TW201634770A - Moisture absorbent core sheath composite yarn - Google Patents

Abstract

A moisture absorbent core sheath composite yarn having a sheath portion polymer that is a polyamide and a core portion that is a thermoplastic polymer, and having a moisture absorbance/desorbance ([Delta]MR) of 5.0%, wherein the [Delta]MR maintenance rate after 20 washes is 90-100%. A core sheath composite fiber having high moisture absorbance, being more comfortable than natural fibers, and having wash resistance with moisture absorbance that stands up to real use and color fastness is provided.

Description

Hygroscopic core sheath composite wire

The present invention relates to an absorbent core-sheath composite yarn excellent in washing resistance.

A synthetic fiber composed of a thermoplastic resin such as polyamide or polyester is excellent in strength, chemical resistance, heat resistance, and the like, and is widely used for clothing use, industrial use, and the like.

In particular, polyamine fibers are excellent in hygroscopicity in addition to their unique softness, high tensile strength, color developability at the time of dyeing, and high heat resistance, and are widely used in underwear, sportswear, and the like. However, if the polyamide fiber is compared with a natural fiber such as cotton, it is difficult to say that the moisture absorption is sufficient, and there is a problem of sultry heat or stickiness, which is a problem in that the comfort is inferior to the natural fiber.

From such a background, it is excellent in moisture absorption and moisture absorption, and has a synthetic fiber close to the comfort of natural fibers, and is mainly expected to be used for underwear use or sportswear.

Here, the method of adding a hydrophilic compound to the polyamide fiber is generally reviewed at the most. For example, Patent Document 1 proposes a method in which polyvinylpyrrolidone as a hydrophilic polymer is blended in polyamine to improve moisture absorption performance by spinning.

On the other hand, the structure of the fiber is a core-sheath structure, and a thermoplastic resin having a highly hygroscopic thermoplastic resin is provided on the core portion and excellent in mechanical properties. It is the core sheath structure of the sheath, and actively carries out a review of both the moisture absorption performance and the mechanical properties.

For example, Patent Document 2 discloses a core-sheath composite fiber in which a core portion composed of a core portion and a sheath portion is a core-sheath composite fiber which is not exposed to the surface of the fiber, and a hard segment is a 6-nylon polyether. The segmented guanamine copolymer is a core portion, and the 6-nylon resin is a sheath portion, and the area ratio of the core portion to the sheath portion of the fiber cross section is 3/1 to 1/5.

In addition, the patent document 3 discloses a core-sheath type composite fiber which is excellent in hygroscopicity, and is a core-sheath type composite fiber in which a thermoplastic resin is a core portion and a fiber-forming polyimide resin is a sheath portion; The main component of the thermoplastic resin forming the core portion is a polyether ester decylamine, and the ratio of the core portion is 5 to 50% by weight based on the total weight of the composite fiber.

Further, Patent Document 4 discloses a conjugate fiber having a moisture absorption and desorption property, which is characterized in that a polyimide or a polyester is used as a sheath component, and a thermoplastic water-absorbent resin composed of a crosslinked product of polyethylene oxide is used. Core composition.

Further, Patent Document 5 describes a core-sheath composite cross-section fiber excellent in antistatic property, water absorption performance, and contact cold feeling, which is a polyether block guanamine copolymer as a core, a polyamide or a polyester, or the like. The fiber-forming polymer is used as a sheath portion, and the core portion is exposed at an exposure angle of 5 to 90 degrees.

Further, Patent Document 6 discloses a flat core-sheath composite fiber excellent in hygroscopicity, and a hydrophilic component such as a polyether ester guanamine compound or a polyether ester compound is used as a core portion and a fiber forming property such as polyester. The polymer acts as a sheath and has a flatness of 1.05 to 3.0.

In addition, a technique for improving the moisture absorption property of the polyamide fiber has also proposed a method of attaching a hydrophilic compound to the surface of the fiber and infiltrating the inside by post-processing, but the method of improving the moisture absorption performance by post-processing has a hydrophilicity due to washing. The problem that the compound is detached and the hygroscopic property is lowered.

[Previous Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. Hei 9-188917

Patent Document 2: International Publication No. 2014/10709

Patent Document 3: Japanese Patent Laid-Open No. Hei 6-136618

Patent Document 4: Japanese Patent Laid-Open No. Hei 8-209450

Patent Document 5: International Publication No. 2008/123586

Patent Document 6: Japanese Patent Laid-Open Publication No. 2000-239918

However, although the fiber described in Patent Document 1 has a moisture absorption/desorption property close to that of a natural fiber, its performance cannot be sufficiently satisfied, and there is a problem that a higher moisture absorption and desorption property is achieved.

Further, the core-sheath composite fibers of Patent Documents 2 to 6 have the same moisture absorption and desorption properties as those of the natural fibers, but the core portion is deteriorated due to repeated use, and the moisture absorption performance is lowered due to repeated use. problem. Further, since the high moisture absorption and desorption polymer of the core portion is a polymer structure in which the dye enters and exits easily, there is a disadvantage that the dyeing fastness is poor.

In addition, the core-sheath composite fiber described in Patent Document 2 relates to contact cold feeling, and nylon 6 is used for the sheath portion. However, there is no change from the general nylon 6 and there is a problem that further contact with cold feeling is achieved. The core-sheath composite fiber described in Patent Document 5 relates to the contact cold feeling, and the water-insoluble polyethylene oxide modified product is used in the core portion. However, the polymer moisture absorption performance of the core portion causes a low cold feeling and is Polyamine coated in the sheath, Therefore, there is no change from the general polyamine, and there is a problem of achieving further contact with cold feeling. The core-sheath composite fiber described in Patent Document 6 is related to the contact cold feeling, and the novel dry hand is obtained by flattening the cross section of the fiber, improving the contact area with the skin, and multiplying the moisture absorption performance. However, since it is coated with the polyester of the sheath portion, the contact cold feeling can be obtained under the general polyester, but it is inferior to the general polyamine. In the case where the sheath portion is made into polyamine, the novel dry hand is obtained by increasing the contact area with the skin and the effect of the moisture absorption performance, but the performance is still insufficiently satisfied. Further contact with the subject of cold feeling.

SUMMARY OF THE INVENTION The object of the present invention is to overcome the problems of the above-mentioned prior art and to provide: washing resistance and dyeing fastness with high moisture absorption property and contact cold sensibility, and having superior comfort over natural fibers, and capable of withstanding the moisture absorption performance of actual use. Core-sheath composite wire that is in contact with cold and washable.

The present invention has the following constitutions in order to solve the above problems.

(1) A core-sheath composite yarn, wherein the sheath portion polymer is polyamine, the core portion is a thermoplastic polymer, and the moisture absorption and desorption (ΔMR) is 5.0% or more, and the ΔMR retention rate after washing 20 times It is 90% or more and 100% or less.

(2) The core-sheath composite yarn according to (1), wherein the washing fastness is 3 or more and 5 or less.

(3) The core-sheath composite yarn according to (1) or (2), wherein the sheath-polymer polyamide has an α-crystal alignment parameter of 1.9 or more and 2.7 or less, and the thermoplastic polymer of the core is Polyetheresteramine copolymer.

(4) The core-sheath composite yarn according to any one of (1) to (3), wherein the amount of the amine terminal group of the sheath portion of the core-sheath composite yarn is 3.5 × 10 ^-5 mol / g or more And 8.0 × 10 ^-5 mol / g or less.

(5) The core-sheath composite yarn according to any one of (1) to (4), wherein the flatness is 1.5 or more and 5.0 or less.

(6) The core-sheath composite yarn according to any one of (1), wherein the entire fiber contains 0.1 to 5% by weight of the inorganic particles.

(7) The core-sheath composite yarn according to the above aspect, wherein the α-crystal alignment parameter of the sheath polymer is 1.7 or more and 2.6 or less.

The core-sheath composite yarn according to any one of (6), wherein the sheath polymer contains 0.2 to 6% by weight of the inorganic particles.

The core-sheath composite yarn according to any one of (6), wherein the inorganic particles are titanium oxide.

(10) A fabric comprising at least a portion of the core-sheath composite yarn according to any one of (1) to (9).

According to the present invention, it is possible to provide a washing property which is high in moisture absorbing property and contact cold sensibility, and which has superior comfort to the natural fiber, can withstand the moisture absorption property of the actual use, and is excellent in washing resistance and dye fastness and contact cold sensitivity. Core sheath composite wire.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a core-sheath composite yarn of an I-shaped cross-sectional shape according to a preferred embodiment of the present invention.

Fig. 2 is a schematic view showing a core-sheath composite yarn of a convex lens type cross-sectional shape according to a preferred embodiment of the present invention.

The core-sheath composite silk-based sheath polymer of the present invention is a polyamide and the core is a thermoplastic polymer, and the moisture absorption and desorption (ΔMR) is 5.0% or more, and the ΔMR retention rate after washing 20 times is 90. More than 100% and less than 100% of the core sheath composite yarn.

The core-sheath composite yarn of the present invention uses polyamine in the sheath portion and a thermoplastic polymer in the core portion.

As the thermoplastic polymer, a known polymer can be used, and a thermoplastic polymer having high moisture absorption properties is particularly preferred. The thermoplastic polymer having high hygroscopicity in the core refers to a polymer having a moisture absorption/desorption (ΔMR) of 10% or more as measured by particle shape, and examples thereof include a polyether ester guanamine copolymer or Polyvinyl alcohol, cellulose-based thermoplastic resin, and the like. Among them, a polyether ester guanamine copolymer is preferred from the viewpoints of good thermal stability or compatibility with the sheath polyamine and excellent peeling resistance.

The polyether ester guanamine copolymer is a block copolymer having an ether bond, an ester bond, and a guanamine bond in the same molecular chain. More specifically, one or two or more kinds of polyamine components (A) and a dicarboxylic acid are selected from the salts of mesalamine, aminocarboxylic acid, diamine, and dicarboxylic acid. A block copolymer polymer obtained by a polycondensation reaction with a polyether ester component (B) composed of a poly(alkylene oxide) diol.

The polydecylamine component (A) is an indoleamine such as ε-caprolactam, dodecylamine or eleven indoleamine; aminocaproic acid, 11-aminoundecanoic acid, An ω-amino carboxylic acid such as 12-aminododecanoic acid; a nylon salt of a diamine-dicarboxylic acid such as nylon 66, nylon 610 or nylon 612, preferably a polyamine. The sexual component is ε-caprolactam.

Among them, the polyether ester component (B) is composed of a dicarboxylic acid having 4 to 20 carbon atoms and a poly(alkylene oxide) glycol. Examples of the dicarboxylic acid having 4 to 20 carbon atoms include aliphatic dicarboxylic acids such as succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, sebacic acid, and dodecanedioic acid; For an aromatic dicarboxylic acid such as citric acid, isophthalic acid or 2,6-naphthalenedicarboxylic acid; or an alicyclic dicarboxylic acid such as 1,4-cyclohexanedicarboxylic acid, one type may be used or may be used in combination 2 More than one species. Preferred dicarboxylic acids are adipic acid, sebacic acid, dodecanedioic acid, p-nonanoic acid, isodecanoic acid. Further, examples of the poly(alkylene oxide) glycol include polyethylene glycol, poly(1,2- and 1,3-epoxypropane)diol, and poly(tetramethylene oxide)diol (poly( Tetramethylene oxide), poly(oxymethylene) glycol, etc., particularly preferred are polyethylene glycols having good hygroscopic properties.

The number average molecular weight of the poly(alkylene oxide) diol is preferably from 300 to 10,000, more preferably from 500 to 5,000. When the molecular weight is 300 or more, it is less likely to be spattered outside the system during the polycondensation reaction, and it is preferred because it has a fiber having stable moisture absorption properties. Moreover, when it is 10,000 or less, a uniform block copolymer is obtained, and spinnability is stable, and it is preferable.

The composition ratio of the polyether ester component (B) in the polyether ester guanamine copolymer is preferably from 20 to 80% in terms of the molar ratio in the entire copolymer. If it is 20% or more, good hygroscopicity can be obtained, which is preferable. Further, when it is 80% or less, good dye fastness or washing resistance can be obtained, which is preferable.

Such a polyether ester guanamine copolymer is commercially available as "MH1657" or "MV1074" manufactured by ARKEMA.

Examples of the sheath polyamines include nylon 6, nylon 66, nylon 46, nylon 9, nylon 610, nylon 11, nylon 12, nylon 612, etc., or a compound having such a guanamine functional group, for example, containing ten. A copolymerized polyamine of a copolymerization component such as diendammine, azelaic acid, p-nonanoic acid, isophthalic acid or sodium 5-isophthalic acid sulfonate. Among them, from the viewpoint of a small difference in melting point between the polyetheresteramine copolymer and a thermal deterioration of the polyetheresteramine copolymer at the time of melt spinning, and spinnability, nylon 6 and nylon 11 are preferred. , nylon 12, nylon 610, and nylon 612. Among them, it is preferably dye-rich Nylon 6.

In the sheath polyamine of the present invention, it is more preferable to contain a moisture absorbent from the viewpoint of improving hygroscopicity. For exemplifying the moisture absorbent, polyvinylpyrrolidone, polyether decylamine, polyalkylene glycol, polyether ester decylamine or the like can be used, and polyvinylpyrrolidone is particularly preferred. The degree of polymerization of the polyvinylpyrrolidone is preferably in the range of 20 to 70. Here, the K value is a relative viscosity of a polyvinylpyrrolidone aqueous solution, and the relative viscosity obtained by a capillary viscometer is measured as a K value of a so-called Fickentscher (DIN 53726). This value is related to the molecular weight of polyvinylpyrrolidone and is known from the prior art for determining the molecular weight of polyvinylpyrrolidone. When the K value is 20 or more, it is preferred because it has a strong entanglement with the polyamide molecular chain and a stable moisture absorption and desorption property. On the other hand, when the K value is 60 or less, the viscosity increase can be suppressed when kneading into the polyamide, and it is preferable from the viewpoint of spinnability. Better range of 20 to 60.

Further, the content of the polyvinylpyrrolidone is preferably from 3 to 7% by weight based on the sheath polyamine. By setting it as 3% by weight or more, it is possible to move moisture from the skin to the fiber side at the time of wearing, and it is possible to impart a slippery feel. By setting it as 7% by weight or less, it is possible to provide a cloth having excellent washing fastness and strength which is excellent in actual use.

In the sheath polyamine of the present invention, the total additive content may be between 0.001 and 10% by weight, and if necessary, copolymerizing or mixing various additives such as a matting agent, a flame retardant, an antioxidant, and an ultraviolet absorbing agent. Agent, infrared absorber, crystal nucleating agent, fluorescent whitening agent, antistatic agent, carbon, and the like.

The core-sheath composite yarn of the present invention has a function of adjusting the humidity in the clothes in order to obtain good comfort when worn. The humidity adjustment index is the difference between the moisture absorption rate of the clothes represented by 30 °C × 90% RH and the external temperature and humidity represented by 20 °C × 65% RH in light-to-medium operation or light-to-medium exercise. The suction Dehumidification (ΔMR). The larger the ΔMR, the higher the moisture absorption performance, which corresponds to good comfort when worn.

The ΔMR of the core-sheath composite yarn of the present invention is preferably 5.0% or more. More preferably, it is 7.0% or more, particularly preferably 10.0% or more, and the best system is 15.0% or more. By setting it within this range, the stuffiness or stickiness at the time of wearing can be suppressed, and the clothing which is excellent in comfort can be provided. Further, the ΔMR level which can be achieved by the present invention is about 17.0%.

The moisture absorption/desorption (ΔMR) is 5.0% or more, and it can be achieved by using a polymer having a ΔMR of 10% or more as measured by the particle shape.

The ΔMR retention ratio after the core sheath composite yarn of the present invention is washed 20 times is preferably 90% or more and 100% or less. More preferably, it is 95% or more and 100% or less. By setting it within this range, the washing resistance which can withstand practical use can be obtained, and the clothing which maintains the excellent comfort can be provided. In addition, when the ΔMR is 5.0% or more and the ΔMR retention rate after washing 20 times is 90% or more, it is possible to provide an excellent clothing having wear resistance and comfort that can withstand practical use.

The ΔMR retention ratio after washing 20 times is 90% or more and 100% or less, which is achieved by setting the α crystal alignment parameter of the sheath polyamine described later to an optimum value.

By setting the ΔMR of the core-sheath composite yarn of the present invention to this range, it is possible to exhibit an antistatic property due to entanglement during wearing or less dust adhesion due to static electricity. In other words, since the filament of the thermoplastic polymer having a high moisture absorption property in the core portion is continuously disposed in the fiber axis direction, the antistatic mechanism is exhibited by the moisture in the air, even in a low-temperature and low-humidity environment (for example, 20 ° C × Good antistatic properties are still obtained with 40% RH).

The core sheath composite yarn of the invention is rubbed in a environment of 20 ° C × 40% RH The friction-charged electrostatic potential is preferably 0 V or more and 1500 V or less. More preferably, it is 0 or more and 1000 V or less. The lower the friction band voltage, the better the antistatic performance. Generally, the polyimide fiber has a friction band voltage of about 4500 to 5500 V in a 20 ° C × 40% RH environment. By setting it within this range, it is possible to provide a clothing material which is excellent in antistatic property, that is, excellent in comfort, due to entanglement during wearing or less dust adhesion due to static electricity.

The core-sheath composite yarn of the present invention preferably has a washing fastness (discoloration, discoloration) of 3 or more and 5 or less. By setting it as this range, the washability which can withstand actual use can be acquired, and it can provide the coating material which is excellent in dye-fastness.

The washing fastness (discoloration, discoloration) is set to 3 or more and 5 or less, and the α-crystal alignment parameter of the sheath polyamine described later and the amount of the amine-based terminal group of the sheath polymer are the most Good value can be achieved.

The core-sheath composite yarn of the present invention preferably has a α-crystal alignment parameter of a sheath-like polyamine which is 1.9 or more and 2.7 or less, and a thermoplastic polymer-based polyetheresteramine copolymer of a core. The sheath polyamine is preferably a stable crystalline alpha crystal which is formed upon application of high stress. In order to be able to set it within this range, by performing spinning under specific conditions (composition ratio or viscosity ratio of the core sheath, etc.) as described later, the sheath polyamine is preferentially applied to stretch from the spinning, and The extension of the sheath portion is preferentially applied between the take-up rolls, so that a stable crystal type α-form crystal exists in the sheath portion. As a result, the staining strength after dyeing of the core-sheath composite yarn increased, and the dyeing fastness was improved. Further, the stretching force at the time of spinning concentrates on the sheath polyamine, and it is preferable to suppress the crystallization of the thermoplastic polymer having a high moisture absorption property in the core portion and to improve the moisture absorption performance of the core-sheath composite yarn.

When the core thermoplastic polymer-based polyether ester decyl copolymer is formed by crystallization, the polyether ester component is locally formed, and the alkaline liquid is partially localized. Since the durability is inferior, the α-crystal alignment parameter of the sheath polyamine is set to the range, and the crystallization of the core polyether ester guanamine copolymer is suppressed, and the washing resistance capable of withstanding the actual hygroscopic property can be exhibited. Sex.

When the α crystal alignment parameter is 1.9 or more, the sheath polyamide is crystallized, the dyeing fastness is good when the composite yarn is formed, and the core thermoplastic polymer having a high moisture absorption property in the core does not undergo crystallization. It has good moisture absorption performance. Further, in the case of the polyetheresteramine copolymer, since the crystallization is not performed, the washing resistance which can withstand the actual use of the moisture absorbing property is good. On the other hand, when the α crystal alignment parameter is 2.7 or less, the sheath polyamine does not undergo crystallization, and the occurrence of yarn breakage or fuzzing during spinning can be suppressed, so that productivity can be improved. More preferably, it is 2.00 or more and 2.60 or less, and it is more preferably 2.05 or more and 2.60 or less.

The core-sheath composite yarn of the present invention preferably has an amine group terminal group amount of 3.5 × 10 ^-5 mol/g or more and 8.0 × 10 ^-5 mol/g or less. If the hydrophilic amino terminal group content is 3.5×10 ^-5 mol/g or more, the moisture absorption property is high, so that it is preferable, and since the amine terminal group becomes a dyeing seat, it can be suitably used. Color development or dye fastness for clothing applications. On the other hand, when the amount of the terminal group of the amine group is 8.0 × 10 ^-5 mol/g or less, it is preferred because fibers which are less likely to be stained during dyeing are used. More preferably, it is 4.2 × 10 ^-5 mol / g or more and 8.0 × 10 ^-5 mol / g or less, and particularly preferably 4.5 × 10 ^-5 mol / g or more and 8.0 × 10 ^-5 mol / g or less.

The core-sheath composite yarn of the present invention uses a thermoplastic polymer having high hygroscopic property in the core, thereby improving thermal conductivity and exhibiting a cold contact feeling more easily than the polyamine amine monofilament. The contact coldness is dependent on the heat flow rate per unit area of the low temperature side fiber after the fiber has just contacted the skin. Polyamide is an organic substance with a low thermal conductivity. Even if it is made into clothes and directly worn on the skin, it will not actually feel. Touch the cold feeling. In order to improve the feeling of contact with the cold, by forming a cross-sectional shape with a large contact area, an additive containing a high thermal conductivity, etc., it is possible to provide excellent contact coldness in addition to moisture absorption performance, and to maintain superior comfort. Sexual clothing.

The core-sheath composite yarn of the present invention preferably has a flat cross-sectional shape of the core-sheath composite yarn and a flatness of 1.5 or more and 5.0 or less.

Since the contact coldness is dependent on the heat flow rate per unit area, the heat of movement depends on the contact area, the shape of the cross section of the larger contact area (Fig. 1) or the shape of the convex lens (Fig. 2), or the like. In the cross-sectional shape, the flatness is preferably 1.5 or more. The term "flatness" as used herein refers to the ratio of the diameter of the circumscribed circle (R in Figs. 1 and 2) to the diameter of the inscribed circle (r in Figs. 1 and 2). The higher the flatness, the more the cold feeling is contacted, and the flatness is more preferably 2.0 or more. On the other hand, as the flatness is increased, the wire strength tends to decrease, and the flatness must be 5.0 or less.

The core-sheath composite yarn of the present invention preferably contains 0.1 to 5% by weight of inorganic particles in the entire fiber. Contact cold feeling is that after the fiber touches the skin, the heat accumulated on the skin side moves to the fiber on the low temperature side, so the thermal conductivity is higher than that of polyamine, and the low heat capacity inorganic compound preferably contains 0.1 in the fiber. ~5 wt%.

The reason why the inorganic compound is selected in the present invention is that it does not cause adverse effects during the production or dyeing of the core-sheath composite yarn, and that the properties of the filament, the light resistance, and the like are not caused to cause coloring of the polymer during use. The above-mentioned adverse effects are not mentioned until the inorganic compound of the core-sheath composite yarn is not affected. If an inorganic compound having a higher thermal conductivity than polyamine and having a low heat capacity is exemplified, barium sulfate, titanium oxide, aluminum oxide, zirconium oxide, calcium oxide, magnesium oxide, aluminum nitride, boron nitride, and nitrogen are exemplified. Zirconium, aluminum silicate, zirconium carbide, and the like. Among these inorganic compounds, in view of fiber physical properties, color developability, ease of use of inorganic particles, and high-order workability, barium sulfate and titanium oxide are preferred. Magnesium oxide, aluminum oxide.

When the content of the inorganic compound is too small, the thermal conductivity cannot be improved, so that it is difficult to improve the contact cold feeling, and it is preferably set to 0.1% by weight or more in the entire fiber. Moreover, the more the contact cold feeling is improved, the lower the tensile strength of the silk property is, and the higher-order workability is lowered. Therefore, it is preferably set to 5% by weight or less. More preferably, it is 0.3 to 3% by weight. The special system is 0.3 to 2.0% by weight.

The contact coldness is as described above, depending on the heat flow rate of the heat accumulated on the skin side to the low temperature side fiber immediately after the fiber touches the skin. In the case of the core-sheath composite yarn of the present invention, preferably, after the core-sheath composite wire has just touched the skin, the heat accumulated on the skin side is transferred to the sheath portion of the low-temperature side core-sheath composite wire, and then moved to the low-temperature side core-sheath composite wire. The sheath. Since the thermal conductivity of the sheath polyamine is low, even if the garment is directly worn on the skin, it does not feel cold contact, and the thermal movement of the polymer toward the core polyetheresteramine copolymer is not Smoothly.

Therefore, the sheath polyamine has a thermal conductivity higher than that of polyamine, and preferably contains 0.2 to 6% by weight of the inorganic compound having a low heat capacity. With this configuration, the heat energy from the skin can be moved to the side of the core sheath composite yarn at the time of wearing, and the core polyether ester amide can be copolymerized from the sheath polyamine of the core-sheath composite yarn toward the core. The thermal mobility of the complex polymer proceeds smoothly, and the contact cold feeling is obtained. The more the content of the inorganic compound is, the more the contact cold feeling can be improved, and the effect of contact with the cold feeling, the spinnability, the silk property, and the like are more preferably 0.2 to 3% by weight.

In the present invention, the core material comprises 0.1 to 5% by weight of the core-sheath composite yarn of the inorganic particles, and the α-type crystal alignment parameter of the sheath-like polyamine is preferably 1.7 to 2.6. The α-type crystal of the sheath polyamine is a stable crystal form, and when a core-sheath composite yarn is produced, an α-form crystal is formed when a high stress is applied. In order to be able to be set within this range, as will be described later Spinning is carried out according to specific conditions (composition ratio or viscosity ratio of the core sheath, etc.), and the elongation of the sheath polyamine is preferentially applied when drawing from the spinning, and the extension of the sheath portion is preferentially applied between the drawing rolls. A stable crystalline α-form crystal is present in the sheath.

By setting the α-crystal alignment parameter of the sheath polyamine to be within this range, the stain strength after dyeing of the core-sheath composite yarn can be improved, and the dye fastness is good, and the stretching force during spinning is concentrated on the sheath portion. Polyamine inhibits crystallization of the core polyether ester guanamine copolymer polymer, and is a core-sheath composite yarn excellent in moisture absorption performance and contact cold feeling. Further, it is possible to suppress crystallization of the core polyether ester guanamine copolymer, and to suppress the formation of a localized structure due to crystallization of the core polyether ester component, and to maintain durability against an alkaline liquid. The washing performance can still maintain the moisture absorption performance and the contact cold feeling.

If the α-crystal alignment parameter of the sheath polyamine is 1.7 or more, the sheath polyamide will be crystallized, the dyeing fastness of the core-sheath composite yarn is good, and the core polyether ester guanamine copolymer will not Crystallization is carried out to make the moisture absorption performance and the contact cold feeling good. Further, since the core polyetheresteramine copolymer is not crystallized, the moisture absorption performance and the contact cold feeling can be maintained even by washing. On the other hand, if the α-type crystal orientation parameter of the sheath polyamine is 2.6 or less, the sheath polyamide does not undergo crystallization, and when high-order processing is performed, the occurrence of yarn breakage or fuzzing can be suppressed, thereby improving production. Sex. More preferred is 1.8~2.5, and the best is 1.85~2.5.

The tensile strength of the core-sheath composite yarn of the present invention is preferably 2.5 cN/dtex or more. More preferably 3.0cN/dtex or more. By setting it as this range, it can provide the clothing material which can withstand the intensity|strength of the actual use, especially when it is used for the clothing materials, such as underwear fabrics and sports clothing use.

The core-sheath composite yarn of the present invention preferably has a degree of elongation of more than 35%. Better 40 to 65%. By setting it within this range, for example, weaving, knitting, false twisting, etc. can be made high. The steps in the step are smooth.

The total fineness and the number of filaments of the core-sheath composite yarn of the present invention are not particularly limited. When a long fiber material for clothing is used, it is preferred that the total fineness of the multifilament yarn is 5 dtex or more and 235 dtex or less, and the number of filaments is 1 Above and 144 monofilament or less.

The core-sheath composite yarn of the present invention can be obtained by a known method of melt spinning or composite spinning, and can be exemplified as follows.

For example, a polyamine (sheath) and a thermoplastic polymer (core) having a high hygroscopic property are separately melted and transported by a gear pump, and in this state, a core-sheath structure is obtained by a usual method. The composite flow is formed and discharged from the spinning nozzle, and the cooling air is blown by a yarn cooling device such as a chimney to cool the yarn to room temperature, and the oil is supplied to the oil supply device, and the first one is used. The fluid communication nozzle device performs entanglement and passes through the pulling roller and the stretching roller, and at this time, the circumferential speed ratio of the pulling roller and the stretching roller is extended. Further, the yarn was heat-set by a stretching roll, and then wound up by a winder (winding device).

In order to set the α-type crystal alignment parameter of the sheath portion of the core-sheath composite yarn of the present invention within this range, in addition to selecting a polymer, by controlling the core-sheath recombination ratio at the time of spinning, the core-sheath polymer viscosity, The extension step or the like can be achieved.

The core ratio of the core-sheath composite yarn of the present invention is required to be 20 parts by weight to 80 parts by weight based on 100 parts by weight of the composite yarn. More preferably, it is 30 parts by weight to 70 parts by weight. By setting it within this range, an appropriate extension can be applied to the sheath polyamine. Further, good dye fastness and moisture absorption performance can be obtained. If it is less than 20 parts by weight, sufficient moisture absorption performance cannot be obtained. On the other hand, when it exceeds 80 parts by weight, not only the surface of the fiber is easily cracked by swelling due to swelling in a hot water environment, but also excessive elongation is applied to the sheath polyamine, and the target α-type crystal alignment parameter cannot be obtained. Again, produced The spinning and elongation of the degree of tension may be implicated in the occurrence of broken or raised hair, which is not preferable for stably producing the target fiber.

The polyamidamide fragments used in the sheath portion of the present invention are required to be 2.3 or more and 3.3 or less in terms of sulfuric acid relative viscosity. It is preferably 2.6 or more and 3.3 or less. By setting within this range, a suitable extension can be applied to the sheath polyamine. If the relative viscosity of sulfuric acid is 2.3 or more, not only the practical strength of the raw silk can be obtained, but also the optimal elongation is applied, so that the sheath polyamide can be crystallized, and the α-type crystal alignment parameter becomes an appropriate value to improve the dyeing fastness. Therefore, it is better. On the other hand, if the relative viscosity of sulfuric acid is 3.3 or less, since it is a melt viscosity suitable for spinning, it can be produced according to the spinning temperature suitable for the thermoplastic polymer having a high moisture absorption property in the core, which is preferable.

The fragment of the thermoplastic polymer having high hygroscopic property used in the core of the present invention is preferably 1.2 or more and 2.0 or less in terms of relative chlorophenol relative viscosity. When the relative viscosity of o-chlorophenol is 1.2 or more, the sheath portion is optimally stretched, and the sheath polyamine is crystallized, and the α-crystal alignment parameter is an appropriate value, which is less likely to cause breakage or fuzzing, which is preferable. On the other hand, when the relative viscosity of o-chlorophenol is 2.0 or less, the core portion is not excessively stretched, and the sheath polyamide is crystallized, and the α-type crystal alignment parameter becomes an appropriate value to improve the dye fastness. good.

In the extending step, the yarn speed (spinning speed) by the pulling roller is preferably a product of a stretching ratio of the ratio of the peripheral speed of the pulling roller to the stretching roller, and is a mode of 3300 m/min or more and 4500 m/min or less. Set the spinning conditions. More preferably, it is 3500 m/min or more and 4500 m/min or less, and it is more preferably 4000 m/min or more and 4500 m/min or less. This numerical value indicates the total amount of extension of the polymer discharged from the spinneret from the nozzle discharge linear velocity to the peripheral speed of the pulling roller and from the peripheral speed of the pulling roller to the peripheral speed of the stretching roller. By setting it within this range, the sheath can be The polyamine is applied with an appropriate extension. When it is 3300 m/min or more, not only the sheath polyamide can be crystallized, the dyeing fastness is improved, and the core has a high moisture absorption property, and the thermoplastic polymer does not crystallize, and the moisture absorption performance is easily improved. On the other hand, when it is 4,500 m/min or less, not only the sheath polyamine is moderately crystallized, but also a predetermined degree of crystallization can be formed, and the occurrence of yarn breakage or fuzzing at the time of yarn production is small, which is preferable.

In the oil supply step, the spinning oil agent supplied by the oil supply device is preferably a non-aqueous oil agent. A thermoplastic polymer having a high moisture absorption property in the core has a ΔMR of 10% or more, and has excellent moisture absorption performance. Therefore, when a non-aqueous oil agent is supplied, moisture in the air is gradually absorbed, and swelling is not easy. It is preferable to carry out stable coiling.

In the core-sheath composite yarn of the present invention, the inorganic particles are preferably contained in an amount of 0.1 to 5% by weight based on the entire fiber. In order to control the inorganic particles within the range, it is possible to control the inorganic particles to be contained in either or both of the sheath polyamine and the core polyether ester guanamine copolymer.

In order to improve the contact cold feeling, it is preferred that after the core-sheath composite wire has just touched the skin, the heat accumulated on the skin side moves to the sheath portion of the low-temperature side core-sheath composite wire, and then moves to the core of the low-temperature side core-sheath composite wire. Thereby, the contact feeling of cold can be improved. That is, it is preferred that the sheath polyamine contains inorganic particles. In this case, the sheath polyamine preferably contains 0.2 to 6% by weight of the inorganic particles. By setting it as the range, the heat from the skin can be moved to the side of the core-sheath composite yarn at the time of wearing, and the sheath polyamine from the core-sheath composite yarn can be smoothly moved toward the core polyetheresteramine copolymer. The molecules move thermally to maintain contact coldness and maintain contact coldness even after washing. The more the content of the core inorganic particles is, the more the contact cold feeling can be improved, but it is more preferably 0.2 to 3% by weight from the viewpoint of the effect of contact with cold feeling, high-order workability, silk property, and the like.

Further, in a thermoplastic polymer (core portion) such as a polyamide (sheath) or a polyether ester amide copolymer, a method of containing a high concentration and uniformly containing inorganic particles may be exemplified by mixing and melting inorganic particles. a method of granules, a method of blending a masterbatch containing a high concentration of inorganic particles in a granule, a method of adding inorganic particles to a polymer in a molten state, and kneading, or a stage before or during polymerization of a polymer The method of adding inorganic particles to a raw material or a reaction system, etc., is a method of suppressing secondary aggregation of inorganic particles added at a high concentration and uniformly dispersing them, and it is particularly preferable to add inorganic particles to polymerization of a polymer.

Since the core-sheath composite yarn of the present invention is excellent in moisture absorption property and contact cold feeling, it can be preferably used for clothing articles. The form of the fabric can be selected to match the knitting, knitted fabric, non-woven fabric, and the like. As described above, the larger the ΔMR, the higher the moisture absorption performance, which corresponds to the good comfort at the time of wearing. Therefore, at least a part of the fabric having the core-sheath composite yarn of the present invention can adjust the mixing ratio of the core-sheath composite yarn of the present invention so that the ΔMR becomes 5.0% or more, thereby providing a fabric having excellent comfort. Further, as described above, the contact cold feeling corresponds to the smooth movement of the fibers immediately after the fibers touch the skin. Therefore, by making the core-sheath composite yarn of the present invention into a fabric design that comes into contact with the skin, it is possible to provide a fabric having excellent comfort. The clothing material can be used as a variety of clothing materials such as underwear and sportswear.

[Examples]

Hereinafter, the present invention will be more specifically described by way of examples. Further, the method of measuring the characteristic value in the examples is as follows.

(1) Relative viscosity of sulfuric acid

The sample was 0.25 g in a manner of 1 g relative to a concentration of 98 wt% sulfuric acid 100 ml. Dissolved, and the flow time (T1) at 25 ° C was measured using an Oswald viscometer. Next, the down time (T2) at a concentration of only 98% by weight of sulfuric acid was measured. The ratio of T1 to T2, that is, T1/T2 is set to the relative viscosity of sulfuric acid.

(2) Relative viscosity of o-chlorophenol

0.5 g of the sample was dissolved in an amount of 1 g with respect to 100 ml of o-chlorophenol, and the flow time (T1) at 25 ° C was measured using an Oswald viscometer. Next, the down time (T2) when only o-chlorophenol was measured was measured. The ratio of T1 to T2, that is, T1/T2 is set to the relative viscosity of sulfuric acid.

(3) K value

Polyvinylpyrrolidone was made into an aqueous solution having a concentration of 1%, and the relative viscosity was measured and determined by the Fikentscher formula.

logZ=C[75k ² /(1+1.5kC)+k]

Wherein Z: relative viscosity of the aqueous solution of concentration C; k: K value × 10 ^-3 ; C: aqueous solution concentration (%).

(4) Fineness

The fiber sample was attached to the reel at 1.125 m/turn, and the ring skein was made by rotating 200, and dried by a hot air dryer (105 ± 2 ° C × 60 minutes), and the mass of the skein was weighed by the balance. The fineness is calculated from the value after the official moisture regain. In addition, the nominal moisture regain of the core-sheath composite yarn was set to 4.5%.

(5) Strength and elongation

The fiber sample was measured by "TENSILON" (registered trademark) and UCT-100 manufactured by ORIENTEC Co., Ltd. in accordance with the constant elongation conditions shown in JIS L1013 (Chemical Fiber Yarn Test Method, 2010). The elongation is obtained from the extension of the tensile strength-extension curve showing the greatest strength point. Further, the strength is the intensity obtained by dividing the maximum strength by the fineness. The measurement system was carried out 10 times, and the average value was set as the strength and the elongation.

(6) Section shape

Dissolving an embedding agent composed of paraffin, stearic acid, and ethyl cellulose, after being introduced into the core-sheath composite yarn, and then being solidified by standing at room temperature, aiming at the cross-section of the original filament in the embedding agent In the direction of the cut, the cross section of the fiber is taken by a CCD camera (CS5270) manufactured by Tokyo Electronics Co., Ltd., and 10 cores (all of which have a number of filaments of 10 or less) are selected from the monofilament. The Mitsubishi Electric Mechanism Color Image Processor (SCT-CP710) calculates the flatness of all the monofilaments according to the following method, and calculates the flatness for all the monofilaments, and then sets the average value to the flatness of the filaments.

Flatness = circumscribed circle diameter (R) / inscribed circle diameter (r).

(7) α crystal alignment parameters

The fiber sample was measured by laser Raman spectroscopy, and the intensity ratio ((I1120) parallel) of the Raman band derived from nylon in the vicinity of 1120 cm ^-1 in parallel polarized light was obtained. The ratio of the intensity ratio under vertical polarized light ((I1120) perpendicular) is set as the parameter for the evaluation of the alignment. Further, the intensity of the scattering of each polarization condition (parallel/vertical) is formatted based on the intensity of the Raman band of the CH deformation band (near 1440 cm ^-1 ) which is relatively non-isotropic with respect to the alignment. .

Alpha crystal alignment parameter = (I1120/I1440) parallel / (I1120 / I1440) vertical.

Further, the sample for alignment measurement was subjected to resin-embedding (bisphenol-based epoxy resin, cured for 24 hours), and sliced by a microtome. The slice thickness was set to 2.0 μm. The sliced sample was cut so as to have an elliptical cross section, and the fiber axis was slightly inclined and cut, and the thickness of the elliptical short axis was selected to be a certain thickness. The measurement was carried out in a microscopic mode, and the laser spot diameter of the sample position was 1 μm. The alignment of the core and the sheath at the center was performed, and the alignment was measured under polarized light conditions. The case where the polarization direction coincides with the fiber axis was set as a parallel condition, and the case of orthogonality was set as a vertical condition, and the degree of alignment was evaluated from the Raman band intensity ratio obtained separately. In addition, the measurement of n=3 was performed for each measurement point. The detailed conditions are shown below:

Laser Raman spectroscopy

Device: T-64000 (Joobin Yvon/Aiyu Property)

Condition: measurement mode; microscopic Raman

Objective lens: ×100

Beam diameter: 1μm

Light source: Ar+ laser / 514.5nm

Laser power: 50mW

Diffraction grating: Single 600gr/mm

Slit: 100μm

Detector: CCD/Jobin Yvon 1024×256.

(8) Amine base group amount of sheath polymer fragments

1 g of the sample was dissolved in 50 mL of a phenol/ethanol mixed solution (phenol/ethanol = 80/20) by shaking at 30 ° C to prepare a solution, and the solution was neutralized and titrated with 0.02 N hydrochloric acid to obtain a desired 0.02 N. The amount of hydrochloric acid. Also, using 0.02N hydrochloric acid for neutralization titration only the above A phenol/ethanol mixed solvent (same amount as above) was used to obtain a desired amount of 0.02 N hydrochloric acid. Then, the amount of the amine terminal group per 1 g of the sample was determined from the difference.

(9) Amine-based terminal group amount of sheath polymer of core-sheath composite wire

A. Determination of the weight ratio of the sheath

Dissolving an embedding agent composed of paraffin, stearic acid, and ethyl cellulose, and then introducing the core-sheath composite yarn, and then curing it at room temperature, and cutting the raw yarn in the embedding agent in a cross-sectional direction. The fiber cross section was taken by a Tokyo Electron (CCD) CCD camera (CS5270), and 10 cores (all of which have a number of filaments of 10 or less) were selected for the monofilament, and the Mitsubishi electromechanical color image was used. The cross-sectional photograph of the processor (SCT-CP710) printed at 1500 times is cut into a sheath portion and a core portion, and after the weight is measured, it is calculated according to the following formula.

Sheath weight ratio = (sheath weight / (sheath weight + core weight)) × 100

B. Amine group end group amount of core sheath composite yarn

The amount of the amine terminal group was determined according to the method described in the above (8).

C. Amine base group amount of sheath polymer

The amount of the amine terminal group obtained in the above B was multiplied by the weight ratio of the sheath obtained in the above A to be calculated.

The amine group terminal group concentration of the sheath polymer = the amount of the amine group terminal group of the core sheath composite yarn × the weight ratio of the sheath portion / 100.

(10) Production of tubular knitted fabric

A. Production of tubular knitted fabric

The tubular knitting machine is adjusted and manufactured in such a manner that the needle is 50. When the fineness based on the correct weight of the fiber is low, the total fiber fineness of the yarn to the tubular knitting machine is 50 to 100 dtex, and when the total fineness exceeds 100 dtex, the pair is The tubular knitting machine performs one yarn feeding, and is adjusted and manufactured so that the needles are 50 in the same manner as described above.

B. Refining of tubular knitted fabric

The tubular knitted fabric obtained in the above A was prepared by dissolving 100 ml of a 2 g/l aqueous solution of a nonionic surfactant (manufactured by Daiichi Seiki Co., Ltd., NOGGEN SS) in 1 g of the knitted fabric, and washing at 60 ° C for 30 minutes. The water was washed with running water for 20 minutes, and then dehydrated and air-dried by a dehydrator.

C. Dyeing of tubular knitted fabrics

The tubular knitted fabric obtained in the above A and B was dyed using the following dyes and dyeing assistants.

Acid dye: Erionyl Blue A-R 2.0% by mass

Dyeing aid: 1.5% acetic acid

In a dyeing bath containing an acid dye or a dyeing assistant, it is dyed at a normal pressure of 98 ° C for 45 minutes, and then washed with running water for 20 minutes, and then dehydrated and air-dried by a dehydrator.

(11) Color development

The color development of the tubular knitted fabric obtained by the tubular knitted fabric (10) C and dyed was evaluated in accordance with the following four stages.

S: The whole color is uniformly colored to a dark color.

A: The whole color is evenly colored to the middle color (light ~ dark) ~ dark

B: All colors are evenly colored to light color ~ intermediate color (light ~ dark)

C: uniformly colored to a light color

(12) Suction and desorption (△MR)

The tubular knitted fabric (10) A was weighed in a weighing bottle: about 1 to 2 g, kept dry at 110 ° C for 2 hours, and the weight (W0) was measured, and then the target substance was kept at 20 ° C and a relative humidity of 65%. The weight (W65) was measured after 24 hours. Then, it was kept at 30 ° C and a relative humidity of 90% for 24 hours, and then the weight (W90) was measured. Also, calculate according to the following formula.

MR1=[(W65-W0)/W0]×100%‧‧‧‧‧‧‧‧‧(1)

MR2=[(W90-W0)/W0]×100%‧‧‧‧‧‧‧‧‧(2)

△ MR = MR2-MR1‧‧‧‧‧‧‧‧‧‧‧‧‧ (3)

(13) △MR after washing

The tubular knitted fabric (10) A was repeatedly subjected to 20 washings in accordance with the method described in No. 103 of the First Schedule of JIS L0217 (1995), and the moisture absorption and desorption described above was measured and calculated.

When the ΔMR is 5.0% or more, it is evaluated that good comfort can be obtained when worn.

(14) △MR retention rate after washing

The ΔMR change index before and after washing was calculated by the following formula to calculate the ΔMR retention rate after washing.

ΔMR after washing treatment △ MR × 100 before washing treatment

When the ΔMR retention ratio was 90% or more, it was evaluated as having washing resistance.

(15) Wash fastness

The dyed tubular knitted fabric (10) C was measured in accordance with the A-2 condition in Table 7 in accordance with JIS L0844 (2011) Clause A. The judgment is based on the visual method of 10 (a) of JIS L0801 (2011), and the level determination is performed for the discoloration and the discoloration. When the discoloration and the color drop were judged to be Grade 3 or higher, the dye fastness was evaluated as acceptable; at least one of the discoloration or the color drop determination was 2-3 or less, and the dye fastness was evaluated as unacceptable.

(16) Comprehensive evaluation

The evaluation of the washing fastness, ΔMR after washing, and ΔMR retention after washing were carried out, and evaluation was carried out in the following three stages.

S: Washing fastness, discoloration, and contamination were all determined to be 4 or more, ΔMR after washing was 7.0% or more, and ΔMR retention after washing was 95% or more.

A: Washing fastness, discoloration, and contamination were all determined to be 3 or more, ΔMR was 5.0% after washing, and ΔMR retention after washing was 90% or more.

C: The fastness of washing and the determination of the degree of contamination were all below 2-3, the ΔMR was less than 5.0% after washing, and the ΔMR retention rate after washing was less than 90%.

The S and A grades are superior to the comfort of natural fibers and the washability which can withstand practical use.

(17) Contact cold sensitivity (q-max)

The contact cold sensitivity system was evaluated by using the THERMOLAB IIB type rapid rapid thermal property measuring device KES-F7 (manufactured by KATO TECH Co., Ltd.) to evaluate the cold temperature sensation (q-max) obtained by measuring the cold temperature. The q-max value is a heat accumulated in a pure copper plate, and after it is in contact with the surface of the sample, the peak value of heat flow (unit: W/cm ² ) of the object to which the accumulated heat is transferred to the low temperature side sample is measured.

The tubular knitted fabric (10) A and the apparatus (KES-F7 THERMO LABO IIB TYPE (manufactured by KATO TECH)) were placed in a room adjusted to a room temperature of 20 ° C and a relative humidity of 60% for a day and night. In order to make the T-BOX (temperature detecting and heat storage plate) which is in contact with the tubular knitting and measure the amount of heat transfer higher than room temperature by 10 ° C, the temperature-receiving hot plate BT plate is set to 30 ° C, and the BT plate is heated. The hot plate G-BT around the heat retention BT was set to 20.3 ° C and stabilized. The tubular back of the back of the fabric (being the skin side when worn) was placed, and the T-BOX was placed on the tubular knitting as early as possible, and q-max was measured. In addition, the surface density (g/cm ² ) of the tubular knitting was calculated by cutting the tubular knitted fabric of the measuring portion into a square of 10 cm and measuring the weight.

In the present measurement method, when q-max was 0.175 (W/cm ² ) or more, it was judged that good comfort was obtained when worn.

(18) Contact cold sensitivity (q-max) retention rate after washing

The tubular knitted fabric (10) A was repeatedly subjected to 20 washings in accordance with the method described in No. 103 of the First Schedule of JIS L0217 (1995), and the contact cold sensitivity described above was measured. The contact cold sensitivity change index before and after washing was calculated according to the following formula to calculate the q-max retention rate after washing.

(q-max after washing) / (q-max before washing treatment) × 100

When the retention rate of q-max was 90% or more, the washing resistance was evaluated.

(19) Antistatic properties

The tubular knitted fabric (10) A was measured in accordance with JIS L1094 (Testing method of chargeability of knitted fabrics and knitted fabrics, 2014) A method (half-life measuring method) and B method (friction band voltage measuring method). Further, the environmental conditions were 20 ° C × 40% RH, and the friction cloth was cotton (fine cotton cloth No. 3), and it was measured in the longitudinal direction.

When the friction withstand voltage is 1500 V or less, it is rated that good antistatic performance can be obtained when worn.

(20) Antistatic property after washing

The tubular knitted fabric (10) A was subjected to repeated washing for 20 times in accordance with the method described in No. 103 of the First Schedule of JIS L0217 (1995), and the above-described antistatic property was measured.

[Example 1]

The polydecylamine component is a polyamide 6 and a polyether component (poly(alkylene oxide) glycol)-based polyethylene glycol having a molecular weight of 1,500, and the composition ratio of the polyether component is about 76% by weight of the polyether ester oxime. The amine copolymer (manufactured by ARKEMA, MH1657, o-chlorophenol relative viscosity: 1.69) was used as the core, and the nylon 6 having a relative viscosity of sulfuric acid of 2.71 and an amine terminal group of 5.95×10 ^-5 mol/g was set. The sheath was melted at 270 ° C, and spun from the concentric core-sheath composite nozzle (24 holes) so that the core/sheath ratio (parts by weight) = 50/50. Further, the amount of the amine terminal group is adjusted by hexamethylenediamine and acetic acid at the time of polymerization.

At this time, the total fineness of the obtained core-sheath composite yarn was 56 dtex, and the number of rotations of the gear pump was selected, and the discharge amount of 22 g/min was set. then, The yarn is cooled and solidified by the yarn cooling device, and the non-aqueous oil agent is supplied by the oil supply device, and then the first fluid entanglement nozzle device is used to impart the entanglement, and the peripheral speed of the traction roller belonging to the first roller is 3368 m/min. The extension speed of the second roll was extended at a peripheral speed of 4,210 m/min, and heat setting was performed at 150 ° C using a stretching roll, and coiling was performed at a take-up speed of 4000 m/min to obtain a core-sheath composite yarn of 56 dtex 24 monofilament. The physical properties of the obtained fiber are shown in Table 1.

The core-sheath composite yarn obtained had an extremely high moisture absorption property of ΔMR of 12.4%. Further, it was found that the washing fastness was degraded and the color loss was judged to be 4 grades, the ΔMR system was 12.4% after washing, and the ΔMR retention rate after washing was 100%. That is, it is possible to obtain a comfortable clothing which is excellent in washing resistance which can withstand practical use by using a fabric and a clothing material which have obtained a core-sheath composite yarn.

Further, q-max was 0.170 W/cm ² , q-max was 0.170 W/cm ² after washing, and the q-max retention after washing was 100%, and the contact cold feeling was also excellent.

Furthermore, it has an excellent antistatic property of a friction band voltage of 800 V in an environment of 20 ° C × 40% RH and a friction band voltage of 800 V after washing, and it is possible to obtain a washing durability which can withstand practical use and excellent antistatic property. Comfortable clothing.

[Embodiment 2]

Except that the peripheral speed of the traction roller belonging to the first roller was 2381 m/min, the peripheral speed of the stretching roller belonging to the second roller was 3571 m/min, and the winding speed was 3500 m/min, the others were in accordance with Example 1. The same method obtained a core-sheath composite wire of 56 dtex 24 monofilament. The physical properties of the obtained fiber are shown in Table 1.

The obtained core-sheath composite yarn system has an extremely high moisture absorption property of ΔMR of 11.6%. In addition, the washing fastness and discoloration and the color drop determination are all 3-4 grades, after washing The ΔMR system was 11.1%, and the ΔMR retention rate after washing was 95.7%.

[Example 3]

Except that the peripheral speed of the traction roller belonging to the first roller was 2245 m/min, the peripheral speed of the stretching roller belonging to the second roller was 3367 m/min, and the winding speed was 3300 m/min, the others were in accordance with Example 1. The same method obtained a core-sheath composite wire of 56 dtex 24 monofilament. The physical properties of the obtained fiber are shown in Table 1.

The core-sheath composite yarn obtained has an extremely high moisture absorption property of ΔMR of 10.8%. Further, the washing fastness was judged to be 3 levels, the ΔMR system was 9.9% after washing, and the ΔMR retention rate after washing was 91.7%.

[Example 4]

Except that the peripheral speed of the traction roller belonging to the first roller was 4474 m/min, the peripheral speed of the stretching roller belonging to the second roller was 4474 m/min, and the winding speed was 4250 m/min, the others were in accordance with Example 1. The same method obtained a core-sheath composite wire of 56 dtex 24 monofilament. The physical properties of the obtained fiber are shown in Table 1.

The core-sheath composite yarn obtained had an extremely high moisture absorption property of ΔMR of 13.1%. Further, it was found that the washing fastness was degraded and the color loss was judged to be 4-5, the ΔMR system was 13.1% after washing, and the ΔMR retention after washing was 100%.

[Example 5]

A core-sheath composite yarn of 56 dtex 24 monofilament was obtained in the same manner as in Example 1 except that spinning was carried out in such a manner that the core/sheath ratio (parts by weight) = 30/70. The physical properties of the obtained fiber are shown in Table 1.

The core-sheath composite yarn obtained had a high moisture absorption property of ΔMR of 7.5%. Further, the washing fastness was judged to be 3-4 grades, the ΔMR system was 7.2% after washing, and the ΔMR retention rate after washing was 96.0%.

Furthermore, the friction band voltage of 850 V in an environment of 20 ° C × 40% RH and the excellent antistatic property of the friction band voltage of 850 V after washing can obtain washing durability with practical use and excellent antistatic performance. Comfortable clothing.

[Embodiment 6]

A core-sheath composite yarn of 56 dtex 24 monofilament was obtained in the same manner as in Example 1 except that spinning was carried out in such a manner that the core/sheath ratio (parts by weight) = 20/80. The physical properties of the obtained fiber are shown in Table 2.

The core-sheath composite yarn obtained had a sufficient moisture absorption property of ΔMR of 5.9%. Further, the washing fastness was judged to be 3-4 grades, the ΔMR system was 5.5% after washing, and the ΔMR retention rate after washing was 93.2%.

[Embodiment 7]

A core-sheath composite yarn of 56 dtex 24 monofilament was obtained in the same manner as in Example 1 except that spinning was carried out in such a manner that the core/sheath ratio (parts by weight) = 70/30. The physical properties of the obtained fiber are shown in Table 2.

The core-sheath composite yarn obtained had an extremely high moisture absorption property of ΔMR of 15.1%. Further, the washing fastness was judged to be 3-4 grades, the ΔMR system was 15.0% after washing, and the ΔMR retention rate after washing was 99.3%.

[Embodiment 8]

A core-sheath composite yarn of 56 dtex 24 monofilament was obtained in the same manner as in Example 1 except that spinning was carried out in such a manner that the core/sheath ratio (parts by weight) = 80/20.

The physical properties of the obtained fiber are shown in Table 2.

The core-sheath composite yarn obtained has an extremely high hygroscopic property of ΔMR of 16.9%. Further, the washing fastness was judged to be 3 levels, the ΔMR system was 16.7% after washing, and the ΔMR retention rate after washing was 99.4%.

[Embodiment 9]

56 dtex 24 monofilament was obtained in the same manner as in Example 1 except that nylon 6 having a relative viscosity of sulfuric acid of 2.40 and an amine terminal group of 3.95 × 10 ^-5 mol/g was used as the sheath. Core sheath composite wire. The physical properties of the obtained fiber are shown in Table 2.

The core-sheath composite yarn obtained had an extremely high moisture absorption property of ΔMR of 11.1%. Further, the washing fastness was judged to be 3 levels, the ΔMR system was 10.1% after washing, and the ΔMR retention rate after washing was 90.1%.

[Embodiment 10]

A 56 dtex 24 monofilament was obtained in the same manner as in Example 1 except that the nylon 6 having a relative viscosity of 2.63 and an amine terminal group of 5.20 × 10 ^-5 mol/g was used as the sheath. Core sheath composite wire. The physical properties of the obtained fiber are shown in Table 2.

The core-sheath composite yarn obtained had an extremely high hygroscopic property of ΔMR of 12.0%. Further, it was found that the washing fastness was degraded and the color loss was judged to be 4 grades, the ΔMR system after washing was 11.6%, and the ΔMR retention rate after washing was 96.7%.

[Example 11]

A 56 dtex 24 monofilament was obtained in the same manner as in Example 1 except that the nylon 6 having a relative viscosity of 3.30 and an amine terminal group of 4.78 × 10 ^-5 mol/g was used as the sheath. Core sheath composite wire. The physical properties of the obtained fiber are shown in Table 3.

The core-sheath composite yarn obtained had an extremely high moisture absorption property of ΔMR of 13.1%. Further, it was found that the washing fastness was degraded and the color loss was judged to be 4-5, the ΔMR system was 13.1% after washing, and the ΔMR retention after washing was 100%.

[Embodiment 12]

A 56 dtex 24 monofilament was obtained in the same manner as in Example 1 except that the nylon 6 having a relative viscosity of 2.63 and an amine terminal group of 7.40 × 10 ^-5 mol/g was used as the sheath. Core sheath composite wire. The physical properties of the obtained fiber are shown in Table 3.

The core-sheath composite yarn obtained has an extremely high moisture absorption property of ΔMR of 12.7%. Further, it was found that the washing fastness was degraded and the color loss was judged to be 4-5, the ΔMR system was 12.2% after washing, and the ΔMR retention after washing was 96.1%.

[Example 13]

A 56 dtex 24 monofilament was obtained in the same manner as in Example 1 except that the nylon 6 having a relative viscosity of 2.63 and an amine terminal group of 4.15 × 10 ^-5 mol/g was used as the sheath. Core sheath composite wire. The physical properties of the obtained fiber are shown in Table 3.

The obtained core-sheath composite yarn system has an extremely high moisture absorption property of ΔMR of 11.5%. Further, the washing fastness was judged to be 3 levels, the ΔMR system was 10.5% after washing, and the ΔMR retention rate after washing was 91.3%.

[Embodiment 14]

The 56 dtex 68 monofilament was obtained in the same manner as in Example 1 except that the concentric core-sheath composite nozzle was set to 68 holes, and the peripheral speed of the traction rolls belonging to the first roll was set to 3508 m/min. Core sheath composite wire. The physical properties of the obtained fiber are shown in Table 3.

The obtained core-sheath composite yarn system has an extremely high moisture absorption property of ΔMR of 13.6%. Further, the washing fastness was judged to be 4 levels, the ΔMR system was 13.6% after washing, and the ΔMR retention rate after washing was 100%.

[Example 15]

The 56 dtex 68 monofilament was obtained in the same manner as in Example 5 except that the concentric core-sheath composite nozzle was set to 68 holes, and the peripheral speed of the traction rolls belonging to the first roll was set to 3508 m/min. Core sheath composite wire. The physical properties of the obtained fiber are shown in Table 3.

The obtained core-sheath composite yarn system has an extremely high hygroscopic property of ΔMR of 8.3%. Further, the washing fastness was judged to be 3-4 grades, the ΔMR system was 7.9% after washing, and the ΔMR retention rate after washing was 95.2%.

[Example 16]

Nylon 6 containing no added substance and having a relative viscosity of 2.71, and nylon 6 added with polyvinylpyrrolidone ("Luviskol®" K30SP manufactured by BASF Corporation, K value = 30) 20% by weight and having a relative viscosity of 2.71 a nylon 6 blended polymer in which the ratio of the ratio of 5 and the polyvinylpyrrolidone addition ratio was 3.3% by weight, which was subjected to the chip blending, and the sheath was subjected to spinning, and the rest were the same as in Example 1. The method obtained a 56 dtex 24 monofilament core-sheath composite wire. The physical properties of the obtained fiber are shown in Table 4.

The obtained core-sheath composite yarn system has an extremely high moisture absorption property of ΔMR of 13.3%. Further, it was found that the washing fastness was degraded and the color deterioration was judged to be 4 grades, the ΔMR system after washing was 13.3%, and the ΔMR retention rate after washing was 100%. That is, it is possible to obtain a comfortable clothing which is excellent in washing resistance which can withstand practical use by using a fabric and a clothing material which have obtained a core-sheath composite yarn. Further, since the sheath contains polyvinylpyrrolidone as a moisture absorbent, not only the moisture absorption performance can be improved, but also moisture can be transferred from the skin to the side of the fiber sheath when worn, and the feeling of slipperiness of the first embodiment can be obtained. .

[Example 17]

Nylon 6 containing no added substance and having a relative viscosity of 2.71, and nylon 6 added with polyvinylpyrrolidone ("Luviskol®" K30SP manufactured by BASF Corporation, K value = 30) 20% by weight and having a relative viscosity of 2.71 A core-sheath composite yarn of 56 dtex 24 monofilament was obtained in the same manner as in Example 1 except that the ratio of 2 was changed to 6.7 wt% of the polyvinylpyrrolidone. The physical properties of the obtained fiber are shown in Table 4.

The obtained core-sheath composite yarn system has an extremely high moisture absorption property of ΔMR of 13.6%. Further, it was found that the washing fastness was degraded and the color loss was judged to be 4 grades, the ΔMR system after washing was 13.6%, and the ΔMR retention rate after washing was 100%.

[Comparative Example 1]

56 dtex 24 was obtained in the same manner as in Example 1 except that the sulfuric acid relative viscosity system was 2.15, and the nylon 6 having an amine terminal group amount of 4.70 × 10 ^-5 mol/g was used as the sheath component and spinning was carried out. Monofilament core sheath composite wire. The physical properties of the obtained fiber are shown in Table 5.

Furthermore, although the core-sheath composite yarn obtained has an extremely high hygroscopic property of ΔMR of 10.5%, the ΔMR retention rate after washing is 73.3%, and the washing resistance is not able to withstand the hygroscopic property of actual use. . In addition, the washing fastness is degraded and the color drop is judged to be 2-3 grades, and the dyeing fastness is poor. That is, it was found that the fabric and the clothing material obtained by obtaining the core-sheath composite yarn were not able to withstand the washing resistance (hygroscopic property, dyeability) which was actually used. Further, although the friction band voltage in the environment of 20 ° C × 40% RH was 1000 V, the friction band voltage after washing was 1700 V, and the antistatic property was poor. That is, it has been found that the use of the fabric and the clothing material obtained with the core-sheath composite yarn is likely to cause entanglement or dust adhesion when worn in a low-temperature and low-humidity environment, and the comfort is poor.

[Comparative Example 2]

A core-sheath composite yarn of 56 dtex 24 monofilament was obtained in the same manner as in Example 1 except that the core/sheath ratio (parts by weight) = 10/90 was spun. The physical properties of the obtained fiber are shown in Table 5.

Furthermore, the obtained washing fastness of the core-sheath composite yarn was determined to be 3-4 grades, and the dyeing fastness was good. Further, the ΔMR system was 4.2%, and did not have sufficient moisture absorption performance. Further, the ΔMR retention rate after washing was 84.4%, and the washing resistance was not able to withstand the moisture absorption performance actually used. That is, it was found that the use of the fabric and the clothing which obtained the core-sheath composite yarn did not provide the comfort beyond the natural fiber.

[Comparative Example 3]

A core-sheath composite yarn of 56 dtex 24 monofilament was obtained in the same manner as in Example 1 except that the core/sheath ratio (parts by weight) was 90/10. The physical properties of the obtained fiber are shown in Table 5.

Further, the core-sheath composite yarn obtained had an extremely high hygroscopic property of ΔMR of 17.8, and the ΔMR retention rate after washing was 92.7%, and had washing durability which was able to withstand the moisture absorption performance actually used. However, the washing fastness is determined to be 2-3 grades, and the dyeing fastness is poor. That is, it was found that the fabric and the clothing material obtained by obtaining the core-sheath composite yarn did not have the washing resistance (dyeability) which can withstand practical use.

Furthermore, in the process of taking the raw yarn, the broken yarn often occurs, and it is difficult to perform stable spinning. Further, when the fiber package taken up is observed, a large amount of defective products in which hair fluffing occurs are generated, and productivity is poor.

[Comparative Example 4]

Except for the circumferential speed of the traction roller belonging to the first roller being 2020 m/min, the peripheral speed of the stretching roller belonging to the second roller being 3030 m/min, and the winding speed being 3000 m/min, the others were in accordance with Example 1 The same method obtained a core-sheath composite wire of 56 dtex 24 monofilament. The physical properties of the obtained fiber are shown in Table 5.

Further, although the obtained core-sheath composite yarn had an extremely high hygroscopic property of ΔMR of 10.0%, the ΔMR retention rate after washing was 88.0%, and it did not have the washing resistance which can withstand the moisture absorption performance actually used. In addition, the washing fastness and discoloration and the color drop determination were both grade 2, and the dyeing fastness was poor. That is, it was found that the fabric and the clothing material obtained by obtaining the core-sheath composite yarn were not able to withstand the washing resistance (hygroscopic property, dyeability) which was actually used.

[Embodiment 18]

The polydecylamine component is a nylon 6, a polyether component (poly(alkylene oxide) glycol) is a polyethylene glycol having a molecular weight of 1,500, and a polyether ester of a polyether component is formed in a ratio of about 76% by mol. The amine copolymer (manufactured by ARKEMA, MH1657, o-chlorophenol relative viscosity: 1.69) was used as the core, and the nylon 6 having a relative viscosity of sulfuric acid of 2.71 and an amine terminal group of 5.95×10 ^-5 mol/g was set. The sheath portion was melted at 270 ° C, and the core-sheath composite spinneret having a dumbbell-shaped discharge hole was spun so that the core/sheath ratio (parts by weight) = 50/50.

At this time, the number of rotations of the gear pump was selected so that the total fineness of the core-sheath composite yarn was 56 dtex, and the discharge amount was set to 22 g/min. Then, the yarn is cooled and solidified by the yarn cooling device, and after the non-aqueous oil agent is supplied by the oil supply device, the first fluid entanglement nozzle device is used to impart the entanglement, and the peripheral speed of the traction roller belonging to the first roller is 3368 m/ Min, the extension speed of the extension roller belonging to the second roller is 4210 m/min, and the heat is set by the extension roller at 150 ° C, and the winding speed is performed at a winding speed of 4000 m/min to obtain a flatness of 4.0, 56 dtex 24 monofilament. Core-sheath composite wire of I-section. The physical properties of the obtained fiber are shown in Table 6.

The core-sheath composite yarn obtained had an extremely high moisture absorption property of ΔMR of 12.4%. Further, it was found that the washing fastness was degraded and the color loss was judged to be 4 grades, the ΔMR system was 12.4% after washing, and the ΔMR retention rate after washing was 100%. Further, the q-max system was 0.183 W/cm ² , the q-max after washing was 0.183 W/cm ² , and the q-max retention after washing was 100%. In other words, a fabric having a core-sheath composite yarn and a clothing article can be used, and a comfortable fabric excellent in moisture absorption performance and contact cold feeling and excellent in washing resistance which can withstand practical use can be obtained.

[Embodiment 19]

Except for melting at 275 ° C and spinning, and the peripheral speed of the pulling roller belonging to the first roller is 2381 m/min, the peripheral speed of the stretching roller belonging to the second roller is 3571 m/min, and the winding speed is 3500 m/min. In the same manner as in Example 18, a core-sheath composite yarn having a flatness of 2.5 and a 56 dtex 24 monofilament having an I-shaped cross section was obtained. The physical properties of the obtained fiber are shown in Table 6.

The obtained core-sheath composite filament system has an extremely high hygroscopic property of ΔMR of 11.9%. Further, the washing fastness was judged to be 3 levels, the ΔMR system was 11.5% after washing, and the ΔMR retention rate after washing was 97%. Further, the q-max system was 0.178 W/cm ² , the q-max after washing was 0.178 W/cm ² , and the q-max retention after washing was 100%.

[Example 20]

A core-sheath composite yarn having an I-shaped cross section of a flatness of 4.8 and a 56 dtex 24 monofilament was obtained in the same manner as in Example 18 except that melting was carried out at 265 ° C and spinning was carried out. The physical properties of the obtained fiber are shown in Table 6.

The core-sheath composite yarn obtained has an extremely high moisture absorption property of ΔMR of 12.8%. Further, it was found that the washing fastness was degraded and the color loss was judged to be 4 grades, the ΔMR system after washing was 12.8%, and the ΔMR retention rate after washing was 100%. Further, the q-max system was 0.186 W/cm ² , the q-max after washing was 0.186 W/cm ² , and the q-max retention after washing was 100%.

[Example 21]

The same procedure as in Example 18 was carried out except that the core-sheath composite spinneret having a convex lens-shaped discharge hole was used for spinning in such a manner that the core/sheath ratio (parts by weight) was 30/70. Core-sheath composite wire with a convex lens type of 4.0, 56 dtex 24 monofilament. The physical properties of the obtained fiber are shown in Table 6.

The obtained core-sheath composite yarn system has an extremely high hygroscopic property of ΔMR of 7.5%. Further, the washing fastness and the discoloration and the color drop determination were all in a state of 4-5, the ΔMR system was 7.2% after washing, and the ΔMR retention rate after washing was 96%. Further, the q-max was 0.177 W/cm ² , the q-max after washing was 0.177 W/cm ² , and the q-max retention after washing was 100%.

[Example 22]

A core having an I-shaped cross-section of 4.0, 56 dtex 24 monofilament was obtained in the same manner as in Example 18 except that the core/sheath ratio (parts by weight) was 20/80. Sheath composite wire. The physical properties of the obtained fiber are shown in Table 6.

The obtained core-sheath composite yarn system has an extremely high moisture absorption property of ΔMR of 5.9%. Further, the washing fastness was judged to be in a state of 4-5 grades, the ΔMR system was 5.5% after washing, and the ΔMR retention rate after washing was 93%. Further, the q-max was 0.175 W/cm ² , the q-max after washing was 0.175 W/cm ² , and the q-max retention after washing was 100%.

[Example 23]

The same procedure as in Example 18 was carried out, except that the core-sheath composite spinneret having a convex lens-shaped discharge hole was used, and spinning was performed so that the core/sheath ratio (parts by weight) = 70/30. Obtaining a convex lens type with a flatness of 4.0 and 56 dtex 24 monofilament Core sheath composite wire. The physical properties of the obtained fiber are shown in Table 7.

The core-sheath composite yarn obtained had an extremely high hygroscopic property of ΔMR of 15.2%. Further, the washing fastness was judged to be 3-4 grades, the ΔMR system was 15.0% after washing, and the ΔMR retention rate after washing was 99%. Further, the q-max was 0.186 W/cm ² , the q-max after washing was 0.185 W/cm ² , and the q-max retention after washing was 99%.

[Example 24]

A core having an I-section of flatness of 4.0, 56 dtex 24 monofilament was obtained in the same manner as in Example 18 except that the core/sheath ratio (parts by weight) was 80/20. Sheath composite wire. The physical properties of the obtained fiber are shown in Table 7.

The core-sheath composite yarn obtained had an extremely high moisture absorption property of ΔMR of 17.0%. Further, the washing fastness was judged to be 3 levels, the ΔMR system was 16.9% after washing, and the ΔMR retention rate after washing was 99%. Further, the q-max was 0.188 W/cm ² , the q-max after washing was 0.186 W/cm ² , and the q-max retention after washing was 99%.

[Example 25]

The flatness was obtained in the same manner as in Example 18 except that the nylon 6 having a relative viscosity of sulfuric acid of 2.40 and an amine terminal group of 3.95 × 10 ^-5 mol/g was used as the sheath portion and spun. 2.0, 56dtex 24 monofilament core-sheath composite wire with I-section. The physical properties of the obtained fiber are shown in Table 7.

The core-sheath composite yarn obtained had an extremely high moisture absorption property of ΔMR of 11.1%. Further, the washing fastness was judged to be 3 levels, the ΔMR system was 10.2% after washing, and the ΔMR retention rate after washing was 92%. Further, the q-max was 0.178 W/cm ² , the q-max after washing was 0.166 W/cm ² , and the q-max retention after washing was 93%.

[Example 26]

The flatness was obtained in the same manner as in Example 18 except that the nylon 6 having a relative viscosity of sulfuric acid of 2.63 and an amine terminal group of 7.40 × 10 ^-5 mol/g was used as the sheath portion and spun. 3.0, 56dtex 24 monofilament core-sheath composite wire with I-section. The physical properties of the obtained fiber are shown in Table 7.

The core-sheath composite yarn obtained had an extremely high hygroscopic property of ΔMR of 12.1%. Further, the washing fastness was judged to be 3-4 grades, the ΔMR system was 11.5% after washing, and the ΔMR retention rate after washing was 95%.

Further, the q-max was 0.180 W/cm ² , the q-max after washing was 0.171 W/cm ² , and the q-max retention after washing was 95%.

[Example 27]

Nylon 6 having a relative viscosity of sulfuric acid of 3.30 and an amine terminal group of 4.78×10 ^-5 mol/g was used as a sheath and spun, and a core-sheath composite spinner having a convex lens-shaped discharge hole was used. Further, in the same manner as in Example 18, a core-sheath composite yarn having a convex lens type cross section of a flatness of 4.5 and a 56 dtex 24 monofilament was obtained. The physical properties of the obtained fiber are shown in Table 7.

The core-sheath composite yarn obtained had an extremely high moisture absorption property of ΔMR of 13.0%. Further, it was found that the washing fastness was degraded and the color loss was judged to be in the range of 4-5, the ΔMR system after washing was 13.0%, and the ΔMR retention after washing was 100%. Further, the q-max system was 0.183 W/cm ² , the q-max after washing was 0.183 W/cm ² , and the q-max retention after washing was 100%.

[Comparative Example 5]

The flatness was obtained in the same manner as in Example 18 except that the nylon 6 having a relative viscosity of sulfuric acid of 2.15 and an amine terminal group of 4.70 × 10 ^-5 mol/g was used as the sheath component and spun. Degree 1.3, 56dtex 24 monofilament core-sheath composite wire with I-section. The physical properties of the obtained fiber are shown in Table 8.

The core-sheath composite yarn obtained had an extremely high hygroscopic property of ΔMR of 10.6%, but the ΔMR retention rate after washing was 76%, and did not have the washing resistance which can withstand the moisture absorption performance actually used. In addition, the washing fastness is degraded and the color drop is judged to be 2-3 grades, and the dyeing fastness is poor.

Furthermore, q-max is 0.165 W/cm ² , q-max is 0.139 W/cm ² after washing, and the q-max retention rate after washing is 84%, which does not have the contact cold feeling performance that can withstand practical use. Washing resistance.

That is, it was found that the fabric and the clothing article obtained by obtaining the core-sheath composite yarn did not have the washing resistance (hygroscopic property, dyeability, and contact cold sensitivity) which can withstand practical use.

[Comparative Example 6]

Nylon 6 having a relative viscosity of sulfuric acid of 3.45 and an amine terminal group of 4.50 × 10 ^-5 mol/g was used as a sheath, and was melted at 280 ° C and spun, and the rest were the same as in Example 18. The method was to obtain a core-sheath composite wire having a flatness of 5.5 and 56 dtex 24 monofilaments having an I-shaped cross section. The physical properties of the obtained fiber are shown in Table 8.

The core-sheath composite yarn obtained had an extremely high hygroscopic property of ΔMR of 13.1%, but the ΔMR retention rate after washing was 80%, and it did not have the washing resistance which can withstand the moisture absorption performance actually used. Moreover, the washing fastness and discoloration and the color drop determination are 3-4 grades and 2-3 grades, and the washing fastness is poor.

Furthermore, q-max is 0.188 W/cm ² , q-max is 0.147 W/cm ² after washing, and the q-max retention after washing is 78%, which does not have the contact cold feeling performance that can withstand practical use. Washing resistance.

[Comparative Example 7]

The same procedure as in Example 18 was carried out except that nylon 6 having a sulfuric acid relative viscosity of 2.71 and an amine terminal group amount of 5.95 × 10 ^-5 mol/g was used as a core portion to prepare a single-component yarn. Flat sheath 4.0, 56 dtex 24 monofilament core-sheath composite wire with I-section. The physical properties of the obtained fiber are shown in Table 8.

The obtained single-component silk system ΔMR was 2.4%, and did not have excellent moisture absorption properties. Further, the washing fastness was judged to be 5 levels, the ΔMR system was 2.4% after washing, and the ΔMR retention rate after washing was 100%.

However, q-max was 0.157 W/cm ² , q-max was 0.157 W/cm ² after washing, and the q-max retention after washing was 100%, and there was no excellent contact cold feeling performance.

[Example 28]

The polyether ester decylamine copolymerization system does not contain titanium oxide, and the polyamine component is nylon 6, the polyether component (poly(alkylene oxide) diol) is a polyethylene glycol having a molecular weight of 1,500, and the composition of the polyether component The polyether ester guanamine copolymer (manufactured by ARKEMA, MH1657, o-chlorophenol relative viscosity: 1.69) having a ratio of about 76% by mol was used for the core.

A nylon 6 fragment having 0.3% by weight of polyamine-based titanium oxide, a relative viscosity of sulfuric acid of 2.63, and an amine terminal group of 5.10×10 ^-5 mol/g was used for the sheath portion. Further, the titanium oxide is added during the polymerization, and the amount of the amine terminal group is adjusted by hexamethylenediamine and acetic acid during the polymerization.

Polyether which has been dried to a moisture content of less than 0.03% by weight The ester amide copolymer (manufactured by ARKEMA Co., Ltd., MH1657) was used as a core portion, and nylon 6 dried to a moisture content of the granules of 0.03 wt% or less was used as a sheath portion, and the core portion was 260 ° C and the sheath portion was 260 ° C. In the spinning spinneret which is a concentric core-sheath type composite fiber, the melt discharge is performed so that the core-sheath ratio (parts by weight) = 50/50. Further, the relevant core-sheath ratio is adjusted by the number of gear pump rotations of the metered molten polymer.

Then, the yarn is cooled and solidified by the yarn cooling device, and after the non-aqueous oil agent is supplied by the oil supply device, the first fluid entanglement nozzle device is used to impart the entanglement, and the peripheral speed of the traction roller belonging to the first roller is 3368 m/ Min, the extension roller belonging to the second roller was extended at a peripheral speed of 4210 m/min, and heat-setting was performed at 150 ° C by a stretching roller, and coiling was performed at a take-up speed of 4000 m/min to obtain a core-sheath composite yarn of 56 dtex 24 monofilament.

The amount of the titanium oxide of the core-sheath composite fiber obtained was 0.15% by weight. The physical properties of the fibers are shown in Table 9.

It was found that the moisture absorption performance and the contact cold feeling were excellent, and the moisture absorption performance and the contact cold feeling were maintained even when the washing was performed, and the dyeing fastness was excellent.

[Example 29]

Nylon 6 fragments having a polyamine-based titanium oxide content of 1.8% by weight, a sulfuric acid relative viscosity of 2.63, and an amine terminal grouping amount of 5.10×10 ^-5 mol/g were used for the sheath portion, and the rest were in accordance with Example 28 The same method obtained a 56 dtex 24 monofilament core-sheath composite fiber.

The amount of the titanium oxide of the core-sheath composite fiber obtained was 0.9% by weight. The physical properties of the fibers are shown in Table 9.

It is known that both the moisture absorption property and the contact cold feeling are excellent, and the sheath α is controlled by applying an appropriate extension to the sheath polyamine and setting the core sheath ratio to an appropriate ratio. The type crystal alignment parameter can obtain a core-sheath composite fiber which maintains hygroscopic property and contact cold feeling even when washing is performed, and is excellent in dye fastness.

[Example 30]

Nylon 6 fragments having a polyamine-based titanium oxide content of 5.0% by weight, a sulfuric acid relative viscosity of 2.40, and an amine terminal group content of 5.90×10 ^-5 mol/g were used for the sheath portion, and the rest were in accordance with Example 28 The same method obtained a 56 dtex 24 monofilament core-sheath composite fiber.

The amount of the titanium oxide of the core-sheath composite fiber obtained was 2.5% by weight. The physical properties of the fibers are shown in Table 9.

It was found that the moisture absorption performance and the contact cold feeling were excellent, and the moisture absorption performance and the contact cold feeling were maintained even when the washing was performed, and the dyeing fastness was excellent.

[Example 31]

Except that the polyamide-based titanium oxide 5.0% by weight, sulfuric acid relative viscosity of 2.40, terminal amino groups in an amount of 5.90 × 10 ^-5 mol / g of nylon-6 chips used for the sheath portion, and set a core-sheath ratio (parts by weight The core-sheath composite fiber of 56 dtex 24 monofilament was obtained in the same manner as in Example 28 except that the ratio was 30/70.

The amount of the titanium oxide of the core-sheath composite fiber obtained was 3.5% by weight. The physical properties of the fibers are shown in Table 9.

It was found that the moisture absorption performance and the contact cold feeling were excellent, and the moisture absorption performance and the contact cold feeling were maintained even when the washing was performed, and the dyeing fastness was excellent.

[Example 32]

Except that the polyamide 6 was not contained in the polyamine, and the niobium sulfate was 1.0% by weight, the sulfuric acid relative viscosity was 2.60, and the amine end group amount was 5.98×10 ^-5 mol/g. A core-sheath composite fiber of 56 dtex 24 monofilament was obtained in the same manner as in Example 28.

The amount of barium sulfate of the core-sheath composite fiber obtained was 0.5% by weight. The physical properties of the fibers are shown in Table 9.

It was found that the moisture absorption performance and the contact cold feeling were excellent, and the moisture absorption performance and the contact cold feeling were maintained even when the washing was performed, and the dyeing fastness was excellent.

[Example 33]

Except that the polyamide 6 is not contained in the polyamine, and the magnesium oxide is 1.0% by weight, the relative viscosity of sulfuric acid is 2.60, and the amount of the amine terminal group is 5.98×10 ^-5 mol/g. A core-sheath composite fiber of 56 dtex 24 monofilament was obtained in the same manner as in Example 28.

The amount of magnesium oxide of the obtained core-sheath composite fiber was 0.5% by weight. The physical properties of the fibers are shown in Table 9.

It was found that the moisture absorption performance and the contact cold feeling were excellent, and the moisture absorption performance and the contact cold feeling were maintained even when the washing was performed, and the dyeing fastness was excellent.

[Comparative Example 8]

, 260 ℃ melted by other polyamide-based nylon 6 chips used not containing titanium oxide, and sulfuric acid relative viscosity of 2.71, terminal amino groups in an amount of 5.95 × 10 ^-5 mol / g using a circular spinning spinneret A 56 dtex 24 monofilament nylon 6 fiber was obtained in the same manner as in Example 28 except that the melt discharge was carried out. The physical properties of the fibers are shown in Table 9. Since Comparative Example 8 is a general nylon 6 fiber, moisture absorption performance and contact cold feeling were inferior.

[Example 34]

Nylon 6 fragments having a polyamine-based titanium oxide content of 0.1% by weight, a sulfuric acid relative viscosity of 2.63, and an amine terminal grouping amount of 5.10×10 ^-5 mol/g were used for the sheath portion, and the rest were in accordance with Example 28 The same method obtained a 56 dtex 24 monofilament core-sheath composite fiber. The physical properties of the fibers are shown in Table 9.

[Example 35]

Nylon 6 fragments having a polyamine-based titanium oxide content of 20% by weight, a sulfuric acid relative viscosity of 2.30, and an amine terminal group amount of 5.21×10 ^-5 mol/g were used for the sheath portion, and the rest were in accordance with Example 28 The same method obtained a 56 dtex 24 monofilament core-sheath composite fiber.

Broken yarn often occurs during spinning. The physical properties of the fibers are shown in Table 10.

It was found that the moisture absorption performance and the contact cold feeling were excellent, and the moisture absorption performance and the contact cold feeling were maintained even when the washing was performed, and the dyeing fastness was excellent. However, since the amount of titanium oxide is too large, the yarn breakage often occurs, and the tensile strength is a low value of 1.7 cN/dtex, and the strength is insufficient to cause productivity, high-order smoothness, and poor durability of the product, and it is not practical.

[Example 36]

Except for the peripheral speed of the traction roller belonging to the first roller being 2381 m/min, the peripheral speed of the stretching roller belonging to the second roller being 3571 m/min, and the winding speed being 3500 m/min, the others were in accordance with Example 29 The same method obtained a 56 dtex 24 monofilament core-sheath composite fiber. The physical properties of the fibers are shown in Table 10.

By applying an appropriate extension to the sheath polyamine to control the alpha crystallization alignment parameter of the sheath, it is possible to maintain the hygroscopic property and contact well even if the washing is performed. A core-sheath composite fiber excellent in cold feeling and excellent in dye fastness.

[Example 37]

Except for the peripheral speed of the traction roller belonging to the first roller being 2245 m/min, the peripheral speed of the stretching roller belonging to the second roller being 3367 m/min, and the winding speed being 3300 m/min, the others were in accordance with Example 29 The same method obtained a 56 dtex 24 monofilament core-sheath composite fiber. The physical properties of the fibers are shown in Table 10.

By controlling the α-crystal alignment parameter of the sheath portion by appropriately extending the polyamine of the sheath portion, it is possible to obtain a core-sheath composite fiber excellent in moisture absorption performance and contact cold feeling even if washing is performed, and the dyeing fastness is excellent. .

[Example 38]

Except for the peripheral speed of the traction roller belonging to the first roller being 4474 m/min, the peripheral speed of the stretching roller belonging to the second roller being 4474 m/min, and the winding speed being 4250 m/min, the others were in accordance with Example 29 The same method obtained a 56 dtex 24 monofilament core-sheath composite fiber. The physical properties of the fibers are shown in Table 10.

By controlling the α-crystal alignment parameter of the sheath portion by appropriately extending the sheath polyamine, a core-sheath composite fiber excellent in moisture absorption performance and contact cold feeling and excellent in dye fastness can be obtained even if washing is performed.

[Example 39]

A 56 dtex 24 monofilament core-sheath composite fiber was obtained in the same manner as in Example 29 except that the core-sheath ratio (parts by weight) = 30/70 was used for the spinning. The physical properties of the obtained fiber are shown in Table 10.

By controlling the α-crystal alignment parameter of the sheath portion by setting the ratio of the core-sheath ratio to an appropriate ratio, it is possible to obtain a core-sheath composite fiber excellent in moisture absorption performance and contact cold feeling even when washing is performed, and the dyeing fastness is excellent.

[Embodiment 40]

A core-sheath composite fiber of 56 dtex 24 monofilament was obtained in the same manner as in Example 29 except that spinning was carried out in such a manner that the core-sheath ratio (parts by weight) = 20/80. The physical properties of the obtained fiber are shown in Table 10.

By controlling the α-crystal alignment parameter of the sheath portion by setting the ratio of the core-sheath ratio to an appropriate ratio, it is possible to obtain a core-sheath composite fiber excellent in moisture absorption performance and contact cold feeling even when washing is performed, and the dyeing fastness is excellent.

[Example 41]

A core-sheath composite fiber of 56 dtex 24 monofilament was obtained in the same manner as in Example 29 except that spinning was carried out in such a manner that the core-sheath ratio (parts by weight) = 70/30. The physical properties of the obtained fiber are shown in Table 10.

By controlling the α-crystal alignment parameter of the sheath portion by setting the ratio of the core-sheath ratio to an appropriate ratio, it is possible to obtain a core-sheath composite fiber excellent in moisture absorption performance and contact cold feeling even when washing is performed, and the dyeing fastness is excellent.

[Example 42]

A core-sheath composite fiber of 56 dtex 24 monofilament was obtained in the same manner as in Example 29 except that spinning was carried out in such a manner that the core-sheath ratio (parts by weight) = 80/20.

The physical properties of the obtained fiber are shown in Table 10.

By controlling the α-crystal alignment parameter of the sheath portion by setting the ratio of the core-sheath ratio to an appropriate ratio, it is possible to obtain a core-sheath composite fiber excellent in moisture absorption performance and contact cold feeling even when washing is performed, and the dyeing fastness is excellent.

(industrial availability)

The core-sheath composite yarn of the present invention can provide a core-sheath composite yarn having high moisture absorption property and having comfort superior to that of natural fibers, and washing durability and dye fastness which can withstand the moisture absorption property actually used.

Claims (10)

A core-sheath composite yarn, wherein the sheath portion polymer is polyamine and the core portion is a thermoplastic polymer, and the moisture absorption and desorption (ΔMR) is 5.0% or more, and the ΔMR retention rate after washing 20 times is 90%. Above and above 100%. The core-sheath composite yarn of claim 1, wherein the washing fastness is 3 or more and 5 or less. The core-sheath composite yarn according to claim 1 or 2, wherein the sheath-polymer has an α-crystal alignment parameter of 1.9 or more and 2.7 or less, and a thermoplastic polymer-based polyetheresteramine copolymer of the core. The core-sheath composite yarn according to any one of claims 1 to 3, wherein the amine-based terminal group of the sheath-core polymer of the core-sheath composite yarn is 3.5×10 ^-5 mol/g or more and 8.0×10 ^-5 mol /g below. The core-sheath composite yarn according to any one of claims 1 to 4, wherein the flatness is 1.5 or more and 5.0 or less. The core-sheath composite yarn according to any one of claims 1 to 2, wherein the entire fiber contains 0.1 to 5% by weight of the inorganic particles. The core-sheath composite yarn according to claim 6, wherein the α-crystal alignment parameter of the sheath polymer is 1.7 or more and 2.6 or less. The core-sheath composite yarn according to claim 6 or 7, wherein the sheath polymer contains 0.2 to 6% by weight of the inorganic particles. The core-sheath composite yarn according to any one of claims 6 to 8, wherein the inorganic particles are titanium oxide. A fabric comprising at least a portion of the core-sheath composite yarn of any one of claims 1 to 9.