JP2015010282A - Woven or knitted fabric excellent in heat shielding properties and heat radiation properties and textile products - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a woven or knitted fabric excellent in heat shielding properties and heat radiation properties and textile products.SOLUTION: The woven or knitted fabric has a multilayer structure composed of two or more layers, in which either one layer comprises fibers having a flat cross section and other layer(s) comprise(s) false-twist crimped yarns. It is preferable that the fibers having a flat cross section are polyester fibers having a flat cross section which comprises 1.0 wt.% or more of a matting agent and the cross sectional shape of a single fiber of which is a flat cross section having two or more constricted parts and a cross sectional flatness of 2 to 6. The false-twist crimped yarn is composed of two or more kinds of false-twist crimped yarns and is included as a composite yarn having a torque of 30 T/m or less.

Description

    The present invention relates to a woven or knitted fabric and a textile product excellent in heat shielding and heat dissipation.

Conventionally, it has been proposed to use matte-containing fibers in order to shield sunlight irradiated under the hot sun in the summer, or to increase the woven / knitted density of the fabric to reduce the inter-texture of the fabric. Has been.
However, when the inter-tissue gap of the fabric is reduced, the heat shielding property is improved. However, when the wearer's body temperature rises due to an increase in the outside air temperature or exercise, the heat dissipation is low due to the low heat dissipation of the fabric, so There was a problem of feeling. On the contrary, when the inter-texture space of the fabric is increased in order to improve the heat dissipation of the fabric, there is a problem that the heat shielding property is lowered.
Thus, heat insulation and heat dissipation are contradictory properties, and fabrics excellent in heat insulation and heat dissipation have not been proposed so far.

JP2012-21245A

  This invention is made | formed in view of said background, The objective is to provide the woven / knitted fabric and textiles excellent in heat-shielding property and heat dissipation.

  As a result of intensive studies to achieve the above-mentioned problems, the inventor has arranged a flat cross-section fiber in one of the layers in a woven or knitted fabric having two or more layers, and false twist crimping in the other layers. By arranging the yarn, it was found that a fabric excellent in heat-shielding property and heat-dissipating property can be obtained by the synergistic action of both fibers, and the present invention has been completed by intensive studies.

Thus, according to the present invention, “a knitted fabric having a multilayer structure of two or more layers, wherein one of the layers includes a flat cross-section fiber, and the other layer includes false twisted crimped yarn. A woven or knitted fabric excellent in heat and heat dissipation properties is provided.
In that case, it is preferable that the said flat cross-section fiber contains 1.0 weight% or more of matting agents. Moreover, in the said flat cross-section fiber, it is preferable that the cross-sectional shape of a single fiber is a flat cross section of the cross-sectional flatness 2-6 which has a constriction part of two or more places. Moreover, it is preferable that the flat cross-section fiber is a multifilament having a total fineness of 33 to 167 dtex and having 12 or more filaments. The flat cross-section fiber is preferably made of polyester. In the false twist crimped yarn, the crimp rate is preferably 5% or more. The false twist crimped yarn is preferably a multifilament having a total fineness of 33 to 167 dtex and a filament count of 48 or more. Moreover, it is preferable that the false twist crimped yarn is included in the woven or knitted fabric as a composite yarn composed of two or more types of false twist crimped yarn and having a torque of 30 T / m or less. The false twist crimped yarn is preferably made of polyester. Moreover, it is preferable that only the flat cross-section fiber is exposed on one surface of the woven or knitted fabric.

In the woven or knitted fabric of the present invention, the basis weight of the woven or knitted fabric is preferably in the range of 50 to 200 g / m ² . The air permeability of the woven or knitted fabric is preferably 50 cc / cm ² · sec or more. Moreover, it is preferable that the heat radiation amount of the woven or knitted fabric is 98 W / m ² or more. The woven or knitted fabric preferably has a UPF (ultraviolet ray protection coefficient) of 10 or more. Moreover, it is preferable that the average infrared reflectance of wavelength 700-1400 nm is 62% or more. Moreover, it is preferable that the contact cooling sensation Q-max of the woven or knitted fabric is 0.2 J / cm ² · sec or more. Further, when 0.6 cc of water is dropped on the woven or knitted fabric, it is preferable that the time for reaching the diffusive residual moisture content of 5% or less is 100 minutes or less.
Further, according to the present invention, there is provided a textile product selected from the group consisting of clothing, artificial leather, footwear, heels, curtains, tents, sleeping bags, tarpaulins, and car seats using the woven or knitted fabric. Provided.

  ADVANTAGE OF THE INVENTION According to this invention, the woven / knitted fabric and textiles excellent in heat insulation and heat dissipation are obtained.

In this invention, the flat cross-sectional shape which has a constriction part which can be employ | adopted as a cross-sectional shape of a single fiber is typically illustrated. It is a knitting structure (one-sided connection (back use) structure) used in Example 1. It is the knitting structure (reversible tengu structure) used in Example 2. FIG. 6 is a diagram showing a knitting structure (single knit mistake structure) used in Example 3. FIG. 3 is a knitting structure (tenji structure) used in Comparative Example 1.

  First, in the flat cross-section fiber used in the present invention, the cross-sectional shape of the single fiber may be such that the diameter of the circumscribed circle is larger than the diameter of the inscribed circle. In particular, when a flat cross section having a cross section flatness of 2 to 6 having two or more constricted portions as schematically shown in FIG. It is preferable because thermal properties are improved. The cross-sectional flatness is a ratio (B / C1) between the length (B) of the long side and the length (C1) of the short side shown in FIG. Further, the constricted portion is a portion where the length of the short side is shortened as schematically shown in FIG. In such a constricted portion, the depth of the concave portion is a depth that is 1.05 or more (preferably 1.1 to 2.0) in a ratio (C1 / C2) between the maximum value and the minimum value of the short side length. It is preferable. FIG. 1 illustrates the case where there are three constricted portions.

  The polymer that forms the flat cross-section fiber may be a normal fiber-forming polymer such as a polyester polymer, a polyamide polymer, or a polyolefin polymer, but is preferably a polyester polymer in terms of weather resistance and fiber strength.

  Preferred examples of the polyester polymer include polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid, stereocomplex polylactic acid, and polyester obtained by copolymerizing a third component. Examples of such polyester include material-recycled or chemical-recycled polyester, and polyethylene terephthalate using a monomer component obtained by using biomass, that is, a biological material as a raw material, described in JP-A-2009-091694. May be. Furthermore, the polyester obtained using the catalyst containing the specific phosphorus compound and titanium compound which are described in Unexamined-Japanese-Patent No. 2004-270097 and 2004-21268 may be sufficient.

  When the matting agent (titanium dioxide) is contained in the polymer in an amount of 1.0% by weight or more (more preferably 1.0 to 5.0% by weight) relative to the polymer weight, the matting agent causes near infrared rays. Is preferably reflected, and the heat shielding property is improved. If the content of the matting agent is less than 1.0% by weight, sufficient heat shielding properties may not be obtained. In addition, a fine pore-forming agent, a cationic dye dyeing agent, a coloring inhibitor, a heat stabilizer, a fluorescent brightening agent, a coloring agent, a hygroscopic agent, and inorganic fine particles are included as long as the purpose of the present invention is not impaired. 1 type or 2 or more types may be contained.

  In the flat cross-section fiber, the fiber form is not particularly limited, and may be a long fiber (multifilament) or a short fiber. Among them, in order to obtain an excellent heat-shielding effect by reducing the inter-structure voids of the woven or knitted fabric, it is preferable that the fibers are bulky like long fibers (multifilaments) rather than the aggregated fibers like spun yarns. . In such a multifilament, the number of filaments is preferably 12 or more (more preferably 20 to 10000, particularly preferably 29 to 72) as the number of filaments increases in order to obtain an excellent heat shielding effect. The total fineness (the product of the single fiber fineness and the number of filaments) is preferably in the range of 33 to 167 dtex. If the total fineness is less than 33 dtex, the heat shielding property may be impaired. On the contrary, if the total fineness is larger than 167 dtex, the heat dissipation may be impaired.

  Although the manufacturing method of the said flat cross-section fiber is not specifically limited, For example, it can manufacture with the following method. That is, using a die having a flat cross-section, for example, the polyester having an intrinsic viscosity of 0.55 to 0.80 is blended with a matting agent as required in an amount of 1.0% by weight or more based on the polyester weight. The chip is spun by a conventional method and wound once as an unstretched yarn (intermediate oriented yarn) at a speed of 2000 to 4300 m / min and stretched, or stretched before winding to obtain a multifilament. In addition, the intermediate oriented yarn is heat-treated in a relaxed state (overfeed 1.5 to 10%) using a heater heated to 180 to 200 ° C., so that an undrawn yarn having self-extensibility under heating ( Intermediately oriented yarn). Furthermore, false twist crimping, air processing, twisting, or the like may be performed.

On the other hand, the false twist crimped yarn used in the present invention is not particularly limited, but it is preferable that the crimp rate is 5% or more (more preferably 10 to 50%) because excellent heat shielding properties can be obtained.
The false twisted crimped yarn is usually a long fiber (multifilament). In the false twisted crimped yarn, the number of filaments is preferably 12 or more (more preferably) for obtaining an excellent heat shielding effect. 12 to 10,000, particularly preferably 48 to 300). Further, the total fineness (product of single fiber fineness and number of filaments) of the false twist crimped yarn is preferably within a range of 33 to 167 dtex. If the total fineness is less than 33 dtex, the heat shielding property may be impaired. On the contrary, if the total fineness is larger than 167 dtex, the heat dissipation may be impaired.
As the polymer for forming such a false twist crimped yarn, a polyester polymer as described above is preferable.

  In addition, in order to obtain excellent heat shielding properties, the false twist crimped yarn is composed of two or more types of false twist crimped yarn, and is included in the woven or knitted fabric as a composite yarn having a torque of 30 T / m or less. It is preferable that Such a composite yarn can be produced, for example, by the following method. That is, a one-heater false twisted crimped yarn is obtained by twisting the yarn with a twisting device via a first roller and a heat treatment heater having a set temperature of 90 to 220 ° C. (more preferably 100 to 190 ° C.). It may be obtained, or a second heater false twisted crimped yarn may be obtained by introducing it into the second heater zone and subjecting it to a relaxation heat treatment if necessary. The draw ratio during false twisting is preferably in the range of 0.8 to 1.5, and the false twist number is the formula of false twist number (T / m) = (32500 / (Dtex) 1/2) × α. α = 0.5 to 1.5 is preferable, and usually 0.8 to 1.2. However, Dtex is the total fineness of the yarn. As the twisting device to be used, a disk-type or belt-type friction-type twisting device is preferable because it is easy to thread and there is little yarn breakage, but a pin-type twisting device may also be used. Further, depending on the direction of twisting, the torque of the false twist crimped yarn can be selected from the S direction or the Z direction. Next, the composite yarn is obtained by combining two or more types of false twist crimped yarn.

  It is preferable that the composite yarn is entangled by interlace processing. The number of entanglements (interlaces) is preferably in the range of 30 to 90 / m in order not to impair the soft texture and stretchability. If the number is greater than 90 / m, the soft texture and stretchability may be impaired. On the other hand, when the number is less than 30 / m, the converging property of the composite yarn becomes insufficient, and the knitting property may be impaired. In addition, the entanglement process (interlace process) may be performed using a normal interlace nozzle.

  The torque is preferably as small as possible, and most preferably non-torque (0 T / m). In order to achieve such a non-torque, when the false twisted crimped yarn having the torque in the S direction and the false twisted crimped yarn in the Z direction are combined, the same torque is obtained except that the direction of the torque is different. Two types of false twist crimped yarn may be used.

The woven or knitted fabric of the present invention is a woven or knitted fabric having a multilayer structure of two or more layers (more preferably two or three layers, particularly preferably two layers), which includes flat cross-section fibers in any one layer, and other layers. The false twisted yarn is included in (that is, a layer other than the layer including the flat cross-section fiber).
Here, the structure of the woven or knitted fabric is not particularly limited, and may be a weft knitted (circular knitted) structure, a warp knitted structure, or a woven structure. For example, preferred examples of the weft knitting structure include double-knit double-sided knitting, tack knitting, single knit splicing knitting, and knit miss structure. Examples of the warp knitting structure include a half tricot knitting and a satin tricot knitting using two or more rivets. Jacquard edition may be used. Examples of the fabric structure include a weft double woven fabric, a warp double woven fabric, a complete double woven fabric, and a jacquard woven fabric.

Especially, it is preferable that only the said flat cross-section fiber is exposed in either one surface of a woven or knitted fabric. In that case, it is preferable that only the false twist crimped yarn is exposed on the other surface. If only the flat cross-section fibers are exposed on either surface of the woven or knitted fabric, when such a surface is used on the skin side, sweat quickly moves from the skin side surface to the outside air side surface, Heat is dissipated effectively, and a feeling of contact cooling at the time of skin contact is increased, which is preferable. In the woven or knitted fabric of the present invention, the basis weight is preferably in the range of 50 to 200 g / m ² (more preferably 70 to 180 g / m ² ). If the basis weight is greater than 200 g / m ² , the heat dissipation and lightness of the fabric may be impaired. On the other hand, if the basis weight is less than 50 g / m ² , the heat shielding property of the fabric may be impaired.

The thickness of the woven or knitted fabric is preferably in the range of 0.1 to 1.0 mm. If the thickness is greater than 1.0 mm, the heat dissipation and lightness of the fabric may be impaired. Conversely, if the thickness is less than 0.1 mm, the heat shielding property of the fabric may be impaired.
The air permeability of the woven or knitted fabric is preferably 100 cc / cm ² · sec or more (more preferably 100 to 500 cc / cm ² · sec). If the air permeability is less than 100 cc / cm ² · sec, the heat dissipation of the woven or knitted fabric may be deteriorated.

As a method for producing the woven or knitted fabric of the present invention, a normal knitting machine (tricot machine, Russell machine) using the above-described flat cross-section fibers and false twisted crimped yarn, and further using other fibers as necessary. , Circular knitting machines, etc.) and looms (water jet looms, rapier rooms, air jet looms, etc.), and a method of knitting and weaving by a conventional method is exemplified.
In such a woven or knitted fabric, as long as the object of the present invention is not impaired, conventional dyeing finish processing, water absorption processing, water repellent processing, napping processing, ultraviolet shielding or antibacterial agent, deodorant, insect repellent, Various processes that provide functions such as a phosphorescent agent, a retroreflective agent, and a negative ion generator may be additionally applied.

  The woven or knitted fabric thus obtained exhibits excellent heat shielding properties due to the effect of reducing inter-structure voids by the flat cross-section fibers and the bulky effect of the false twist crimped yarn. At the same time, when the layer containing the flat cross-section fibers is used so as to be positioned on the skin side, it is excellent in the transfer of sweat from the skin side surface to the woven / knitted outside air side surface, and the contact cold feeling at the time of skin contact is also increased. The heat from the skin is effectively dissipated, resulting in excellent heat dissipation.

Here, the heat dissipation amount of the woven or knitted fabric is preferably 98 W / m ² or more (more preferably 98 to ²⁰⁰ W / m ² ). The woven or knitted fabric preferably has a UPF (ultraviolet ray protection coefficient) of 10 or more. Moreover, it is preferable that the average infrared reflectance of wavelength 700-1400 nm is 62% or more (more preferably 62-90%). Further, the contact cooling sensation Q-max of the woven or knitted fabric is preferably 0.2 J / cm ² · sec or more (more preferably 0.24 to 0.35 J / cm ² · sec). Moreover, it is preferable that the time for reaching a diffusive residual moisture content of 5% or less upon dropping 0.6 cc of water into the woven or knitted fabric is 100 minutes or less.

  Next, the textile product of the present invention is any fiber selected from the group consisting of clothing, artificial leather, footwear, heels, curtains, tents, sleeping bags, tarpaulins, and car seats, using the woven or knitted fabric. It is a product. Since such a textile product uses the woven or knitted fabric, it is excellent in heat shielding and heat dissipation.

  Here, the clothing includes a soccer shirt, golf shirt, tennis shirt, basket shirt, table tennis shirt, badminton shirt, running shirt, soccer pants, tennis pants, basket pants, table tennis pants, badminton pants, running pants, golf pants, Includes underwear for various sports, innerwear for various sports, sweaters, T-shirts, jerseys, trainers, windbreakers, men's clothing, women's clothing, uniforms, work clothes, and underwear. When the textile is a garment, it is preferable that the layer containing the flat cross-section fibers is positioned on the skin side in order to obtain particularly excellent heat shielding and heat dissipation.

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

(1) Crimp rate A tension of 0.044 cN / dtex was applied to the yarn sample and wound on a cassette frame to prepare a cassette of about 3300 dtex. Two loads of 0.0177 cN / dtex and 0.177 cN / dtex were applied to one end of the cassette, and the length S0 (cm) after 1 minute was measured. Subsequently, it was treated in boiling water at 100 ° C. for 20 minutes with the load of 0.177 cN / dtex removed. Remove the load of 0.0177 cN / dtex after boiling water treatment, let it dry naturally for 24 hours, load 0.0177 cN / dtex and 0.177 cN / dtex again, and adjust the length after 1 minute. S1 (cm) was measured. Next, the load of 0.177 cN / dtex was removed, the length after 1 minute was measured to determine S2 (cm), and the crimp rate was calculated by the following formula. In addition, in the present Example and the comparative example, it represented with the average value of 10 times of measured values.
Crimp rate (%) = ((S1-S2) / S0) × 100

(2) Torque A sample (crimped yarn) of about 70 cm was stretched horizontally, and an initial load of 0.18 mN × display tex (2 mg / de) was hung in the center, and both ends were aligned.
The yarn started to rotate due to the residual torque, but was held as it was until the initial load stopped, and a twisted yarn was obtained. The twisted yarn having a length of 25 cm is measured with a tester under a load of 17.64 mN × display tex (0.2 g / de). The torque (T / m) was calculated by quadrupling the obtained twist number (T / 25 cm).

(3) Content of matting agent Calculated by the following formula.
Matting agent content (%) = Massing agent mass (gr) to be added / Polymer mass before adding matting agent (gr) × 100

(4) Fabric weight A fabric weight (g / m ² ) was measured according to JIS L1018 6.4.

(5) Air permeability The air permeability (cm ³ / cm ² · s) was measured according to JIS L1018 6.34.

(6) Amount of heat dissipation Under the conditions of an ambient temperature of 20 ° C and a hot plate temperature of 30 ° C with Thermolab II manufactured by Kato Tech, the heat radiation amount (heat retention) was measured by placing the back side on the heat source side. The back surface is the fabric surface (rear surface) located on the human body side when the fabric is a textile product.

(7) Cool feeling of contact (Q-max)
Regarding the back side, the contact cooling sensation Q-max value was measured under the conditions of an environmental temperature of 20 ° C. and a hot plate temperature of 40 ° C. with Thermolab II manufactured by Kato Tech. The back surface is the fabric surface (rear surface) located on the human body side when the fabric is a textile product.

(8) UPF (UV protection coefficient)
AS / NZS 4399: 1996 (however, a bandpass filter was installed between the integrating sphere and the detector).

(9) Near-infrared reflectance The average reflectance with respect to near-infrared rays in the wavelength range of 700 to 1400 nm was measured with “UV3100S MPC-3100” manufactured by Shimadzu Corporation. If the reflectance is 62% or more, the heat shielding property is good.

(10) Thickness The thickness (mm) of the woven or knitted fabric was measured according to JIS L1018 6.5.

(11) Ratio of fibers exposed on the front or back surface The ratio of fibers exposed by the yarn mixing ratio of the front yarn (A yarn) or the back yarn (B yarn) exposed on the front or back surface was determined.

(12) Drying rate (diffusible residual moisture content)
0.6 cc of water was dropped onto the suspended woven or knitted fabric, and the time when the moisture content was 10% or less was measured. 100 minutes or less is considered good in sweat-absorbing quick-drying.

[Example 1]
Using circular knitting 28G double machine, surface yarn (A yarn) as semidal polyethylene terephthalate multifilament false twist crimped yarn 84dtex / 72fil (crimp rate 14%), matting agent as back yarn (B yarn) 2 using a flat cross-section fiber 84 dtex / 30 fil having a cross-sectional flatness of 3.2 having a single fiber cross-section of three constricted portions and a polyethylene terephthalate multifilament containing 2.1 wt% of the structure diagram of FIG. I got a knitted fabric. The front yarn is a fiber located on the surface of the fabric located on the outside air side when the fabric is used as a textile product, and the back yarn is the surface of the fabric located on the human body side when the fabric is used as a textile product. It is a fiber that is often located on the (back side).
Next, the knitted fabric was subjected to the same bath treatment with a hydrophilizing agent (polyethylene terephthalate-polyethylene glycol copolymer) in the dyeing step, thereby imparting water absorbency to the knitted fabric.
In the obtained knitted fabric, the basis weight is 135 g / m ² , the thickness is 0.53 mm, the heat dissipation amount is 102 W / m ² , the contact feeling (Q-max value) is 0.261, the near infrared reflectance is 63%, and the air permeability is 180 cm. ³ / cm ² · s, UPF UV protection factor 40, drying rate 34 minutes, flat cross-section fiber (B yarn) ratio on the back surface is 100%, false twist crimped yarn (A yarn) on the surface opposite to the back surface The ratio was 100%, and the fabric was excellent in heat dissipation and water absorption, and very excellent in contact cooling, near infrared reflectance, and UPF (ultraviolet ray protection coefficient). The measurement results are shown in Table 1.
Next, when the knitted fabric was obtained and worn so that the back side was the skin side, it was excellent in heat shielding and heat dissipation.

[Example 2]
Using circular knitting 28G single machine, matte polyethylene terephthalate multifilament false twist crimped yarn 84dtex / 72fil (crimp rate 14%) as front yarn (A yarn), matting agent as back yarn (B yarn) 3 using a flat cross-section fiber 84 dtex / 30 fil with a cross-sectional flatness of 3.2 having a single fiber cross-sectional shape and a constriction part of polyethylene terephthalate multifilament containing 2.1% by weight of the structure diagram of FIG. I got a knitted fabric. The front yarn is a fiber located on the surface of the fabric located on the outside air side when the fabric is used as a textile product, and the back yarn is the surface of the fabric located on the human body side when the fabric is used as a textile product. It is a fiber that is often located on the (back side).
Next, the knitted fabric was subjected to the same bath treatment with a hydrophilizing agent (polyethylene terephthalate-polyethylene glycol copolymer) in the dyeing step, thereby imparting water absorbency to the knitted fabric.
In the obtained knitted fabric, the basis weight is 150 g / m ² , the thickness is 0.45 mm, the heat radiation amount is 99 W / m ² , the cool feeling of contact (Q-max value) is 0.258, the near infrared reflectance is 65%, and the air permeability is 160 cm. ³ / cm ² · s, UPF UV protection factor 10, drying rate 30 minutes, flat cross-section fiber (B yarn) ratio on the back surface is 100%, false twist crimped yarn (A yarn) on the surface opposite to the back surface The ratio was 100%, and the fabric was excellent in heat dissipation, water absorption, contact cooling sensitivity, and near-infrared reflectance. The measurement results are shown in Table 1.

[Example 3]
Using circular knitting 28G single machine, matte polyethylene terephthalate multifilament false twist crimped yarn 84dtex / 72fil (crimp rate 14%) as front yarn (A yarn), matting agent as back yarn (B yarn) 4 using polyethylene terephthalate multifilament containing 2.1% by weight of a flat cross-section fiber 84 dtex / 30 fil with a cross-sectional flatness of 3.2 having a single fiber cross-sectional shape of three constrictions. I got a knitted fabric.
Next, the knitted fabric was subjected to the same bath treatment with a hydrophilizing agent (polyethylene terephthalate-polyethylene glycol copolymer) in the dyeing step, thereby imparting water absorbency to the knitted fabric.
In the obtained knitted fabric, the basis weight is 120 g / m ² , the thickness is 0.43 mm, the heat radiation amount is 98 W / m ² , the cool feeling of contact (Q-max value) is 0.249, the near infrared reflectance is 62%, and the air permeability is 220 cm. ³ / cm ² · s, UPF UV protection factor 15, drying rate 35 minutes, flat cross-section fiber ratio on the back surface is 50%, false twist crimped yarn ratio on the surface opposite to the back surface is 75%, The fabric was excellent in heat quantity, water absorption, contact cooling sensitivity, and near infrared reflectance. The measurement results are shown in Table 1.

[Example 4]
Using a warp knitting 28G tricot machine, surface yarn (A yarn) as semi-dal polyethylene terephthalate multifilament false twist crimped yarn 84 dtex / 72 fil (crimp rate 14%), matting agent as back yarn (B yarn) Using a flat terephthalic fiber 84 dtex / 30 fil with a cross-sectional flatness of 3.2 having a single fiber cross-sectional shape and a constriction part of polyethylene terephthalate multifilament containing 2.1 wt%, a tricot half-textured knitted fabric Obtained.
Next, the knitted fabric was subjected to the same bath treatment with a hydrophilizing agent (polyethylene terephthalate-polyethylene glycol copolymer) in the dyeing step, thereby imparting water absorbency to the knitted fabric.
In the obtained knitted fabric, the basis weight is 180 g / m ² , the thickness is 0.62 mm, the heat radiation amount is 101 W / m ² , the contact feeling (Q-max value) is 0.259, the near infrared reflectance is 62%, and the air permeability is 150 cm. ³ / cm ² · s, UPF UV protection factor 30, the flat cross-section fiber ratio is 50% on the back side, and the false twist crimped yarn ratio is 75% on the surface opposite to the back side. It was a fabric that was excellent in contact cooling and near infrared reflectance. The measurement results are shown in Table 1.

[Comparative Example 1]
A circular knitting 28G single machine was used, and a knitted fabric shown in FIG. 5 was obtained using 100% cotton, a basis weight of 130 g / m ² , and a thickness of 0.67 mm.
In the obtained knitted fabric, the basis weight is 130 g / m ² , the thickness is 0.46 mm, the heat radiation amount is 98 W / m ² , the cool feeling of contact (Q-max value) is 0.215, the near infrared reflectance is 55%, and the air permeability is 120 cm. ³ / cm ² · s, UPF ultraviolet protection factor 5 and drying rate 110 minutes, resulting in a knitted fabric inferior in heat dissipation, near-infrared reflectance, and UPF ultraviolet protection factor, resulting in a poor drying rate. The measurement results are shown in Table 1.

[Comparative Example 2]
In Example 1, the same procedure as in Example 1 was used except that a semi-dal polyethylene terephthalate multifilament false twist crimped yarn 84 dtex / 72fil (crimp rate 14%) was used as the back yarn (B yarn). The basis weight is 140 g / m ² , the thickness is 0.53 mm, the heat radiation amount is 94 W / m ² , the contact cooling feeling (Q-max value) is 0.184, the near infrared reflectance is 65%, the air permeability is 130 cm ³ / cm ² · s, UPF UV protection factor 30, drying rate 46 minutes, (B yarn) ratio on the back surface is 100%, false twist crimped yarn (A yarn) ratio is 100% on the surface opposite to the back surface, Although it was excellent, it was a fabric with no heat dissipation and no contact cooling. The measurement results are shown in Table 1.

  ADVANTAGE OF THE INVENTION According to this invention, the woven / knitted fabric and textiles excellent in heat insulation and heat dissipation are provided, and the industrial value is very large.

B: Length of long side of flat cross section fiber C1: Maximum value of short side length of flat cross section fiber C2: Minimum value of short side length of flat cross section fiber

Claims (18)

  A woven or knitted fabric having a multilayer structure of two or more layers, wherein one of the layers contains flat cross-section fibers, and the other layers contain false twisted crimped yarns, and has excellent heat insulation and heat dissipation Woven knitting.   The woven or knitted fabric excellent in heat-shielding and heat-dissipating properties according to claim 1, wherein the flat cross-section fibers contain 1.0% by weight or more of a matting agent.   The said flat cross-section fiber is excellent in the heat-shielding property and heat dissipation of Claim 1 or Claim 2 whose cross-sectional shape of a single fiber is a flat cross section of the cross-sectional flatness 2-6 which has a constriction part of two or more places. Woven knitting.   The woven or knitted fabric excellent in heat shielding and heat dissipation according to any one of claims 1 to 3, wherein the flat cross-section fibers are multifilaments having a total fineness of 33 to 167 dtex and 12 or more filaments.   The woven or knitted fabric excellent in heat insulation and heat dissipation according to any one of claims 1 to 4, wherein the flat cross-section fibers are made of polyester.   The knitted or knitted fabric excellent in heat shielding and heat dissipation according to any one of claims 1 to 5, wherein the false twisted yarn has a crimp rate of 5% or more.   The woven or knitted fabric excellent in heat insulation and heat dissipation according to any one of claims 1 to 6, wherein the false twist crimped yarn is a multifilament having a total fineness of 33 to 167 dtex and a filament number of 12 or more.   The false twisted crimped yarn is composed of two or more types of false twisted crimped yarn, and is included in the woven or knitted fabric as a composite yarn having a torque of 30 T / m or less. The woven or knitted fabric excellent in heat insulation and heat dissipation described.   The woven or knitted fabric excellent in heat shielding and heat dissipation according to any one of claims 1 to 8, wherein the false twist crimped yarn is made of polyester.   The woven or knitted fabric excellent in heat shielding and heat dissipation according to any one of claims 1 to 9, wherein only the flat cross-section fibers are exposed on either surface of the woven or knitted fabric. Of woven or knitted fabric basis weight is in the range of 50 to 200 g / ^{m 2,} thermal barrier according to any one of claims 1 to 10 and heat dissipation properties better woven or knitted fabric. The woven or knitted fabric excellent in heat shielding and heat dissipation according to any one of claims 1 to 11, wherein the woven or knitted fabric has an air permeability of 50 cc / cm ² · sec or more. The woven or knitted fabric excellent in heat shielding and heat dissipation according to any one of claims 1 to 12, wherein the heat dissipation amount of the woven or knitted fabric is 98 W / m ² or more.   The woven or knitted fabric excellent in heat shielding and heat dissipation according to any one of claims 1 to 13, wherein the woven or knitted fabric has a UPF (ultraviolet ray protection coefficient) of 10 or more.   The woven or knitted fabric excellent in heat shielding and heat dissipation according to any one of claims 1 to 14, wherein an average infrared reflectance at a wavelength of 700 to 1400 nm is 62% or more. The woven or knitted fabric excellent in heat shielding and heat dissipation according to any one of claims 1 to 15, wherein the cooling sensation Q-max of the woven or knitted fabric is 0.2 J / cm ² · sec or more.   The woven fabric excellent in heat shielding and heat dissipation according to any one of claims 1 to 16, wherein the time to reach a diffusive residual moisture content of 5% or less is 100 minutes or less when 0.6 cc of water is dropped onto the woven or knitted fabric. knitting.   A textile product selected from the group consisting of clothing, artificial leather, footwear, heels, curtains, tents, sleeping bags, tarpaulins, and car seats, wherein the woven or knitted fabric according to any one of claims 1 to 17 is used. .

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