JP2010163712A - Sock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sock having excellent wearing comfortability owing to the constituent fiber effect of the socks. <P>SOLUTION: The sock contains a cloth having a fabric texture and a knitting texture. The cloth contains a filament (A) with a single fiber diameter of 10-1,500 nm, and a filament B with a single fiber diameter larger than 1,500 nm. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a sock having superior wearing comfort due to the effect of constituent fibers of the sock.

Conventionally, as socks, various socks such as a sock having improved water absorption by using ultrafine fibers and a sock having a plate-like material on the sole are proposed (for example, Patent Document 1 and Patent Document 2). reference).
However, socks that have not been provided with a plate-like material and prevent the slip between the socks and the socks from slipping due to the effect of the constituent fibers of the socks, and that improve the wearing comfort have not been proposed so far.
In addition, the super extra fine fiber called nanofiber is known (for example, refer patent document 3, patent document 4, patent document 5, patent document 6).

Japanese Utility Model Publication No. 58-7721 JP 2006-249623 A JP 2003-41432 A JP 2004-162244 A JP-A-2005-23466 JP 2007-2364 A

  This invention is made | formed in view of said background, The objective is to provide the sock which has the wearing comfort outstanding by the effect of the constituent fiber of socks.

  As a result of diligent investigations to achieve the above-mentioned problems, the present inventors have found that when the filament having a single fiber diameter of 10 to 1500 nm is arranged so as to be exposed on the front or back surface of the sock, the surface on which the filament is exposed becomes difficult to slip. The present inventors have found that a sock with excellent wearing comfort can be obtained by preventing slippage between the shoe and the sock, and preventing the sock from being displaced, and have intensively studied to complete the present invention. It was.

  Thus, according to the present invention, “a sock including a fabric having a woven fabric or a knitted fabric, wherein the fabric includes a filament A having a single fiber diameter of 10 to 1500 nm, and a filament B having a single fiber diameter of more than 1500 nm; A sock characterized in that it includes a sock.

  At that time, it is preferable that the filament A is exposed on at least one of the front surface and the back surface of the fabric. The filament A is preferably made of polyester, nylon or acrylic. Further, the number of filaments of the filament A is preferably 500 or more. The filament B is preferably made of polyester, nylon, acrylic, cotton, or polyurethane. Moreover, it is preferable that the filament number of the filament yarn B is in the range of 1 to 500. Moreover, it is preferable that the said filament A is exposed to the surface or back surface of the sole part of a sock, a heel part, or a rubber-mouth part.

  According to the present invention, a sock having excellent wearing comfort can be obtained by preventing slippage between the shoe and the sock due to the effect of the constituent fiber of the sock, or preventing the slippage of the sock.

It is a figure which shows socks typically.

Hereinafter, embodiments of the present invention will be described in detail.
The sock of the present invention is a sock including a fabric having a woven structure or a knitted structure, and the fabric includes a filament A having a single fiber diameter of 10 to 1500 nm and a filament B having a single fiber diameter of more than 1500 nm. .

  Here, in the filament yarn A (hereinafter also referred to as “nanofiber”), the single fiber diameter (the diameter of the single fiber) is 10 to 1500 nm (preferably 250 to 800 nm, particularly preferably 510 to 800 nm). ) Is essential. When the single fiber diameter is smaller than 10 nm, the fiber strength is lowered, which is not preferable for practical use. On the other hand, when the single fiber diameter is larger than 1500 nm, it is not preferable because it tends to be slippery on the front or back surface of the sock, and the wearing comfort of the sock, which is the main object of the present invention, may not be obtained. Here, when the cross-sectional shape of the single fiber is an atypical cross section other than the round cross section, the diameter of the circumscribed circle is defined as the single fiber diameter. The single fiber diameter can be measured by photographing the cross section of the fiber with a transmission electron microscope.

  In the filament yarn A, the number of filaments is not particularly limited, but is preferably 500 or more (more preferably 2000 to 50000) in order to obtain a slipperiness on the front or back surface of the sock or a texture peculiar to the ultrafine fibers. . The total fineness of the filament yarn A (the product of the single fiber fineness and the number of filaments) is preferably in the range of 50 to 800 dtex.

  The fiber form of the filament yarn A is not particularly limited, but is preferably a long fiber (multifilament yarn). The cross-sectional shape of the single fiber is not particularly limited, and may be a known cross-sectional shape such as a circle, a triangle, a flat shape, or a hollow shape. In addition, normal air processing and false twist crimping may be applied. Two or more types of filament yarn A may be used.

  The type of polymer forming the filament yarn A is not particularly limited, and any polymer may be used, but polyester, nylon, or acrylic is preferable in terms of fiber strength. Among these, polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid, polyester obtained by copolymerizing the third component, and the like are preferably exemplified. Such polyester may be material recycled or chemically recycled polyester. Further, polyesters obtained by using a catalyst containing a specific phosphorus compound and a titanium compound, such as those described in JP-A-2004-270097 and JP-A-2004-212268, polylactic acid, and stereocomplex Polylactic acid may be used. In the polymer, a fine pore forming agent, a cationic dye dyeing agent, an anti-coloring agent, a heat stabilizer, a fluorescent whitening agent, a matting agent, a coloring agent may be added as necessary within the range not impairing the object of the present invention. 1 type (s) or 2 or more types of an agent, a hygroscopic agent, and inorganic fine particles may be contained.

  It is important that the filament yarn B contained in the sock of the present invention has a single fiber diameter larger than 1500 nm (preferably 2 to 33 μm). If the single fiber diameter is 1500 nm (1.5 μm) or less, the shape retention of the socks may be impaired. Here, when the cross-sectional shape of the single fiber is an atypical cross section other than the round cross section, the diameter of the circumscribed circle is defined as the single fiber diameter. The single fiber diameter can be measured by photographing the cross section of the fiber with a transmission electron microscope, as described above.

  In the filament yarn B, the number of filaments is not particularly limited, but is preferably in the range of 1 to 300. The fiber form of the filament yarn B is not particularly limited and may be a spun yarn, but it is preferable to use a long fiber (multifilament yarn), a polyurethane fiber, or both. The cross-sectional shape of the single fiber is not particularly limited, and may be a known cross-sectional shape such as a circle, a triangle, a flat shape, or a hollow shape. Further, normal air processing and false twist crimping may be applied, and the filament yarn B may be of two or more types.

  The type of polymer forming the filament yarn B is not particularly limited, and any polymer may be used, but polyester, nylon, acrylic, cotton, or polyurethane is preferable in terms of fiber strength. Of these, polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid, polyester obtained by copolymerization of the third component, polyether ester, urethane and the like are preferably exemplified. Such polyester may be material recycled or chemically recycled polyester. Furthermore, polyester, polylactic acid, and stereocomplex poly obtained by using a catalyst containing a specific phosphorus compound and a titanium compound as described in JP-A-2004-270097 and JP-A-2004-212268. Lactic acid may be used, but an elastic resin such as polyetherester or polyurethane is preferable when the anti-slip effect is further pursued. In the polymer, a fine pore forming agent, a cationic dye dyeing agent, an anti-coloring agent, a heat stabilizer, a fluorescent whitening agent, a matting agent, a coloring agent may be added as necessary within the range not impairing the object of the present invention. 1 type (s) or 2 or more types of an agent, a hygroscopic agent, and inorganic fine particles may be contained.

  In the filament yarn A and filament yarn B, the fibers preferably have a plurality of combinations. For example, an elastic fiber yarn made of polyurethane fiber or polyether ester fiber, and a polyester fiber yarn or nylon fiber yarn. And composite yarn in which polyester yarn or nylon fiber yarn is covered around an elastic fiber yarn made of polyurethane fiber or polyetherester fiber, etc. Alternatively, a composite yarn with a spun yarn, or a knitted or woven fabric may be used.

  In the sock of the present invention, it is preferable that the filament A is exposed on at least one (preferably both sides) of the front and back surfaces of the fabric. When the filament A (nanofiber) is used so as to come into contact with the skin, excellent frictional force with the skin is obtained, socks are less likely to slip, and wearing comfort is improved. Moreover, if it uses so that the said filament A (nanofiber) may be located in the external air side, the outstanding frictional force with shoes and a floor will be obtained, it will become difficult to slip, and wearing comfort will improve. Here, the surface of the knitted fabric (back surface) was photographed using an electron microscope at a magnification of 50 times, and the area AA occupied by the filament yarn A and the area BA occupied by the filament yarn B were measured in the photograph, and the filament The area ratio (%) of the yarn A (= AA / (AA + BA) × 100) is preferably 30% or more.

  The sock of the present invention can be manufactured, for example, by the following manufacturing method. First, a sea-island composite fiber (filament yarn A fiber) formed of a sea component and an island component made of polyester and having a diameter of 10 to 1500 nm is prepared. As such a sea-island type composite fiber, a sea-island type composite fiber multifilament (100 to 1500 islands) disclosed in Japanese Patent Application Laid-Open No. 2007-2364 is preferably used.

  That is, as the sea component polymer, polyester, polyamide, polystyrene, polyethylene and the like having good fiber forming properties are preferable. For example, as an easily soluble polymer in an alkaline aqueous solution, polylactic acid, an ultra-high molecular weight polyalkylene oxide condensation polymer, a polyethylene glycol compound copolymer polyester, a copolymer polyester of polyethylene glycol compound and 5-sodium sulfonic acid isophthalic acid may be used. Is preferred. Among them, a polyethylene terephthalate copolymer polyester having an intrinsic viscosity of 0.4 to 0.6 obtained by copolymerizing 6 to 12 mol% of 5-sodium sulfoisophthalic acid and 3 to 10% by weight of polyethylene glycol having a molecular weight of 4000 to 12000. Is preferred.

  On the other hand, the island component polymer is preferably a polyester such as polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid, or polyester obtained by copolymerizing a third component, which has good fiber-forming properties. In the polymer, a fine pore forming agent, a cationic dye dyeing agent, an anti-coloring agent, a heat stabilizer, a fluorescent whitening agent, a matting agent, a coloring agent may be added as necessary within the range not impairing the object of the present invention. 1 type (s) or 2 or more types of an agent, a hygroscopic agent, and inorganic fine particles may be contained.

  The sea-island composite fiber composed of the sea component polymer and the island component polymer preferably has a sea component melt viscosity higher than that of the island component polymer during melt spinning. Further, the diameter of the island component needs to be in the range of 10 to 1500 nm. At this time, if the shape of the island component is not a perfect circle, the diameter of the circumscribed circle is obtained. In the sea-island composite fiber, the sea-island composite weight ratio (sea: island) is preferably in the range of 40:60 to 5:95, and particularly preferably in the range of 30:70 to 10:90.

  Such a sea-island type composite fiber multifilament yarn can be easily manufactured, for example, by the following method. That is, melt spinning is performed using the sea component polymer and the island component polymer. As the spinneret used for melt spinning, any one such as a hollow pin group for forming an island component or a group having a fine hole group can be used. The discharged sea-island type cross-section composite fiber multifilament yarn is solidified by cooling air, and is preferably wound after being melt spun at 400 to 6000 m / min. The obtained undrawn yarn is made into a composite fiber having desired strength, elongation, and heat shrinkage properties through a separate drawing process, or is taken up by a roller at a constant speed without being wound once, and subsequently drawn. Any of the methods of winding after passing through may be used. In such a sea-island type composite fiber multifilament yarn, the single yarn fiber fineness, the number of filaments, and the total fineness are within the range of single yarn fiber fineness of 0.5 to 10.0 dtex, the number of filaments of 5 to 75, and the total fiber of 30 to 170 dtex, respectively. It is preferable that Further, the boiling water shrinkage of such sea-island type composite fiber multifilament yarn is preferably in the range of 5 to 30%.

  On the other hand, a filament B having a single fiber fineness of 0.1 dtex or more (preferably 0.1 to 50 dtex) is prepared. In order to make the single fiber diameter of the filament yarn B in the finally obtained fabric larger than 1500 nm, it is preferable that the single fiber fineness is within the above range.

  In the filament yarn B, the number of filaments and the total fineness are preferably in the range of 1 to 300 filaments and the total fineness of 10 to 800 dtex, respectively. The filament yarn is preferably a high-shrinkage polyester having a boiling water shrinkage of 10% or more (more preferably 20 to 40%) or an elastic yarn (polyurethane elastic yarn or polyetherester elastic yarn). . In order to obtain a high boiling water shrinkage as described above, it is preferable to spin and stretch the copolymer polyester using a conventional method. At that time, as the copolyester, the main constituent monomers of the copolyester are terephthalic acid and ethylene glycol, and the third component copolymerized with this main constituent monomer is isophthalic acid, naphthalenedicarboxylic acid, adipic acid, sebacic acid. , Diethylene glycol, polyethylene glycol, bisphenol A, and bisphenol sulfone. In particular, the copolyester is a copolyester in which the acid component is composed of terephthalic acid and isophthalic acid having a molar ratio (terephthalic acid / isophthalic acid) of 90/5 to 85/15, and the glycol component is composed of ethylene glycol. Is preferred. By using such a copolyester, a high boiling water shrinkage can be obtained.

  Next, using the sea-island type composite fiber multifilament yarn and the filament yarn B, a knitted or knitted fabric is knitted by a conventional method, preferably so that the sea-island type composite fiber filament yarn is exposed on the front surface and / or back surface of the fabric. . At that time, the sea-island type composite fiber filament yarn and the filament yarn B may be included in the woven or knitted fabric as a mixed yarn, but the knitted fabric is obtained by knitting or knitting the filament yarn A and the filament B. Or it is preferable to knit the woven fabric. The total fineness ratio between the sea-island type composite fiber filament yarn and the filament yarn B is preferably in the range of 90:10 to 20:80.

Further, the sock may be directly sewn by a sock knitting machine using the sea-island type composite fiber multifilament yarn and the filament yarn B, or the sock may be sewn after first obtaining a fabric.
The fabric structure and knitted structure of the fabric are not particularly limited, and the weft knitting structure includes a tentacle knitting, a rubber knitting, a double-sided knitting, a pearl knitting, a tuck knitting, a floating knitting, a one-sided knitting, a lace knitting, a bristle knitting and the like. Examples of the warp knitting structure include single denby knitting, single atlas knitting, double cord knitting, half knitting, half base knitting, satin knitting, half tricot knitting, fleece knitting, jacquard knitting, etc. Examples thereof include, but are not limited to, a three-layer structure such as plain weave, twill weave, and satin weave, a change structure, a single double structure such as a vertical double weave and a horizontal double weave, and a vertical velvet. The number of layers may be a single layer or a multilayer of two or more layers.

  Next, the sock or woven or knitted fabric (fabric) is treated with an alkaline aqueous solution, and the sea component of the sea-island composite fiber is dissolved and removed with an alkaline aqueous solution, whereby the sea-island composite fiber filament yarn has a single fiber diameter of 10 to 1500 nm. By using the filament yarn A, the sock fabric of the present invention is obtained. At that time, the alkaline aqueous solution treatment may be performed at a temperature of 55 to 65 ° C. using a 3 to 4% NaOH aqueous solution.

  Further, the fabric may be dyed before and / or after the dissolution removal with the alkaline aqueous solution. You may give a calendar process (heat-pressing process) and an embossing. Furthermore, conventional brushing processing, water repellent processing, and various functions that provide functions such as ultraviolet ray shielding or antistatic agents, antibacterial agents, deodorants, insect repellents, phosphorescent agents, retroreflective agents, negative ion generators, etc. Processing may be additionally applied.

  Next, socks are sewn by a conventional method using the above-mentioned fabric alone or in combination with other fabrics as necessary. At that time, the sock may be composed only of the fabric, but the fabric may be arranged on the skin side, and on the other hand, for example, a normal polyester woven or knitted fabric may be arranged on the outside air side, or vice versa. But you can.

  In the sock obtained in this way, when the surface on which the filament yarn A (nanofiber) is exposed is used on the side in contact with the skin, the frictional force between the fabric and the skin is improved, so that the sock is less likely to be displaced and comfortable to wear. Will improve. Moreover, if it uses so that the said filament A (nanofiber) may be located in the external air side, the outstanding frictional force with shoes and a floor will be obtained, it will become difficult to slip, and wearing comfort will improve. It is also safe. In particular, when the filament A is exposed on the front surface or the back surface (preferably the front surface and the back surface) of the sole part of the sock, the heel part, or the rubber band part, the sock is difficult to slip, Slippery and preferable.

  The reason why the frictional force is improved has not yet been clarified, but it is because the surface of the fabric becomes flat and the contact area with the skin and shoes increases, and the nanofibers are caught on the unevenness of the skin and shoes. Estimated.

Moreover, since the filament yarn B larger than 1500 nm is contained in the sock of the present invention, the shape retention of the sock is improved.
The sock of the present invention is suitable for any of men's use, women's use, infant use, and work use. Even if accessories such as accessories are provided, there is nothing wrong.

  Next, although the Example and comparative example of this invention are explained in full detail, this invention is not limited by these. In addition, each measurement item in an Example was measured with the following method.

<Melt viscosity>
The polymer after the drying treatment is set in an orifice set to a ruder melting temperature at the time of spinning and melted and held for 5 minutes, and then extruded by applying a load of several levels, and the shear rate and melt viscosity at that time are plotted. By gently connecting the plots, a shear rate-melt viscosity curve is created, and the melt viscosity when the shear rate is 1000 sec- ¹ is observed.

<Dissolution rate>
The yarn is wound at a spinning speed of 1000 to 2000 m / min with a 0.3φ-0.6L × 24H base of each of the sea and island components, and further stretched so that the residual elongation is in the range of 30-60%. Thus, 84 dtex / 24 fil multifilament is produced. The weight loss rate was calculated from the dissolution time and the dissolution amount at a bath ratio of 100 at a temperature at which the solvent was dissolved in each solvent.

<Exposure ratio of filament yarn A>
The front and back surfaces of the fabric are photographed at a magnification of 100 using an electron microscope, and the area AA occupied by the filament yarn A and the area BA occupied by the filament yarn B are measured in the photograph, and the area of the filament yarn A is measured. The ratio (%) (= AA / (AA + BA) × 100) was calculated.

<Slippery evaluation 1>
With 5 evaluators wearing socks, they walked on the flooring floor and judged the degree of slip. Judgment criteria were grade 5 when it was very difficult to slide, class 4 when it was difficult to slide, class 3 when it was slightly slipped, class 2 when it was slippery, and class 1 when it was very slippery.

<Slippery evaluation 2>
With 5 evaluators wearing socks and sneakers, a slight exercise was performed to determine the degree of slipping of the foot in the sneakers. Judgment criteria were grade 5 when it was very difficult to slide, class 4 when it was difficult to slide, class 3 when it was slightly slipped, class 2 when it was slippery, and class 1 when it was very slippery.

<Evaluation of misalignment>
With 5 evaluators wearing socks, a mild exercise was performed to determine the sock misalignment. Judgment criteria were grade 5 for very difficult deviation, grade 4 for difficult deviation, grade 3 for slight deviation, grade 2 for deviation, and grade 1 for very easy deviation.

<Evaluation of comfort>
Five evaluators wore socks and judged the comfort. Judgment criteria were grade 5 for very comfortable, grade 4 for comfortable, grade 3 for slightly comfortable, grade 2 for slightly uncomfortable, and grade 1 for uncomfortable.

<Comprehensive evaluation of wearing comfort>
The total points of the above-mentioned slipperiness evaluation 1, slipperiness evaluation 2, slippage difficulty evaluation, and comfort evaluation are 18 grades or more, 5 grades, 17-15 points grade 4, 14-12 points grade 3, 11-11 Nine points were graded 2, and 8 or less were graded 1.

[Example 1]
Polyethylene terephthalate (melt viscosity at 280 ° C., 1200 poise, matting agent content: 0 wt%) as island component, 6 mol% of 5-sodium sulfoisophthalic acid and polyethylene glycol of number average molecular weight 4000 as sea component A sea-island type composite unstretched fiber having a melting rate of 1750 poise at 280 ° C. (dissolution rate ratio (sea / island) = 230), sea: island = 30: 70, and number of islands = 836 Was melt-spun at a spinning temperature of 280 ° C. and a spinning speed of 1500 m / min, and then wound up.
The obtained undrawn yarn was roller-drawn at a drawing temperature of 80 ° C. and a draw ratio of 2.5 times, and then heat-set at 150 ° C. and wound up. The obtained sea-island type composite fiber (filament yarn A fiber, drawn yarn) was 56 dtex / 10 fil. When the cross section of the fiber was observed with a transmission electron microscope TEM, the shape of the island was round and the diameter of the island was 700 nm.
The obtained sea-island type composite fiber (filament yarn A fiber, drawn yarn) was twisted three times (100 times / m in the S direction) by an ordinary twisting method to obtain a 167 dtex / 30 fil twisted yarn.

On the other hand, a covering yarn was obtained using ordinary covering processing, using polyurethane yarn 33 dtex / 1 fil as the core yarn, and polyethylene terephthalate false twist crimped yarn 84 dtex / 36 fil as the sheath yarn.
Next, seven twisted yarns and one covering yarn are aligned, and using a normal sock knitting machine (manufactured by Nagata Seiki Co., Ltd., model K-172), the number of courses is 19 / 2.54 cm. As shown in FIG. 1, a knitted sock having a number of wales of 14 / 2.54 cm was obtained.
Next, the socks were wet-heat treated at 50 ° C., and then the weight of the sea-island composite fiber was reduced by 30% (alkali reduction) at 55 ° C. with a 2.5% NaOH aqueous solution. Thereafter, conventional wet heat processing and dry heat processing were performed.

  In the obtained sock, the filament yarn A was exposed on the front and back surfaces of the sole, heel, and mouth rubber part of the sock. The average fiber diameter of the filament yarn A is 700 nm, the single fiber diameter of the polyurethane yarn (filament yarn B1) is 60 μm, and the single fiber diameter of the polyethylene terephthalate false twisted crimped yarn (filament yarn B2) is 15 μm. It was. In the sock, 97% of the filament yarn A was exposed on the front surface (outside air side), and 85% of the filament yarn A was exposed on the back surface (skin side). Further, the slip resistance evaluation 1 was grade 5, the slip resistance evaluation 2 was grade 5, the slippage difficulty rating was grade 5, the comfort evaluation was grade 5, and the overall evaluation was grade 5.

[Comparative Example 1]
In Example 1, socks were obtained in the same manner as in Example 1 except that 167 dtex / 48 fil polyethylene terephthalate multifilament was used instead of the twisted yarn. Next, conventional wet heat processing and dry heat processing were performed.
In the obtained socks, the single fiber diameter of the polyethylene terephthalate multifilament is 18 μm, the single fiber diameter of the polyurethane yarn (filament yarn B1) is 60 μm, and the single fiber diameter of the polyethylene terephthalate false twist crimped yarn (filament yarn B2) is It was 15 μm. Further, in the socks, the non-slip evaluation 1 was grade 1, the non-slip evaluation 2 was grade 1, the slippage difficulty rating was grade 1, the comfort evaluation was grade 5, and the overall evaluation was grade 1.

[Comparative Example 2]
In Example 1, socks were obtained in the same manner using 40 / 2nd cotton yarn instead of twisted yarn. Next, conventional wet heat processing and dry heat processing were performed.
In the obtained socks, the single fiber diameter of the cotton yarn is 15 μm in terms of a round cross section, the single fiber diameter of the polyurethane yarn (filament yarn B1) is 60 μm, and the single fiber diameter of the polyethylene terephthalate false twisted crimped yarn (filament yarn B2) Was 15 μm. Further, the slip resistance evaluation 1 was grade 2, the slip resistance evaluation 2 was grade 2, the slippage difficulty assessment was grade 2, the comfort assessment was grade 5, and the overall assessment was grade 2.

  According to the present invention, a sock having excellent wearing comfort and safety can be provided by preventing slippage between the sock and the sock due to the effect of the fibers constituting the sock, and preventing the sock from shifting. And its industrial value is extremely large.

1 Mouth rubber part 2 Buttocks 3 Foot sole

Claims (7)

  A sock including a fabric having a woven or knitted structure, wherein the fabric includes a filament A having a single fiber diameter of 10 to 1500 nm and a filament B having a single fiber diameter of more than 1500 nm. .   The sock according to claim 1, wherein the filament A is exposed on at least one of a front surface and a back surface of the fabric.   The sock according to claim 1 or 2, wherein the filament A is made of polyester, nylon, or acrylic.   The sock according to any one of claims 1 to 3, wherein the filament A has 500 or more filaments.   The sock according to any one of claims 1 to 4, wherein the filament B is made of polyester, nylon, acrylic, cotton, or polyurethane.   The sock according to any one of claims 1 to 5, wherein the filament yarn B has a filament number in the range of 1 to 500.   The sock according to any one of claims 1 to 6, wherein the filament A is exposed on a front surface or a back surface of a sole part, a heel part, or a rubber band part of the sock.

Images