JP2003129327A - Specific cross section yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber that has a good fabric hand as a clothing material and can develop effective functions as a non-clothing material. SOLUTION: When the direct distance from the center of the gravity on the fiber cross section to the far most point of the outer periphery of the fiber is represented by A, the cross section has >=10-fold A length of the outer peripheral length of the total fiber. In addition, when the outer periphery length of the total fiber outer length is represented by B, the fiber has >=20 grooves of the width of <=1/50 B and the depth of >= the double width.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber having a surface structure which cannot be formed by conventional techniques for producing a fiber made of a thermoplastic polymer. , A fiber having a similar touch to natural silk fiber and capable of expressing a deep color tone, and also having a feature such as anti-snugging property and high wettability, as non-clothing, The present invention relates to fibers that can exhibit excellent wiping properties and excellent polishing properties.

[0002]

2. Description of the Related Art Conventionally, synthetic fibers such as polyester,
Fiber structures such as woven fabrics, knitted fabrics, and non-woven fabrics made of polyamide filaments have monotonic fineness and cross-sectional shape of the constituent filaments, so the texture and luster are monotonous compared to natural fibers such as cotton and hemp. It was recognized that it was cold and the quality was low as a fiber structure. In order to improve these drawbacks, various attempts have been made so far to make the cross-section of the fiber deformed, crimped, composite fiber, etc., but the current situation is that the objective has not been fully achieved yet. For example, JP-A-56-165015, JP-A-57-5921, JP-A-58-98425 and JP-A-61-23.
A composite fiber of an easily soluble polymer and polyester as shown in Japanese Patent No. 9010 is formed, and after that, a dry touch is added to the woven or knitted fabric to give it a texture and a unique luster by dry touch. Or Japanese Patent Publication Sho 51-72
02, JP-A-58-70771, and JP-A-6
As disclosed in Japanese Patent Laid-Open No. 2-133118, etc., a method of imparting spots in the fiber length direction to improve the feeling, or Japanese Patent Publication Nos. 53-35633 and 56-162.
As disclosed in Japanese Patent Publication No. 31-31, etc., a method of fibrillating synthetic fibers to improve the feeling, JP-B-45-18
No. 072, a method for producing a false twist fusion-bonded yarn to give a linen-like crispness, or a method for producing a mixed-fiber fusion-bonded yarn as disclosed in JP-A-63-6123. Alternatively, various methods such as a method of fibrillation as disclosed in JP-A-63-6161 have been proposed.

Further, in order to obtain a deep color tone, fine crater-like irregularities are formed on the fiber surface (Japanese Patent Publication No. Sho 59-24233), and slit-like grooves continuous along the longitudinal direction of the fiber. It has been proposed to provide at least five of them on the surface of the fiber (JP-A-60-151313). Although such a method can be applied to fibers having a relatively large fiber diameter, it has been difficult to apply such a method to ultrafine fibers. That is, if unevenness is provided on the surface of the ultrafine fiber, or if a slit-shaped groove is provided, since the fiber diameter is originally very small, the ultrafine fiber is likely to be cut, and it is difficult to obtain the ultrafine fiber having a desired tensile strength. Of. Even if such a method is applied to ultrafine fibers, it is difficult to dye in vivid colors because the fiber diameter is small.

Therefore, since the above-mentioned method can be applied only to fibers having a relatively large fiber diameter, a woven or knitted fabric having a deep color tone can be obtained by such a method.
It was not possible to obtain a woven or knitted fabric having a soft feeling with a "peach feeling". Further, the conventional fiber having a relatively large fiber diameter has a problem in that the cross-section of the fiber is basically circular and has a smooth surface as a whole, so that it is impossible to give a squeaky tactile sensation. In addition, since the surface of the constituent fibers has irregularities or slit-like scratches, the rigidity of the fibers is reduced, and it is difficult to impart sufficient tension to the resulting woven or knitted fabric. Many of these past proposals have not reached the level sufficient to satisfy the demands of modern consumers who desire higher quality. Moreover, many of the conventional products satisfy one required performance, and it is the fact that no one satisfying multiple demands according to the application has been obtained, and it is possible to satisfactorily meet the advanced demands of the present day. The problem was the lack of materials.

[Problems to be Solved by the Invention]

In view of the above-mentioned problems of the prior art, the present inventors have developed various required performances as a material for clothing (for example, feeling of crease, texture, etc.), and as a material for non-clothing, for example, As a result of diligent studies to realize a fiber form exhibiting excellent wiping and polishing properties, it was found that forming a groove with a specific structure on the fiber surface makes the fiber widely usable from clothing to non-clothing. The invention was reached.

[0006]

That is, the present invention relates to a fiber having 20 or more grooves on the fiber surface along the length direction of the fiber, and the fiber outer circumference from the center of gravity of the cross section of the fiber. When the linear distance to the furthest point of the section is A, the outer peripheral length B of the fiber cross section is 10 times or more the linear distance A, and the width of the groove is 1/50 of the outer peripheral length B. The fiber is characterized by having a groove depth of not less than twice the groove width.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The structure of the fiber of the present invention will be described with reference to the drawings. FIG. 1 is a photograph showing one form of the fiber of the present invention. FIG. 2 is a schematic view showing the shape of the cross section of the fiber of the present invention. In the present invention, the first requirement is that when the straight line distance from the center of gravity (G) of the fiber cross section to the furthest point on the outer circumference of the fiber cross section is A, the outer peripheral length B of the fiber cross section is A.
It is important that it is more than 10 times. Perimeter B
By setting in this way, the contact area between fibers increases, and when used as a material for clothing, the contact resistance increases, a desirable crease feeling is expressed, and even though it is a synthetic fiber, a wind like natural silk fiber is obtained. Will occur. Also, when used as a non-clothing fiber material, when B is 10 times or more than A, for example, marked wiping properties are exhibited as a wiper. Furthermore, in the present invention, the fiber cross section can be formed into a modified cross section or a hollow cross section as shown in FIGS.

Further, since the groove width of the fiber of the present invention changes to some extent depending on the particle size of the abrasive particles, it can be suitably used as a silicon wafer abrasive in the semiconductor field. By forming such a groove structure, it becomes possible to suitably carry fine abrasive fine particles. The ratio of the outer peripheral length B to the linear distance A from the center of gravity G described above is
It is preferably 15 times or more, more preferably 20 times or more, particularly preferably 30 times or more, and the upper limit is not particularly limited, but is preferably 200 times or less, more preferably 100 times or less.

In the present invention, the center of gravity of the fiber cross section is
G can be obtained by mass property calculation on a computer using an enlarged photograph of the fiber cross section. Also,
If it is a simple cross-sectional shape, cut an enlarged photo along the cross-sectional shape of the fiber, put it on a needle, for example, and simply find the point of approximate balance as the center of gravity G, and from that point to the furthest point on the outer circumference of the fiber. The straight line distance may be A. Also for the fiber outer circumference length B, by using an enlarged photograph of the same as above, it is possible to simply determine the total thread length as the outer circumference length B by stacking appropriate threads along the outer circumference of the fiber cross section, and obtain the ratio between A and B. it can.

The second requirement of the fiber of the present invention is a groove having a width of not more than 1/50 of the outer peripheral length B of the fiber cross section and having a depth of not less than 2 times, preferably not less than 3 times the width. Are present on the fiber surface in large numbers. By forming grooves of such a size on the fiber surface, the contact portions between the single fibers in the fiber assembly are intermeshed to form an associated state,
The contact resistance between the fibers is increased and good anti-snuggling property is exhibited. Further, by forming the groove structure, a good feeling of squeezing is exhibited and the fiber is suitable as a material for clothing.
In the present invention, the groove width C is set to 1/50 or less of the outer peripheral length B, and the groove depth D is set to be twice or more the groove width C so that the fiber contact A good association state is formed on the occasion of. Groove width C is 1/50 of outer peripheral length B
When the groove depth D is more than 2 or when the groove depth D is less than twice the groove width C, it is difficult to obtain good anti-snagging property and squeaky feeling. From this point of view, in the present invention, the groove width
C is 1/100 or less of the outer peripheral length B, more preferably 200
It is preferably 1 / or less, more preferably 1/250 or less. The lower limit is not particularly limited, but is preferably 1 / 10,000 or more, for example. The groove depth D is preferably 3 times or more the groove width C, and the upper limit is preferably 30 times or less, more preferably 20 times or less, and particularly preferably 15 times or less. The ratio between the groove width C and the groove depth D is the straight line distance of the perpendicular line from the center point of the straight line portion of the groove width C to the deepest point of the groove as shown in the enlarged view of FIG. It is obtained as the groove depth D. In the present invention, the desired performance is synergistically expressed by the combination of the first requirement and the second requirement.

The third requirement in the present invention is that 20 or more groove structures having the above-mentioned size are formed in the fiber cross section. If the number of grooves is less than 20, the association state developed when fibers come into contact with each other is not sufficient, and as a result, the desired performance is not sufficiently exhibited. Therefore, the number of grooves is preferably 25 or more, more preferably 45 or more. The upper limit of the number of grooves is not particularly limited, but is preferably 200 or less, more preferably 150 or less, and further preferably 100 or less.

As the polymer constituting the fiber of the present invention, basically any thermoplastic polymer can be used. For example, polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyhexamethylene terephthalate, Polyester polymers such as polyethylene naphthalate and polylactic acid,
Nylon 6, nylon 66, nylon 12 and other aliphatic polyamides, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polymethylmethacrylate and other vinyl polymers, polycarbonate, polyoxymethylene, polyphenylene sulfide, polyurethane and other condensation polymers, A molten liquid crystal polymer such as polyarylate can be applied, but a thermoplastic crystalline polymer such as a polyester type, a polyamide type, a polyolefin type, or a polycondensation type polymer is preferable.

The polymer may be selected from the various polymers exemplified above basically according to the purpose of use. For example, in the case of requiring a sensitizing effect such as a texture, a polyester is used. It is preferable to use a polymer, and when it is used in the field of non-clothing such as wiping property, polypropylene, polyamide and the like are suitable depending on the situation. When used for polishing cloths in the semiconductor field, it is preferable to use semi-aromatic polyamide, polyphenylene sulfide, polyethylene naphthalate, etc., which have high polymer melting point and glass transition point and high chemical resistance.

The polyester polymer used as one of the preferred polymers will be described in detail. A polyester containing ethylene terephthalate units and / or butylene terephthalate units and / or hexamethylene terephthalate units as main repeating units can be preferably used. When a copolymerized polyester having a third component introduced therein is used, the proportion of copolymerized units in the copolymerized polyester is preferably 20 mol% or less, more preferably 10 mol% or less. Examples of the unit include aromatic dicarboxylic acids such as isophthalic acid, phthalic acid, 2,6-naphthalene dicarboxylic acid, and 5-alkali metal sulfoisophthalic acid: fats such as oxalic acid, adipic acid, azelaic acid, and sebacic acid. Group dicarboxylic acids: Trimellitic acid, multifunctional carboxylic acids such as pyromellitic acid: or carboxylic acid units derived from their ester-forming component: diethylene glycol, propylene glycol, trimethylene glycol,
The units derived from butanediol, ethylene glycol, hexanediol, polyethylene glycol, glycerin, pentaerythritol and the like can be increased. The copolymerized polyester may contain one or more of the above-mentioned copolymerized units.

In the polyester component, if necessary, inorganic fine particles, optical brightener, stabilizer, antioxidant, ultraviolet absorber, hydrolysis inhibitor, antistatic agent, flame retardant, colorant and other additives. 1 type (s) or 2 or more types may be contained. Any kind of inorganic fine particles can be used as long as it does not have a deteriorating effect on the polyester forming the fibers and is excellent in stability by itself. Typical examples of the inorganic fine particles that can be effectively used in the present invention include, for example, silica, alumina, calcium carbonate, titanium oxide,
Examples thereof include barium sulfate, and these inorganic fine particles may be used alone or in combination of two or more kinds.

Further, in the present invention, the content of the inorganic fine particles is 0.02 to 10% based on the mass of the polyester.
It is preferably 0% by mass, more preferably 0.05 to 5.0% by mass. When the content of the inorganic fine particles is less than 0.02% by mass based on the mass of the polyester, the temperature of the heating zone for stretching and the running speed of the yarn,
Even if a slight change in tension applied to the running yarn occurs, loops, fluffs, and fineness unevenness will occur in the obtained fiber. On the other hand, when the content of the inorganic fine particles exceeds 10.0% by mass. In the fiber drawing step, the inorganic fine particles make the resistance between the running yarn and the air excessive, leading to the occurrence of fluff, the occurrence of yarn breakage, etc., and the process becomes unstable.

The polyamide polymer used as another suitable polymer will be described below. As the aliphatic polyamide, the above-mentioned nylon 6, nylon 66,
Metaxylene diamine nylon and polyamide containing nylon 12 as a main component are preferable. Depending on the purpose, a polyamide having a high melting point or glass transition point may be used, and in this case, a semiaromatic polyamide having thermoplasticity is preferably used. Examples of such a polyamide include a dicarboxylic acid and a diamine component, and 60 mol% or more of the dicarboxylic acid component is an aromatic dicarboxylic acid and 60 mol% or more of the diamine component is an aliphatic alkylene having 6 to 12 carbon atoms. An example is a polyamide that is a diamine.

As the aromatic dicarboxylic acid, terephthalic acid is preferable, and isophthalic acid, 2,6-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, 1,4-
Naphthalenedicarboxylic acid, 1,4-phenylenedioxydiacetic acid, 1,3-phenylenedioxydiacetic acid, diphenic acid, dibenzoic acid, 4,4′-oxydibenzoic acid, diphenylmethane-4,4′-dicarboxylic acid, Aromatic dicarboxylic acids such as diphenyl sulfone-4,4'-dicarboxylic acid and 4,4'-biphenyldicarboxylic acid may be used alone or in combination of two or more. The content of the aromatic dicarboxylic acid is preferably 60 mol% or more of the dicarboxylic acid component, and more preferably 75 mol% or more.

Dicarboxylic acids other than the above aromatic dicarboxylic acids include malonic acid, dimethylmalonic acid, succinic acid,
3,3-diethylsuccinic acid, glutaric acid, 2,2-dimethylglutaric acid, adipic acid, 2-methyladipic acid,
Aliphatic dicarboxylic acids such as trimethyladipic acid, pimelic acid, azelaic acid, sebacic acid, suberic acid; 1,3
Examples thereof include alicyclic dicarboxylic acids such as -cyclopentanedicarboxylic acid and 1,4-cyclohexanedicarboxylic acid. These acids may be used alone or in combination of two or more. Above all, in order to raise the glass transition point of the polymer, it is preferable that the dicarboxylic acid component is 100% aromatic dicarboxylic acid. Further, a polyvalent carboxylic acid such as trimellitic acid, trimesic acid or pyromellitic acid may be contained within the range where fiber formation is easy.

Further, 60 mol% or more of the diamine component is preferably composed of an aliphatic alkylenediamine having 6 to 12 carbon atoms, and such aliphatic alkylenediamines include 1,6-hexanediamine and 1,8. -Octanediamine, 1,9-nonanediamine, 1,10-decanediamine, 1,11-undecanediamine, 1,12-
Dodecanediamine, 2-methyl-1,5-pentanediamine, 3-methyl-1,5-pentanediamine, 2,
2,4-trimethyl-1,6-hexanediamine, 2,
4,4-trimethyl-1,6-hexanediamine, 2-
Methyl-1,8-octanediamine, 5-methyl-1,
Aliphatic diamines such as 9-nonanediamine may be mentioned. Among them, 1,9-nonanediamine alone or 1,9-nonanediamine and 2-methyl-1,8-octanediamine in combination are preferable from the viewpoints of fibering processability and desired yarn quality. The content of this aliphatic alkylenediamine is preferably 60 mol% or more of the diamine component, more preferably 75 mol% or more, and particularly 90 mol%.
The above is preferable from the viewpoints of fiberizing processability and yarn quality.

As diamines other than the above-mentioned aliphatic alkylenediamines, aliphatic diamines such as ethylenediamine, propylenediamine and 1,4-butanediamine; cyclohexanediamine, methylcyclohexanediamine,
Isophorone diamine, norbornane dimethyl diamine,
Alicyclic diamines such as tricyclodecanedimethyldiamine; p-phenylenediamine, m-phenylenediamine, xylylenediamine, 4,4'-diaminodiphenylmethane, 4,4'-diaminodiphenylsulfone,
Aromatic diamines such as 4,4′-diaminodiphenyl ether and mixtures thereof can be mentioned, and not only one kind but also two or more kinds can be used.

In the present invention, a stabilizer such as a copper compound, a colorant, an ultraviolet absorber, a light stabilizer, an antioxidant, an antistatic agent, a flame retardant is added to the polyamide component as long as the effect is not impaired. , A plasticizer, a lubricant and a crystal acceleration retarder can be added during the polymerization reaction or in the subsequent step. In particular, the addition of organic stabilizers such as hindered phenols, copper halide compounds such as copper iodide, and alkali metal halide compounds such as potassium iodide as heat stabilizers improves melt retention stability during fiber formation. Therefore, it is preferable. Further, the above-mentioned inorganic fine particles may be contained if necessary.

Next, the method for producing the fiber of the present invention will be described. The cross-sectional photograph of the fiber in FIG. 3 shows an example of a conjugate fiber which is an intermediate fiber for producing the fiber of the present invention. In this example, the fiber body composed of the polymer component X
(A gray portion in FIG. 3) and a polymer component Y having a higher solubility or decomposability than the component X (a sharp wedge-shaped white portion in FIG. 3) are radially compounded in the fiber cross section.
Then, by dissolving or decomposing and removing a predetermined amount of the component Y from this composite fiber, the fiber main body becomes the fiber of the present invention having a chestnut-shaped cross section. The chestnut-like shape means, for example, a shape as shown in the schematic view of FIG.

As the polymer component X forming the fiber main body, any polymer can be used as long as it is less likely to be dissolved or decomposed in a solvent or a drug as compared with the polymer component Y. When a polyester polymer is used for both components, it is preferable that the Y component is a polyester having an alkali dissolution rate of 5 times or more, preferably 10 times or more that of the X component. For example, a copolyester obtained by copolymerizing 1 to 5 mol% of 5-sodium sulfoisophthalic acid and 5 to 30 mass% of a polyalkylene glycol with a conventionally used diol component and dicarboxylic acid component is used. can do.

In the present invention, the groove depth D can be controlled by changing the removal rate of the polymer component Y, dissolving or
It can be arbitrarily set by appropriately setting the combination of polymers having different decomposition rates. The groove width C can be controlled arbitrarily by changing the composite ratio of the polymer component X and the polymer component Y, or by using a nozzle part in which the number of wedge portions is changed.

As the polymer component Y, the fiber of the present invention can be obtained by using water-soluble thermoplastic polyvinyl alcohol instead of polyester having a high alkali dissolution rate. The polyvinyl alcohol polymer used has a viscosity average polymerization degree of 200 to 500 and a saponification degree of 90 to 99.99.
Polyvinyl alcohol having a mol% and a melting point of 160 to 230 ° C. is preferable, and it may be a homopolymer or a copolymer, but from the viewpoint of melt spinnability, water solubility, and fiber properties, carbon such as ethylene and propylene. It is preferable to use a copolymerized polyvinyl alcohol modified by 0.1 to 20 mol% with an α-olefin whose number is 4 or less. in this case,
After the radial conjugate fiber as shown in FIG. 3 is produced, the polyvinyl alcohol component is dissolved and removed by hot water treatment to obtain the fiber of the present invention. Further, the conjugate fiber, which is an intermediate of the present invention, can be formed into a fiber by using a conventionally known composite spinning device for forming a composite fiber as long as the combination of the polymer component X and the polymer component Y is determined. . However, since more stable spinning becomes more difficult as the number of grooves increases, it is preferable to carefully set the structure of the spinning pack and spinning conditions.

In the present invention, in addition to the fiber having a round cross section in which a large number of wedge-shaped grooves are formed as shown in FIG. The cross-sectional shape may be modified as shown in FIGS. Specifically, the fiber cross section is changed into a shape similar to a pentagon or a hexagon by a higher-order processing such as false twist crimping, or a trilobal shape, a T shape, or the like by using a modified cross-section nozzle during spinning. Multi-lobed shapes such as 4-lobed, 5-lobed, and 6-lobed, and hollow shapes such as one-hole hollow, two-hole hollow or more multi-hole hollow, etc.
Various cross-sectional shapes are acceptable.

The single fiber fineness of the fiber of the present invention is not particularly limited, but preferably 0.5 to 6 dtex. Also,
Not only long fibers but also short fibers can be used.

The fibers of the present invention obtained as described above can be used as various fiber aggregates (fiber structures). Here, the fiber aggregate is a woven or knitted fabric consisting of the fibers of the present invention alone, not to mention a non-woven fabric, a woven or knitted fabric or a non-woven fabric formed by partially using the fibers of the present invention, for example, a natural fiber,
It may be a woven or knitted fabric with other fibers such as chemical fibers and synthetic fibers, or a mixed yarn, a woven or knitted fabric used as a mixed yarn, a mixed cotton nonwoven fabric, etc., but the proportion of the fiber of the present invention in the woven or knitted fabric or the nonwoven fabric is It is preferably 10% by mass or more, and more preferably 30% by mass or more. In addition, after knitting, weaving, or forming a non-woven fabric, a raising process such as a raising of a needle cloth or other finishing process may be performed as necessary.

The main use of the fiber of the present invention is to produce a woven or knitted fabric or the like by using a long fiber alone or in part, and use it as a material for clothing which exhibits a good feeling. On the other hand, staple fibers include staples for clothing, dry non-woven fabrics, wet non-woven fabrics, etc., and can be suitably used for non-clothing applications such as not only clothing but also cleaning cloths, filter materials, various living materials, industrial materials, etc. it can. Further, the fine groove structure on the fiber surface is effectively applied, and it can be suitably used in the field of battery separators in which good absorbency after hydrophilization is maintained.

[0031]

EXAMPLES The present invention will now be specifically described with reference to examples, but the present invention is not limited to these examples. The parts and% in the examples relate to mass unless otherwise specified.

Example 1 As polymer component X, the intrinsic viscosity [η] was 0.68 (measured at 30 ° C. in a solvent such as phenol / tetrachloroethane at a weight), and 3 mass parts of silica particles having an average particle diameter of 0.04 μm were used. % Polyethylene terephthalate is used, and on the other hand, as the polymer component Y, polyethylene terephthalate (η) 0.52 obtained by copolymerizing 8% by mass of polyethylene glycol having a molecular weight of 2000 and 5 mol% of 5-sodium sulfoisophthalic acid is used. The composite ratio of X and component Y is set to 3: 1 by mass, and each is melted by a separate extruder to obtain radial composite fibers having 50 wedge shapes formed by component Y in the cross section shown in FIG. It was discharged from the composite spinning nozzle. Then, after the yarn discharged from the spinneret was cooled by a 1.0 m long horizontal blowing type cooling air device, the yarn was continuously installed at a position 1.3 m from directly below the spinneret to a length of 1.0 m. , 30mm inner diameter tube heater
(Inner wall temperature 180 ° C) After drawing and stretching in the tube heater, apply the oil agent to the fiber coming out of the tube heater, and then wind it through a roller at a take-up speed of 4000 m / min, 111 dtex Radial composite fibers of / 24 filament were produced. The fiberizing processability was good and there was no problem. Using the obtained conjugate fiber as a warp and a weft, a plain weave having a warp density of 90 yarns / 25.4 mm and a weft yarn density of 85 yarns / 25.4 mm was prepared. After scouring this plain woven fabric, it is immersed in an alkaline aqueous solution (liquid temperature 100 ° C.) with caustic soda 20 g / l and a bath ratio of 1:30, and component Y is selectively selected so as to have a predetermined groove depth. It was dissolved and removed in. afterwards,
Dyeing was performed under the following conditions, dry finishing was carried out by a conventional method, and setting was carried out. The obtained woven fabric had a good sense of crease and was similar to a natural silk fiber woven fabric.

[0033]   Dyeing method     Dyeing: Dianix Red BN-SE (CI Disperse Red 127) 5% omf     Dispersion aid: Disper TL (manufactured by Meisei Chemical Industry Co., Ltd.) 1 g / l     PH adjusting agent: ammonium sulfate 1 g / l                 Acetic acid (48%) 1g / l     Bath ratio: 1:30     Temperature: 120 ℃ x 60 minutes   Reduction cleaning     Hydrosulfide 1g / l     Amylazine (Daiichi Kogyo Seiyaku) 1 g / l     NaOH 1g / l     Bath ratio: 1:30     Temperature: 80 ℃ x 120 minutes

Examples 2 to 12 Fiber formation and woven fabric preparation and evaluation were performed in the same manner as in Example 1 except that the surface groove shape of the fiber and the cross-sectional shape of the fiber were changed as shown in Table 1. In addition, Examples 10 to 1
In No. 2, fiber-forming was performed using a modified nozzle for the spinneret. In each case, the fiberizing processability was good, and the resulting woven fabrics all had a feeling of creaking and an excellent texture.

[0035]

[Table 1]

Examples 13 to 15 In Example 13, terephthalic acid was used as the dicarboxylic acid component and 1,9-nonanediamine / diamine component was used.
2-methyl-1,8-octanediamine (molar ratio = 50 /
50) using the aliphatic diamine component, and using semi-aromatic polyamide obtained by polymerizing these as the polymer component X, in Example 14, polyethylene naphthalate (manufactured by Kuraray, [η] = 0.75, melting point 270 ° C.) and polyphenylene sulfide (manufactured by Toray, brand A) in Example 15.
(504 × 02, melting point 280 ° C.) was used, and a radial conjugate fiber was obtained in the same manner as in Example 1 except that the spinneret temperature was changed according to the melting point of each polymer. Then warp density 1
50 threads / 25.4 mm, weft density 150 threads / 25.4 mm
A woven fabric was obtained in the same manner as in Example 1 except that the above plain woven fabric was used. Further, a test as a polishing cloth was conducted. Diameter 5
The woven fabric obtained above was bonded to a 00 mm lower platen with a pressure-sensitive adhesive, and then three silicon wafers having a diameter of 4 inches were bonded to a surface plate having a diameter of 230 mm with wax. The polishing cloth was mounted, and the polishing cloth was rotated at 100 rpm while refluxing a 20-fold pure water dilution of the colloidal silica slurry (Nalco # 2350) at a flow rate of 1 g / min. Was repeated. After the polished silicon wafer was washed and dried, the flatness of the wafer after polishing was good as a result of measurement with a flatness measuring device.

Examples 16 to 19 In Example 16, polytrimethylene terephthalate (manufactured by Kuraray, [η] = 0.82, melting point 230) was used as the polymer X.
C.) and polybutylene terephthalate
(Made by Mitsubishi Kasei, brand: Novadour (registered trademark) 5
010, melting point 224 ° C), Example 18 uses nylon 6 (manufactured by Ube Industries Ltd., brand: 1013BK, melting point 225 ° C), and Example 19 uses polypropylene (manufactured by Tonen Petrochemical,
(Brand: J-215, MI = 15, melting point 170 ° C.) was used, and a composite fiber was obtained in the same manner as in Example 1 except that the spinneret temperature was changed according to the melting point of each polymer. Using the 33 inch 22 gauge circular knitting machine, the obtained fiber was obtained as a knitted fabric having a mock Milano rib structure. After that, alkali reduction treatment and finishing treatment were performed under the same conditions as in Example 1. The obtained knitted fabrics were tested for wiping off stains as wipers, and all showed good wiping properties.

Example 20 As the polymer component X, the same polymer as in Example 1 was used, and as the polymer component Y, a heat-meltable modified polyvinyl alcohol (manufactured by Kuraray Co., saponification degree: 98.5, ethylene content 8. 0 mol%, degree of polymerization: 380) was used, and fiberizing was carried out in the same manner as in Example 1 except that the spinning oil was composed of an antistatic agent component containing no water and a leveling agent component. Then, a woven fabric was prepared by the same method. Then, the fabric was treated in hot water for 40 minutes to dissolve and remove the polymer component Y. It was found that the obtained woven fabric retains a good texture having a feeling of creaking.

Comparative Examples 1 to 4 The same method as in Example 1 was carried out except that the surface groove structure shown in Table 1 was formed. The resulting fabric did not have a good enough feel.

Comparative Examples 5 and 6 In Comparative Example 5, Nylon 6 was used as the polymer component X and the surface structure was set to the structure shown in Table 1 to Example 1.
The same procedure as 8 was carried out. Comparative Example 6 was carried out in the same manner as in Example 19 except that polypropylene was used as the polymer component X and the surface structure was set to the structure shown in Table 1. In all cases, the wiping performance using the obtained knitted fabric was insufficient.

[0041]

Industrial Applicability The fiber of the present invention exhibits various characteristics due to the surface groove structure, and when it is used for clothing, for example, it becomes a fiber having a good kissing feeling,
Further, when used for non-clothing, it is useful as a material exhibiting excellent wiping properties and excellent polishing properties.

[Brief description of drawings]

FIG. 1 is an electron micrograph showing the morphology of the fiber of the present invention.

FIG. 2 is a schematic view showing an example of a cross section of the fiber of the present invention.

FIG. 3 is a fiber cross-sectional photograph showing an example of the form of a conjugate fiber for obtaining the fiber of the present invention.

FIG. 4 is a schematic view showing an example of a cross section of the fiber of the present invention.

FIG. 5 is a schematic view showing an example of a cross section of the fiber of the present invention.

FIG. 6 is a schematic view showing an example of a cross section of the fiber of the present invention.

FIG. 7 is a schematic view showing an example of a cross section of the fiber of the present invention.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hitoshi Nakatsuka             1621 Sakata, Kurashiki City, Okayama Prefecture Kura Co., Ltd.             Within F-term (reference) 4L045 AA05 BA03 BA21 CB18

Claims (2)

[Claims] 1. A fiber surface is provided with two fibers along the length direction of the fiber.
A fiber having 0 or more grooves, the straight line distance from the center of gravity of the cross section of the fiber to the furthest point on the outer circumference of the fiber is A
And the outer peripheral length B of the fiber cross section is 1 of the linear distance A.
It is 0 times or more, and the width of the groove is 50 minutes of the outer peripheral length B.
A fiber having a groove depth of 1 or less and twice or more the groove width. 2. The fiber according to claim 1, which is formed of a thermoplastic polymer.