WO2019009237A1

WO2019009237A1 - Yarn, fiber product, and manufacturing method

Info

Publication number: WO2019009237A1
Application number: PCT/JP2018/025038
Authority: WO
Inventors: 修大西
Original assignee: 岡本株式会社
Priority date: 2017-07-06
Filing date: 2018-07-02
Publication date: 2019-01-10

Abstract

The purpose of the present invention is to improve air permeability and moisture permeability for yarn and a fiber product provided with antifouling properties. The surface of a fluorine resin porous membrane (10) is provided with water repellent properties, and the average pore diameter in the fluorine resin porous membrane (10) is 0.1 – 10 µm. Thus, slit yarn obtained by slitting the fluorine resin porous membrane (10) is provided with excellent antifouling properties as well as excellent air permeability and moisture permeability.

Description

Yarn, textile products and manufacturing method

The present invention relates to a yarn and a fiber product, and a method of manufacturing the same, and more particularly to a yarn and a fiber product in which a fluorine resin is used, and a method of manufacturing the same.

It is known that a fluorine resin represented by polytetrafluoroethylene (PTFE, polytetrafluoroethylene) is excellent in various properties such as water repellency, oil repellency, and chemical resistance. For this reason, fluororesins are used in various fields.

One of the fields in which fluoroplastics are used is the filter field. The fluororesin is rendered porous by drawing (specifically, it changes to have a microporous structure consisting of a large number of nodules and a large number of fibers connecting the nodules). Such a porous fluororesin is suitable for a filter, and a fluororesin porous membrane corresponding to various uses of the filter has been developed. For example, Patent Document 1 discloses a hydrophilic porous PTFE membrane. Also, for example, Patent Document 2 discloses a PTFE porous membrane in which the orientation direction of the fiber differs between the surface portion and the inside. Further, for example, Patent Document 3 discloses an oil repellent-treated porous PTFE membrane.

The textile field is also one of the fields in which fluoroplastics are used. For example, Patent Document 4 discloses a method of producing a PTFE long fiber. Also, for example, Patent Document 5 discloses a method of producing a PTFE hollow fiber.

Japanese Patent Publication "Japanese Patent Application Laid-Open No. 5-131121 (May 28, 1993)" Japanese Patent Publication "Japanese Patent Application Laid-Open No. 6-256549 (September 13, 1994)" Japanese Patent Publication No. 2012-236188 (disclosed on December 6, 2012) Japanese Patent Publication "Japanese Patent Application Laid-Open No. 2008-266806 (released on November 6, 2008)" Japanese Patent Publication "Japanese Unexamined Patent Publication No. 2010-47859 (released on March 4, 2010)"

However, conventionally, yarn having antifouling properties such as fluorocarbon resin fibers has a problem that air permeability and moisture permeability are low. In addition, various porous membranes developed in the filter field are used by being stuck to a support such as non-woven fabric because of insufficient strength and the like. For this reason, porous membranes in the filter field have not been applied to the fiber field requiring mechanical strength.

One aspect of the present invention is directed to improving air permeability and moisture permeability of yarn and fiber products having antifouling properties.

In order to solve the above-mentioned subject, the yarn concerning one mode of the present invention contains the porous slit yarn in which the porous membrane was slit, the surface of the above-mentioned porous slit yarn has water repellency, and the above-mentioned porous The average pore diameter of the slit yarn is in the range of 0.1 μm to 10 μm.

In order to solve said subject, the manufacturing method of the yarn concerning another mode of the present invention slits the porous film whose surface is equipped with water repellency and whose average pore diameter is 0.1 micrometer or more and 10 micrometers or less Manufacturing method including the following steps.

According to one aspect of the present invention, the yarn and the textile having antifouling properties are improved in air permeability and moisture permeability.

(A) of FIG. 1 is a figure which shows the surface imaged with the scanning electron microscope of the fluororesin porous membrane which concerns on the some aspect of this invention. (B) of FIG. 1 is an enlarged view of (a) of FIG. (C) of FIG. 1 is a fragmentary sectional view which shows typically schematic structure and functionality of the fluororesin porous membrane shown to (a) and (b) of FIG. It is a top view which shows roughly the slit process of slitting the fluororesin porous membrane shown in FIG. 1, and manufacturing a fluororesin porous slit thread | yarn. It is sectional drawing which shows roughly some examples of the slit process which slits the fluorine resin porous membrane shown in FIG. 1, and manufactures a fluorine resin porous slit thread | yarn. FIG. 1 shows an example of a textile according to some embodiments of the present invention. (A) A fluororesin porous slit yarn shown in FIG. 2, (b) a composite yarn covering the fluororesin porous slit yarn, (c) another composite yarn covered with the fluororesin porous slit yarn, (d FIG. 6 is a view showing a schematic configuration of a combined twisting yarn obtained by combining a plurality of the porous fluororesin porous slit yarns and (e) yet another composite yarn covered with the porous fluororesin porous slit yarn.

Embodiment 1
Hereinafter, an embodiment of the present invention will be described in detail.

(Fluororesin porous membrane)
(A) of FIG. 1 is a figure which shows the surface imaged with the scanning electron microscope (SEM, scanning electron microscope) of the fluorine resin porous membrane 10 which concerns on some aspects of this invention. (B) of FIG. 1 is an enlarged view of (a) of FIG. (C) of FIG. 1 is a fragmentary sectional view which shows typically schematic structure and functionality (water resistance and moisture permeability) of the fluororesin porous membrane 10 shown to (a) and (b) of FIG. .

As shown in FIG. 1, the fluororesin porous membrane 10 has a microporous structure consisting of a large number of nodules and a large number of fibers connecting the nodules. The average pore diameter of the fluororesin porous membrane 10 is 0.1 μm to 10 μm. Such a fluorine resin porous membrane 10 having an average pore diameter of 0.1 μm to 10 μm is commercially available from Nitto Denko Corporation (Osaka Prefecture, Japan) under the trademark such as TEMISH (registered trademark) for use as a ventilation filter. ing.

Description of the specific configuration and manufacturing method of the fluororesin porous membrane will be omitted because various configurations and manufacturing methods are well known. The fluororesin porous membrane 10 used in the embodiment of the present invention may have any configuration as long as the average pore diameter is 0.1 μm to 10 μm, and may be manufactured by any manufacturing method. .

(pore)
Since the surface of the fluorine resin has water repellency, when the average pore diameter of the fluorine resin porous film 10 is 10 μm or less, water in a liquid state (for example, water mixed with other substances such as sweat and rain) is used. The penetration of (including) into the pores is inhibited by the surface tension of water. Since the surface of the fluororesin also has oil repellency, when the average pore diameter of the fluororesin porous membrane 10 is 10 μm or less, the oil in the liquid state (eg, oil mixed with other substances such as sebum or dressing) Penetration of (including) into the pores is also inhibited by the surface tension of fats and oils. Therefore, regardless of whether the contamination is hydrophilic or oleophilic, the contamination of the liquid stops outside the pores of the fluororesin porous membrane 10 as in the water droplet 60 of FIG. 1 (c). Also, most dust (including, for example, small solids such as cotton, cotton dust, pollen etc.) is larger than 10 μm. Therefore, when the average pore size of the fluororesin porous membrane 10 is 10 μm or less, most dusts are larger than the average pore size, and therefore, can not enter into the pores. For this reason, solid dirt also stays outside the pores of the porous fluororesin membrane 10. Furthermore, since the fluorocarbon resin is excellent in chemical stability, dirt does not adhere to the surface of the fluorocarbon resin porous membrane 10 regardless of the state of solid, liquid or gas.

Therefore, the fluororesin porous membrane 10 has good waterproofness, oil resistance, and dust releasability, and the dirt may cause the fluororesin porous membrane 10 to vibrate or impact the fluororesin porous membrane 10. , Etc., it is easily removed from the fluororesin porous membrane 10. As described above, since the fluororesin porous membrane 10 is excellent in antifouling property, cleanliness can be maintained only by tapping without washing or washing with a detergent. Furthermore, since the fluorocarbon resin is excellent in chemical resistance, the fluorocarbon resin porous membrane 10 maintains good waterproofness, oil resistance, dust releasability, and antifouling property even when washing with a detergent. be able to.

On the other hand, since air and water vapor in the gaseous state have no surface tension, when the average pore diameter of the fluororesin porous membrane 10 is 0.1 μm or more, the air and water vapor are the water vapor 70 in FIG. Thus, the pores of the fluorocarbon resin porous membrane 10 can be easily passed through. Therefore, the fluororesin porous membrane 10 has good air permeability and moisture permeability. Furthermore, since the fluorocarbon resin porous membrane 10 has antifouling properties, the substance constituting the dirt hardly blocks or narrows the pores of the fluorocarbon resin porous membrane 10. Therefore, the fluororesin porous membrane 10 can easily maintain good air permeability and moisture permeability. Even if the average pore size of the pores is less than 0.1 μm, the passage speed is slow, but air and water vapor which are in the gaseous state can pass through the pores of the porous fluororesin membrane 10.

Furthermore, since the fluororesin porous membrane 10 can hold air and water vapor in its pores, it is also excellent in heat retention and moisture absorption and release. Moreover, since the fluororesin porous membrane 10 is porous, it is bulky and light relative to its volume.

(Fiber diameter)
As for the average diameter (average fiber diameter) of the fiber which comprises the fluororesin porous membrane 10, 0.5 micrometer or less is preferable. This is because when the average fiber diameter is 0.5 μm or less, it is easy to set the average pore diameter to 0.1 μm or more and 10 μm or less.

(Thickness)
The thickness of the fluororesin porous membrane 10 is preferably 80 μm or less. The reason is that when the fluororesin porous membrane 10 is thicker than 80 μm, the fluororesin porous slit yarn 1 obtained by slitting the fluororesin porous membrane 10 is not so flexible, so it is difficult to process it into a fiber product. For example, it is difficult to weave the

composite yarns

2, 3, 5 or the combined twisted yarn 4 including (i) the fluororesin porous slit yarn 1 or (ii) the fluororesin porous slit yarn 1 in the woven fabric.

(Oil-repellent treatment)
It is preferable that the surface of the fluororesin porous membrane 10 is coated with an oil repellent agent, including the wall surfaces of the pores. The reason is that the oil repellency treatment of coating with the oil repellent agent improves the oil resistance of the fluororesin porous membrane 10, and thus the antifouling property of the fluororesin porous membrane 10 is enhanced. The oil repellent agent may be any oil repellent agent used for oil repellent treatment of a fluorine resin. Generally, a fluorine-containing polymer having a linear perfluorinated alkyl group (Rf group) having 8 or more carbon atoms is known to be suitable for imparting oil repellency. For this reason, a general oil repellent agent contains a fluorine-containing polymer having a carbon number of 8 or more and an Rf group.

(Fluororesin)
The fluorine resin constituting the fluorine resin porous membrane 10 is typically polytetrafluoroethylene (PTFE, polytetrafluoroethylene). Not limited to this, the fluorocarbon resin constituting the fluorocarbon resin porous membrane 10 is another fluorocarbon resin, for example, tetrafluoroethylene-hexafluoropropylene copolymer, ethylene-tetrafluoroethylene copolymer, vinyl fluoride resin, It may be a vinylidene fluoride resin, a trifluorinated chlorinated ethylene resin, or the like, or a mixture of a plurality of fluorine resins.

A porous membrane made of a material other than the fluorocarbon resin may be used instead of the porous fluororesin membrane 10 as long as the surface and the cross section thereof have water repellency. Moreover, it is preferable that the porous membrane used instead of the fluororesin porous membrane 10 also equips the surface and its cross section oil repellency. The reason is that the porous film used in place of the fluororesin porous film has better antifouling property in the case of including oil repellency than in the case of not including oil repellency.

(Fluororesin porous slit yarn)
FIG. 2 is a plan view schematically showing a slitting step of slitting the fluororesin porous membrane 10 shown in FIG. 1 to produce the fluororesin porous slit yarn 1. FIG. 3 is a cross-sectional view schematically showing several examples of the slitting step of slitting the porous fluororesin porous membrane 10 shown in FIG. 1 to produce the porous porous resin slit yarn 1.

As shown in FIG. 2, the fluororesin porous membrane 10 is slit to a desired width by the slit blade 20 and divided into a plurality of fluororesin porous slit yarns 1. It is preferable that the fluororesin porous membrane 10 be slit such that the fluororesin porous slit yarn 1 has an irregular cross-sectional shape. For example, as shown in FIG. 3, even if the cross-sectional shape of the porous fluororesin porous slit yarn 1 in a cross section orthogonal to the lengthwise direction of the porous fluororesin porous slit yarn 1 is approximately triangular and approximately rectangular, Good. For example, although illustration is omitted, the cross-sectional shape of the fluororesin porous slit yarn 1 may be a cross-sectional shape having a convex portion, for example, a substantially star shape. In this way, by slitting into the irregular cross-sectional shape, the texture (strain, strength, slip, swelling, squeezing, squeezing, suppleness, softness, etc.) of the fluororesin porous slit yarn 1 is improved.

The fluororesin porous slit yarn 1 may be used as it is (that is, not twisted), woven into a woven fabric, knitted into a knitted fabric, or assembled into a cord, or the like. Alternatively, although not shown, the fluororesin porous slit yarn 1 may be twisted alone and woven into a woven fabric, knitted into a knitted fabric, or assembled into a string, or the like.

The surface of the fluororesin porous slit yarn 1 is provided with water repellency and oil repellency like the surface of the fluororesin porous membrane 10. Further, the pores of the fluororesin porous slit yarn 1 have an average pore diameter of 0.1 μm to 10 μm, similarly to the pores of the fluororesin porous membrane 10. For this reason, like the fluororesin porous film 10, the fluororesin porous slit yarn 1 is favorably provided with waterproofness, oil resistance, dust releasability, soil resistance, air permeability and moisture permeability. For this reason, the fiber product in which the fluororesin porous slit yarn 1 and the fluororesin porous slit yarn 1 are used can be used for applications requiring air permeability and / or moisture permeability. In particular, the fiber products in which the fluororesin porous slit yarn 1 is used are required to have air permeability and / or moisture permeability, in particular, along with any one or more of waterproofness, oil resistance, dust releasability and antifouling properties. Suitable for use in the For example, knitted fabrics and woven fabrics in which the fluororesin porous slit yarn 1 is knitted are suitable for use in medical articles, shoes, and clothing articles such as underwear and raincoats.

FIG. 4 is a diagram showing an example of a fiber product according to some embodiments of the present invention. As shown in FIG. 4 (a), a sock 6 knitted by using the fluororesin porous slit yarn 1 as a base yarn is suitable for a deep vein thrombosis (DVT) preventive sock. As shown in (b) of FIG. 4, a knitted fabric and a woven fabric obtained by knitting the fluororesin porous slit yarn 1 are suitable for the fabric portion 82 of the upper of the shoe 80 (shoe).

Furthermore, like the fluororesin porous membrane 10, the fluororesin porous slit yarn 1 is also excellent in heat retention and moisture absorption and release, and is bulky and light. For this reason, the fiber product in which the fluororesin porous slit yarn 1 is used is excellent in comfort.

The oil repellent treatment described above may be performed after slitting the fluororesin porous membrane 10 into the fluororesin porous slit yarn 1. When the oil repellent treatment is performed before the slit, a portion which is a slit cross section of the fluororesin porous membrane 10 is not coated with the oil repellent agent on each surface of the fluororesin porous slit yarn 1. On the other hand, when the oil repellent treatment is performed after the slitting, the entire surface of the fluororesin porous slit yarn 1 is coated with the oil repellent agent. Therefore, from the viewpoint of functionality, it is preferable to perform the oil repellent treatment after the slitting.

However, when the oil repellent treatment is performed after the slitting, the processing efficiency of the oil repellent treatment is lower than when the oil repellent treatment is performed before the slitting. Further, the porous fluororesin porous slit yarn 1 is more easily broken than the porous fluororesin porous membrane 10. Therefore, from the viewpoint of production efficiency, if it is acceptable that a part of the surface of the porous fluororesin porous slit yarn 1 is not covered with the oil repellent agent, it is preferable to perform the oil repellent treatment before the slitting.

Second Embodiment
Hereinafter, another embodiment of the present invention will be described based on FIG. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended and the description is abbreviate | omitted.

FIG. 5 shows (a) the fluororesin porous slit yarn 1 shown in FIG. 2, (b) the composite yarn 2 covered with the fluororesin porous slit yarn 1 with the covering yarn 30, (c) the fluororesin porous slit yarn (1) another composite yarn 3 covered with a covering slit yarn 40, (d) a composite yarn 4 in which a plurality of fluorine resin porous slit yarns 1 are twisted and twisted, and (e) a core yarn 50 by a fluorine resin porous slit yarn 1. Is a diagram showing a schematic configuration of still another composite yarn 5 covered with.

As described in the above-mentioned Embodiment 1, the fluororesin porous slit yarn 1 may be processed into a fiber product without being twisted or being twisted alone. However, the non-twisted or single-twisted fluororesin porous slit yarn 1 has low mechanical strength. For this reason, it is preferable to be twisted, covered or covered.

The "composite yarn" in the present specification means a yarn composed of a core part (inner part) and a sheath part (outer part), and the core part and the sheath part composed of different yarns. The yarn constituting the core portion of the composite yarn is referred to as "core yarn", and the yarn constituting the sheath portion is referred to as "covering yarn". Also, "covering" means covering the core yarn with the covering yarn by a method such as winding or knitting the covering yarn around the core yarn. In addition, core yarn and covering yarn may be the same kind of material, all of which have the same characteristics even if they are different kinds of yarns such as material, fiber diameter, specific gravity, cross-sectional structure, and twisting characteristics. It may be a yarn.

Among the coverings, covering the core yarn by helically winding the covering yarn around the core yarn as shown in (c) and (d) of FIG. 5 is referred to as “wrapping covering”. Also, as shown in FIG. 5 (b), covering the core yarn by knitting covering yarn around the core yarn is referred to as "knit covering". The knitting (knitting) of the covering yarn in the knit covering is mainly warp knitting, but not limited to this, for example, it may be weft knitting.

In the present specification, “blending” means twisting a plurality of yarns, and a yarn made by blending is referred to as a blended yarn. Specifically, a single-twisted yarn in which a plurality of non-twisted yarns are aligned and twisted in one of the left and right directions and a plurality of single-twisted yarns are twisted together in the opposite direction to the single-twist. The combined ply yarn etc. are mentioned.

(Composite yarns that use fluoroplastic porous slit yarns as core yarns)
For example, as shown in (b) of FIG. 5, covering yarn 30 is knitted around the fluororesin porous slit yarn 1 with the fluororesin porous slit yarn 1 as the core yarn, and the fluororesin porous slit yarn 1 is produced. It is preferable that the covering yarn 30 knit cover. In such a composite yarn 2, fuzzing of the fluororesin porous slit yarn 1 is prevented. Further, since the fluororesin porous slit yarn 1 is reinforced by the covering yarn 30, the strength of the composite yarn 2 is improved more than the strength of the fluororesin porous slit yarn 1.

(Covering yarn)
The covering yarn 30 preferably has antifouling properties. This is because if the covering yarn 30 does not have antifouling properties, the entire composite yarn 2 does not have antifouling properties, whereas, if the covering yarn 30 has antifouling properties, the entire composite yarn 2 is prevented. It is because it has dirtiness. Similarly, the covering yarn 30 is preferably provided with waterproofness, oil resistance and dust releasability.

The covering yarn 30 may not have breathability and moisture permeability. This is because, even if the covering yarn 30 does not have air permeability and moisture permeability, the entire composite yarn 2 has air permeability and moisture permeability because the fluororesin porous slit yarn 1 has air permeability and moisture permeability. .

Fibers that are waterproof, oil resistant, dust releasable, and soil resistant, but not breathable and moisture permeable are, for example, silicone fibers, conventional fluorocarbon fibers, and carbon fibers.

The covering yarn 30 may be a filament yarn, a spun yarn or a slit yarn.

(Another composite yarn having a fluororesin porous slit yarn as a core yarn)
Alternatively, for example, as shown in (c) of FIG. 5, covering slit yarn 40 is spirally wound around fluorine resin porous slit yarn 1 with fluorine resin porous slit yarn 1 as the core yarn, and fluorine resin It is also preferable that a covering yarn 30 be wound around and cover the porous slit yarn 1. In such a composite yarn 3, fuzzing of the fluororesin porous slit yarn 1 is prevented. Further, since the fluororesin porous slit yarn 1 is reinforced by the covering slit yarn 40, the strength of the composite yarn 3 is improved more than the strength of the fluororesin porous slit yarn 1.

Similar to the covering yarn 30 described above, the covering slit yarn 40 preferably has waterproofness, oil resistance, dust releasability, and stain resistance. Also, the covering slit yarn 40 may not have breathability and moisture permeability, as the covering yarn 30 described above. Also, covering yarns that are not slit yarns may be covered by covering the porous fluororesin porous slit yarn 1.

(Combined yarn of fluoroplastic porous slit yarn)
Alternatively, for example, as shown in (d) of FIG. 5, it is also preferable to align and twist the plurality of fluororesin porous slit yarns 1. The strength of such a plied yarn 4 is better than the strength of the non-twisted or single-twisted fluororesin porous slit yarn 1.

(Still another composite yarn with covering yarn made of fluorocarbon resin porous slit)
Alternatively, for example, as shown in (e) of FIG. 5, the fluorine resin porous slit yarn 1 is spirally wound around the core yarn 50 with the fluorine resin porous slit yarn 1 as a covering yarn, It is also preferred that the porous resin porous slit yarn 1 be wound and covered. The strength of such a composite yarn 5 is improved more than the strength of the fluororesin porous slit yarn 1. Further, in the composite yarn 5, the core yarn 50 mainly bears the tension and the fluororesin porous slit yarn 1 can hardly bear the tension, so that the air permeability of the fluororesin porous slit yarn 1 can be increased. It can be easily enhanced.

Similarly to the covering yarn 30 described above, the core yarn 50 is also preferably provided with waterproofness, oil resistance, dust releasability, and stain resistance. Also, the core yarn 50 may not have air permeability and moisture permeability, as with the covering yarn 30 described above. The core yarn 50 may be a filament yarn, a spun yarn or a slit yarn.

(Other composite yarns containing fluoroplastic porous slit yarn)
The composite yarn containing the fluororesin porous slit yarn may have a structure other than the structure shown in FIG.

For example, the layer of covering yarn which covers a core yarn may be multiple layers. Also, for example, the porous fluororesin slit wire 1 may be knitted by warp knitting or weft knitting around the core yarn 50, and the core yarn 50 may be knit covered with the porous fluororesin slit yarn 1. Also, for example, in one composite yarn, the fluororesin porous slit yarn 1 may be used for both the core yarn and the covering yarn. Specifically, (i) the non-twisted fluorine resin porous slit yarn 1 is wound and covered, or (ii) the plurality of fluorine resin porous slit yarns 1 are combined. Another twisted composite yarn 4 may be knit covered or the twisted composite yarn 4 may be covered.

(Fiber products)

Composite yarns

2, 3 and 5 including the fluorine resin porous slit yarn 1, a composite yarn including the fluorine resin porous slit yarn 1 of another structure, and a combined yarn 4 in which the fluorine resin porous slit yarn 1 is twisted. The same as the fluororesin porous slit yarn 1 can be used.

The composite yarn including

composite yarns

2, 3, and 5 and the other fluororesin porous slit yarn 1, and the composite yarn 4 and the fiber product in which at least any one of these is used is a fluororesin porous slit. As with the textiles in which the yarn 1 and the fluororesin porous slit yarn 1 are used, it can be used for applications where air permeability and / or moisture permeability is required. For example, a knitted fabric and a woven fabric using at least one of the

composite yarn

2, 3, 5, the other composite yarn including the fluororesin porous slit yarn 1, and the double-twisted yarn 4 are medical products , Shoes, and clothing items such as underwear and raincoats.

[Summary]
The yarn (1 to 5) according to the first aspect of the present invention includes a porous slit yarn (1) in which the porous membrane (10) is slit, and the surface of the porous slit yarn (1) is repellent The porous slit yarn (1) is aqueous, and has an average pore diameter of 0.1 μm to 10 μm.

According to the above configuration, the surface of the porous slit yarn has water repellency, and the average pore diameter of the porous slit yarn is 10 μm or less. For this reason, water which is in a liquid state is inhibited by surface tension from entering the pores of the porous slit yarn. Also, most debris can not penetrate into the pores of the porous slit yarn. Thus, the porous slit yarn has good waterproofness and dust releasability. Thus, the porous slit yarn has good stain resistance which can be maintained clean without washing with detergent.

According to the above configuration, the average pore diameter of the porous slit yarn is 0.1 μm or more. Air and water vapor, which are in a gaseous state, can easily pass through the pores of the porous slit yarn because there is no surface tension. Because of this, the porous slit yarn also has good breathability and moisture permeability.

According to the above configuration, the porous slit yarn can hold air and water vapor in the pores. For this reason, the porous slit yarn also has good heat retention and moisture absorption and release properties.

Therefore, the yarn according to one aspect of the present invention can be provided with good waterproofness and antifouling property, as well as good breathability, moisture permeability, heat retention, and moisture absorption and release properties. For this reason, according to one aspect of the present invention, a textile product that requires breathability, moisture permeability, heat retention, and / or moisture absorption and release (for example, medical products such as socks for preventing deep vein thrombosis, shoes, Water resistance and stain resistance can be imparted to the upper fabric portion and clothing items such as underwear and raincoats.

In the above configuration, preferably, the surface and the cross section of the porous membrane also have water repellency, and the average pore diameter of the porous membrane is also 0.1 μm or more and 10 μm or less.

In the yarn (1 to 5) according to the second aspect of the present invention, in the yarn according to the first aspect, the average fiber diameter of the fibers constituting the porous slit yarn (1) is 0.5 μm or less It is preferable to set it as a certain structure.

According to the said structure, the average fiber diameter of the fiber which comprises the said porous slit thread | yarn is 0.5 micrometer or less. For this reason, it is easy to make the average pore diameter of the porous slit yarn be 0.1 μm or more and 10 μm or less.

In the above configuration, preferably, the average fiber diameter of the fibers constituting the porous membrane is also 0.5 μm or less.

In the yarn (1 to 5) according to the third aspect of the present invention, in the yarn according to the first or second aspect, the porous slit yarn (1) has a thickness of 80 μm or less. Is preferred.

According to the above configuration, the thickness of the porous slit yarn is 80 μm or less. For this reason, the thickness of the yarn of the above configuration can fall within a range suitable for processing (weaving in a woven fabric or knitting in a knitted fabric).

In the above configuration, preferably, the thickness of the porous membrane is also 80 μm or less.

The yarns (1 to 5) according to the fourth aspect of the present invention are the yarns according to the first to third aspects, wherein at least a part of the surface of the porous slit yarn (1) is coated with an oil repellent agent It is preferable to be configured to have oil repellency.

According to the above configuration, at least a part of the surface of the porous slit yarn is coated with the oil repellent agent and provided with oil repellency. Moreover, the average pore diameter of the porous slit yarn is 10 μm or less. For this reason, the fats and oils which are in a liquid state are inhibited by surface tension from entering the pores of the porous slit yarn. Thus, the porous slit yarn has good oil resistance. For this reason, since the antifouling property of the porous slit yarn is improved, the antifouling property of the yarn of the above configuration can be improved.

In the above configuration, preferably, the surface of the porous membrane is coated with an oil repellent agent to provide oil repellency.

In the yarns (1 to 5) according to the fifth aspect of the present invention, in the yarns according to the first to fourth aspects, the material constituting the porous slit yarn (1) is a fluororesin. It is preferable to do.

According to the said structure, the material which comprises a porous slit thread | yarn is a fluororesin. For this reason, the porous slit yarn can have chemical resistance as well as water repellency and oil repellency. Due to chemical resistance, the porous slit yarn can maintain waterproofness, oil resistance, dust resistance, and soil resistance even when it is washed with a detergent.

A yarn (2, 3) according to a sixth aspect of the present invention is the yarn according to the first to fifth aspects, wherein the porous slit yarn (1) is included as a core yarn, and the porous slit yarn ( The composite yarn preferably further includes a covering yarn (30, 40) covering 1).

According to the above configuration, the porous slit yarn is covered with the covering yarn. Therefore, the covering yarn prevents fuzzing of the porous slit yarn. Further, since the porous slit yarn is reinforced by the covering yarn, the strength of the yarn of the above configuration can be improved.

The covering yarn in the above configuration may be covered or knit covered with the above-mentioned porous slit yarn as a core yarn. Further, the covering yarn in the above configuration may be any of a filament yarn, a spun yarn, and a slit yarn.

The yarn (2, 3) according to the seventh aspect of the present invention is the yarn according to the sixth aspect, and the covering (30, 40) yarn in the yarn according to the seventh aspect is stain resistant Preferably, This is because when the covering yarn does not have the antifouling property, the whole yarn of the above configuration does not have the antifouling property, whereas when the covering yarn has the antifouling property, the whole yarn of the above configuration has the antifouling property. It is because it prepares.

Similarly, the covering yarn in the above configuration is preferably provided with waterproofness, oil resistance and dust resistance.

A yarn (5) according to an eighth aspect of the present invention is the yarn according to the first to fifth aspects, wherein the porous slit yarn (1) is included as a covering yarn and covered with the porous slit yarn. It is also preferable to be a composite yarn further including a core yarn (50).

According to the above configuration, since the porous slit yarn is reinforced by the core yarn, the strength of the yarn of the above configuration can be improved.

The porous slit yarn, which is the covering yarn in the above configuration, may be covered with a core yarn or covered with a knit. Further, the core yarn in the above configuration may be any of a filament yarn, a spun yarn, and a slit yarn.

The yarn (5) according to the ninth aspect of the present invention is the yarn according to the eighth aspect, and the core yarn (50) in the yarn according to the ninth aspect is provided with antifouling properties. preferable. This is because when the core yarn does not have antifouling properties, the whole yarn of the above configuration does not have antifouling properties, whereas when the core yarn has antifouling properties, the whole yarn of the above configuration is antifouling. It is because it prepares.

Similarly, it is preferable that the core yarn in the above configuration be provided with waterproofness, oil resistance, and dust resistance.

A yarn (4) according to a tenth aspect of the present invention is a yarn according to the first to fifth aspects, wherein the yarn is a double-twisted yarn obtained by combining a plurality of the porous slit yarns (1). Is also preferred.

According to the above configuration, since the porous slit yarn is reinforced by the twisting, the strength of the yarn of the above configuration can be improved.

The fiber product (6, 82) according to an eleventh aspect of the present invention has a configuration in which the yarns (1 to 5) according to the first to tenth aspects are used.

The textile (6) according to the twelfth aspect of the present invention may be used for medical products.

The textile (82) according to the thirteenth aspect of the present invention may be used for a shoe (80).

The production method of a yarn according to a fourteenth aspect of the present invention is a production method including a step of slitting a porous film having a water repellency on the surface and having an average pore diameter of 0.1 μm to 10 μm.

According to the above manufacturing method, the yarn having the configuration according to the first to tenth aspects can be manufactured.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention.

The present invention can be utilized in applications and products that require breathability and / or moisture permeability. In the present invention, it is particularly preferable that (i) any one or more of (i) waterproofness, oil resistance, dust removability and antifouling properties are required, or any one or more thereof be provided. ii) It can be used for applications and products where breathability and / or moisture permeability is required.

The present invention can be utilized, for example, in medical applications such as deep vein thrombosis prevention, uppers of shoes, and clothing applications such as underwear and raincoats.

1 Fluororesin porous slit yarn (yarn, porous slit yarn)
2, 3 and 5 composite yarn (yarn)
4 Twisted yarn (yarn)
6 Socks (textile products)
10 Fluororesin porous membrane (porous membrane)
20 slitting blade 30 covering yarn 40 covering slit yarn (covering yarn)
50 core thread 60 water drops 70 steam 80 shoes (shoes)
82 Upper cloth part (textile product)

Claims

Including a porous slit yarn in which the porous membrane is slit;
The surface of the porous slit yarn has water repellency,
The yarn characterized in that the average pore diameter of the porous slit yarn is 0.1 μm or more and 10 μm or less.
The yarn according to claim 1, wherein an average fiber diameter of fibers constituting the porous slit yarn is 0.5 μm or less.
The yarn according to claim 1 or 2, wherein the thickness of the porous slit yarn is 80 μm or less.
The yarn according to any one of claims 1 to 3, wherein at least a part of the surface of the porous slit yarn is coated with an oil repellent agent and has oil repellency.
The material according to any one of claims 1 to 4, wherein the material forming the porous slit yarn is a fluorine resin.
The yarn according to claim 5, wherein the cross-sectional shape of the porous slit yarn is a modified cross-sectional shape.
Including the porous slit yarn as a core yarn,
The yarn according to any one of claims 1 to 6, which is a composite yarn further comprising a covering yarn covering the porous slit yarn.
The yarn according to claim 7, wherein the covering yarn has antifouling properties.
Including the porous slit yarn as a covering yarn;
The yarn according to any one of claims 1 to 6, which is a composite yarn further including a core yarn covered with the porous slit yarn.
The yarn according to claim 9, wherein the core yarn has antifouling properties.
The yarn according to any one of claims 1 to 6, which is a double-twisted yarn in which a plurality of the porous slit yarns are double-twisted.
A textile product characterized in that the yarn according to any one of claims 1 to 11 is used.
The textile product according to claim 12, which is used for medical products.
The textile product according to claim 12, which is used for shoes.
A method for producing a yarn, comprising the step of slitting a porous film having a water repellant surface and having an average pore diameter of 0.1 μm to 10 μm.