JP2018035459A - Fiber product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber product excellent in air permeability, having improved heat shielding properties (heat insulation properties) and image shielding properties.SOLUTION: A fiber product has a two-layer structure with two fabrics bound at a plurality of binding parts. Each of the fabrics includes a twist yarn-containing warp and a twist yarn-containing weft. The binding spaces at the binding parts in the warp direction and the weft direction are 3 mm or more, respectively.SELECTED DRAWING: None

Description

  The present invention relates to a textile product. More specifically, the present invention relates to a textile product that is excellent in air permeability and excellent in heat shielding properties (heat insulating effect) and image shielding properties.

  Conventionally, for example, a textile product such as a curtain is required to have an excellent image-shielding property (anti-permeability) so that the room is hardly visible from the outside. In addition, textile products are required to have heat shielding properties (heat insulation properties) that block heat from solar radiation and air permeability that sufficiently takes in air from outside. For example, Patent Document 1 proposes a knitted or knitted fabric having a multilayer structure of two or more layers, in which one of the layers includes flat cross-section fibers and the other layer includes false twisted crimped yarn. Has been.

Japanese Patent Laying-Open No. 2015-10282

  Although the woven or knitted fabric described in Patent Document 1 is relatively light, the image shielding property is not sufficient, and the air permeability is poor. In addition, when trying to improve any of these characteristics (for example, image-shielding properties), the woven or knitted fabric of Patent Document 1 has a significant decrease in the other characteristics (for example, air permeability), and cannot achieve both performances.

  This invention is made | formed in view of such a conventional problem, and it aims at providing the textiles which were excellent in air permeability and improved heat insulation (heat insulation effect) and image-shielding property. .

  The fiber product of the present invention that solves the above problems mainly includes the following configurations.

  (1) A fiber product having a two-layer structure in which two fabrics are connected by a plurality of connecting portions, each of the fabrics comprising warps including twisted yarns and wefts including twisted yarns, A textile product in which the binding interval of the binding portion is 3 mm or more in both the warp direction and the weft direction.

  According to such a configuration, any fabric contains twisted yarn. Therefore, these fabrics have relatively high rigidity even at low density, and are less likely to cause eye misalignment. These fabrics have a multilayer structure by connecting two fabrics. Furthermore, each connection part is adjusted so that a connection space | interval may be 3 mm or more. Since the connection distance is 3 mm or more, the two fabrics have a gap between the fabrics, the air passage resistance is reduced, and the air permeability is excellent. Moreover, since it becomes a multilayer structure, it is hard to permeate | transmit image heat-shielding property and the heat | fever by solar radiation, and heat insulation (heat insulation effect) is excellent.

  (2) The binding portion is a portion where the two fabrics are joined by binding the wefts or the warps constituting the two fabrics with normal binding or a binding-dedicated thread. (1) The textile product described.

  According to such a configuration, the binding portion is a normal binding, or a portion formed by a binding-only yarn of the same yarn as the warp or weft constituting the fabric or a binding-only yarn of another yarn It is. By using the connection-dedicated thread in this way, the connection interval of the connection portion is easily adjusted. Therefore, the fiber product is easily adjusted so that desired air permeability, image shielding property, and heat shielding property (heat insulation effect) can be obtained.

  (3) The textile product according to (1) or (2), wherein the twisted yarn includes at least one of false twisted fused yarn and medium strength twisted yarn.

  According to such a configuration, the warp and weft constituting the fabric include false twisted fused yarn and medium strength twisted yarn. By using these false twisted fused yarns and medium strong twisted yarns, the resulting fabric is likely to have high rigidity while having a lower density. Therefore, the fabric is less likely to cause misalignment and easily obtains desired air permeability.

  (4) The weft includes a first weft and a second weft different from the first weft, and the first weft and the second weft are regularly arranged alternately. Or the textiles according to any one of (1) to (3), which are arranged irregularly.

  According to such a configuration, different types of wefts can be arbitrarily arranged. Therefore, the obtained fiber product is easily adjusted so as to obtain desired air permeability, image shielding property and heat shielding property (heat insulation effect).

  (5) The textile product according to any one of (1) to (4), wherein the textile product is any one selected from the group consisting of clothing, curtains, industrial material fabrics, and sun hats.

  According to such a configuration, the textile product of the present invention can be suitably used for these uses that require air permeability, image shielding properties, and heat shielding properties (heat insulation effect).

  ADVANTAGE OF THE INVENTION According to this invention, the textiles which were excellent in air permeability and improved heat-insulating property (heat-insulating effect) and image-shielding property can be provided.

FIG. 1 is a fabric structure diagram in which no connecting portion is formed. FIG. 2 is a woven fabric structure diagram in the case of performing normal binding. FIG. 3 is a woven fabric structure diagram in the case of binding using a binding-only weft. FIG. 4 is a schematic cross-sectional view for explaining the arrangement of the first and second wefts in the textile product of one embodiment of the present invention. FIG. 5 is a schematic cross-sectional view for explaining the arrangement of the first and second wefts in the textile product of one embodiment of the present invention. FIG. 6 is a schematic cross-sectional view for explaining the arrangement of the first and second wefts in the textile product of one embodiment of the present invention. FIG. 7 is a schematic cross-sectional view for explaining the arrangement of the first and second wefts in the textile product of one embodiment of the present invention. FIG. 8 is a schematic cross-sectional view for explaining the arrangement of the first and second wefts in the textile product of one embodiment of the present invention. FIG. 9 is a schematic diagram of a test apparatus used in the heat insulation test.

<Textile products>
The textile product of one embodiment of the present invention is a textile product having a two-layer structure in which two fabrics are connected by a plurality of connecting portions. Each fabric is composed of warp yarns including twisted yarns and weft yarns including twisted yarns. The connecting intervals of the plurality of connecting portions are each 3 mm or more in the warp direction and the weft direction. Each will be described below.

  The fabric is a fabric constituting the textile product of the present embodiment. In this embodiment, at least two pieces of dough are partially connected by a connecting tissue. Hereinafter, for the sake of clarity of explanation, a case where two fabrics are joined to form a textile product will be exemplified.

  The two fabrics are made of a predetermined woven structure and constitute a textile product. The woven structure is not particularly limited. As an example, the woven structure is a double woven structure or a double woven structure containing untwisted middle core wefts. Among these, the double weave structure in which the center weft is inserted has an air layer between the two fabrics and does not intersect with the warp, so that the filament of the center weft spreads and is excellent in permeation resistance and heat insulation. In the present embodiment, the center weft is a weft that is not interlaced with the warp between the respective fabrics.

  Each of the fabrics may be bound normally or may be bound using a binding thread. In this embodiment, normal binding refers to a method of joining fabrics by binding warps (or wefts) constituting one fabric with wefts (or warp yarns) constituting the other fabric. On the other hand, binding using a binding-only yarn refers to a method of joining fabrics using a binding-only warp or a binding-only weft. Specifically, in the binding using the warp dedicated for binding, the fabrics are joined together by binding the wefts constituting each fabric. On the other hand, in the binding using the binding-only wefts, the fabrics are joined together by binding the warps constituting the respective fabrics. Among these, the connection interval of the connection portions can be easily adjusted by forming the connection portions with the dedicated connection yarns. Therefore, the fiber product is easily adjusted so that desired air permeability, image shielding property, and heat shielding property (heat insulation effect) can be obtained. Note that the normal binding and the binding using the binding thread may be used in combination.

  FIG. 1 is a fabric structure diagram (fabric structure diagram 10) in which no connecting portion is formed. FIG. 2 is a woven fabric structure diagram (fabric structure diagram 20) in the case of performing normal bonding in the textile product of the present embodiment. FIG. 3 is a fabric structure diagram (fabric structure diagram 30) in the case of performing binding using a connection-only weft. In FIGS. 1 to 3, a black square P1 represents a portion where the warp is above (floating), and a white square P2 represents a portion where the warp is below. The arrow A1 indicates the warp direction, and the arrow A2 indicates the weft direction. In FIG. 1, the center weft is used in the row indicated by the arrow A3. The core weft is not intermingled with any warp of the fabric.

  As can be seen from the comparison between FIG. 1 and FIG. 2, the connecting portion D <b> 1 is a portion that is on the upper side as a result of the warp yarns constituting the other fabric binding the weft yarns constituting one fabric. On the other hand, the connecting portion D2 is a portion that is lower as a result of the warp that constitutes one fabric being bound so as to dive the weft constituting the other fabric. Further, as can be seen from the comparison between FIG. 1 and FIG. 3, the connecting portion D3 is a portion that is on the upper side as a result of the binding-only wefts binding the warps constituting one of the fabrics. On the other hand, the connecting portion D4 is a portion that is underneath as a result of the binding-only wefts being bound so as to dive the warp forming the other fabric.

  In the fiber product of the present embodiment, the interval between the connecting portions may be 3 mm or more in the warp direction and the weft direction, and is preferably 7 mm or more. In addition, the upper limit of the space | interval of a connection part can be suitably adjusted with the air permeability and heat insulation effect desired. As an example, the upper limit of the interval between the connecting portions is preferably 3 cm or less, and more preferably 2 cm or less. If the interval between the connecting portions is 3 mm or more, an air layer is likely to be formed between the two doughs connected. As a result, the fiber product is kept breathable, hardly transmits heat, and has an excellent heat insulating effect.

  The position (array) where the plurality of connecting portions are formed is not particularly limited. For example, the connecting portions may be regularly arranged or irregularly arranged. When regularly arranged, the connecting portions may be formed at equal intervals in the warp direction and the weft direction, or may be formed at equal intervals only in either direction. It may be formed in a predetermined lattice shape such as a shape, or may be arranged in accordance with any other rule. Among these, the connecting portion is preferably arranged so as to be regular in the warp direction or the weft direction from the viewpoint of maintaining uniform performance. In the present embodiment, the “irregular arrangement” refers to an arrangement having no regularity or periodicity other than the “regular arrangement”.

  Returning to the description of the fabric, the warp and the weft constituting the fabric of the present embodiment may be composed of a filament yarn or a spun yarn. The filament yarn includes various twisted yarns (for example, false twisted fused yarn described later) and drawn yarns. The spun yarn includes various chemical fibers and natural fibers (such as cotton).

  The material of the warp and the weft is not particularly limited. For example, the warp and weft materials are polyester, nylon, polyester cotton blended yarn, cotton, and the like. Among these, when the textile product is a curtain, the material is preferably polyester from the viewpoint of hardly causing yellowing due to sunlight or the like. These materials include heat stabilizers, antioxidants, light stabilizers, smoothing agents, antistatic agents, plasticizers, thickeners, pigments to improve productivity and properties in the spinning and processing processes. Additives such as flame retardants may be blended.

  The total fineness of the warp and the weft is preferably 56 dtex or more, and more preferably 84 dtex or more. Further, the total fineness is preferably 330 dtex or less, and more preferably 167 dtex or less. When the total fineness is within the above range, the resulting fabric is suitable for use in clothing, curtains, etc. in terms of basis weight, thickness, and the like. The total fineness can be calculated according to JIS L1013 (1999) 8.3.1 Positive Fineness b) B Method. Specifically, the mass of the sample sampled by applying an initial load of 0.882 mN / dtex was measured when it was completely dried, and the value was multiplied by the official moisture content specified in JIS L 0105 3.1. (Polyamide is 4.5% and polypropylene is 0% as the process moisture content, respectively).

  The single fiber fineness of the warp and the weft is preferably 0.78 dtex or more, and more preferably 1.16 dtex or more. The single fiber fineness is preferably 3.48 dtex or less, and more preferably 2.31 dtex or less. When the single fiber fineness is within the above range, the hardness (texture) of the resulting fabric is preferably a hardness (texture) suitable for clothing and curtains. The single fiber fineness can be calculated by dividing the total fineness by the number of filaments. The number of filaments can be calculated based on the method of JIS L1013 (1999) 8.4.

As shown below, the cover factor (total cover factor K) of the textile product of the present embodiment is the case where the cover factor K1 of one fabric, the cover factor K2 of the other fabric, and the binding exclusive thread are used. Can be calculated based on the cover factor K0 of the binding-only yarn (only when the binding-only yarn is used).
K = K1 + K2 + K0
These K1, K2 and K0 are calculated from the following equations.
K1 = Nw1 × √W1 + Nf1 × √F1
(Where Nw1 is the warp density (one / inch) of one fabric, Nf1 is the weft density (one / inch) of one fabric, and W1 is the weighted average warp fineness (dtex) of one fabric. Yes, F1 is the weighted average weft fineness (dtex) of one fabric.
K2 = Nw2 × √W2 + Nf2 × √F2
(Where Nw2 is the warp density (lines / inch) of the other fabric, Nf2 is the weft density (lines / inch) of the other fabric, and W2 is the weighted average warp fineness (dtex) of the other fabric. Yes, F2 is the weighted average weft fineness (dtex) of the other fabric.)
K0 = Nw0 × √W0 + Nf0 × √F0
(In the formula, Nw0 is the warp density (w / inch) of the binding thread, Nf0 is the weft density (w / inch) of the binding thread, and W0 is the warp fineness (dtex) of the binding thread. F0 is the weft fineness (dtex) of the binding thread.

  The total cover factor is preferably 2500 or more, and more preferably 2700 or more. Further, the total cover factor is preferably 3200 or less, and more preferably 3000 or less. When the total cover factor is within the above range, the resulting fabric has a low density and is easily excellent in air permeability.

  Moreover, it is preferable that the cover factor of each fabric (and the cover factor of the binding yarn) is adjusted so that the textile product of the present embodiment has the above total cover factor. As an example, the cover factor K1 of one fabric is preferably 1250 or more, and more preferably 1350 or more. Further, the cover factor of one fabric is preferably 1600 or less, and more preferably 1500 or less. When the cover factor of one fabric is within the above range, the density is low and air permeability is easily obtained.

  The cover factor K2 of the other fabric is preferably 1250 or more, and more preferably 1350 or more. Further, the cover factor of the other fabric is preferably 1600 or less, and more preferably 1500 or less. When the cover factor of the other fabric is within the above range, the resulting fabric has a low density and air permeability is easily obtained.

  The cover factor K0 of the binding thread is preferably 10 or more, and more preferably 30 or more. Further, the cover factor K0 of the binding thread is preferably 500 or less, and more preferably 430 or less. When the cover factor K0 of the binding yarn is within the above range, not only the function of connecting the two fabrics, but also the gap between the two fabrics can be increased, and the binding yarn is not crossed with the warp yarn. The effect of improving the air permeability, image-shielding property, and heat-shielding property is easily obtained.

  In the textile product of the present embodiment, the cover factor K1 of one fabric and the cover factor K2 of the other fabric may be the same or different. For example, in one fabric, parts with low cover factor with low density and excellent air permeability and parts with large cover factor with high image shielding and heat shielding properties are alternately arranged, and the other fabric is also in the same arrangement, If the connection interval is 3 mm or more so as to shift the two pieces of fabric, the fabric becomes a two-layer structure with voids, and a fabric with excellent breathability, image shielding properties, and heat insulation properties (heat insulation) can be obtained. obtain.

  The cross-sectional shapes of the warp and the weft are not particularly limited. As an example, the cross-sectional shapes of the warp and the weft may be a round cross section or various atypical cross sections. Examples of the irregular cross section include a flat type, a triangular type, a C type, a Y type, a dumpling type, and a hollow type.

  Both the warp and the weft constituting the fabric of this embodiment include a twisted yarn. By using warps and wefts including twisted yarns as described above, the obtained fabric has relatively high rigidity even at a low density, and hardly causes misalignment. And since these textiles can be comprised by low density, the textiles obtained are excellent in air permeability.

  The kind of twisted yarn is not particularly limited. For example, the twisted yarn is preferably a false twisted fused yarn, a medium strong twisted yarn or the like from the viewpoint of preventing misalignment of the fabric. The false twisted yarn is a yarn that is untwisted by applying twist in the opposite direction to the yarn that has been twisted while applying heat. In the false twist fusion yarn, untwisted portions having a twist fused in the false twist direction and untwisted portions having a twist opposite to the false twist direction are alternately arranged along the yarn direction. It is a thread. A medium strong twisted yarn means a twisted yarn having a medium to strong twist. For example, a twist of 300 to 2500 T / m is added to such a medium strong twist yarn (T is the number of twists). When the number of twists is 300 to 2500 T / m, the resulting fabric is easily kept high in rigidity even when woven at a low density.

  In particular, the warp constituting the fabric of the present embodiment preferably contains 50% or more of twisted yarn, more preferably contains 95% or more of twisted yarn, and more preferably comprises all of twisted yarn. It is particularly preferred that all are composed of twisted yarns or false twisted fused yarns.

  On the other hand, the weft constituting the fabric of the present embodiment preferably contains 50% or more of twisted yarn, and more preferably contains 70% or more. The weft yarn may include the above-described drawn yarn and spun yarn in addition to the twisted yarn. Further, the weft may include a processed yarn that has been subjected to a desired processing in order to further improve the image-shielding property, heat-shielding property, and the like. Examples of such processed yarns include bright yarns, semi-dal yarns, full-dal yarns, yarns that are not twisted and have low convergence, and yarns that have a high fineness. Bright yarn, semi-dal yarn, and full yarn are all processed yarns that are given light reflectivity and matting effect by blending a predetermined amount of oxidized inorganic fine particles (for example, titanium oxide). For example, the bright yarn is a processed yarn that has less than 0.1% by mass of oxidized inorganic fine particles and has improved light reflectivity. Further, the semi-dull yarn and the full dull yarn are processed yarns in which the light impermeability is enhanced by blending about 0.1 to 0.5% by mass and 1.5 to 5% by mass of inorganic oxide fine particles, respectively. . These processed yarns are appropriately selected and used in combination based on desired image shielding properties, heat shielding properties, and the like.

  Thus, when a plurality of types of yarns are used as the wefts, the ratio, arrangement, etc. of the respective wefts are not particularly limited. For example, when two types of wefts (first weft and second weft) are used as the wefts, the ratio of these first and second wefts may be 1: 1000 to 1000: 1. It is preferably 1: 300 to 300: 1, more preferably 1: 100 to 100: 1. These ratios are appropriately selected and used in combination based on the desired image shielding properties and the like.

  Further, the arrangement of the first weft and the second weft may be alternately arranged regularly or irregularly. 4 to 8 are schematic cross-sectional views for explaining the arrangement of the first and second wefts. 4 to 8, L1 represents one fabric, and L2 represents the other fabric. Arrow A4 represents the warp direction. 4 to 8, the connecting portion is omitted.

  The fiber product shown in FIG. 4 is an example in which the first weft Y1 indicated by a black circle and the second weft Y2 indicated by a white circle are alternately arranged to be 1: 1. In this case, the weft constituting the fabric L1 consists only of the first weft Y1, and the weft constituting the fabric Y2 consists only of the second weft Y2.

  The fiber product shown in FIG. 5 is an example in which the first weft Y1 indicated by a black circle and the second weft Y2 indicated by a white circle are alternately arranged so as to be 2: 2. In this case, the first weft Y1 and the second weft Y2 are alternately used as the weft constituting the fabric L1, and the weft constituting the fabric L2 is also the first weft Y1 and the second weft Y2. Are used alternately. However, as shown in FIG. 5, in the direction orthogonal to the warp direction A4 (the thickness direction of the textile product), the wefts constituting the fabric L1 are arranged so that the first weft Y1 and the second weft Y2 overlap. Is done.

  The fiber product shown in FIG. 6 is obtained by alternately arranging the first weft Y1 indicated by a black circle and the second weft Y2 indicated by a white circle so as to be 2: 1. It is an example in which the arrangement is repeated so that the number is 1, and such an arrangement is repeated. In this case, the weft constituting the fabric L1 is used so that the first weft Y1 and the second weft Y2 are 4: 1, and the weft constituting the fabric L2 is also the first weft Y1 and the second weft. The weft Y2 is used so as to be 4: 1.

  The fiber product shown in FIG. 7 is obtained by alternately arranging the first weft Y1 indicated by a black circle and the second weft Y2 indicated by a white circle twice so as to be 1: 1. Only the first weft Y1 is used eight times, and then the first weft Y1 and the second weft Y2 are alternately arranged four times so as to be 1: 1, and then only the first weft Y1 is This is an example in which such an arrangement was repeated 8 times. In this case, in the weft constituting the fabric L1, the first weft Y1 is continuously arranged several times in the warp direction, and then the second weft Y2 is arranged four times. In the direction orthogonal to the warp direction A4, the wefts constituting the fabric L1 and the fabric L2 are such that the portion where the first weft Y1 and the second weft Y2 overlap with each other and the first weft Y1 are The part arrange | positioned so that it may overlap is formed.

  The fiber product shown in FIG. 8 is obtained by arranging the first weft Y1 indicated by a black circle and the second weft Y2 indicated by a white circle four times so as to be 1: 1, This is an example in which the second weft Y2 indicated by 4 and the first weft Y1 indicated by a black circle are arranged four times so as to be 1: 1, and such an arrangement is repeated. In this case, in the weft constituting the fabric L1, the first weft Y1 is arranged four times and then the second weft Y2 is arranged four times in the warp direction. In the direction perpendicular to the warp direction A4 (the thickness direction of the textile product), the wefts constituting the fabric L1 and the fabric L2 are arranged so that the first weft Y1 and the second weft Y2 overlap.

  In addition, all of the arrangement | sequence shown by these FIGS. 4-8 are illustrations, and can be suitably changed based on the desired image-shielding property and heat-shielding property (thermal insulation effect etc.). In the fiber product of this embodiment, it is preferable that the weft yarns are arranged alternately or side by side from the viewpoint of easily obtaining excellent image shielding properties and heat shielding properties (heat insulation effect). As a result, there are an array part with high air permeability and an array part with high image-shielding and heat-shielding properties, and both effects are easily obtained.

  The method for producing the dough is not particularly limited. As an example, the fabric is first warped and installed in a loom. Similarly, wefts are installed on the loom. The loom is not particularly limited. Examples of the loom include a water jet room, an air jet room, and a rapier room. Among these, the loom is preferably a water jet loom or an air jet loom because high-speed weaving is relatively easy and productivity is easily improved.

  As mentioned above, according to the textiles of this embodiment, all the cloths contain twisted yarn. Therefore, these fabrics have relatively high rigidity even at low density, and are less likely to cause eye misalignment. These fabrics have a multilayer structure by connecting two fabrics. Furthermore, each connection part is adjusted so that a connection space | interval may be 3 mm or more. Since the connection distance is 3 mm or more, the two fabrics have a gap between the fabrics, the air passage resistance is reduced, and the air permeability is excellent. Moreover, since it becomes a multilayer structure, it is hard to permeate | transmit image heat-shielding property and the heat | fever by solar radiation, and heat insulation (heat insulation effect) is excellent.

More specifically, the fiber product of this embodiment has an air permeability of 120 (cc / cm ² / sec) measured by a method defined in JIS-L1096: 2010 air permeability A method (fragile type method). Above, preferably 250 (cc / cm ² / sec) or more.

  Further, the fiber product of the present embodiment has a heat insulation property measured by a heat insulation test infrared lamp (60 ° C. method) described later in the examples of 25% or more, and preferably 30% or more.

  Furthermore, the fiber product of the present embodiment has an image shielding property measured by an image shielding test (QTEC method), which will be described later in the examples, of 4th day or higher and 3rd night or higher. Grade 5 or higher, night grade 3.5 or higher.

  Since the textile product of this embodiment has these excellent performances, it can be suitably used for various applications that require image-blocking properties, heat insulation effects, and air permeability. Such applications include apparel (shirts, uniforms, sports, etc.), curtains, textiles for industrial materials (for tents, textile parts that replace air-permeable, image-shielding, and heat-insulating windows), and Examples include sun hats.

  Hereinafter, the present invention will be described more specifically with reference to examples. The present invention is not limited to these examples.

The measuring method of each characteristic value is shown below.
(Total fineness)
The total fineness is measured according to JIS L1013 (1999) 8.3.1 Positive Fineness b) Mass of the sample sampled by applying an initial load of 0.882 mN / dtex according to the B method, A value obtained by multiplying the official moisture content defined in JIS L 0105 3.1 was used (4.5% for polyamide, and 0% for polypropylene, respectively).

(Single fiber fineness)
The single fiber fineness was calculated by dividing the total fineness by the number of filaments.

(Number of filaments)
The number of filaments was calculated based on the method of JIS L1013 (1999) 8.4.

(Weight)
The basis weight was measured according to JIS L1096-1999.

(Breathable)
The amount of air passing through the test piece (cc / cm ² / sec) was determined using a Frazier type tester by the method defined in JIS-L1096: 2010 air permeability A method (Fragile type method).

(Insulation test method (infrared lamp 60 ° C method)
FIG. 9 is a schematic diagram of a test apparatus used in the heat insulation test. As shown in FIG. 9, a rectangular box (vertical × horizontal × height = 54 cm × 54 cm × 45 cm) sealed box in which a rectangular (left / right × upper / lower = 50 cm × 40 cm) glass plate G is fitted to the front wall surface. A test device E was formed. A test piece S (textile product) of about 50 cm × 40 cm was suspended behind the glass plate G of the test apparatus E, and an infrared lamp L was installed at a position about 50 cm away from the glass plate G. Further, the black panel B is erected in parallel with the plate surface of the glass plate G at a position 8 cm behind the surface of the suspended test piece S, and the temperature is set at a position 4 cm ahead of the wall surface on the opposite side of the glass plate G. Sensor D was installed. The infrared lamp L was irradiated for 60 minutes, and the temperature of the black panel B and the temperature in the test tank (temperature of the temperature sensor D) were measured every predetermined time (5 minutes). Moreover, the infrared lamp L was irradiated for 60 minutes in the state which did not hang the test piece S, and the temperature of the black panel B and the temperature (temperature of the temperature sensor D) in a test tank were measured for every predetermined time ( Blank test). The measurement conditions were set as follows.
Environmental temperature: 25.0 ± 1.0 ° C
Initial temperature: 25.0 ± 0.5 ° C for both black panel and test chamber
Effective blank test condition: Black panel maximum rising temperature 37.0 ± 0.5 ℃
Maximum rising temperature in the test chamber: 24.0 ± 0.5 ° C
Based on the measurement results of the temperature of the black panel B and the temperature in the test tank (the temperature of the temperature sensor D), the heat insulation effect (° C.) and the heat insulation effect rate (%) were calculated using the following equations.
Thermal insulation effect (° C) = Maximum rise temperature in blank test (° C)-Maximum rise temperature in specimen suspension test (° C)
Thermal insulation effect rate (%) = (maximum rising temperature of blank test−maximum rising temperature of test piece suspension test) / maximum rising temperature of blank test × 100

(Imaging test method (QTEC method)
Prepare two rooms with a window in between, and install furniture in one room for the indoor side and the other room for the outdoor side. A sample (textile product) is affixed to the window frame. Under the following test conditions, the camera is photographed from the outdoor side to the indoor side, and the resulting image is illuminated against a dedicated scale to make it difficult to see indoors. evaluated. The dedicated scale is a scale in which the difficulty of seeing indoors is divided into 1 to 5 grades in 0.5 increments, and the 5th grade is the least visible. In general, 1st grade means everything is visible, 2nd grade means easy to see, 3rd grade means nothing, 4th grade means difficult to see, 5th grade is invisible Refers to that. Therefore, it can be said that the third and higher grades have excellent image-shielding properties, and the fourth to fifth grades have extremely excellent image-shielding properties.
(Test conditions)
Day test Outdoor side: Illuminated (about 1600 lux) Indoor side: Illuminated (about 500 lux)
Night test Outdoor side: Illuminated (about 500 lux) Indoor side: Illuminated (about 500 lux)

<Example 1>
As the warp yarn, a false twisted fusion yarn having a circular cross-sectional shape, a single fiber fineness of 1.39 dtex, a filament count of 72, and a total fineness of 100 dtex was prepared. The weft yarn is made of polyester, has a circular cross-sectional shape, has a single fiber fineness of 1.39 dtex, has 72 filaments, has a total fineness of 100 dtex, false twisted fused yarn, polyester A full-filar false twisted weft having a circular cross-sectional shape, a single fiber fineness of 1.16 dtex, a filament count of 144, a total fineness of 167 dtex, and a twist count of 0 T / m; We prepared a weft for exclusive use of the same full dull yarn. Using these warps and wefts, a double woven fabric (fabric) having a plain structure was woven in an air jet loom with a finished warp density of 181 yarns / inch and a finished weft density of 111 yarns / inch. Further, the obtained fabric was connected with a dedicated weft so as to have a connection interval of 8 mm in the warp direction and a connection interval of 10 mm in the weft direction to produce a textile product. Of the obtained fabrics, the cover factor of one fabric is 1476, the cover factor of the other fabric is 1476, and the cover factor of the binding thread is 33, and the total cover factor calculated from these is Was 2985.

<Comparative Example 1>
As a warp, a false twisted fusion yarn was prepared which was made of polyester, had a circular cross-sectional shape, had a single fiber fineness of 2.33 dtex, had 36 filaments, and had a total fineness of 84 dtex. As the weft, a bright yarn having a flat cross-sectional shape, a single fiber fineness of 3.0 dtex, a filament count of 30, and a total fineness of 90 dtex was prepared. Using these warps and wefts, a plain weave (fabric) was woven in a water jet loom with a finished warp density of 96 / inch and a finished weft density of 88 / inch. The cover factor of the obtained dough was 1715.

<Comparative example 2>
The front yarn is made of polyester, has a circular cross-sectional shape, has a single fiber fineness of 2.33 dtex, has 36 filaments, has a total fineness of 84 dtex, and has a twist count of 0 T / m I prepared the thread. A bright yarn having a circular cross-sectional shape, a single fiber fineness of 2.33 dtex, a filament count of 36, a total fineness of 84 dtex, and a twist count of 0 T / m is used as the back yarn. Got ready. Further, as a calami yarn, a bright yarn having a circular cross-sectional shape, a single fiber fineness of 2.33 dtex, a filament count of 72, a total fineness of 167 dtex, and a twist count of 0 T / m. Got ready. Further, as a warp insertion yarn, a flurdal yarn having a circular cross-sectional shape, a single fiber fineness of 1.16 dtex, a filament count of 144, a total fineness of 167 dtex, and a twist count of 0 T / m And a semi-dial yarn having a circular cross-sectional shape, a single fiber fineness of 1.16 dtex, a filament count of 144, a total fineness of 167 dtex, and a twist count of 0 T / m I prepared the thread. Using these, a warp knitted fabric was produced by a Russell machine.

  About each textile product obtained in Example 1 and Comparative Examples 1-2, air permeability, heat insulation, and image-shielding property were evaluated by the said evaluation method. The results are shown in Table 1.

  As shown in Table 1, the fiber product of Example 1 exhibited excellent air permeability although the basis weight was the same as that of the fiber product of Comparative Example 2. Moreover, the textile product of Example 1 showed the heat insulation and image-shielding property comparable as the textile product of Comparative Example 2. In addition, in the fiber product of Comparative Example 1 in which bright yarn was used as the weft in order to improve the image shielding property, the air permeability and the heat insulating property other than the image shielding property were greatly reduced. As described above, the fiber product of Example 1 can be achieved without increasing the basis weight in order to realize excellent heat insulation and image shielding properties, and the air permeability is higher than those of the conventional Comparative Example 1 and Comparative Example 2. It was possible to improve significantly.

10, 20, 30 Textile structure diagram A1, A4 Warp direction A2 Weft direction A3 Rows using medium weft B Black panel D Temperature sensor D1, D2, D3, D4 Joint E Test equipment G Glass plate L Infrared Lamp L1 One fabric L2 The other fabric P1 The portion where the warp is on the top P2 The portion where the warp is on the bottom S Test piece Y1 First weft Y2 Second weft

Claims (5)

It is a textile product with a two-layer structure in which two pieces of fabric are connected by a plurality of connecting parts,
Each of the fabrics comprises warps including twisted yarns and wefts including twisted yarns,
The textile product in which the connection intervals of the plurality of connection parts are each 3 mm or more in the warp direction and the weft direction.   The binding portion is a portion where the two fabrics are joined together by binding the wefts or the warps constituting the two fabrics with a normal binding or a binding-dedicated thread. The textile product according to 1.   The textile product according to claim 1 or 2, wherein the twisted yarn includes at least one of false twisted fused yarn and medium strength twisted yarn. The weft includes a first weft and a second weft different from the first weft,
The textile product according to any one of claims 1 to 3, wherein the first weft yarn and the second weft yarn are regularly arranged alternately or irregularly.   The textile product according to any one of claims 1 to 4, wherein the textile product is any one selected from the group consisting of clothing, curtains, materials, and sun hats.

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