JP4956908B2 - Blended yarn or blended yarn or woven or knitted fabric containing polymer alloy fiber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a woven or knitted fabric having improved pill resistance and dye affinity which are the defects of a conventional combined filament yarn/blended yarn, or a woven or knitted fabric including PPS (polyphenylene sulfide), and also having improved heat insulation efficiency. <P>SOLUTION: The combined filament yarn or blended yarn includes 10-90 wt.% polymer alloy fiber consisting of a sea of easily dissolvable polymer and islands of the polyphenylene sulfide, and regulated so that the content of the polyphenylene sulfide may be 10-60 wt.%, the average diameter of the islands may be 1-1,500 nm, and the proportion of the islands having 1,500-5,000 nm diameters may be 0-5%. The woven or knitted fabric including 5-90 wt.% polymer alloy fiber consisting of the sea of the easily dissolvable polymer and the islands of the polyphenylene sulfide, and having excellent heat insulation properties has 3 or higher grade in the pilling rating based on JIS L-1076, and &ge;0.7 &deg;C m<SP>2</SP>hr/kcal clo value. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a woven or knitted fabric having good heat retention due to a polymer alloy fiber containing polyphenylene sulfide and having excellent wear resistance, dyeability and color development, and a blended yarn and a blended yarn for obtaining the same. It is.

  Polyphenylene sulfide (hereinafter abbreviated as PPS) was initially put into practical use in engineering plastics and heat-resistant films because of its excellent heat resistance and chemical resistance, but recently, its use is expanding in the fields of fibers and paper. For example, bag filters and the like have been put to practical use for textiles, and batteries and motor insulation materials have been put to practical use for paper, and the demand is expected to expand further.

  On the other hand, in the clothing field, Japanese Patent Application Laid-Open No. 2004-285517 has proposed a heat-insulating garment that takes advantage of the high thermal insulation of PPS. However, PPS has a problem that it is inferior in abrasion resistance and dyeability as compared with polyester and nylon which are general-purpose polymers. For this reason, there is a great limitation on the mixed use rate of PPS and the fabric design in the woven or knitted fabric. Furthermore, PPS is an expensive polymer compared to polyester and nylon, and there is a limit to the mixing ratio from the viewpoint of cost reduction.

By the way, very recently, it has been shown that a polymer alloy fiber in which 20% by weight of PPS is uniformly dispersed in polyethylene terephthalate (hereinafter abbreviated as PET) in a nano size can be obtained (Patent Document 1). If this polymer alloy fiber is used, the light fastness, dyeability and the like can be improved for a 100% PPS fabric, but it is still insufficient for use as clothing. For this reason, there has been a demand for yarns and knitted fabrics that can solve the disadvantages of conventional woven fabrics mixed with PPS fibers while maintaining good heat retention.
JP 2004-169261 A (pages 27-28)

  The present invention provides a knitted or knitted fabric that has improved wear resistance and dyeability, which are disadvantages of a conventional mixed fiber / spun yarn or woven or knitted fabric containing PPS, and further has improved heat retention efficiency.

The above object is achieved by the following means.
(1) A polymer alloy fiber in which polyethylene terephthalate is sea and polyphenylene sulfide is island, and the ratio of islands having a diameter of 1 to 100 nm and a diameter of 1500 to 5000 nm is 10 to 60% by weight of polyphenylene sulfide. A blended yarn comprising a polymer alloy fiber of 0 to 5%, wherein the ratio of the polymer alloy fiber is 10 to 90% by weight.
(2) Polyethylene terephthalate is a polymer alloy fiber with sea and polyphenylene sulfide is an island, polyphenylene sulfide is 10 to 60% by weight, the average diameter of the island is 1 to 100 nm, and the ratio of islands with a diameter of 1500 to 5000 nm is A blended yarn comprising a polymer alloy fiber of 0 to 5%, wherein the ratio of the polymer alloy fiber is 10 to 90% by weight.
(3) A polymer alloy fiber in which polyethylene terephthalate is the sea and polyphenylene sulfide is the island, and the ratio of the island of polyphenylene sulfide is 10 to 60% by weight, the average diameter of the island is 1 to 100 nm, and the diameter is 1500 to 5000 nm. A woven or knitted fabric containing 5 to 90% by weight of a polymer alloy fiber of 0 to 5%, wherein the pilling based on JIS L-1076 is grade 3 or higher.
(4) A polymer alloy fiber in which polyethylene terephthalate is sea and polyphenylene sulfide is island, polyphenylene sulfide is 10 to 60% by weight, average diameter of island is 1 to 100 nm, and the ratio of islands having a diameter of 1500 to 5000 nm is A woven or knitted fabric containing 5 to 90% by weight of a polymer alloy fiber of 0 to 5%, and having a claw value of 0.7 ° C · m ² · hr / kcal or more and excellent in heat retention.
(5) The cross-sectional shape of the polymer alloy fiber is a flat cross section, and the flatness is 1.5 to 20, the blended yarn according to (1), the blended yarn according to (2), or (3) or ( 4) The woven or knitted fabric described.
(6) The woven or knitted fabric according to any one of (3) to (5), comprising 10 to 95% by weight of polyester fiber and / or acrylic fiber and / or wool.
(7) The woven or knitted fabric according to any one of (3) to (6), wherein more yarns containing polymer alloy fibers float on one side of the woven or knitted fabric.
(8) The woven or knitted fabric according to any one of (3) to (7), which is dyed.
(9) A garment having at least a portion of the woven or knitted fabric according to any one of (3) to (8).

  The blended yarn / blend yarn or woven fabric containing the polymer alloy fiber of the present invention can achieve the improvement of abrasion resistance and dyeability, which are the problems of the conventional PPS woven fabric.

The PPS referred to in the present invention refers to a polymer having a repeating unit of a unit in which a sulfur atom (hereinafter abbreviated as S) is bonded to a phenyl group as described in JP-A-2004-231908, and is partially crosslinked. May be. Further, this repeating unit is preferably 70 mol% or more in the polymer, but other units may be contained in the range of 30 mol% or less as exemplified in JP-A-2004-231908 [Chemical Formula 2]. It is. In addition, the PPS used in the present invention is preferably a linear type having few molecular chain branch structures from the viewpoint of ensuring spinnability during production. Furthermore, it is preferable that the molecular chain end of PPS is blocked with a metal ion or the like, since the formation of gelled products and foreign matters due to the reaction with a sea polymer or the like can be suppressed. The molecular weight of PPS is not particularly limited as long as it can be spun, but a weight average molecular weight of 10,000 to 100,000 is preferable because both spinnability and yarn strength can be achieved. In the polymer alloy, if the viscosity of the PPS is set as low as possible, the island polymer is likely to be deformed by a shearing force. More specifically, the melt viscosity of PPS at 300 ° C. and 1216 sec ⁻¹ is preferably 200 Pa · s or less. The PPS used in the present invention can be obtained using a known method as described in JP-A No. 2004-231908.

  Here, it is important that the content of PPS in the polymer alloy fiber is 10 to 60% by weight. Thereby, the heat insulation and heat retention of PPS can be fully utilized. Furthermore, in order that PPS can exist stably as an island in the polymer alloy fiber, the content of PPS is preferably 15 to 45% by weight.

In the present invention, it is important that the polyethylene terephthalate is a polymer alloy fiber of sea and PPS is an island. The polymer alloy fiber referred to here may be a so-called polymer blend island component having a finite length, or a composite spinning island component having a substantially infinite length.

In the present invention, the diameter of PPS which is an island is important. In the present invention, it is important that the average diameter of the island PPS is 1 to 100 nm. Here, the average diameter of the island can be obtained as follows. First, the cross-sectional photograph of the polymer alloy fiber is subjected to image analysis or the like, and the circle equivalent diameter of each island is obtained from the cross-sectional area of each island. Then, the diameters of the randomly extracted islands are averaged on the basis of the area of the cross section, and the average diameter can be calculated therefrom. Here, when the average diameter is calculated by the number average, the contribution of the thin islands is excessively reflected. However, in order to increase the contribution of the thick island, the average diameter is determined by the area average in the present invention. More specifically, when the cross-sectional area of each island is S _i , the average cross-sectional area (S _av ) of the island is obtained from ΣS _i (i = 1 to n) / n, and the average diameter (D _av ) is calculated from the circle. ) _{Is obtained} by D _av = (4S _av / π) ^1/2 . n is preferably 300 or more because accuracy is improved.

By setting the average diameter of the island and less than 100 nm, Ru Nodea which can improve the coloring property of the polymer alloy fiber. The smaller the average diameter of the island, the better. However, when the average diameter of the island is 100 nm or less, a remarkable effect is exhibited. For example, when the diameter of the island PPS is 100 nm or less, it is theoretically transparent to visible light. Therefore, when the polymer alloy fiber is dyed, the color developability can be remarkably improved. Further, since the interface between the PPS and the sea polymer can be remarkably increased, the wear resistance can also be improved.

  In the present invention, it is important that the ratio of islands having an island diameter of 1500 to 5000 nm is 0 to 5% with respect to the total area of the entire island. Here, the ratio of islands having an island diameter of 1500 to 5000 nm can be obtained as follows. First, as with the average diameter, the diameter in terms of a circle is obtained based on the cross-sectional area of the island. And the ratio of the area of the whole island of diameter 1500-5000 nm with respect to the area of 300 or more whole islands extracted at random here is made into the ratio of the island whose diameter of an island is 1500-5000 nm in this invention. Here, by reducing the ratio of coarse islands having a diameter of 1500 to 5000 nm, it is possible to suppress the occurrence of the problem of PPS. The ratio of coarse islands having a diameter of 1500 to 5000 nm is preferably 2% or less, more preferably 0%. Further, it is preferable to lower the lower limit value of the coarse island, and as the coarse island, the ratio of the islands having a diameter of 500 to 5000 nm is preferably 0 to 5%, more preferably 2% or less, and further preferably 0%. Furthermore, as a coarse island, the ratio of islands having a diameter of 150 to 5000 nm is preferably 0 to 5%, more preferably 2% or less, and still more preferably 0%. Furthermore, as a coarse island, the ratio of islands having a diameter of 100 to 5000 nm is preferably 0 to 5%, more preferably 2% or less, and still more preferably 0%.

  Moreover, in the longitudinal section of the polymer alloy fiber of the present invention, the PPS is dispersed in a streak shape, whereby the specific surface area of the PPS can be increased and the heat retaining property can be improved. Here, streaky dispersion means a state where L / D, which is the ratio of the length (L) of the PPS to the island diameter (D), is 10 or more in the longitudinal section of the fiber. In the present invention, it is preferable that L / D is 100 or more because PPS hardly falls off from the polymer alloy fiber.

Thus, the problem peculiar to PPS can be suppressed to some extent by nano-dispersing PPS in polyethylene terephthalate which is a sea polymer. However, in the polymer alloy fiber, PPS is buried inside the fiber, so that the exposure of PPS on the surface of the woven or knitted fabric is reduced, and the heat insulating property and heat retention characteristic of PPS may be insufficient. For this reason, in order to expose PPS as much as possible on the surface of the woven or knitted fabric, it is preferable to increase the specific surface area of the polymer alloy fiber. For this purpose, it is effective to make the fibers extremely fine. In the polymer alloy fibers used in the present invention, the single fiber fineness is preferably 1.6 dtex or less. Further, if the polymer alloy fiber is made into a flat cross-sectional yarn and the surface of the woven or knitted fabric can be covered with the flat side of the flat cross-sectional yarn, a large amount of PPS can be exposed on the surface, which is preferable from the viewpoint of improving heat insulation and heat retention. The higher the flatness, the more effectively the PPS can be exposed on the surface. More specifically, the flatness is preferably 1.5 or more. On the other hand, the flatness is preferably 20 or less in order to give the woven or knitted fabric some tension and improve the texture of the woven or knitted fabric. Here, flatness is the ratio of the major axis length to the minor axis length in the polymer alloy fiber cross section. It is also effective to provide a hollow air yarn from the viewpoint of providing a dead air portion and improving heat retention. A larger hollow ratio at this time is preferable from the viewpoint of improving heat retention, and the hollow ratio is preferably 10% or more. On the other hand, in order to suppress hollow crushing in the woven or knitted fabric, the hollow ratio is preferably 60% or less. Here, the hollow ratio means the ratio of the area of the hollow portion to the cross-sectional area of the hollow fiber in the cross section of the polymer alloy fiber.

  As described above, it has been explained that the polymer alloy fiber in which PPS is dispersed at the nano level can solve the problem of PPS to some extent. However, when used in clothing, the above-mentioned polymer alloy fiber alone is insufficient to improve the characteristics. There is a case. For this reason, it is important to borrow the power of other fibers having excellent light fastness, dyeability and abrasion resistance by blending, blending, union, knitting and the like. In the present invention, by using a woven or knitted fabric in which the polymer alloy fiber and other fibers are mixed, blended, or knitted and knitted, the mechanical properties, dyeability, durability, texture, etc. of the woven fabric for clothing can be satisfied. It becomes possible. There are no particular restrictions on the fibers mixed with the polymer alloy fibers, general synthetic fibers such as polyester, nylon and acrylic, semi-synthetic fibers such as rayon and acetate, cotton, wool (wool, cashmere, alpaca, mohair, Angola, etc.), Natural fiber such as silk, PPS, aramid, liquid crystal polyester fiber, polyethylene, wholly aromatic polymer fiber, carbon fiber, etc., high heat resistance, flame retardant, high strength / high elastic modulus fiber, polyvinyl alcohol, synthetic fiber such as Eval, polyurethane And elastic yarns. However, it is preferable to mix with polyester, acrylic, and wool from the viewpoint of heat insulating clothing. Further, PPS can hardly be dyed with disperse dyes, acid dyes, cationic dyes, reactive dyes, metal-containing dyes, direct dyes and the like which are usually used for clothing. From this viewpoint, it is preferable to mix fibers having good dyeability for clothing. In order to balance heat retention, abrasion resistance, dyeability, etc., it is important that the mixing ratio of the polymer alloy fibers is 10 to 90% by weight in the mixed yarn and the mixed yarn, and 30 to 70%. The weight percent is also preferable because the balance between dyeability and texture is good. Similarly, it is important that the mixing ratio of the polymer alloy fibers in the woven or knitted fabric is 5 to 90% by weight, and if it is 7 to 20% by weight, a good balance between dyeability and texture is also preferable. Moreover, in order to improve heat retention, it is preferable that the woven or knitted fabric containing PPS nanofibers contains 10 to 95% by weight of polyester fiber and / or acrylic fiber and / or wool. More preferably, it is 80 to 90% by weight.

  In the blended yarn of the present invention, it is preferable that the polymer alloy fiber is disposed relatively outside in the blended yarn from the viewpoint of further improving heat retention. Further, when the polymer alloy fiber has a flat cross section, it is very easy to bend, so that it can be arranged so as to wrap the partner fiber, and it is preferable because the heat retaining property of PPS is more effectively expressed. More specifically, when the side surface of the mixed fiber is observed, the area of the portion covered with the polymer alloy fiber is preferably 30% or more with respect to the surface area of the mixed fiber. Furthermore, in order to develop a feeling of swelling or softness in the woven or knitted fabric and improve the texture, it is preferable that the yarn length difference between the polymer alloy fiber and the mixed fiber partner fiber is 3% or more. On the other hand, the yarn length difference is preferably 25% or less from the viewpoint of suppressing the generation of snags and pills (pills) and improving the quality and durability. Moreover, in order to improve the converging property of the yarn and to improve the process passability in the weaving and knitting process, it is preferable that 10 to 50 entanglements / m are provided.

  In the blended yarn of the present invention, it is preferable to set the fineness to 16S to 100S with a cotton count, since a woven or knitted fabric with a good texture can be obtained while improving heat retention.

  Further, in the woven or knitted fabric of the present invention, in order to more effectively use the heat retention by PPS, it is preferable that more yarns containing the polymer alloy fibers are floated on one side of the woven or knitted fabric. Thereby, the heat retention effect can be improved by the excellent heat insulating property of PPS. Here, the yarn containing the polymer alloy fiber means a mixed fiber or a mixed yarn containing the polymer alloy fiber, or a yarn made of 100% of the polymer alloy fiber. Further, the fact that the yarn containing the polymer alloy fiber is more floated on one side of the woven or knitted fabric means that the area occupied by the yarn containing the polymer alloy fiber is larger than the area occupied by the other fibers on the surface of the woven or knitted fabric. It is. For example, when back satin is woven using a blended yarn containing the polymer alloy fiber as a warp and a polyester fiber having a trilobal cross section as a weft, the back side of the fabric has many blended yarns containing the polymer alloy fiber with excellent heat retention. On the contrary, the front side can be made into a woven structure in which a lot of polyester fibers excellent in gloss, abrasion resistance and light resistance are floated.

  Moreover, in the woven or knitted fabric of the present invention, a double structure fabric such as a double weave or a double knitting can be used to enclose a large amount of dead air in the fabric and further improve the heat retention.

  Further, it is preferable to use a polymer alloy fiber having a flat cross section because PPS can be more efficiently exposed on the surface of the fabric. The area covered by the polymer alloy fiber having a flat cross section is more preferably 40% or more with respect to the fabric surface area.

The knitted or knitted fabric of the present invention can improve the dyeability by mixing fibers having excellent dyeability other than PPS fibers. From the viewpoint of dyeability, it is preferable to mix with polyester, nylon, wool, silk and the like. The dyed woven or knitted fabric of the present invention preferably has an L ^* value of 7 to 15 when deep black such as formal wear is required, and has a C ^* value of 10 when clear coloring such as outer is required. The above is preferable. Of course, it can also be dyed in pastel colors for applications such as inners, shirts, pants and sweaters.

  In the present invention, since PPS is embedded in the polymer alloy fiber in nano size, when the fiber is rubbed, PPS which is an island may be pulled out from the polymer alloy fiber as fibril. However, since this fibril is nano size, one fibril is used. It is very weak and easily falls off from the polymer alloy fiber. For this reason, unlike the blended yarn containing the conventional PPS fiber etc., it is the feature that it is hard to generate | occur | produce a hair ball, ie, a pill, and is excellent in anti-pill property. The anti-pill property of the woven or knitted fabric can be measured based on JIS L-1076. In the present invention, at most the PPS ratio can be anti-pill tertiary or higher. In the conventional PPS blended yarn, when the PPS ratio in the woven or knitted fabric is 16 weights or more, it is not easy to make the anti-pill grade 3. However, in the present invention, even if the PPS ratio is 16 weight% or more, the anti-pill grade 3 or more can do. The anti-pill is preferably grade 4 or higher.

Moreover, it is preferable that the heat retention of the woven or knitted fabric of the present invention is 0.7 ° C. · m ² · hr / kcal or more in a so-called claw value. A higher claw value is preferable for better heat retention. However, if the heat is too high, it may be uncomfortable, and therefore, it is preferably 20 ° C. · m ² · hr / kcal or less. Here, the claw value is Gage A.I. P. Burton A. L. One claw is one of the methods for evaluating heat retention proposed by the group, and keeps the skin temperature of a person sitting on a chair indoors at an air temperature of 21 ° C, a humidity of 50% or less, and a wind speed of 5 cm / sec at an average of 33 ° C. It is defined as the thermal insulation necessary for

The actual evaluation method is to put a sample between two constant temperature bodies of 40 ° C. high temperature side constant temperature T _H (° C.) and 20 ° C. low temperature side temperature constant temperature T _L (° C.) and wait until it reaches a steady state. The heat flow rate B (kcal / m ² · hr) flowing from the high temperature side constant temperature body to the low temperature side constant temperature body is measured and determined by the following formula.

Claw value _{^{(℃ · m 2 · hr /}} kcal) = (T H -T L) / (0.18 × B)
Although the manufacturing method of this polymer alloy fiber used by this invention is not specifically limited, For example, the following manufacturing methods can be used suitably.

First, it is important to obtain a polymer alloy fiber having PPS as an island and polyethylene terephthalate as the sea, but it is important to disperse PPS as finely and uniformly in the sea polymer as possible. For this reason, kneading of polymers is extremely important, and in the present invention, it is preferable to highly knead by a kneading extruder, a static kneader or the like. It should be noted that the simple chip blend described in Japanese Patent Application Laid-Open No. 61-252315 or the like is insufficient in kneading, so that it is difficult to finely and uniformly disperse islands as in the present invention.

As a guide in performing specific kneading, in the case of using a mixed kneading extruder, it is preferable to use a biaxial extrusion kneader, when using a stationary kneader is that the number of divisions to be 1,000,000 or more Is preferred. Moreover, in order to avoid blend spots and fluctuations in the blend ratio over time, it is preferable to measure each polymer independently and supply the polymers to the kneading apparatus independently. At this time, the polymer may be supplied separately as pellets, or may be supplied separately in a molten state. Two or more kinds of polymers may be supplied to the root of the extrusion kneader, or may be a side feed that supplies one component from the middle of the extrusion kneader.

  When a twin screw extrusion kneader is used as the kneading apparatus, it is preferable to achieve both high kneading and suppression of the polymer residence time. The screw is composed of a feeding part and a kneading part, but it is preferable that the kneading part has a length of 20% or more of the effective length of the screw so that high kneading can be achieved. Moreover, excessive shear stress can be avoided and the residence time can be shortened by setting the length of the kneading part to 40% or less of the effective screw length. Further, the kneading part is positioned as close as possible to the discharge side of the twin-screw extruder, so that the residence time after kneading can be shortened and re-aggregation of the island polymer can be suppressed. In addition, when strengthening kneading, it is possible to provide a screw having a backflow function for sending the polymer in the reverse direction in an extrusion kneader.

  In addition, by directly connecting the twin-screw extrusion kneader and the spinning machine, the re-aggregation of the island after kneading can be suppressed to some extent, so it may be advantageous to make the island finer than when pelletized once. .

Further, in order to finely disperse the island PPS with an island diameter of several tens of nanometers, the combination of the polymers is also important, and it is preferable to select a polymer having compatibility with PPS as much as possible. Also, since PPS has a high melting point of about 280 ° C., the sea polymer is preferably one that has a small thermal decomposition even at 300 ° C. or higher, and a polymer that has a weight loss rate of 5% or less when held at 300 ° C. for 5 minutes is preferable. Furthermore, the melt viscosity of the sea polymer is also important. As described above, since PPS is a high melting point polymer, the kneading temperature and the spinning temperature are 300 ° C. or higher. Therefore, it is preferable to maintain a sufficient melt viscosity even at this temperature. More specifically, when a polymer having a melt viscosity of 150 Pa · s or higher at 300 ° C. and 1216 sec ⁻¹ is used as a sea polymer, sufficient shear can be applied to the island PPS, and the island PPS can be refined and uniformly dispersed. Is preferred for. On the contrary, if the viscosity of the PPS forming the island is set as low as possible, the island polymer is likely to be deformed by a shearing force. More specifically, the melt viscosity of PPS at 300 ° C. and 1216 sec ⁻¹ is preferably 200 Pa · s or less.

Although it is also possible to Datsuumi from the polymer alloy fibers obtain PPS nanofibers, it is possible to reduce the environmental impact by using those aqueous as Datsuumi solvent is A alkali hydrolyzed with the sea polymer Polyester is used . JP-A-2004-162244 describes that PPS nanofibers can be obtained by eluting nylon 6 from polymer alloy fibers using PPS as an island and nylon 6 as a sea, using formic acid. Formic acid is a very difficult solvent because it has a low boiling point and a high vapor pressure, so there is a high risk of explosion and it is also corrosive. For this reason, although it is possible to obtain PPS nanofibers in beaker level experiments as described in this document, if an attempt is made to obtain a sufficient amount of PPS nanofibers for producing a clothing fabric, It is necessary to newly introduce a large-scale solvent recovery / treatment facility, which not only increases the cost but also increases the environmental load, and it is not easy to actually obtain a clothing fabric composed of PPS nanofibers.

In view of the above, the present invention is in the sea polymer Ru with high viscosity polyethylene terephthalate capable alkaline hydrolysis.

  In addition, an appropriate compatibilizing agent can be used to make the dispersion diameter of PPS fine. For example, when a silane coupling agent type or epoxy type is used, the island diameter of the PPS can be set to 50 nm or less.

  When spinning the PPS polymer alloy used in the present invention, the cooling condition of the yarn is also important. Since the polymer alloy is a very unstable molten fluid, it is preferable to quickly cool and solidify after discharging from the die. For this reason, it is preferable that the distance from a nozzle | cap | die to the cooling start shall be 1-15 cm. Here, the start of cooling means a position where positive cooling of the yarn is started, but in the actual melt spinning apparatus, it is replaced with this at the upper end of the chimney.

In addition, when polyethylene terephthalate, which is different in chargeability from PPS, is used as the sea polymer, static electricity is likely to be generated in the polymer alloy fiber. In order to improve the process stability at the time of fibering, it is preferable to use substances such as fatty acid esters and polyethers as the main component as the process oil.

The spun polymer alloy fiber is preferably subjected to stretching and heat treatment, but the preheating temperature during stretching is preferably equal to or higher than the glass transition temperature (T _g ) of the PPS, so that the yarn unevenness can be reduced. .

  The polymer alloy fiber used in the present invention is preferably a method for producing a long fiber when obtaining a blended yarn, but is preferably a method for producing a short fiber (staple fiber) when obtaining a blended yarn. .

  When using long fiber manufacturing equipment, it is essential to wind up the polymer alloy fiber. At this time, in order to improve the unwindability of the yarn in the next process, the package shape of the wound yarn must be changed. It is preferable to arrange appropriately. Especially in the case of a cheese package, it is important to set the winding stress. By setting the winding stress in the range of 0.05 to 0.2 cN / dtex, a good package with less earing, twilling, and hardness distribution within the package. Can be obtained. Further, in order to improve the converging property of the yarn, it is preferable to give 1 to 15 pieces / m in the spinning stage and 1 to 50 pieces / m in the drawing stage.

  When using a staple fiber manufacturing apparatus, it is preferable to pay attention to the following points. When the polymer alloy fibers are aligned to form a tow with a total fineness of 50,000 dtex or more, it becomes a thick fineness of 400 dtex or more at the spinning stage. It is preferable from the viewpoint of improvement. However, at this time, it is preferable from the viewpoints of productivity improvement and spinnability improvement that the number of nozzle holes is 200 or more and the single fiber fineness of the polymer alloy is 1 to 10 dtex. In addition, when the number of holes in the base is 200 or more, the diameter of the base is 140 mm or more, which is larger than the diameter of the base used in so-called long fibers used for woven and knitted fabrics. Moreover, in the spinning of the present invention, rapid cooling is preferable. The temperature distribution of may increase. For this reason, it is preferable to employ a spinning spinning temperature lower than the spinning temperature employed in normal PPS in order to suppress yarn breakage and fluctuations in yarn physical properties due to differences in polymer viscosity depending on the base hole position. As a result, the difference between the atmospheric temperature and the spinning temperature is reduced, and variations due to the cap hole position can be suppressed.

  In addition, when the toe fineness which consists of a polymer alloy fiber exceeds 10,000 dtex, it is preferable to set it as steam extending | stretching rather than the dry heat extending | stretching currently used with the long fiber. This is due to heat transfer between fibers in dry heat drawing, and uniform heat transfer to the vicinity of the center in the tow cross section may be insufficient, whereas in steam drawing, high-temperature steam fills the gaps between fibers. Therefore, heat transfer efficiency is high, heat can be uniformly transmitted to the vicinity of the center of the tow, and the tow can be stretched uniformly.

  Then, the drawn tow is guided to a crimper, subjected to mechanical crimping, and cut into fiber lengths of 31 to 70 mm to obtain raw cotton made of polymer alloy fibers. Here, by setting the number of crimps of the raw cotton to 5-40 piles / 25 mm, not only the card passing property which is the next step is improved, but also the openability of the raw cotton here is improved, and in the spinning step It is preferable because it is easy to draft and the mechanical properties and form stability of the spun yarn can be improved.

  Next, an example of a fiber mixing method will be described. The polymer alloy fiber obtained as described above is mixed with other fibers, and various known methods such as alignment, air mixing, composite false twisting, and twisting can be used as the mixing method. . In this case, in order to dispose the polymer alloy fiber relatively outside in the mixed fiber, the polymer alloy fiber is supplied to the fiber mixing device at a higher overfeed rate than other fibers, or the polymer alloy fiber is used. This can be achieved by composite false twisting with other fibers having lower elongation. In addition, a Taslan nozzle, an interlace nozzle, or a swirling airflow nozzle can be used as the air fiber mixture, but an interlace nozzle is used in order to improve the thread convergence and improve the processability in the knitting process. It is preferable to use about 10-50 pieces / m. In addition, when performing composite false twisting, it is preferable to use a yarn having an elongation of 50% or more higher than that of the other fibers as the polymer alloy fiber because the polymer alloy fiber is easily disposed on the outside of the mixed yarn.

  Next, an example of a blending method will be described. The polymer alloy raw cotton obtained as described above and raw cotton made of other fibers are weighed so as to have a desired blending ratio, mixed and put into a card to open the raw cotton and to align short fibers. And this can be mixed with a spinning machine while giving a draft.

  Next, 100% of the polymer alloy fibers or mixed yarn or mixed yarn is knitted or knitted. However, in order to improve the dyeability and mechanical strength of the fabric, it is preferable to knit or knit with other fibers. At this time, a dyed yarn or the like can be used as the other fiber, or a knitted knitted yarn can be used to improve the texture.

As described above, PPS nanofibers can also be obtained by removing the sea polymer polyethylene terephthalate from the polymer alloy fiber. And since the PPS nanofibers obtained here have a much larger specific surface area than conventional PPS fibers, they can carry a larger amount of UV absorbers than conventional PPS fibers and improve light resistance. You can also. Further, since the PPS fiber itself becomes thin, it easily falls off due to wear, and does not make a hair pill unlike conventional PPS fibers, and can improve the anti-pill property. In particular, from the viewpoint of carrying an ultraviolet absorber, the thinner the nanofiber, the better the specific surface area of the nanofiber, which is preferable. Furthermore, since the frequency (number) of voids between single fibers is increased, the carrying amount of the ultraviolet absorber can be improved. Moreover, since the space | gap between single fibers becomes smaller, it can encapsulate a ultraviolet absorber and can improve washing durability, and is preferable. From these viewpoints, the average diameter of PPS nanofiber single fibers is 100 nm or less , and in the present invention, the ratio of single fibers having a PPS single fiber diameter of 1500 to 5000 nm is 0 to 5% in the nanofiber aggregate. der Ru.

  Here, the ultraviolet absorber can be selected within a range that does not impair the object of the present invention, but the ultraviolet absorber described in JP-A-2004-285517 [Chemical I] and [Chemical II] is preferably used. be able to. Furthermore, a covering agent described in JP-A-2003-278017 [Chemical Formula 10] to [Chemical Formula 13] can also be used.

  The woven or knitted fabric containing the polymer alloy fiber of the present invention is not only excellent in heat retention, but also excellent in abrasion resistance, light fastness, dyeability and color development. It can be used for a wide range of purposes as clothing. In particular, it is suitable for socks, heat insulation underwear, shirts, etc., as a universal design that makes use of heat retention. Furthermore, it can be suitably used not only for clothing but also for materials such as curtains and partitions that make use of heat insulation and flame retardancy due to PPS.

  Hereinafter, the present invention will be described in detail with reference to examples. In addition, the measuring method in an Example used the following method.

A. Polymer melt viscosity The polymer melt viscosity was measured by Toyo Seiki Capillograph 1B. The polymer storage time from sample introduction to measurement start was 10 minutes.

B. Melting | fusing point The peak top temperature which shows melting | fusing of a polymer by 2nd run using Perkin Elmaer DSC-7 was made into melting | fusing point of a polymer. The temperature rising rate at this time was 16 ° C./min, and the sample amount was 10 mg.

C. Weight loss rate of polymer TG / DTA6200 manufactured by Seiko Instruments Inc. was used to measure the weight loss rate when heated from room temperature to 300 ° C at 10 ° C / min in a nitrogen atmosphere and then held at 300 ° C for 5 minutes. did.

D. Fiber cross-sectional observation by TEM Ultra-thin sections were cut in the cross-sectional direction of the fiber, and the fiber cross-section was observed with a transmission electron microscope (TEM). Metal staining was applied as needed.

TEM apparatus: H-7100FA type manufactured by Hitachi, Ltd. Average diameter of island in polymer alloy fiber A cross-sectional photograph of the polymer alloy fiber by TEM was image-analyzed by image analysis software WINROOF, and the circle-converted diameter of each island was obtained from the cross-sectional area of each island. Then, the randomly extracted island diameters were averaged on a cross-sectional area basis, and the average island diameter was calculated from this. For the average, data from 300 islands were used.

F. Ratio of islands in desired diameter range The total of the areas of 300 islands used in the average diameter analysis was first calculated (total island area). Next, in this, the sum of the area of the island in a desired diameter range was calculated (island area). Then, [(island area) / (total island area)] × 100 (%) was defined as a ratio of islands in a desired diameter range.

G. SEM observation A platinum-palladium alloy was deposited on the fiber, and the side surface of the fiber was observed with a scanning electron microscope.

SEM apparatus: Hitachi S-4000 type Worcester spots of polymer alloy fibers (U%)
Measurement was performed in the normal mode at a yarn feeding speed of 200 m / min using a USTER TESTER 4 manufactured by Zerbegger Worcester.

I. Mechanical properties of the fiber The mechanical properties of the fiber were determined as follows. At room temperature (25 ° C.), an initial sample length = 200 mm, a pulling speed = 200 mm / min, and a load-elongation curve was obtained under the conditions shown in JIS L1013. Next, the load value at break was divided by the initial fineness, which was used as the strength, and the elongation at break was divided by the initial sample length to obtain a strong elongation curve.

J. et al. The number of crimps of the fiber was sampled 50 mm, the number of peaks and valleys between 25 mm in the vicinity of the center was counted, and the number of crimps was determined by halving this. Actually, the average value of n = 5 was used as the number of crimps of the fiber.

K. Anti-pill property of woven or knitted fabric Measurement was performed based on JIS L-1076.

L. Light resistance of woven or knitted material Measurement was performed based on JIS L-0842.

M.M. Claw value of woven and knitted fabric What is claw value? P. Burton A. L. One claw is one of the methods for evaluating heat retention proposed by the group, and keeps the skin temperature of a person sitting on a chair indoors at an air temperature of 21 ° C, a humidity of 50% or less, and a wind speed of 5 cm / sec at an average of 33 ° C. It is defined as the thermal insulation necessary for

The actual evaluation method is to put a sample between two constant temperature bodies of 40 ° C. high temperature side constant temperature T _H (° C.) and 20 ° C. low temperature side temperature constant temperature T _L (° C.) and wait until it reaches a steady state. The heat flow rate B (kcal / m ² · hr) flowing from the high temperature side constant temperature body to the low temperature side constant temperature body is measured and determined by the following formula.

Claw value _{^{(℃ · m 2 · hr /}} kcal) = (T H -T L) / (0.18 × B)
Reference example 1
Melt viscosity 280Pa · s (300 ℃, 1216sec -1) 80 wt% of PET of melt viscosity 160Pa · s (300 ℃, 1216sec -1) as 20% by weight of PPS, a biaxial extrusion kneader under the following conditions Used for melt kneading. Here, the PPS used was a linear type and the molecular chain terminal was replaced with calcium ions. Further, the weight reduction rate when the PET used here was held at 300 ° C. for 5 minutes was 0.9%.

Screw L / D = 45
The kneading part length is 34% of the effective screw length
The kneading part was dispersed throughout the screw.
There are two back flow parts in the middle. Polymer supply PPS and PET are weighed separately and supplied separately to the kneader Temperature 300 ° C
No vent The polymer alloy melt obtained here was introduced into a spinning machine as it was, and was spun. At this time, the polymer alloy melt was filtered with a metal nonwoven fabric having a spinning temperature of 315 ° C. and a limit filtration diameter of 15 μm, and then melt-spun from a die having a die surface temperature of 292 ° C. At this time, as the base, a nozzle having a discharge hole diameter of 0.6 mm provided with a measuring portion having a diameter of 0.3 mm above the discharge hole was used. And the discharge amount per single hole at this time was 1.1 g / min. Furthermore, the distance from the base lower surface to the cooling start point was 7.5 cm. The discharged yarn is cooled and solidified over 1 m with a cooling air of 20 ° C., and after the process oil agent mainly composed of fatty acid ester is supplied, it is 1000 m / min through the non-heated first take-up roller and the second take-up roller. It was wound up. The spinnability at this time was good, and there was no yarn breakage during continuous spinning for 24 hours. In addition, the winding stress at this time was a winding stress of 0.08 cN / dtex, and a cheese package with good peptification was obtained with no earing, twilling, or hardness distribution in the package. This was subjected to a stretching heat treatment with the temperature of the first hot roller being 100 ° C. and the temperature of the second hot roller being 130 ° C. At this time, the draw ratio between the first hot roller and the second hot roller was 3.3 times. The obtained polymer alloy fiber exhibited excellent properties of 100 dtex, 48 filaments, strength 4.4 cN / dtex, elongation 27%, U% = 1.3%. Moreover, the photograph which observed the cross section of the obtained polymer alloy fiber by TEM is shown in FIG. 1, and PPS as an island was uniformly dispersed with a diameter of less than 100 nm in PET which is a sea polymer. Moreover, when the circle-equivalent diameter of the island was analyzed by the image analysis software WINROOF, the average diameter of the island was 65 nm, and the ratio of islands having a diameter of 100 nm or more was 0%.

Reference example 2
Spinning and stretching were performed in the same manner as in Reference Example 1 with a PET blending ratio of 60% by weight, a PPS blending ratio of 40% by weight, a stretch ratio of 3.1 times, and 100 dtex, 72 filaments, strength 4.4 cN / dtex. Excellent properties of 26% elongation and U% = 1.4% were exhibited. Moreover, when the cross section of the obtained polymer alloy fiber was observed by TEM, it was found that PPS was uniformly dispersed as islands in PET, which is a sea polymer. Further, when the circle-converted diameter of the island was analyzed with the image analysis software WINROOF, the average diameter of the island was 76 nm, the ratio of the island having a diameter of 100 nm or more was 7%, and the ratio of the island having a diameter of 150 nm or more was 0% (island diameter). The maximum value was 116 nm).

Reference example 3
Using a product having an I-shaped discharge hole as a die, and changing the discharge amount, spinning was performed at a spinning speed of 2300 m / min in the same manner as in Reference Example 1 to obtain a flat cross-sectional yarn of 100 dtex, 36 filaments with a flatness of 4 It was. At this time, the winding stress was 0.08 cN / dtex, and a cheese package with good peptidation was obtained with no earing, twilling, or hardness distribution in the package. The obtained polymer alloy fiber exhibited excellent properties of strength 2.3 cN / dtex, elongation 155%, U% = 1.8%. Moreover, when the cross section of the obtained polymer alloy fiber was observed by TEM, PPS was dispersed uniformly as an island with a diameter of less than 100 nm in PET, which was a sea polymer. Further, when the circle-converted diameter of the island was analyzed by the image analysis software WINROOF, the average diameter of the island was 68 nm, and the ratio of islands having a diameter of 100 nm or more was 0%.

Reference example 4
Melt-kneading was carried out under the same conditions as in Reference Example 1 with a PPS blend ratio of 40 wt% and a PET blend ratio of 60 wt%, to obtain polymer alloy pellets once. The polymer alloy pellets were dried and then put into a spinning machine. The polymer alloy pellets were melted at 315 ° C. and led to a spin block with a spinning temperature of 315 ° C. The polymer alloy melt was filtered with a metal nonwoven fabric having a limit filtration diameter of 15 μm, and then melt-spun from a die having a die surface temperature of 292 ° C. At this time, as the base, a nozzle having a discharge hole diameter of 0.6 mm provided with a measuring portion having a diameter of 0.3 mm above the discharge hole was used. And the discharge amount per single hole at this time was 1.1 g / min. Furthermore, the distance from the base lower surface to the cooling start point was 10 cm. The discharged yarn is cooled and solidified over 1 m with a cooling air of 20 ° C., and after the process oil agent mainly composed of fatty acid ester is supplied, it is 1000 m / min through the non-heated first take-up roller and the second take-up roller. As a result, 20 yarns were collected and dropped into a yarn box. The spinnability at this time was good, and there was no yarn breakage during continuous spinning for 24 hours. Furthermore, 40 of these were collected to form a tow composed of polymer alloy fibers, and steam stretching at 100 ° C. was performed. At this time, the draw ratio was 2.8 times. The obtained polymer alloy fiber tow was 770,000 dtex. Here, one yarn was taken out and steam-stretched under the above conditions and measured for physical properties. As a result, excellent properties such as a strength of 4.0 cN / dtex, an elongation of 35%, and U% = 1.5% were exhibited. Moreover, when the cross section of the obtained polymer alloy fiber was observed by TEM, it was found that PPS was uniformly dispersed as islands in PET, which is a sea polymer. Further, when the circle-converted diameter of the island was analyzed by the image analysis software WINROOF, the average diameter of the island was 80 nm, the ratio of the island having a diameter of 100 nm or more was 8%, and the ratio of the island having a diameter of 150 nm or more was 0%.

Reference Example 5
PPS having a weight average molecular weight of 50,000 was melt-spun at a spinning temperature of 320 ° C. and spun at a take-up speed of 800 m / min to obtain an undrawn yarn, and these were combined. Then, steam stretching was performed at 100 ° C. and 3.2 times to obtain a PPS tow having a single fiber fineness of 1 dtex (single fiber diameter: 12 μm) and a tow fineness of 100,000 dtex.

Example 1
The polymer alloy fiber obtained in Reference Example 1 was subjected to pin false twisting at a false twist number of 2000 turns / m, a hot plate temperature of 220 ° C., a draw ratio of 1.01 times, and a processing speed of 100 m / minute to obtain a polymer alloy false twisted yarn. Obtained. Separately, 84 dtex, 36 filament PBT false twisted yarn was prepared. Then, a polymer alloy false twisted yarn is supplied at an overfeed rate of 8% and a PBT false twisted yarn is supplied at an overfeed rate of 0%, and air entangled at a fluid treatment pressure of 0.4 MPa using an interlace nozzle. A blended yarn in which false twisted yarn was disposed relatively outside the blended yarn was obtained. The weight ratio of the polymer alloy fibers in the mixed yarn was 56%, the yarn length difference was 5%, and the entanglement degree was 15 pieces / m.

Next, using this polymer alloy mixed yarn and the PBT false twisted yarn, a circular knitted fabric having a backside honeycomb reversible knitted structure was knitted in the same manner as in Japanese Patent Application Laid-Open No. 2004-285517. This knitted fabric was refined by a conventional method, subjected to an intermediate set at 180 ° C., and then dyed gray according to a conventional method. This circular knitting exhibited excellent properties such as anti-pill grade 4. Further, the claw value was 0.9 ° C. · m ² · hr / kcal, indicating sufficient heat retention. Further, when polymer alloy fibers containing PPS were drawn from this circular knitting and the cross section thereof was observed by TEM, the average diameter of the islands was 70 nm, and the ratio of islands having a diameter of 100 nm or more was 0%. The weight ratio of the polymer alloy fibers in this circular knitting was 40% by weight.

  Next, socks were produced using this circular knitting, and the texture and heat retention were good.

Example 2
The polymer alloy fiber obtained in Reference Example 2 is false twisted and mixed in the same manner as in Example 1 , and the mixed yarn with PBT false twisted yarn with a polymer alloy fiber weight ratio of 56% and an entanglement degree of 15 pieces / m. Got. In this blended yarn, the polymer alloy fiber was disposed relatively outside the blended yarn, and the yarn length difference was 5%. This was subjected to an additional twist of 300 turns / m. Next, a 2/1 twill was produced using the 30th wool as the warp and the mixed yarn as the weft. This fabric was dyed black by a conventional method. This fabric exhibited anti-pill grade 3 and excellent properties. Further, the claw value was 0.8 ° C. · m ² · hr / kcal, indicating a sufficient heat retention. Moreover, when the polymer alloy fiber containing PPS was pulled out from this fabric and the cross section thereof was observed with a TEM, the average diameter of the islands was 80 nm, and the ratio of islands having a diameter of 150 nm or more was 0%. The weight ratio of the polymer alloy fibers in this fabric was 20% by weight.

  Next, a bottom was produced using this woven fabric, but the texture and heat retention were good.

Example 3
The polymer alloy fibers obtained in Reference Example 3 and ordinary PET fibers (84 dtex, 24 filaments) with an elongation of 42% are entangled by air interlace nozzles and combined to obtain a draw ratio of 1.05 times, a heater temperature of 190 ° C., and triaxial A composite false twist was performed using a friction disk of No. 4 as a rotor and a processing speed of 400 m / min. At this time, the fiber overfeed rate during air entanglement before false twisting was 5%, the entanglement pressure was 0.5 MPa, the twisting stress was 0.29 cN / dtex, and the untwisting stress was 0.19 cN / dtex. There was no problem in workability, and there were no yarn breakage, untwisting, fluff, etc. The blended yarn obtained here was a so-called core-sheath blended yarn in which polymer alloy fibers are usually entangled with PET fibers. The yarn length difference at this time was 18%. In addition, the polymer alloy fiber forming the sheath part has a flat portion facing the outside of the blended yarn, and the PET fiber is usually wrapped with the polymer alloy fiber, and the area of the part covered with the polymer alloy fiber is The surface area of the mixed yarn was 40%. Furthermore, a twisted yarn of 300 T / m is applied to the blended yarn, and 2/1 twill is woven using a normal PET fiber false twisted yarn (156 dtex, 48 filaments) as a weft to obtain a living machine. It was. In accordance with a conventional method, scouring and intermediate setting were performed, followed by dyeing. Furthermore, a finishing set was applied. The mixed yarn was extracted from the woven fabric obtained here, and the difference in the yarn length was measured and found to be 20%. Moreover, the area which a polymer alloy fiber occupies on one side of this fabric was 60% or more. This woven fabric has a rich swell and tension that is not found in conventional PET fabrics, and also exhibits excellent properties such as anti-pill grade 4. Further, the claw value was 0.9 ° C. · m ² · hr / kcal, indicating sufficient heat retention. Moreover, when the polymer alloy fiber containing PPS was pulled out from this fabric and the cross section thereof was observed by TEM, the average diameter of the islands was 73 nm, and the ratio of the islands having a diameter of 100 nm or more was 0%. Further, 30% by weight of polymer alloy fiber containing PPS was mixed in the woven fabric.

  Although the bottom was produced using this fabric, it was excellent in heat retention and durability.

Example 4
The tow obtained in Reference Example 4 was guided to a crimper, crimped with 12 crimps / 25 mm, and then cut to a fiber length of 51 mm. Separately, a cotton raw cotton (single yarn fineness of about 2.0 to 2.2 dtex, fiber length of 28 to 32 mm) was prepared and blended with polymer alloy raw cotton to obtain a spun yarn having a cotton count of 70 s. The weight ratio of the polymer alloy fibers in the spun yarn was 40%.

A circular knitted fabric having a back surface-side honeycomb reversible knitted structure was knitted from the spun yarn and wool having a count of 70. The polymer alloy fiber containing PPS in the circular knitting was 15% by weight. Furthermore, this circular knitting was dyed pastel pink according to a conventional method. This circular knitting exhibited excellent properties such as anti-pill grade 4. Further, the claw value was 1.0 ° C. · m ² · hr / kcal, indicating sufficient heat retention. When polymer alloy fibers containing PPS were drawn from this circular knitting and the cross section thereof was observed by TEM, the average diameter of the islands was 85 nm, and the ratio of islands having a diameter of 150 nm or more was 0%.

  This circular knitting was used to make a warm underwear for women, but it was a good texture and warmth.

Comparative Example 1
The PPS tow obtained in Reference Example 5 was cut into a fiber length of 51 mm, and a woven fabric having a warp double structure was prepared in the same manner as in Example 1 of Japanese Patent Application Laid-Open No. 2004-244768 with a blending rate of PPS of 15% by weight. This was an anti-pill grade 2 and inferior in durability.

Comparative Example 2
Melt spinning and stretching heat treatment were carried out in the same manner as in Reference Example 1 with a PPS blend ratio of 70 wt% and a PET blend ratio of 30 wt% to obtain polymer alloy fibers having PPS as the sea and PET as the islands. This was circular knitted and dyed by a conventional method. However, since PPS was in the sea, both dyeability and color development were poor.

Comparative Example 3
The polymer alloy fiber produced in Reference Example 2 was used for warp and weft to produce a plain weave of 100% polymer alloy fiber, but it was anti-pill grade 2 and poor in durability.

Comparative Example 4
According to the description in Example 1 of JP-A-2-99658, a sea-island composite spun fiber was produced using polystyrene as the sea and PPS as the island. In this composite fiber, the diameter of the island PPS was 2.5 μm. And this composite yarn was used for warp and weft to produce a plain weave, which was inferior in anti-pill class 1 and durability.

Reference Example 6
The circular knitting obtained in Example 1 was subjected to alkaline hydrolysis treatment and neutralization using 98% at 10 ° C. in 10% by weight sodium hydroxide aqueous solution with 5% owf of “Merseline PES” manufactured by Meisei Chemical Co., Ltd. as a weight loss accelerator. Then, it was washed with hot water, and the sea polymer PET was completely removed from the polymer alloy fiber to obtain a circular knitting composed of a double structure containing 10% by weight of PPS nanofibers.

  Fibers were extracted from the obtained circular knitting, and the cross section of the fibers was observed with a TEM. As a result, the average diameter was 71 nm, and the ratio of diameters of 100 nm or more was 0%. Further, when the side surface of the PPS nanofiber was observed with an SEM, L could not be determined in the visual field range because the length (L) of the PPS nanofiber was large, and L / D was 100 or more. Moreover, the thing whose L / D is 10 or less was zero. Furthermore, this PPS nanofiber was a thing which has no branch at all.

  Next, 2- (2'-hydroxy-3'-tert-butyl-5'-methylphenyl) -5-chlorobenzotriazole was exhausted from the circular braid as an ultraviolet absorber. At this time, an aqueous treatment solution of 2% by weight of an ultraviolet absorber and 0.5% by weight of a polyoxyalkylene / styrene oxide adduct-based dispersant was prepared and exhausted at 130 ° C. for 50 minutes.

Furthermore, this circular knitting was dyed in gray according to a conventional method. This circular knitting exhibited excellent properties such as anti-pill grade 4 and light fastness grade 4 based on JIS L-842. Further, the claw value was 0.9 ° C. · m ² · hr / kcal, indicating sufficient heat retention.

  Socks were produced using this circular knitting, but the texture and heat retention were good.

It is a figure which shows the cross section of the polymer alloy fiber of the reference example 1. FIG.

Claims (9)

Polyethylene terephthalate is a polymer alloy fiber in which polyphenylene sulfide is an island, polyphenylene sulfide is 10 to 60% by weight, the average diameter of the island is 1 to 100 nm, and the ratio of islands having a diameter of 1500 to 5000 nm is 0 to 5 % Blended yarn containing polymer alloy fibers in an amount of 10% to 90% by weight. Polyethylene terephthalate is a polymer alloy fiber in which polyphenylene sulfide is an island, polyphenylene sulfide is 10 to 60% by weight, the average diameter of the island is 1 to 100 nm, and the ratio of islands having a diameter of 1500 to 5000 nm is 0 to 5 % Blended yarn containing polymer alloy fibers in an amount of 10% to 90% by weight. Polyethylene terephthalate is a polymer alloy fiber in which polyphenylene sulfide is an island, polyphenylene sulfide is 10 to 60% by weight, the average diameter of the island is 1 to 100 nm, and the ratio of islands having a diameter of 1500 to 5000 nm is 0 to 5 % Of woven or knitted fabric containing 5 to 90% by weight of polymer alloy fiber, and the pilling based on JIS L-1076 is grade 3 or higher. Polyethylene terephthalate is a polymer alloy fiber in which polyphenylene sulfide is an island, polyphenylene sulfide is 10 to 60% by weight, the average diameter of the island is 1 to 100 nm, and the ratio of islands having a diameter of 1500 to 5000 nm is 0 to 5 % Woven or knitted fabric containing 5 to 90% by weight of polymer alloy fiber and having a claw value of 0.7 ° C. · m ² · hr / kcal or more and excellent in heat retention.   The cross-sectional shape of the polymer alloy fiber is a flat cross section, and the flatness is 1.5 to 20. The blended yarn according to claim 1, the blended yarn according to claim 2, or the weave according to claim 3 or 4. knitting.   The woven or knitted fabric according to any one of claims 3 to 5, comprising 10 to 95% by weight of polyester fiber and / or acrylic fiber and / or wool.   The woven or knitted fabric according to any one of claims 3 to 6, wherein more yarns containing polymer alloy fibers float on one side of the woven or knitted fabric.   The woven or knitted fabric according to any one of claims 3 to 7, which is dyed.   The clothing which has at least one part the woven or knitted fabric of any one of Claims 3-8.