling property and soft texture of the fabric, the twist coefficient is preferably 2.8 to 4.5, and more preferably 3.0 to 4.0.

  Both of the two rovings may be roving A. Alternatively, the roving yarn A and another roving yarn may be used in appropriate combination so that the content of the polypropylene fiber A in the obtained spun yarn A is more than 50% by mass.

(Spun yarn B)
The spun yarn B has a number of fluffs of 3 mm or more in length of 40/10 m or less, a porosity of 40 to 65%, a twist coefficient of 2.4 to 6.0, or a number of fluffs of 3 mm or more in length. Is 40/10 m or less and the twist angle is 23 ° or more, the anti-pilling property of the fabric including the spun yarn B is improved.

  The spun yarn B has a good anti-pilling property when the number of fluff having a length of 3 mm or more is 40/10 m or less. From the viewpoint of further improving the anti-pilling property of the fabric, the number of fluffs having a length of 3 mm or more is preferably 35/10 m or less, more preferably 30/10 m or less, and most preferably 10/10 m or less. . Further, the number of fluffs having a length of 5 mm or more is preferably 5/10 m or less, more preferably 3/10 m or less, further preferably 1/10 m or less, and most preferably 0. / 10m.

  The spun yarn B has a porosity of 40 to 65%, whereby the fabric has good anti-pilling properties. From the viewpoint of the anti-pilling property and soft texture of the fabric, the porosity is preferably 50 to 65%, more preferably 55 to 65%.

  The spun yarn B has a twist coefficient of 2.4 to 6.0, so that the fabric has good anti-pilling properties. From the viewpoint of the anti-pilling property and soft texture of the fabric, the twist coefficient is preferably 2.8 to 4.5, and more preferably 3.0 to 4.0.

  The spun yarn B has a good anti-pilling property when the twist angle is 23 ° or more. From the viewpoint of further improving the anti-pilling property of the fabric, the twist angle is preferably 25 ° or more, more preferably 26 ° or more, and further preferably 27 ° or more. In the spun yarn B, the upper limit of the twist angle is not particularly limited, but is preferably 45 ° or less, for example, from the viewpoint of improving knitting properties.

  The spun yarn B is not particularly limited as long as it contains 5% by mass or more of polypropylene fiber B, but from the viewpoint of productivity in the spinning process, it is preferable to contain 30% by mass or more, and 50% by mass or more of polypropylene fiber B. Is more preferable.

  The polypropylene fiber B may have 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 polypropylene fiber B has a moisture content of 1.0 mass% or less, More preferably, it is 0.4 mass% or less. For example, a hydrophilic component can be included in polypropylene fiber to make it hydrophilic, and a polypropylene fiber B having a moisture content of 0.15% by mass or more can be obtained. The polypropylene fiber B 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 fiber B, the polypropylene may be a propylene homopolymer, or may be a copolymer containing propylene and a component copolymerizable therewith having a propylene content exceeding 50 mol%. Good. The component copolymerizable with propylene is not particularly limited, and examples thereof include olefin monomers such as ethylene, butene, and methylpentene. Preferably, it is a propylene homopolymer. 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 B can be obtained by melt spinning a polypropylene resin composition containing polypropylene and a masterbatch resin composition containing a hydrophilic component. The polypropylene resin composition preferably contains 1 to 10 parts by mass of the masterbatch resin composition with respect to 100 parts by mass of polypropylene.

  The masterbatch resin composition includes polypropylene as a base resin that can be melted by heating and a hydrophilic component. 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 polypropylene as the base resin may be the same as or different from the polypropylene constituting the polypropylene fiber B.

  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. 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 high MFR polypropylene preferably has an MFR of 100 to 3000 g / 10 min, and more preferably 500 to 2500 g / 10 min. 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.

  The polypropylene fiber B can be produced by a conventional method except that a polypropylene resin composition containing polypropylene and a masterbatch resin composition containing a hydrophilic component is used. 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 (oil agent), crimping with a crimper, and drying.

Specifically, a polypropylene fiber B (undrawn yarn) can be produced as described below.
(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.

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

  The fiber cross-sectional shape of the polypropylene fiber B 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.

  Although the fiber length of the polypropylene fiber B is not particularly limited, it is preferably 24 to 75 mm, more preferably 28 to 65 mm, further preferably 32 to 54 mm, and particularly preferably 34 to 48 mm.

  The single fiber strength of the polypropylene fiber B is preferably 1.8 to 7.0 cN / dtex, more preferably 2.0 to 6.0 cN / dtex, and 3.0 to 6.0 cN / dtex. More preferably it is. When the single fiber strength is 1.8 cN / dtex or more, the fiber is difficult to break even when subjected to an external force (for example, spinning tension) when processing the fiber. Further, when the single fiber strength is 7.0 cN / dtex or less, a fiber having better anti-pilling property can be obtained.

  The elongation of the polypropylene fiber B is preferably 5 to 70%, and more preferably 10 to 40%. If the elongation is 5 to 70%, fibers with a soft texture can be obtained.

  The spun yarn B may contain other fibers in addition to the polypropylene fiber B. Examples of other fibers include, but are not limited to, synthetic fibers such as polyolefin fibers other than polypropylene fibers B, acrylic fibers, polyester fibers, nylon fibers, acetate fibers, acrylate fibers, ethylene vinyl alcohol fibers, and urethane fibers. Examples include fibers, natural fibers such as silk fibers, wool fibers, cashmere fibers, cotton fibers, and hemp fibers, and regenerated fibers such as rayon fibers, cupra fibers, and solvent-spun cellulose fibers. The spun yarn B may contain 50% by mass or less of other fibers as appropriate depending on the application and purpose. The spun yarn B may contain 5% by mass or more of the polypropylene fiber B and 95% by mass or less of other polypropylene fibers other than the polypropylene fiber B. From the viewpoint of lightness and heat retention, the spun yarn B preferably contains 50% by mass or more, more preferably 70% by mass or more, and more preferably 80% by mass or more of the polypropylene fiber B and other polypropylene fibers. More preferably, it is more preferably 90% by mass or more, and particularly preferably 100% by mass.

  When the spun yarn B is a yarn (mixed yarn) in which 90% by mass or more of the polypropylene fiber B and other polypropylene fibers are mixed, the content of the polypropylene fiber B with respect to the total is 5% by mass or more. It is preferable. More preferably, it is 30% by mass or more, and still more preferably 50% by mass or more. When the polypropylene fiber B is in the above range, the generation of static electricity in the spinning process is suppressed, and thus the productivity tends to be improved.

  Although the polypropylene fiber B and other fibers are not particularly limited, for example, the single fiber fineness may be 0.1 to 100 dtex. When the spun yarn B is used for clothing, the polypropylene fiber B and other fibers preferably have a single fiber fineness of 0.4 to 5 dtex, more preferably 0.5 to 3.5 dtex, 0 More preferably, it is 6 to 2.5 dtex. When the spun yarn B is used as an industrial material, the single fiber fineness is preferably 5 to 50 dtex. The polypropylene fiber B and other fibers preferably have a fiber length of 24 to 75 mm.

When the spun yarn B is used for clothing, the average fineness of the polypropylene fiber B and the other polypropylene fibers is 0. When the yarn is composed of only the polypropylene fibers B and other polypropylene fibers (mixed yarn). It is preferably 8 to 2.2 dtex. More preferably, it is 1.2 to 2.0 dtex. When the average fineness is in the above range, productivity and texture in the spinning process tend to be improved.
The average fineness was calculated as follows.
Average fineness (dtex) = (fineness of polypropylene fiber B × mixing rate) + (fineness of other polypropylene fibers × mixing rate)

  The count of the spun yarn B 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 15 to 85 S, and still more preferably 20 to 80S.

  The spun yarn B is preferably a twisted yarn composed of two fiber bundles. A twisted yarn composed of two fiber bundles can be confirmed by unraveling the spun yarn into two fiber bundles when twisted in the direction opposite to the twisting direction and untwisted. In the case of a twisted yarn composed of two fiber bundles, when each fiber bundle is drawn and twisted, each fiber bundle is also subjected to a sweet twist. The pilling property when this is done is significantly improved. Further, since the fiber bundles drafted from the respective rovings are in a state of being twisted with each other, the fiber bundles and the fiber bundles are entangled with each other (entanglement between the fiber bundles) to improve the pilling when the fabric is made. The property is significantly improved. A twisted yarn composed of two fiber bundles can be produced by silo compact spinning described later.

  The spinning method of the spun yarn B is not particularly limited, but it can be produced by performing spinning in the ring method in the following steps. In advance, a roving yarn B containing at least 5% by mass of at least one polypropylene fiber B is prepared, and two roving yarns containing at least one roving yarn B are supplied to the draft zone, drafted, and then aligned. Spun yarn B (silo-compact yarn) is supplied to the twisted yarn zone, and the two roasted yarns immediately after being supplied to the twisted yarn zone are sucked with air in the direction of the coarse yarn to converge the fibers and then twisted. Can be obtained. In silo compact spinning, by adjusting the twist coefficient in the range of 2.4 to 6.0, it is easy to obtain a spun yarn having the above-mentioned predetermined number of fluffs and porosity, and the anti-pilling property of the fabric is improved. it can. From the viewpoint of the anti-pilling property and soft texture of the fabric, the twist coefficient is preferably 2.8 to 4.5, and more preferably 3.0 to 4.0.

  Both of the two rovings may be roving B. Alternatively, the roving yarn B and another roving yarn may be used in appropriate combination so that the content of the polypropylene fiber B in the spun yarn B obtained is 5 mass% or more.

(Fabric)
The fabric includes the spun yarn described above. The fabric may be a knitted fabric or a woven fabric. The fabric preferably contains 50% by mass or more, more preferably 75% by mass or more, of one or more spun yarns selected from the group consisting of the spun yarn A and the spun yarn B from the viewpoint of improving the anti-pilling property. , 85% by mass or more, more preferably 95% by mass or more, and particularly preferably 100% by mass. In addition to the spun yarn A and the spun yarn B, the fabric may include other yarns such as a spun yarn and / or a filament yarn as long as the effects of the present invention are not impaired. The fabric may have a single layer structure or may include two or more layers.

The fabric preferably includes a surface layer and a back surface layer (skin side), and the surface layer and / or the back surface layer preferably includes one or more spun yarns selected from the group consisting of spun yarn A and spun yarn B. By including one or more spun yarns selected from the group consisting of spun yarn A and spun yarn B, the anti-pilling property of the fabric is enhanced. From the viewpoint of further improving the anti-pilling property, it is preferable to contain 50% by mass or more of one or more spun yarns selected from the group consisting of spun yarn A and spun yarn B, more preferably 75% by mass or more, and 85% by mass. %, More preferably 95% by mass or more, still more preferably 100% by mass.

  In addition, the fabric includes at least one spun yarn selected from the group consisting of spun yarn A and spun yarn B in the front surface layer and / or the back surface layer, that is, a polypropylene fiber that is a hydrophobic fiber. Increases quick-drying of washing. In addition, when the surface layer and / or the back surface layer includes a spun yarn B including a polypropylene fiber B having a water content of 0.15% by mass or more, which is a hydrophilized hydrophobic fiber, water easily diffuses. .

  In addition to one or more spun yarns selected from the group consisting of spun yarn A and spun yarn B, the front surface layer and / or the back surface layer may include other yarns. The other yarn 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. The other yarn may be composed of a hydrophilic fiber and / or a hydrophobic fiber.

  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. 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.

  In the case of using the hydrophobic fiber, it is preferable to use a hydrophilized hydrophobic fiber having a moisture content of 0.5% by mass or more and less than 5.0% by mass from the viewpoint of easily diffusing moisture. Examples of the hydrophilization treatment include corona discharge treatment, sulfonation treatment, graft polymerization treatment, kneading of the hydrophilizing agent into the fiber, and application by application, adhesion, exhaustion, etc. of the hydrophilizing agent and / or water absorbing agent. It is done. For example, as a hydrophilization treatment to a polyester fiber, the water-absorbing processing agent for polyester is subjected to the same bath processing in a dyeing step.

  Examples of the water-absorbing agent for polyester include, for example, a compound in which a side chain of polyethylene glycol is 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 Copolymerized polyester resin composed of terephthalic acid, adipic acid, 5-sulfoisophthalic acid, and polyethylene glycol; block copolymerized polyester resin composed of terephthalic acid and / or isophthalic acid, alkylene glycol, and polyalkylene glycol; Among the water-absorbing finishing agents for polyester, commercially available products include, for example, Nicepole PR-99 (manufactured by Nikka Chemical Co., Ltd.), Nicepole PRK-60 (manufactured by Nikka Chemical Co., Ltd.), Nicepole PR-86E (Nikka Chemical). SR1805M (manufactured by Takamatsu Yushi Co., Ltd.), Meika Finish SRM-65 (manufactured by Meisei Chemical Co., Ltd.) and the like. Examples of the water-absorbing processing agent for nylon include Nice Pol PRN (manufactured by Nikka Chemical Co., Ltd.).

  The degree of hydrophilicity of the hydrophilic hydrophobic fiber can be specified by the difference between the moisture content of the hydrophobic fiber after the hydrophilic treatment and the official moisture content of the hydrophobic fiber. The lower limit of the degree of hydrophilicity is preferably 0.1% by mass or more from the viewpoint of easily obtaining a predetermined liquid absorption force. More preferably, it is 0.2 mass% or more. The upper limit of the degree of hydrophilization is not particularly limited, but even if the degree of hydrophilization exceeds 1.0% by mass, the diffusibility of moisture hardly changes, and therefore it is preferably 1.0% by mass or less.

  Examples of the hydrophilic fibers include fibers having a moisture content of 5% by mass or more, for example, natural fibers such as pulp, cotton, hemp, silk and wool, regenerated cellulose fibers such as viscose rayon, cupra and solvent-spun cellulose fibers, and Examples include hydrophilic synthetic fibers. The hydrophilic fibers are more preferably scoured and bleached cellulose fibers from the viewpoint of easy water absorption and diffusion.

  In the other yarn, the hydrophilic fiber and / or the hydrophobic fiber preferably has a single fiber fineness of 0.5 to 3.5 dtex, and more preferably 0.6 to 2.5 dtex.

  The back layer preferably includes spun yarn B including polypropylene fiber B having a moisture content of 0.15% by mass or more. By constituting the back layer on the skin side with the spun yarn B including the polypropylene fiber B having a moisture content of 0.15% by mass or more, the anti-pilling property of the back layer is increased, and the lightweight property of the polypropylene fiber The water-absorbing quick-drying property of the fabric, particularly the water-absorbing quick-drying property after washing can be improved while utilizing the heat retaining property. From the viewpoint of anti-pilling property, lightness, heat retention, and quick-drying of water, the back layer preferably contains 50% by mass or more of spun yarn B, more preferably 75% by mass or more, and 85% by mass or more. More preferably, it is more preferably 95% by mass or more, and particularly preferably 100% by mass.

  When the other 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, it is 15-85S, More preferably, it is 20-80S. The 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 further preferably 0.6 to 2.5 dtex. preferable. The fiber length of the fibers constituting the spun yarn is preferably 24 to 75 mm.

  The spun yarn B constituting the back layer preferably contains 30% by mass or more, more preferably 50% by mass or more, and 70% by mass of the polypropylene fiber B from the viewpoints of lightness, heat retention and water-absorbing quick drying. It is more preferable to contain at least%. The spun yarn B constituting the back layer may be composed of only the polypropylene fiber B, or may contain other fibers. Polypropylene fiber B and other fibers may be combined by any method such as blended spinning, synthetic yarn, blended fiber, drawing, and 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 B, 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 these 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 B, polyester fiber, acrylic fiber, polyurethane fiber, and wool fiber, Polypropylene fiber other than polypropylene fiber B, polyurethane fiber And at least one selected from the group consisting of polyester fibers. By using a polypropylene fiber other than the polypropylene fiber B, 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 spun yarn B constituting the back layer may contain 70% by mass or less of other fibers depending on the purpose and the like. The spun yarn B constituting the back layer may contain 30% by mass or more of polypropylene fiber B and 70% by mass or less of polypropylene fiber other than polypropylene fiber B. From the viewpoint of lightness and heat retention, the spun yarn B constituting the back layer preferably contains 30% by mass or more, and more preferably contains 50% by mass or more of the polypropylene fibers B and other polypropylene fibers. preferable. Although the spun yarn B which comprises the said back surface layer is not specifically limited, For example, 30-70 mass% of polyester fibers may be included. Further, the spun yarn B constituting the back layer is not particularly limited, and may contain, for example, 1 to 10% by mass of polyurethane fiber.

  In one or more embodiments of the present invention, when the yarn constituting the back layer is composed of the spun yarn B including the polypropylene fiber B, the moisture content of the surface layer is 0.5% by mass or more and 5.0%. It is preferable that the yarn is composed of a yarn containing at least one fiber selected from the group consisting of hydrophobic fibers less than mass% and hydrophilic fibers having a moisture content of 5.0 mass% or more. The water-absorbing quick-drying property of the fabric and the water-absorbing quick-drying property after washing can be improved.

  In these embodiments, it is more preferable that the surface layer is composed of a thread containing a hydrophilic hydrophobic fiber from the viewpoint of easily diffusing moisture. The yarn constituting the surface layer preferably contains 30% by mass or more, more preferably 50% by mass or more, and more preferably at least one fiber selected from the group consisting of hydrophilic hydrophobic fibers and hydrophilic fibers. Preferably it contains 70 mass% or more. For example, when it is desired to obtain a dry feeling as the tactile sensation of the surface layer, it is preferable to use a polyester fiber as the hydrophilic hydrophobic fiber 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.

  In these embodiments, the yarn constituting the surface layer may be a spun yarn, a multifilament, or a monofilament, but is preferably a multifilament from the viewpoint of soft texture. In the yarn constituting the surface layer, the hydrophobic fiber and / or hydrophobic fiber preferably has a single fiber fineness of 0.4 to 20 dtex, more preferably 0.5 to 3.5 dtex, and 0 More preferably, it is 6 to 2.5 dtex.

  In these embodiments, the spun yarn B constituting the back surface layer is woven or knitted with the yarn constituting the front surface layer, and the spun yarn B constituting the back surface layer is exposed at least partially toward the front surface layer. It is preferable. Moisture transfer from the back surface layer, which is the skin contact surface, to the surface layer is quickened, and the water absorption and quick drying properties are enhanced.

  The fabric may be a knitted fabric having a multilayer structure of two or more layers, or a woven fabric having a multilayer structure of two or more layers. In the case of knitted fabrics, it may be a single-sided knitting or a deformed knitting plating or deer knitting that is made of different materials, and both sides are a double-sided smooth knitting, cardboard knitting, double-sided knitting, multi-faceted knitting One-sided honeycomb knitting and the like can be mentioned. In the case of a woven fabric, a double weave or a single weave includes satin weave, 3/1 twill weave, and the like. In particular, a knitted fabric having a two-layer structure composed of a double-sided knitted single-sided honeycomb structure is preferable. At this time, the honeycomb surface preferably constitutes the back surface layer.

  In addition, the fabric may be a sweat fabric excellent in heat retention, water absorption, and stretchability. In the sweat fabric, the back layer (lining) may be back hair or back brushed. . In the sweat fabric, when the surface layer is a flat knitting (stencil knitting) including one or more spun yarns selected from the group consisting of spun yarn A and spun yarn B, the anti-pilling property and the washing drying property are improved. When the sweat fabric is composed of a front yarn, a middle yarn and a back yarn, one or more spun yarns selected from the group consisting of the spun yarn A and the spun yarn B are used as the front yarn and the middle yarn. Thus, the anti-pilling property and the washing drying property are further improved.

  The fabric may be dyed after the refining process, and may be combined with water absorption processing, SR (Soil release) processing, antibacterial processing, antistatic processing, and the like during finishing processing.

The fabric can be manufactured, for example, by the following method.
<Production Method 1 of Fabric>
A step of preparing a thread containing hydrophobic fibers (also referred to as thread m);
Preparing the spun yarn B,
Producing a fabric by weaving or knitting so that the yarn m constitutes a surface layer and the spun yarn B constitutes a back layer;
In addition to at least one process selected from the group consisting of a scouring process and a dyeing process, the process includes a process of performing a water absorption process and processing the hydrophobic fibers constituting the surface layer so that the moisture content is 0.5% by mass or more. .

<Production Method 2 for Fabric>
Preparing a yarn containing hydrophilic fibers (also referred to as yarn n);
Preparing the spun yarn B,
Producing a fabric by weaving or knitting so that the yarn n constitutes a surface layer and the spun yarn B constitutes a back layer;
It includes a step of performing at least one processing selected from the group consisting of a scouring step, a bleaching step (only natural cellulose fibers such as cotton and hemp), a dyeing step, and a finishing step (flexible processing).

  The fabric preferably has a transpiration rate of 30% or more 20 minutes after the start of the test from the viewpoint of high water absorption and quick drying, in the transpiration (II) test (based on Boken standard BQE A 028). The transpiration (II) test is a test in which both water absorption and quick drying are evaluated in combination, and the transpiration rate is specifically measured as described later.

Alternatively, the fabric has a drying time (time to reach a transpiration rate of 100%) of 45 minutes measured according to ISO 17617 (2014) Determination of moisture drying rate (Method B-Horizontal drying) from the viewpoint of high water absorption and fast drying. The following is preferable.
ISO17617 has 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 immediately after dropping until the transpiration rate reaches 90%.
y = ax + b [y: transpiration rate (%), a: slope, x: time, b: intercept]
Calculate Drying time (time to reach 100% transpiration rate) from the numerical value obtained from the regression line.
Drying rate (% / min) = a
Drying time (100%) = (100-b) / a

  The fabric has a transpiration rate in the transpiration (I) test (based on Boken Standard BQE A 006) of 20% or more 30 minutes after the start of the test after washing 10 times from the viewpoint of high water absorption and quick drying after washing. Is preferred. The transpiration (II) test is a test in which both water absorption and quick drying are evaluated in combination, and the transpiration rate is specifically measured as described later.

  The fabric or the back surface layer and / or the surface layer of the fabric preferably has a pilling measured by using an ICI type tester based on JIS L 1076 A method of grade 3 or higher, and grade 3.5. More preferably, it is more preferably quaternary or higher.

  In one or more embodiments of the present invention, the fabric is a knitted fabric for clothing composed of a surface layer, a back surface layer, and a binding yarn connecting them, and is selected from the group consisting of a surface layer and a back surface layer. Preferably, one or more include one or more spun yarns selected from the group consisting of spun yarn A and spun yarn B. The knitted fabric for clothing includes one or more spun yarns selected from the group consisting of spun yarn A and spun yarn B, thereby increasing anti-pilling properties. From the viewpoint of further improving the anti-pilling property, it is preferable to contain 50% by mass or more of one or more spun yarns selected from the group consisting of spun yarn A and spun yarn B, more preferably 75% by mass or more, and 85% by mass. %, More preferably 95% by mass or more, still more preferably 100% by mass.

  In the knitted fabric for clothing, the surface layer and the back surface layer can have the same configuration as the surface layer and the back surface layer in the fabric including the surface layer and the back surface layer, respectively.

  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 fibers are not particularly limited, and examples thereof include polyester fibers, polyolefin fibers other than polypropylene fibers B, polyamide fibers, acrylic fibers, and vinyl chloride fibers. 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 knitted fabric for clothing is not particularly limited as long as it is a structure composed of a surface layer, a back layer (skin side), and a binding yarn connecting them, but the surface layer and the back layer are knitted with different structures, It is preferable that the back surface layer has a rough structure and the front surface layer has a dense structure. 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. More preferably, it is as follows.

  As for the back layer and / or the surface layer of the knitted fabric for clothing, the pilling measured using an ICI type tester is preferably grade 3 or higher, based on JIS L 1076 A method, and grade 3.5 or higher. More preferably, it is more preferably quaternary or higher.

In one or more embodiments of the present invention, the fabric is not particularly limited, but from the viewpoint of wearability such as lightness, for example, the basis weight is preferably 450 g / m ² or less, and is 400 g / m ² or less. Is more preferably 300 g / m ² or less, and particularly preferably 200 g / m ² or less. The fabric is not particularly limited, but preferably has a basis weight of 50 g / m ² or more from the viewpoint of heat retention and the like.

  The fabric is not particularly limited, but the thickness is preferably 4.0 mm or less, more preferably 3.5 mm or less, further preferably 2.5 mm or less, and 1.5 mm or less. It is particularly preferred. Moreover, although the said fabric is not specifically limited, It is preferable that thickness is 0.5 mm or more.

  The fabric can be used for clothing, industrial base materials, and the like. Examples of the clothing include underwear, underwear, shirts, jumpers, sweaters, pants, training wear, tights, stomachbands, mufflers, hats, gloves, socks, ear pads, and the like. As an industrial base material, a carpet, bedding, furniture, etc. are mentioned, for example.

  Hereinafter, it demonstrates using drawing. FIG. 1 is a partial perspective view of an example ring spinning machine used in an embodiment of the present invention.

  The two rovings 1a and 1b are supplied in parallel to the draft zone composed of 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) 2a and 2b 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) 10.

  When the spun yarn A is produced, the roving yarns 1a and 1b may both be the roving yarn A. Alternatively, one of the roving yarns 1a and 1b is the roving yarn A, and the other of the roving yarns 1a and 1b is adjusted so that the content of the polypropylene fiber A in the obtained spun yarn A is more than 50% by mass. The roving yarn may be used.

  When the spun yarn B is produced, the roving yarns 1a and 1b may all be the roving yarn B. Alternatively, one of the roving yarns 1a and 1b is the roving yarn B, and the other of the roving yarns 1a and 1b is adjusted so that the content of the polypropylene fiber B in the obtained spun yarn B is 5% by mass or more. The roving yarn may be used.

  FIG. 2 is a schematic explanatory view of an extruder used in one embodiment of the present invention. The extruder 201 includes a raw material supply port 202, a resin melting unit 203, a kneading and dispersing unit 204, a decompression line 205, an extruding unit 206, and a taking out unit 207. 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 202 of the resin melting portion 203. You may mix both before supply. Next, the mixture is fed to the kneading / dispersing unit 204, and a plurality of kneading plates are rotated in the kneading / dispersing unit 204. Here, the hydrophilic components dissolved in the polymer and water are uniformly mixed. Next, moisture is removed from the decompression line 205 in the state of water vapor. Next, the resin composition is extruded from the extruding portion 206, cooled, taken out from the taking out portion 207, and cut into a pellet-shaped resin composition (primary processing resin) if cut after cooling.

  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 under 230 degreeC and 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) Number of fuzz Measured according to JIS L 1095 (2010) 9.22.2 B method. A laser spot (model LST-V ++, manufactured by Keiki Kogyo Co., Ltd.) was used as a fluff tester, and the test conditions were a yarn speed of 50 m / min, a test length of 100 m, and N = 1.
(4) English cotton count JIS L 1095 (2010) Measured according to the cotton count measurement method of the positive tex / count measurement of general spun yarn of 9.4.1.
(5) Twist coefficient The number of twists was measured according to JIS L 1095 (2010) 9.15.1A method, and the twist coefficient was calculated by the following formula.
Twist factor = Number of twists per inch of yarn length / √ (6) Twist angle (a) Place the yarn in the horizontal direction and use a KEYENCE electron microscope VE-9800. Acquired.
(B) The middle point in the cross-section direction of the yarn was obtained at the left end and the right end of the obtained side image of the yarn, and the yarn axis was obtained by connecting the two points with a straight line. The obtained yarn axis was used as a reference line. For example, in FIG. 3, C and D are the midpoints in the cross-sectional direction of the left and right ends of the side image of the yarn, and Lb is a reference line.
(C) The twist angle was determined by measuring the acute angle between the reference line and the fiber on the twisted yarn surface. For example, in FIG. 3, the acute angle α formed by the reference line Lb and the fiber on the yarn surface is the twist angle.
(7) Porosity, apparent density
(I) Calculation of spun yarn diameter from side view of yarn
The side of the thread without tension was photographed with a VEENCE electron microscope VE-9800 (at a magnification of 40 to 100). As shown in FIG. 4, a tangent line is drawn in the longitudinal direction of the yarn with respect to the outermost fiber of the yarn (hereinafter referred to as the outermost end fiber) at an arbitrary position of the yarn, and the perpendicular to the tangent is the center of the yarn Lowered perpendicular to the axis (longitudinal direction). The perpendicular A and the intersection A of the outermost fibers constituting the yarn were used. Further, the intersection B of the outermost end fibers on the opposite side of the intersection A across the center axis of the yarn was set. The yarn diameter was measured from the distance between AB. Five images of different locations were taken for one sample. Five thread diameters were determined for each image and used as representative values for the image. Further, an average value of five images was obtained and used as a representative value of the yarn sample.
(II) Calculation of apparent density of spun yarn Using the spun yarn diameter measured in (I), the weight per unit length was calculated from the correct count (JIS L 1095 9.4.1 correct amount tex and count), The apparent density of the yarn was defined by dividing the weight per unit length by the volume calculated by approximating the cross section of the yarn to a circle. The smaller the apparent density, the larger the bulk per unit length of the yarn.
The cross section of the yarn was taken with a KEYENCE electron microscope VE-9800 at a magnification of 270x. In order to preserve the cross-sectional shape, it was embedded with epoxy and surfaced with a glass knife using a microtome (Leica EM UC6). Observation was carried out with a KEYENCE electron microscope VE-9800 (270x magnification).
(III) Porosity calculation method The volume Vm of a cylinder having the same specific gravity as the fiber material constituting an arbitrary yarn and the same weight as the yarn was calculated. Further, using the yarn diameter measured in (I), the yarn cross section was approximated to a circle, and the yarn volume Vy was calculated. Dividing Vm by Vy and multiplying by 100 gives the volume fraction of the fiber in the yarn. By subtracting this from 100, the porosity, which is the proportion of the air in the yarn, is derived. However, the fiber specific gravity described in JIS L 1096: 2010 8.11 apparent specific gravity and pore volume ratio was used for calculation.
(8) Pilling test Based on JIS L 1076 A method, a pilling test was performed using an ICI type testing machine, and the degree of pilling was confirmed.
(9) Fiber physical properties According to JIS L 1015, the single fiber strength and elongation were measured.
(10) Unit weight, thickness, and bulk density The unit weight and thickness were measured according to JIS L 1096 (2010). The bulk density was calculated based on the basis weight and thickness.
(11) Productivity of the spinning process Each process in the spinning process ((I) blended cotton, (II) card, (III) knit, (IV) roving, (V) fine spinning, (VI) wound yarn) The productivity was evaluated according to the following five-step criteria, and the average score was taken as the overall evaluation score.
5: Good 4: Almost good 3: Normal 2: Troubled 1: Production impossible (12) Fabric knitting The knitting property at the time of fabric production was evaluated according to the following five-step criteria.
5: Good 4: Almost good 3: Normal 2: Troubled 1: Production impossible (13) Water absorption 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 general incorporated foundation Boken Quality Evaluation Organization. The Boken general product standard is 30% or more. Specifically, the transpiration rate was measured and calculated by the following method.
(A) The mass (W) of a test piece having a diameter of about 9 cm and the petri dish was measured.
(B) 0.1 mL of water was dropped into the petri dish, a test piece was placed thereon, and the mass (W0) was measured.
(C) The sample was allowed to stand under standard conditions (20 ° C., 65% RH), the mass (Wt) was measured every predetermined time, and the transpiration rate (%) after 20 minutes was calculated.
Transpiration rate (%) = [(W0−Wt) / (W0−W)] × 100
(14) Water absorption 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. General product standards are 20% or more. Specifically, the transpiration rate was measured and calculated by the following method.
(A) The mass (W) of a test piece having a diameter of about 9 cm and a watch glass was measured.
(B) 1 mL of water was dropped onto a watch glass, a test piece was placed thereon, and the mass (W0) was measured.
(C) The sample was left under standard conditions (20 ° C., 65% RH), the mass (Wt) was measured every predetermined time, and the transpiration rate (%) was calculated per hour.
Transpiration rate (%) = [(W0−Wt) / (W0−W)] × 100
(15) Water absorption quick drying evaluation 3
Using an MMT (Moisture Management Tester), a water absorption quick-drying test was conducted according to AATCC ™ 195 (American Textile Chemistry and Dyeing Technology Association Standard) or GB / T21655.2 (Chinese Standard). Specifically, it is set in a sample (9 cm × 9 cm) apparatus, and test water (about 0.2 mL) is dropped on the water immersion surface (skin side surface, back layer) of the sample over 20 seconds, and the diffusion and penetration of this water The state to be performed was recorded for every elapsed time with a sensor inside the apparatus, and was completed in 120 seconds. Based on the following automatically calculated measurement items, 1- to 5-step evaluation of GB / T21655.2 (Chinese standard) described in Table 1 below, or AATCC TM 195 (US fibers described in Table 2 below) Evaluation was carried out based on a 1-5 grade evaluation of the Chemical Technology / Dyeing Technology Association Standard).
(16) Washing method The washing was performed according to JIS L 0217 103 method.
(17) Thermal insulation The thermal insulation rate was measured by 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.
(18) 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
(19) Water absorption JIS L 1907 The water absorption time was measured by a dropping method to evaluate water absorption. The shorter the water absorption time, the higher the water absorption.
(20) 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 202 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 203, the feed is fed forward along the rotation axis, and in the kneading and dispersing section 204, a plurality of kneading plates are rotating, where the base resin and the hydrophilic component are uniformly mixed, and then the decompression line 205 The water was removed at the same time by applying a vacuum (negative pressure).
(5) Next, the resin composition was extruded from the extrusion unit 206, cooled, and taken out from the takeout port 207.
(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 drawing machine, drawing, applying a conventional hydrophilic fiber treatment agent so that the adhesion amount is 0.15% by mass, applying crimp with a crimper, cutting, single fiber fineness Was about 1.8 dtex, and the fiber length was 38 mm, and a polypropylene fiber (hereinafter also referred to as hydrophilized PP fiber 1 (black)) was produced.

<Production Example 2 of Fiber>
(1) 100 parts by mass of polypropylene (MFR 20 g / 10 min) pellets (cylindrical shape having a diameter of 2 mm and a height of 2 mm) 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, stretching using a known stretching machine, the same hydrophilic fiber treatment agent as in Production Example 1 is applied so that the adhesion amount is 0.15% by mass, crimped by a crimper, cut, A polypropylene fiber having a single fiber fineness of about 1.8 dtex and a fiber length of 38 mm (hereinafter also referred to as regular PP fiber 1 (black)) was produced.

<Production Example 3 of Fiber>
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) are supplied from the raw material supply port of an extruder for melt spinning, and an extruder using a conventional melt spinning machine. After melt-kneading with, melt spinning was carried out. Then, stretching using a known stretching machine, the same hydrophilic fiber treatment agent as in Production Example 1 is applied so that the adhesion amount is 0.15% by mass, crimped by a crimper, cut, A polypropylene fiber having a single fiber fineness of about 1.3 dtex and a fiber length of 38 mm (hereinafter also referred to as regular PP fiber 2 (white)) was produced.

<Fiber production example 4>
(1) 100 parts by mass of polypropylene (MFR 20 g / 10 min) pellets (columnar shape having a diameter of 2 mm and a height of 2 mm) and 2 parts by mass of the master batch resin composition obtained in Production Example 1 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, stretching using a known stretching machine, the same hydrophilic fiber treatment agent as in Production Example 1 is applied so that the adhesion amount is 0.15% by mass, crimped by a crimper, cut, A polypropylene fiber having a single fiber fineness of about 1.9 dtex and a fiber length of 38 mm (hereinafter also referred to as hydrophilic PP fiber 2 (white)) was produced.

<Fiber production example 5>
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) are supplied from the raw material supply port of an extruder for melt spinning, and an extruder using a conventional melt spinning machine. After melt-kneading with, melt spinning was carried out. Then, stretching using a known stretching machine, the same hydrophilic fiber treatment agent as in Production Example 1 is applied so that the adhesion amount is 0.15% by mass, crimped by a crimper, cut, A polypropylene fiber having a single fiber fineness of about 1.24 dtex and a fiber length of 38 mm (hereinafter also referred to as regular PP fiber 3 (white)) was produced.

Example 1
The regular PP fiber 1 (black) obtained in Production Example 2 was sequentially added to the blended cotton process, the card process, the kneading process, and the roving process to obtain a roaring yarn of 50 gelen / 12 yd. Next, using the two roving yarns composed of 100% by mass of the obtained regular PP fiber 1 (black), a 40% draft was given by a ring spinning machine incorporating a compact spinning system, and the roving yarn was made with air. The fibers were sucked in the traveling direction to converge the fibers, and then twisted with a twisting coefficient of 3.6 to produce a spun yarn (silo compact yarn) of English cotton count 40s. Specifically, as shown in FIG. 1, two regular PP fibers 1 (black) 100% by mass of roving yarns 1a and 1b are passed through a guide bar 101 and a trumpet 102 through a back roller 103 and a middle roller. 104, apron 105, and front roller 106 are supplied in parallel to the draft zone, supplied to the twisted yarn zone while drafting in parallel, and two drafted rovings (fiber bundles) immediately after being supplied to the twisted zone 2a and 2b are sucked in the direction of the coarse yarn by air using a converging device including the air suction unit 107, the ventilation apron 108, the rotating roller 109, and the auxiliary roller 110 to converge the fibers, and then the snail wire 111 , Twisted yarns through the traveler 112 and the ring 113, and a spun yarn (silo compact) in which two fiber bundles are drawn and twisted ) Was obtained 10.

Using the spun yarn obtained above, a knitted fabric having a fabric weight of about 120 g / m ² was knitted using a 24 gauge flat knitting machine.

(Example 2)
The regular PP fiber 2 (white) obtained in Production Example 3 was sequentially added to the blended cotton process, the card process, the kneading process, and the roving process to obtain a roaring yarn of 50 gelen / 12 yd. A spun yarn (silo compact) in which two fiber bundles are drawn and twisted in the same manner as in Example 1 except that two roving yarns composed of 100% by mass of the obtained regular PP fiber 4 (white) are used. Thread). Using the obtained spun yarn, a knitted fabric having a tenacity structure having a basis weight of about 120 g / m ² was knitted in the same manner as in Example 1.

Example 3
The hydrophilized PP fiber 1 (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 50 gelen / 12 yd roving. A spun yarn (silo) in which two fiber bundles are aligned and twisted in the same manner as in Example 1, except that two roving yarns composed of 100% by mass of the obtained hydrophilic PP fiber 1 (black) are used. A compact yarn) was obtained. Using the obtained spun yarn, a knitted fabric having a tenacity structure having a basis weight of about 120 g / m ² was knitted in the same manner as in Example 1.

Example 4
8 parts by mass of the hydrophilized PP fiber 1 (black) obtained in Production Example 1 and 92 parts by mass of the regular PP fiber 2 (white) obtained in Production Example 3, a cotton-splitting process, a card process, a drawing process, The roving process was sequentially carried out to obtain 50 gelene / 12 yd roving. Two fiber bundles in the same manner as in Example 1 except that two roving yarns composed of 8% by mass of the obtained hydrophilic PP fiber 1 (black) and 92% by mass of regular PP fiber 2 (white) were used. As a result, a spun yarn (silo compact yarn) was obtained. Using the obtained spun yarn, a knitted fabric having a tenacity structure having a basis weight of about 120 g / m ² was knitted in the same manner as in Example 1. The obtained fabric contained 8% by mass of polypropylene fiber B, and the average fineness of polypropylene fiber B and other polypropylene fibers was 1.34 dtex.

(Example 5)
8 parts by mass of the hydrophilized PP fiber 1 (black) obtained in Production Example 1, 46 parts by mass of the hydrophilized PP fiber 2 (white) obtained in Production Example 4, and the regular PP fiber 3 obtained in Production Example 5 46 parts by weight of (white) were sequentially added to the cotton-blowing process, the carding process, the drawing process, and the roving process to obtain a roving of 50 gelen / 12yd. Except for using two roving yarns consisting of 8% by mass of the obtained hydrophilized PP fiber 1 (black), 46% by mass of hydrophilic PP fiber 2 (white), and 46% by mass of regular PP fiber 3 (white), In the same manner as in Example 1, a spun yarn (silo compact yarn) in which two fiber bundles were drawn and twisted was obtained. Using the obtained spun yarn, a knitted fabric having a tenacity structure having a basis weight of about 120 g / m ² was knitted in the same manner as in Example 1. The obtained fabric contained 54% by mass of the polypropylene fiber B, and the average fineness of the polypropylene fiber B and other polypropylene fibers was 1.59 dtex.

(Comparative Example 1)
The regular PP fiber 2 (white) obtained in Production Example 3 was 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 2 (white), a ring spinning machine provided a draft 36 times, twisted with a twist coefficient of 3.4, and an English cotton count of 40 s A spun yarn (ring yarn) was prepared. Using the obtained spun yarn, a knitted fabric having a tenacity structure having a basis weight of about 120 g / m ² was knitted in the same manner as in Example 1.

(Comparative Example 2)
The regular PP fiber 2 (white) obtained in Production Example 3 was sequentially added to the blended cotton process, the card process, the kneading process, and the roving process to obtain a 180 gelen / 6 yd roast. A single roving made of 100% by mass of the obtained regular PP fiber 2 (white) was used and spun by a VORTEX spinning machine to produce a spun yarn (MVS yarn) of English cotton count 40s. Using the spun yarn obtained, a knitted fabric with a tengu structure having a basis weight of about 120 g / m ² was knitted in the same manner as in Example 1.

(Comparative Example 3)
25 parts by mass of hydrophilized PP fiber 1 (black) obtained in Production Example 1 and 75 parts by mass of regular PP fiber 2 (white) obtained in Production Example 3, The roving process was sequentially carried out to obtain 50 gelene / 12 yd roving. Using two roving yarns composed of 25% by mass of the obtained hydrophilized PP fiber 1 (black) and 75% by mass of regular PP fiber 2 (white), a 40 times draft was given by a ring spinning machine, and the twist coefficient The yarn was twisted at 3.4 to produce a spun yarn (silo yarn) of English cotton count 40s. Using the spun yarn obtained, a knitted fabric with a tengu structure having a basis weight of about 120 g / m ² was knitted in the same manner as in Example 1.

(Comparative Example 4)
Commercially available regular polyethylene terephthalate fibers (single fiber fineness 1.3 dtex, fiber length 38 mm, hereinafter also referred to as “RPET fiber 1”) are sequentially added to the blended cotton process, card process, kneading process, roving process, A roving of 100 gelen / 12 yd was obtained. Using one roving made of 100% by mass of the obtained RPET fiber 1, using a ring spinning machine, giving a draft of 40 times, twisting with a twisting factor of 3.6, spun yarn of English cotton count 40s (Ring yarn) was produced. Using the spun yarn obtained, a knitted fabric with a tengu structure having a basis weight of about 120 g / m ² was knitted in the same manner as in Example 1.

(Comparative Example 5)
Commercially available regular polyethylene terephthalate fibers (single fiber fineness 0.9 dtex, fiber length 38 mm, hereinafter also referred to as “RPET fiber 2”) are sequentially added to the blended cotton process, card process, kneading process, roving process, A roving of 100 gelen / 12 yd was obtained. A spun yarn (silo-compact yarn) was obtained in the same manner as in Example 1 except that two roving yarns composed of 100% by mass of the obtained RPET fiber 2 were used. Using the spun yarn obtained, a knitted fabric with a tengu structure having a basis weight of about 120 g / m ² was knitted in the same manner as in Example 1.

(Comparative Example 6)
RPET fiber 1 (single fiber fineness 1.3 dtex, fiber length 38 mm) was sequentially added to the blended cotton process, the card process, the kneading process, and the roving process to obtain a roving of 50 gelen / 12 yd. A spun yarn (silo compact yarn) was obtained in the same manner as in Example 1 except that two roving yarns composed of 100% by mass of the obtained RPET fiber 1 were used. Using the spun yarn obtained, a knitted fabric with a tengu structure having a basis weight of about 120 g / m ² was knitted in the same manner as in Example 1.

  A pilling test was performed as described above using the knitted fabrics of Examples 1 to 5 and Comparative Examples 1 to 6, and the results are shown in Tables 3 and 4 below. Tables 3 and 4 below also show the results of the single fiber fineness and moisture content of the fibers, the English cotton count of the spun yarn, the twist coefficient, the number of fluffs, the apparent density, and the porosity. Tables 3 and 4 below also show the results of spinning process productivity and fabric knitting.

  As can be seen from the results in Tables 3 and 4 above, the fabrics using the spun yarn A or spun yarn B of the examples had pilling of grade 3 or higher and had anti-pilling properties. On the other hand, the fabric using the spun yarns of Comparative Examples 1 and 3 to 6 had a pilling of less than the third grade, and the anti-pilling property was inferior. The fabric using the spun yarn (MVS yarn) of Comparative Example 2 had pilling of grade 4 or higher and good anti-pilling properties, but the spun yarn productivity was poor. In particular, the spun yarn B had an average productivity of 4 or more in the spinning process. As can be seen from the comparison between Examples 1 to 4 and Example 5, the anti-pilling property becomes better when the twist angle is 27 ° or more.

(Example 6)
A spun yarn B (silo compact yarn) produced in the same manner as in Example 4 was used as the front yarn and the middle yarn.
Regular PP fiber (single fiber fineness 1.3dtex, fiber length 38mm) as a back thread was sequentially added to the blended cotton process, the card process, the kneading process, and the roving process to obtain a roasted yarn of 120 gelen / 12yd. English cotton count 12s, which was obtained by using a single roving made of 100% by mass of the regular PP fiber 2 (white) and giving a draft of 14.4 times with a ring spinning machine and twisting with a twist coefficient of 3.2. Of spun yarn (ring yarn) was used.
In accordance with the knitting structure chart shown in FIG. 5 and the conditions shown in Table 5, a 30-inch 18G gauge back hair single knitting machine is composed of a front yarn and a middle yarn on the surface, and the back yarn is the front yarn on the back surface. A double-layered knitted fabric (weight per unit area 271 g / m ² ) was knitted by constructing and knitting pile eyes while inserting into the two stitches. In the obtained knitted fabric, a raising finish was applied to the back yarn (pile) using a needle cloth raising machine. After the obtained knitted fabric was soaped, a finishing set was performed at 130 ° C. for 90 seconds using a tenter. In the obtained knitted fabric, the surface layer was tenjitsu knitting, and the back layer was brushed back.

(Example 7)
As the front yarn and the middle yarn, the spun yarn B (silo compact yarn) produced in the same manner as in Example 5 was used.
As the back yarn, an English cotton count 12s spun yarn (ring yarn) produced in the same manner as in Example 6 was used.
In accordance with the knitting structure chart shown in FIG. 5 and the conditions shown in Table 5, a 30-inch 11G gauge back-knitting single knitting machine is configured with a top yarn and a middle yarn on the surface, and the back yarn is the front yarn on the back side. A double-layered knitted fabric (weighing 339 g / m ² ) was knitted by constructing and knitting pile eyes while inserting into the two stitches. In the obtained knitted fabric, a raising finish was applied to the back yarn (pile) using a needle cloth raising machine. After the obtained knitted fabric was soaped, a finishing set was performed at 130 ° C. for 90 seconds using a tenter. In the obtained knitted fabric, the surface layer was tenjitsu knitting, and the back layer was brushed back.

(Example 8)
As the front yarn and the middle yarn, spun yarn B (silo compact yarn) produced in the same manner as in Example 3 was used.
Regular PP fibers (single fiber fineness of 1.9 dtex, fiber length of 38 mm) as the back yarn were sequentially added to the blended cotton process, the card process, the kneading process, and the roving process to obtain a roasted yarn of 120 gelen / 12yd. Using a single roving made of 100% by mass of the regular PP fiber, a spinning yarn of English cotton count 24s, which was given a draft of 28.8 times with a ring spinning machine and twisted at a twisting factor of 3.4 ( Ring yarn).
In accordance with the knitting structure chart shown in FIG. 5 and the conditions shown in Table 5, a 30-inch 11G gauge back-knitting single knitting machine is configured with a top yarn and a middle yarn on the surface, and the back yarn is the front yarn on the back side. A double-layered knitted fabric (weighing 296 g / m ² ) was knitted by constructing and knitting pile eyes while inserting into the two stitches. In the obtained knitted fabric, a raising finish was applied to the back yarn (pile) using a needle cloth raising machine. After the obtained knitted fabric was soaped, a finishing set was performed at 130 ° C. for 90 seconds using a tenter. In the obtained knitted fabric, the surface layer was tenjitsu knitting, and the back layer was brushed back.

(Comparative Example 7)
As the front yarn and the middle yarn, spun yarn (air-spun yarn) of English style cotton count 23s made of cotton was used.
As the back yarn, spun yarn (air-spun yarn) of English cotton count 16s made of cotton was used.
In accordance with the knitting structure chart shown in FIG. 5 and the conditions shown in Table 5, a 30-inch 16G gauge back-knitting single knitting machine is configured with a front yarn and a middle yarn on the surface, and a back yarn is used as the front yarn on the back surface. A double-layered knitted fabric (weighing 330 g / m ² ) was knitted by constructing and knitting pile eyes while being inserted into the two stitches. The obtained knitted fabric was subjected to raising finish on the back yarn (pile) using a needle cloth raising machine. After the obtained knitted fabric was soaped, a finishing set was performed at 130 ° C. for 90 seconds using a tenter. In the obtained knitted fabric, the surface layer was tenjitsu knitting, and the back layer was brushed back.

(Comparative Example 8)
As the front yarn and the middle yarn, spun yarn (air-spun yarn) of English cotton count 18s made of cotton was used.
As the back yarn, a spun yarn (ring yarn) of English cotton count 6s composed of 10% by mass of polyester and 90% by mass of cotton (cotton) was used.
In accordance with the knitting structure chart shown in FIG. 5 and the conditions shown in Table 5, a 30-inch 11G gauge back-knitting single knitting machine is composed of front and middle yarns on the surface, and the back side is the back yarn. A double-layered knitted fabric (weighing 330 g / m ² ) was knitted by constructing and knitting pile eyes while being inserted into the two stitches. The obtained knitted fabric was subjected to raising finish on the back yarn (pile) using a needle cloth raising machine. After the obtained knitted fabric was soaped, a finishing set was performed at 130 ° C. for 90 seconds using a tenter. In the obtained knitted fabric, the surface layer was tenjitsu knitting, and the back layer was brushed back.

  In the knitted fabrics of Examples 6 to 8, the surface layer was subjected to a pilling test as described above, and the results are shown in Table 5 below. Moreover, the heat retention property and the wash drying property of the knitted fabrics of Examples 6 to 8 and Comparative Examples 7 to 8 were measured as described above, and the results are shown in Table 5 below.

  As can be seen from Table 5 above, the knitted fabrics of Examples 6 to 8 had good anti-pilling properties. In addition, the knitted fabrics of Examples 6 to 8 in which the surface layer is composed of hydrophilic polypropylene fiber B having a moisture content of 0.15% by mass or more and the back surface layer is composed of hydrophobic polypropylene fiber are heat-retaining. In addition to excellent properties, washing and drying properties were good.

Example 9
A polyester multifilament (111 dtex, 144 filaments, single fiber fineness 0.77 dtex) was used as the surface layer yarn, and a spun yarn B produced in the same manner as in Example 3 was used as the back layer yarn in FIG. In accordance with the knitting structure shown, a double knit (weighing 179 g / m ² ) with a 34-inch 24 G gauge double-sided knitting machine with a surface having a sheet structure and a back surface having a honeycomb structure was knitted. The fiber mixing rate was 43% by mass of polyester fibers and 57% by mass of polypropylene fibers having a moisture content of 0.3% by mass. After scouring the resulting knitted fabric, a cationic dye and a water-absorbing agent for polyester (manufactured by Nikka Chemical Co., Ltd., trade name Nicepol PR-99) are dyed and absorbed in the same bath at 125 ° C. for 40 minutes, and then water-absorbing finish Went. The water content of the hydrophilized hydrophobic fiber (polyester fiber) is 0.7% by mass, and the degree of hydrophilization (the difference between the water content of the hydrophilized hydrophobic fiber and the official water content of the hydrophobic fiber) is 0. 0%. It was 3 mass%.

(Comparative Example 9)
Example 9 except that a ring yarn (hereinafter also referred to as PP ring yarn) composed of 100% by mass of regular PP fiber 2 (white) produced in the same manner as in Comparative Example 1 was used as the back layer yarn. A double knit (weighing 167 g / m ² ) was knitted in the same manner. The fiber mixing rate 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 9. The water content of the hydrophilized hydrophobic fiber (polyester fiber) is 0.7% by mass, and the degree of hydrophilization (the difference between the water content of the hydrophilized hydrophobic fiber and the official water content of the hydrophobic fiber) is 0. 0%. It was 3 mass%.

  In the knitted fabric of Example 9, a pilling test was performed on the back surface layer as described above, and the results are shown in Table 6 below. The water absorption quick-drying evaluation 1 of the knitted fabrics of Example 9 and Comparative Example 9 was performed, and the evaluation results (transpiration rate) are shown in Table 6 below. Table 6 below shows the evaluation results based on the water-absorbing quick-drying evaluation 2 at the initial stage of the knitted fabric of Example 9 and Comparative Example 9 and after 10 washings. Table 6 below also shows the basis weight and thickness of the knitted fabric. Table 6 shows the evaluation results of the water absorption quick drying evaluation 3 of the knitted fabrics of Example 9 and Comparative Example 9.

  As can be seen from the results in Table 6 above, the fabric of Example 9 had good anti-pilling properties. Moreover, the fabric of Example 9 had high transpiration. In particular, Example 9 was excellent in the transpiration rate of the transpiration (II) test. The reason why the fabric of Example 9 is excellent in transpiration is considered to be that water is smoothly transferred and moisture is transpired from the surface layer because the water absorption rate of the back layer (skin surface) in the MMT test is large. On the other hand, in Comparative Example 9, since the moisture content of the polypropylene fiber was 0.1% by mass, the wettability was extremely low and the transpiration rate was low. In the transpiration (I) test, the durability of water-absorbing quick-drying by washing was confirmed in the initial stage (no washing) and 10 washings of the fabric of Example 9. As a result, since the transpiration rate was the same for both initial and 10-time washing, it was confirmed that the laundry had durability.

(Example 10)
As yarns for the front surface layer and the back surface layer, a spun yarn B (hereinafter also referred to as “PP40”) obtained in the same manner as in Example 3, and a polyester multifilament (33 dtex, 24 filaments, hereinafter, “30d / 24F ”) and polyester monofilament (33.3 dtex, hereinafter also referred to as“ 30d / 1F ”) as the binding yarn, and the knitting structure diagrams (knitting diagrams) shown in FIGS. 7A and 7B And a cardboard knitted fabric (weight per unit area 281 g / m ² ) with a 34-inch 18 G-gauge double-sided knitting machine and having a front surface having a tense structure and a back surface having a honeycomb structure. The fiber mixing ratio was 69.8% by mass of the hydrophilized PP fiber 1 (black) and 30.2% by mass of the polyester fiber. After the obtained knitted fabric was soaped, a finishing set was performed at 130 ° C. for 90 seconds using a tenter.

(Example 11)
As yarns for the surface layer and the back layer, a spun yarn B (hereinafter also referred to as “PP40 (light gray wrinkle)”) obtained in the same manner as in Example 4 and a polyurethane fiber yarn (low temperature polyurethane elastic fiber, Nisshinbo Textile) “Mobilon MTR22-R”, 22 dtex (hereinafter also referred to as “Pu20d”) manufactured by the same company, polyester monofilament (30d / 1F) is used as the binding yarn, and the knitting structure shown in FIGS. 8A and 8B In accordance with the conditions shown in the figure (knitting diagram) and Table 8 below, a corrugated cardboard knitted fabric with a mesh structure on the back surface (basis weight of 387 g / m ² ) on a 34 inch 24 G gauge double-sided knitting machine. Organized. The fiber mixing ratio was 6.2% by mass for the hydrophilized PP fiber (black), 71.3% by mass for the regular PP fiber, 18.7% by mass for the polyester fiber, and 3.8% by 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 10)
As in Example 10, except that comb yarn (40th count, "CM40" in the following) and polyester multifilament (30d / 24F)) and polyester multifilament (30d / 24F) were used as the surface layer and back layer yarn, 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 9 below. The fiber mixing ratio was 67.3 mass% for cotton fibers and 32.7 mass% for polyester fibers. After the obtained knitted fabric was soaped, a finishing set was performed once at 90 ° C. for 90 seconds using a tenter.

(Comparative Example 11)
As the surface layer yarn, combed yarn (CM40) and polyurethane fiber yarn (Pu20d) are used together, and the back layer yarn is used in the same manner as in Comparative Example 1 to obtain 100% by mass of regular PP fiber 2 (white). In the same manner as in Example 11, except that the ring yarn (hereinafter also referred to as “PP40 / R”) and the polyurethane fiber yarn (Pu20d) are used in a uniform manner, the surface is a tense structure and the back surface is A mesh cardboard knitted fabric (weight per unit area 348 g / m ² ) was knitted. Specific knitting conditions are shown in Table 10 below. The fiber mixing ratio was 32.6% by mass for cotton, 44.9% by mass for regular PP fiber 2 (white), 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 12)
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. 9), and in accordance with the knitting structure diagram (knitting diagram) shown in FIG. 9 and the conditions shown in Table 11 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.

  In the knitted fabrics of Examples 10 and 11 and Comparative Examples 10 to 12, the surface layer and the back layer were subjected to a pilling test as described above, and the results are shown in Table 12 below. The thickness, bulk density, heat retention rate, wash drying property, water absorption and air permeability of Examples 10 and 11 and Comparative Examples 10 to 12 were measured as described above, and the results are shown in Table 12 below. Table 12 below also shows the course degree and the wal degree.

  As can be seen from the results in Table 12, the knitted fabrics of Examples 10 and 11 had good anti-pilling properties. In addition, the knitted fabrics of Examples 10 and 11 had high heat retention properties, as well as good lightness and washing drying properties.

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 12 using a multifilament, the thickness is the lowest even when the yarn feeding ratio is the highest as compared with Examples 10 and 11 and Comparative Examples 10-11. 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 10 and Comparative Example 10 have the same structure as that of the honeycomb structure on the front surface and the honeycomb structure on the back surface, and the knitted fabric in which the polyurethane is not disposed has good air permeability. However, in Example 10 in which the hydrophilic polypropylene fibers were arranged in both layers, the laundry drying property was particularly improved, and the drying rate after 90 minutes was twice that of Comparative Example 10.

1a, 1b Roving yarn 2a, 2b Drafted roving yarn (fiber bundle)
DESCRIPTION OF SYMBOLS 10 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 201 Extruder 202 Raw material supply port 203 Resin melting part 204 Kneading and dispersing unit 205 Decompression line 206 Extruding unit 207 Extracting unit

Claims (13)

A spun yarn containing more than 50% by mass of a polypropylene fiber having a moisture content measured according to JIS L 1015 (2010) of less than 0.15% by mass,
JIS L 1095 (2010) 9.22.2 The number of fluff having a length of 3 mm or more present per 10 m of the spun yarn measured according to the B method is 40/10 m or less,
The spun yarn has a porosity of 40 to 65% and a twist coefficient of 2.4 to 6.0. A spun yarn containing 5% by mass or more of polypropylene fiber,
The polypropylene fiber has a water content measured according to JIS L 1015 (2010) of 0.15% by mass or more,
JIS L 1095 (2010) 9.22.2 The number of fluff having a length of 3 mm or more present per 10 m of the spun yarn measured according to the B method is 40/10 m or less,
The spun yarn has a porosity of 40 to 65% and a twist coefficient of 2.4 to 6.0. A spun yarn containing more than 50% by mass of a polypropylene fiber having a moisture content measured according to JIS L 1015 (2010) of less than 0.15% by mass,
JIS L 1095 (2010) 9.22.2 The number of fluff having a length of 3 mm or more present per 10 m of the spun yarn measured according to the B method is 40/10 m or less,
The spun yarn is characterized in that a twist angle is 23 ° or more. A spun yarn containing 5% by mass or more of polypropylene fiber,
The polypropylene fiber has a water content measured according to JIS L 1015 (2010) of 0.15% by mass or more,
JIS L 1095 (2010) 9.22.2 The number of fluff having a length of 3 mm or more present per 10 m of the spun yarn measured according to the B method is 40/10 m or less,
The spun yarn is characterized in that a twist angle is 23 ° or more.   The spun yarn according to claim 1 or 2, wherein the spun yarn has a twist angle of 23 ° or more.   The spun yarn according to any one of claims 1 to 5, wherein the spun yarn is a twisted yarn composed of two fiber bundles.   The spun yarn according to claim 2, 4 or 5, 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.   The spun yarn according to claim 7, wherein the hydrophilic component includes a nonionic surfactant. A method for producing a spun yarn according to claim 1 or 3,
In ring spinning,
A step of preparing a roving yarn A containing more than 50% by mass of a polypropylene fiber having a moisture content of less than 0.15% by mass measured according to at least one JIS L 1015 (2010);
Supplying the two rovings including at least one roving A to the draft zone, drafting, and supplying to the twisting zone while drawing, and the two rovings immediately after being supplied to the twisting zone to the air A method of producing a spun yarn, comprising the step of twisting after sucking in the advancing direction of the roving yarn to converge the fiber. A method for producing a spun yarn according to claim 2 or 4,
In ring spinning,
A step of preparing a roving yarn B containing at least 5% by mass of at least one polypropylene fiber,
Supplying the two rovings including at least one roving B to the draft zone, drafting, and supplying the two rovings to the twisting zone while drawing, and the two rovings immediately after being supplied to the twisting zone to the air Including the step of twisting after the fibers are attracted by sucking in the traveling direction of the roving yarn,
The polypropylene fiber has a moisture content measured according to JIS L 1015 (2010) of 0.15% by mass or more, and a method for producing a spun yarn.   A fabric comprising the spun yarn according to any one of claims 1 to 8.   The fabric includes a front surface layer and a back surface layer, and at least one layer selected from the group consisting of the front surface layer and the back surface layer includes the spun yarn according to any one of claims 1 to 8. The fabric described.   The fabric is a knitted fabric for clothing composed of a front surface layer, a back surface layer, and a binding yarn connecting them, and one or more layers selected from the group consisting of the front surface layer and the back surface layer are claims 1 to 8. The fabric according to claim 11, comprising the spun yarn according to claim 1.