JPH101835A - Textured yarn having heat-accumulating conjugate structure and cloth produced by using the yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce the subject yarn giving a sportswear with beautiful color, comfortability and warmness and achieving high temperature-increasing effect even in a low-temperature environment or in a windy day and prepare a cloth produced by using the yarn. SOLUTION: This textured conjugate yarn is composed of a polyester fiber yarn and/or a polyamide fiber yarn and has a structure consisting of a sheath yarn wound around a core yarn. The core yarn contains >=0.4wt.% of a heat- accumulating agent based on the whole textured yarn having the conjugate structure and the fineness of the sheath yarn is 40-80% of the total fineness of the textured conjugate yarn. The sheath yarn is a modified cross-section single fiber having a circumferential length ratio Lr of >=1.25. The value Lr is defined by the formula Lr=L1 /L2 wherein L1 is the circumferential length (cm) of the single sheath yarn and L2 is the circumferential length (cm) of a circular cross-section yarn having a cross-sectional area equal to that of the single sheath yarn [S1 (cm<2> )] and is calculated by L2 =2×(π×S1 )<0.5> .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-storing composite structural yarn, and more particularly, to a heat-storing composite structural yarn suitable for sports clothing such as ski wear exhibiting beautiful colors and excellent heat storage characteristics, and a fabric using the same. About.

[0002]

2. Description of the Related Art In the field of clothing, the pursuit of beauty and comfort has been pursued along with the sophistication of fashion and the diversification and sophistication of leisure and sports, and synthetic fibers for clothing have aesthetic elements. And high functionality is required. In recent years, winter sports have become popular, and skiwear, skatewear, and the like having a beautiful color and comfort have come to be preferred. The primary function that determines the comfort of winter sports clothing is heat retention (warmth)
In recent years, as a fiber having such a function, a synthetic fiber obtained by kneading carbon black having a property of increasing the temperature when exposed to sunlight or artificial light, ie, a heat storage property, into a polymer has been proposed ( JP-A-7-82607 and JP-A-7-90723.

However, since synthetic fibers containing carbon black exhibit a black color, only black fabrics can be obtained from such fibers, and beautiful colors can be obtained by dyeing such black fabrics with other colors. However, it could not be dyed into a garment and was insufficient for use in clothing that emphasized fashionability. In addition, for the purpose of achieving both beautiful colors and high heat retention, a thermal storage yarn “Solar α (trademark registration)” kneaded with zirconium carbide as a thermal storage agent is commercially available. However, zirconium carbide is extremely expensive, and its color is not black, but it is gray, which is not satisfactory in terms of beauty. As described above, the conventional fiber having heat storage properties is insufficient for use in clothing, which emphasizes comfort and fashion. Furthermore, conventional fibers having heat storage properties absorb light energy and convert it into heat energy to generate heat.However, the heat storage fibers are in direct contact with the outside air, resulting in large heat dissipation, especially in low-temperature environments or when there is wind. The effect of raising the temperature was small.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide sports clothing including winter sports clothing such as ski wear with both beautiful colors and comfort, that is, warmth. Another object of the present invention is to provide a heat-storable composite structure processed yarn capable of obtaining a high temperature-raising effect even in a low-temperature environment or in the presence of wind, and a fabric using the same.

[0005]

Means for Solving the Problems In view of the above problems, the present inventors have conducted intensive studies and found that a sheath yarn having a specific fineness ratio was wound around a core yarn containing a specific amount of a heat storage agent. By using a processed yarn having a structure, it has been found that excellent heat storage characteristics of the core yarn and excellent dyeability of the sheath yarn can be obtained at the same time, and that the temperature-raising effect can be enhanced, and the present invention has been achieved. is there. The invention claimed in the present invention is as follows.

(1) A composite yarn composed of polyester fiber yarn and / or polyamide fiber yarn having a structure in which a sheath yarn is wound around a core yarn, wherein the core yarn has a heat storage agent in a composite structure. A heat-storing composite structure processed yarn comprising 0.4% by weight or more based on the whole processed yarn, and the fineness of the sheath yarn is 40 to 80% of the fineness of the entire composite structure processed yarn. (2) The heat storage agent is carbon black, zirconium carbide, titanium carbide, hafnium carbide, zirconium silicide,
The heat-storable composite structure processed yarn according to (1), which is at least one selected from titanium silicide, titanium black, and hafnium silicide. (3) The heat storage composite structure processed yarn according to (1), wherein the heat storage agent is carbon black. (4) the sheath yarn perimeter ratio L _r calculated by the following formula 1.25
The heat-storable composite structure processed yarn according to (1), comprising a single yarn having the above-mentioned irregular cross-sectional shape. L _r = L ₁ / L ₂ (where L ₁ represents the circumference of a single yarn of the sheath yarn (cm), and L ₂ is a circular cross-section yarn having the same area as the single yarn cross-sectional area S ₁ (cm ² ) of the sheath yarn. Circumference
(cm), and is calculated by L ₂ = 2 × (π × S ₁ ) ^0.5 . (5) The method according to any one of (1) to (4), wherein the total denier of the sheath yarn is 30 to 500 denier, and the single yarn denier is 0.5 to 2.5 denier. Heat storage composite structure processing yarn. (6) A fabric using the heat-storable composite structure processed yarn according to any one of (1) to (5).

In the present invention, the heat-storing composite structure processed yarn has a sheath-core structure in which a sheath yarn is wound around a core yarn, that is, the core yarn absorbs light energy and changes into heat energy. Fiber yarn containing heat storage agent particles such as carbon black and zirconium carbide, and the sheath yarn is wound around the core yarn at a specific fineness ratio that does not hinder the heat storage characteristics, resulting in excellent heat storage characteristics And, even if the core yarn contains a heat storage agent exhibiting a dark color such as black or gray, the influence of the black or gray core yarn is minimized by the sheath yarn wound around it, A beautiful chromatic color can be exhibited. Furthermore, since the periphery of the core yarn containing the heat storage agent can be covered with the sheath yarn, an excellent temperature-raising effect can be obtained even in a low-temperature environment or in the presence of wind. Hereinafter, the heat storage composite structure processed yarn of the present invention will be described in detail.

The composite structural yarn of the present invention comprises a polyester fiber yarn and / or a polyamide fiber yarn.
Known polyesters such as polyethylene terephthalate, polybutylene terephthalate, and copolymers thereof are used as the polyester, and may include additives such as a matting agent, a heat stabilizer, and an antistatic agent. Known polyamides such as polyhexamethylene adipamide, polycapramide, and copolymers thereof are used as the polyamide, and may contain additives similarly to the polyester. POY yarn,
FOY yarn or the like is preferably used. Further, the composite structure processed yarn of the present invention has a structure in which the sheath yarn is wound around the core yarn as described above, but when the sheath yarn is not wound around the core yarn, the black of the core yarn is Are easy to see, unevenness due to the color of the core yarn appears, and a beautiful color cannot be obtained even if the processed yarn is dyed chromatic. As a method of winding the sheath yarn around the core yarn, a method of compound false twisting of the sheath yarn and the core yarn, a method of blending the sheath yarn and the core yarn by interlacing and then twisting the yarn, and covering the sheath yarn with the core yarn And the like.

The core yarn used in the present invention contains a heat storage agent in an amount of 0.4% by weight or more based on the entire composite structure processed yarn.
If the content of the heat storage agent is less than 0.4% by weight, sufficient heat storage characteristics cannot be obtained. From the viewpoint of the balance between heat storage characteristics and beautiful color development, it is preferable to contain the heat storage agent in the range of 0.4 to 1.8% by weight. The heat storage agent is not particularly limited as long as it has a heat storage characteristic of absorbing light energy when exposed to sunlight or artificial light, converting this to heat energy, and raising the temperature. Carbon black, zirconium carbide, titanium carbide, hafnium carbide,
Fine particles such as zirconium silicide, titanium silicide, titanium black, and hafnium silicide can be used. From the viewpoint of cost, carbon black having a high heat storage effect by light energy absorption is preferable.

Means for causing the core yarn to contain a heat storage agent include:
Known means can be adopted. For example, a method of blending a polymer chip and a heat storage agent in a required ratio, melt-blending with an extruder, producing a high-concentration heat storage agent-containing chip, mixing with a polymer not containing a heat storage agent again, and melt-spinning. A method of mixing a heat storage agent so that it becomes equal to the final concentration in the polymerization stage, a method of spraying the heat storage agent in the spinning drying stage and kneading with an extruder, and a method in which the polymer containing the high concentration heat storage agent is polymerized in the polymerization stage and is not contained. A method in which the polymer is blended at an appropriate ratio and kneaded with an extruder may be used.
The fineness of the core yarn is 1 to 20 denier for single yarn denier and 3 for total denier from the viewpoint of firmness and firmness when formed into a fabric.
A range of 0 to 500 denier is preferred. More preferred total denier of the core yarn is in the range of 30 to 100 denier.

The fineness of the sheath yarn used in the present invention is 40 to 80%, preferably 50 to 80% of the fineness of the whole composite structure processed yarn.
It is in the range of 70%. If the fineness of the sheath yarn is less than 40% of the fineness of the entire composite structure processed yarn, the color of the core yarn is easy to see, spots appear, and even if dyed in chromatic colors, beautiful colors cannot be obtained.
Further, it becomes difficult to form an effective heat insulating layer for preventing heat radiation of the core yarn, and high heat storage characteristics cannot be obtained.
Further, when the fineness of the sheath yarn exceeds 80% of the fineness of the entire composite structure processed yarn, the temperature rising speed and the temperature rising during light irradiation become low. This is considered to be because light is difficult to reach the core yarn containing the heat storage agent because the amount of the sheath yarn is too large.

In the present invention, the cross section of the single yarn of the sheath yarn is not particularly limited, and round, triangular, Y-type, W-type, L-type, I-type or the like, or a fiber yarn having these hollow cross-sectional shapes is used. However, the cross-sectional shape of the single yarn of the sheath yarn is irregular, and the circumferential length ratio L _r
Is preferably 1.25 or more, more preferably in the range of 1.3 to 3. The perimeter ratio L _r of the sheath yarn 1.25
By the above, the covering effect of the core yarn by the sheath yarn is enhanced, the black color and the like of the core yarn containing the heat storage agent are hardly seen, a beautiful color is obtained, and the heat radiation of the core yarn is effectively prevented. It is possible to form a suitable heat insulating layer.
That is, when a sheath yarn composed of a single yarn having a circumference ratio of less than 1.25 is used, the heat storage characteristics and the coloring properties are poor. The circumference ratio _Lr is obtained by the following equation. L _r = L ₁ / L ₂ (where L ₁ represents the circumference of a single yarn of the sheath yarn (cm), and L ₂ is a circular cross-section yarn having the same area as the single yarn cross-sectional area S ₁ (cm ² ) of the sheath yarn. Circumference
(cm), and is calculated by L ₂ = 2 × (π × S ₁ ) ^0.5 . As the cross-sectional shape of the single yarn cross section of the sheath yarn, W type, L type, I type and the like are preferable in view of the effect of covering the core yarn and the ease of producing the fiber yarn.

The fineness of the sheath yarn is preferably in the range of 0.1 to 5 denier for the single yarn denier and 30 to 500 denier for the total denier in view of the ease of winding the core yarn. Further, a sheath yarn having a single yarn denier in the range of 0.5 to 2.5 denier is more preferable because the sheath yarn easily covers the periphery of the core yarn and a heat insulating layer is easily formed by dead air. Use when the peripheral length ratio L _r of a single yarn of the sheath yarn is circular in 1.0, the single yarn denier yarn is reduced, by a large total denier, the sheath yarn of the modified cross-section The heat storage characteristics, dyeability, and temperature raising effect of the processed yarn can be improved in the same manner as in the case where the heat treatment is performed.

[0014] The preferred boiling water shrinkage of the core yarn and the sheath yarn used in the composite structure processed yarn is -15 to 70%. The preferred boiling water shrinkage of the core yarn and the sheath yarn in the composite structure processed yarn is -10 to 10%. Further, the breaking strength of the core yarn is preferably 3 g / d or more from the viewpoint of strength when formed into a fabric, and the breaking strength of the sheath yarn is preferably 0.5 g / d or more for the same reason. From the viewpoint of processing stability, the breaking elongation of the core yarn is 1
Preferably, the breaking elongation of the sheath yarn is 0.5 to 180%. Although the heat storage composite structure processed yarn of the present invention is made into a fabric by a known method, other fibers, processed yarns, and the like can be used together with the fabric at the time of fabric production as long as the object of the present invention is not impaired.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of an apparatus (a false twisting machine) for producing a composite structure processed yarn according to an embodiment of the present invention. In FIG. 1, a supply yarn 1 for a sheath yarn and a supply yarn 2 for a core yarn are successively guided to a feed roll 3, an interlacer 4, a feed roll 5, a tube heater 6, a twin belt and a feed roll 8, and a composite structure processed yarn. 9 is assumed. As the supply yarn 1 for the sheath yarn, for example, a partially oriented yarn (POY) of polyester
And the elongation at break is 50 to 180%, and the shrinkage ratio of boiling water is -15.
７０70% is used. Here, those having a negative value of the boiling water shrinkage ratio are those that spontaneously expand when the yarn is treated in boiling water. As the supply yarn 2 for the core yarn, a drawn polyester yarn or drawn polyamide yarn containing, for example, 2.0% by weight of carbon black is used.

The fineness of the supply yarn for the sheath yarn and the core yarn and the content of carbon black in the core yarn are, for example, 75 d for the sheath yarn and 25 d for the core yarn. 0.6% by weight or more. The supply yarn 1 for the sheath yarn and the supply yarn 2 for the core yarn are combined by a feed roll 3 and entangled by an interlacer 4. Subsequently, the supply yarn after the twining is entangled is led to the false twisting step, and the feed roll 5 and the feed roll 8 feed at a feed rate of −2.0 to −10.0%,
The composite false twist is performed in the heater 6 under the conditions of a temperature of 100 to 180 ° C. and an appropriate number of twists according to the fineness, guided to a winding step, wound into a cheese-like package, and formed into a composite structure processing yarn 9. Is done.

[0017]

The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the invention thereto. In addition,
The circumference ratio of the single sheath yarn and the heat storage characteristics of the composite structure processed yarn in the examples were measured by the following methods. (1) the cross-sectional area S ₁ and the circumferential length L ₁ of the sheath yarn side single yarn from the circumferential length ratio L _r composite structure textured yarn of the optical microscope cross section photographs or the images on measured by the image analysis, the following formula (ii Request perimeter ratio L _r according). From the area S ₁ of the modified cross-section yarn, a circular cross-section yarn having the same cross-sectional area is assumed, and its circumferential length L ₂ is represented by the following formula (i).
Is calculated. L ₂ = 2 × (π × S ₁ ) ^0.5 (i) Perimeter ratio = L ₁ / L ₂ (ii)

(2) Thermal storage characteristics of composite structure processed yarn Environment 1: temperature 20 ° C., humidity 65% RH, wind speed 0 m / s Environment 2: temperature 5 ° C., humidity 33% RH, wind speed 0 m / s Environment 3: temperature 5 ° C. In each environment in an environmental test chamber having a humidity of 33% RH and a wind speed of 2.5 m / s, a cloth sample cut into a square of 10 cm was irradiated vertically with a 500 W reflex lamp from a position 1 m away from the sample, The degree of heat storage is measured by measuring the degree of temperature rise of the sample. The temperature is measured by applying a contact thermometer to the center of the back of the sample, and the point where the temperature of the sample reaches a constant temperature is defined as a measured value. Thermal storage characteristics (° C) = temperature during light irradiation (° C)-temperature before light irradiation (° C)

EXAMPLES 1 TO 6 AND COMPARATIVE EXAMPLES 1 AND 2 Using the false twisting machine shown in FIG. 1, a production test of a heat-storing composite structure processed yarn was performed as follows. That is, the supply yarn 1 for the sheath yarn and the supply yarn 2 for the core yarn are combined by the feed roll 3, and entanglement of 30 to 80 yarns / m is added by an interlacer. Subsequently, the supply yarn after the twining was entangled was guided to a false twisting process, and subjected to composite false twisting under the conditions shown in Table 1. Further, the obtained composite structure processed yarn was guided to a winding process, and wound into a cheese-like package to obtain a sample.

[0020]

[Table 1]

At this time, the heat storage agent content in the composite structure processed yarn and the circumference ratio were changed variously. The method of including a heat storage agent in the supply yarn for the core yarn is as follows: polymer chip: heat storage agent = 9: 1
And then kneaded in a molten state with a twin screw extruder, extruded into strands, cooled and cut again into chips. Then, after blending at a ratio of heat storage agent-containing chip: heat storage agent-free chip = 1: 4 and melt-spinning, it was hot-drawn by a usual method to obtain a core yarn supply yarn. The heat storage characteristics and color tone (degree of heather) of the fabric produced using the obtained composite false twisted yarn were examined, and the results are shown in Table 2. The following were used for the supply yarn for the sheath yarn and the supply yarn for the core yarn.

(1) Supply Yarn for Sheath Yarn It is made of polyethylene terephthalate having an intrinsic viscosity [η] = 0.65 and containing 0.5% by weight of TiO ₂ , and the single yarn has a W-shaped cross section as shown in FIG. And POY-A and POY-B having the following characteristics were used. Further, POY-C and POY-D made of polyethylene terephthalate having an intrinsic viscosity [η] of 0.65 and containing 0.5% by weight of TiO ₂ and having a round cross section of a single yarn were used.

POY-A (W section) Fineness: 75/30 d / f Breaking strength: 2.57 g / d Breaking elongation: 118% Boiling water shrinkage: 64.5% Two POY-B POY-A What was plied. Therefore, the fineness is 150 /
It has the same characteristics as POY-A except that it becomes 60 d / f. POY-C (round section) Fineness: 75/30 d / f Breaking strength: 2.65 g / d Breaking elongation: 120% Boiling water shrinkage: 63.5% POY-D (round section) Fineness: 75/72 d / f Breaking strength: 2.60 g / d Breaking elongation: 117% Boiling water shrinkage: 63.9%

(2) Supply Yarn for Core Yarn Carbon black with an intrinsic viscosity [η] = 0.65 and 2.0
Weight percent polyethylene terephthalate,
FOY-A or FOY-B having a circular cross section and the following characteristics was used. In addition, for comparison, among the above characteristics, F
OY-C was used. Further, FOY-D made of polyethylene terephthalate having an intrinsic viscosity [η] = 0.65 and containing 2.0% by weight of zirconium carbide, having a circular cross section of all single yarns, and having the following characteristics was used. .

FOY-A (carbon black-containing yarn) Fineness: 50/30 d / f Breaking strength: 4.70 g / d Breaking elongation: 32.8% Boiling water shrinkage: 8.6% FOY-B FOY- A with two A yarns. Therefore, the fineness is 95.
Except for 4/60 d / f, it has the same characteristics as FOY-A. FOY-C (without heat storage agent) Fineness: 40/24 d / f Breaking strength: 5.58 g / d Breaking elongation: 32.3% Boiling water shrinkage: 7.45% FOY-D (yarn containing zirconium carbide) ) Fineness: 50/30 d / f Breaking strength: 4.30 g / d Breaking elongation: 32.0% Boiling water shrinkage: 8.2%

[0026]

[Table 2]

The heat storage characteristics are as follows.
Comparative Example 1, Comparative Example 2, Examples 1 to 50% by weight or more
6 was good. Furthermore, in Environment 2 and Environment 3, Examples 1 to 6 in which a sheath yarn was wound around a core yarn containing a heat storage agent were favorable,
In particular, Examples 1 to 3 having a sheath yarn circumference ratio of 1.44 and Example 5 which is a high multi yarn having a small single yarn denier and a large number of filaments of the sheath yarn had excellent heat storage characteristics. Further, the color tone (degree of the heather) was the same as that of Examples 1 to 4 in which the circumference ratio of the sheath yarn was 1.44.
3, Comparative Example 2, and Example 5 in which the sheath yarn was a high-multi yarn, were good because almost no heat spot was felt. In Example 4,
Since the circumference ratio of the sheath yarn was 1.00 and the single yarn denier was thick, the coating of the core yarn was slightly inferior, but no black spots were observed and the heat storage characteristics were good.

[0028]

According to the heat-storing composite structure processed yarn of the present invention and the fabric using the same, even if it contains a heat storage agent exhibiting black or gray, when it is dyed into a chromatic color such as red or blue, It can be dyed in a beautiful color with little black spots, and when heated by sunlight or artificial light, the temperature rises to about 5-18 ° C, and excellent heat storage characteristics can be obtained. It is possible to obtain a high temperature raising effect in windy or windy conditions. The use of the composite structural yarn of the present invention has made it possible to obtain, for the first time, winter sportswear exhibiting chromatic heat storage properties.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an apparatus for producing a heat storage composite structure processed yarn according to an embodiment of the present invention.

FIG. 2 is a diagram showing a cross-sectional shape of a sheath yarn used in an example of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Supply yarn for sheath yarn, 2 ... Supply yarn for core yarn, 3 ... Feed roll, 4 ... Interlacer, 5 ... Feed roll, 6 ... Tube heater, 7 ... Twister belt, 8 ... Feed roll, 9 ... Composite structure processing yarn

Claims (6)

[Claims] 1. A composite structural yarn comprising a polyester fiber yarn and / or a polyamide fiber yarn having a structure in which a sheath yarn is wound around a core yarn, wherein the core yarn comprises a heat storage agent. 0.4% by weight or more based on the whole yarn, and the fineness of the sheath yarn is 4% of the fineness of the whole composite structure processed yarn.
A heat-storing composite structure processed yarn having a content of 0 to 80%. 2. The heat storage agent is at least one selected from the group consisting of carbon black, zirconium carbide, titanium carbide, hafnium carbide, zirconium silicide, titanium silicide, titanium black and hafnium silicide. Heat storage composite structure yarn. 3. The heat storage composite structure processed yarn according to claim 1, wherein the heat storage agent is carbon black. 4. A heat storage composite structure textured yarn according to claim 1, wherein the sheath yarn is composed of a single yarn of modified cross-section shape is 1.25 or more perimeter ratio L _r calculated by the following equation. L _r = L ₁ / L ₂ (where L ₁ represents the circumference of a single yarn of the sheath yarn (cm), and L ₂ is a circular cross-section yarn having the same area as the single yarn cross-sectional area S ₁ (cm ² ) of the sheath yarn. Circumference
(cm), and is calculated by L ₂ = 2 × (π × S ₁ ) ^0.5 . ) 5. The heat storage according to claim 1, wherein a total denier of the sheath yarn is 30 to 500 denier and a single yarn denier is 0.5 to 2.5 denier. Composite structure processing yarn. 6. A fabric using the heat-storable composite structure processed yarn according to any one of claims 1 to 5.