JPH09273045A - Cloth having multiple layered structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a cloth having a multiple layered structure comprising more than two layers composed of surface layers and at least one layer other than the surface layers, and having properties capable of preventing discoloring by water. SOLUTION: This cloth has at least one layer composed of yarns containing >=50wt.% of regenerated cellulose fibers containing 1-5wt.% of white pigment among layers 2, 5, 3 and 6 other than surface layers 1 and 4, and the surface layers 1 and 4 are composed of yarns other than the regenerated cellulose fiber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cloth having a performance of preventing discoloration due to water, which is suitably used not only for clothing such as blouses, sports shirts, pants and long pants but also for daily goods. .

[0002]

2. Description of the Related Art When getting wet in the rain or sweating,
The discoloration may occur only on wet parts of the clothing such as the shoulders, sides and back, and more specifically, the color may become deeper and cause discomfort. Also, when the hem of the pants or long pants is discolored due to the splash of water in the puddle, etc., the appearance is extremely uncomfortable.

[0003] As a fiber which is hard to be transparent even when wet, a fabric using a core-sheath type composite fiber containing a large amount of a white pigment in a core is known (Japanese Patent Application Laid-Open No. 5-93343). However, these are to increase the light reflection of the core portion by the white pigment, and to reduce the contribution of the decrease in the proportion of white light caused by the decrease in the refractive index of the fiber surface due to water, so that it is difficult to see through even when wet. Although it has the effect of, the drawback that it discolors when it gets wet remains. Therefore, a fabric having a performance of preventing discoloration due to water has not been known so far.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cloth having a property of preventing discoloration by water without deteriorating the color developability.

[0005]

Before explaining the constitution of the present invention, first, the reason why the fiber is discolored when wet with water will be described. When a human looks at an object, his eyes capture light that is a combination of the surface reflected light reflected on the surface of the object and the internally reflected light that enters the object and is reflected at an internal boundary surface. The surface reflected light is white light containing light of all the same wavelengths as the incident light, and the internally reflected light is colored light that has been absorbed by a dye at a specific wavelength. Here, it is known that the larger the proportion of the white light, the more whitish, and the smaller the proportion of the white light, the deeper the color. Water has a lower refractive index (n = 1.33) than fiber, but when the fiber gets wet with water, the fiber surface is covered with water to lower the refractive index and lower the surface reflectance. Therefore, when wet with water, discoloration, that is, deepening occurs.

As a result of diligent studies, the present inventors have found that a fabric having a multi-layer structure in which artificial cellulose fibers containing a white pigment are used in at least one layer other than the surface layer has sufficient discoloration preventive property, and thus the present invention is realized. Arrived

A cloth having a multilayer structure of two or more layers consisting of a surface layer and at least one layer other than the surface layer according to the present invention,
At least one layer other than the surface layer is composed of a yarn containing at least 50% by weight of artificial cellulose fiber having a white pigment content of 1% by weight or more and 5% by weight or less, and the surface layer is a fiber other than the cellulose fiber. That is, it is characterized in that it is composed of a thread composed of fibers other than artificial cellulose fibers having a white pigment content of 1% by weight or more and 5% by weight or less. Here, the surface layer means a surface used as a front surface when worn, and the back layer means a surface close to the skin when worn. The mixing ratio of the other fibers mixed in the yarn containing the artificial cellulose fibers used in the layers other than the surface layer is preferably 50% or less, more preferably 30% or less, and the artificial cellulose fibers are included. Various composite yarns can be used. The fabric having a multilayer structure of the present invention may be composed of two or more layers. A fabric having three layers of a front layer, an intermediate layer and a back surface is usefully used. The yarn forming the surface layer is preferably a synthetic fiber, and the surface layer may be formed of a composite yarn composed of the above-mentioned yarn forming fiber and other fibers. However, in this case, the mixing ratio of other fibers is 50% or less, preferably 30% or less.

The following three points can be mentioned as the reasons for using the artificial cellulose fiber in the layers other than the surface layer. (1) Artificial cellulose fibers have excellent water absorption. Therefore, if at least one layer composed of fibers having such water absorbability is placed directly under the surface layer or through another layer, the water infiltrated into the surface layer is immediately absorbed, and the fibers of the surface layer are absorbed by the water. It can prevent discoloration. (2) In the case of a fabric having a multilayer structure, particularly a knitted fabric, the surface of the fabric may not be completely covered with the surface layer. In this case, if the layer disposed below the surface layer is composed of artificial cellulose fibers having a white pigment content of 1% by weight or more and 5% by weight or less, the lower layer is hardly discolored by water. Therefore, even if the surface layer having a structure with low coverage is used, the cloth itself does not appear to be discolored. (3) The fibers constituting the surface layer can be selected without considering discoloration due to water. Therefore, it is not necessary to add a large amount of white pigment to the fibers constituting the surface layer,
As a result, a fabric having excellent color developability can be obtained.

The artificial cellulose fibers used in at least one layer other than the surface layer of the fabric of the present invention are fibers basically composed of β-glucose, such as artificially produced regenerated cellulose and semisynthetic cellulose. The hydroxyl group of the cellulose molecule may be substituted with another substituent such as acetylation. Specific examples of these artificial cellulose fibers include cupra, acetate, rayon, and polynosic. The yarn composed of the artificial cellulose fiber may be a multifilament or a spun yarn composed of short fibers. The thread thickness used in the present invention is 30 in the case of multifilament.
d to 150d, 10s to 40s for spun yarn (cotton count)
Is preferably used. However, it is not limited to a thread having this thickness. At that time, the single yarn denier of the filaments constituting the multifilament and the fiber length of the short fibers may be arbitrarily selected as required.

As described above, other fibers may be mixed with the artificial cellulose fibers. As a form of mixing, mixing in the state of yarn, that is, mixing with use in composite yarn and knitting may be used. Composite yarns can be mixed with air such as interlace and taslan, false twist after air mix, interlace after false twist, complex in twisting process, fiber complex in spinning process, and spinning process. It is obtained by a method such as the combination of the fiber and the yarn. In this case, the mixing ratio of other fibers is 50% by weight or less, preferably 30% by weight or less.

[0011] The other fibers mixed with the artificial cellulose fibers may not contain a white pigment. However, other fibers contain 0.3% by weight or more and 5% by weight or less of white pigment,
More preferably, it is contained in an amount of 0.3% by weight or more and 3% by weight or less. Particularly preferred is a core-sheath type composite fiber obtained by melt spinning containing 3 to 15% by weight of a white pigment in the core.

When at least one layer other than the above-mentioned surface layer is composed of artificial cellulose fibers having a white pigment content of 1% by weight or more and 5% by weight or less, when mixed with other fibers having water diffusibility. preferable. Although the object of the present invention can be achieved by using a yarn composed of only artificial cellulose fiber, the artificial cellulose fiber has poor water diffusibility even though it has excellent water absorbability. This is because the processing mechanism is limited. Therefore, by mixing fibers with water diffusibility and providing physical water passages in the yarn or layer by capillary action, water will diffuse from the point given to other areas, As a result, when the same amount of water adheres, a more excellent discoloration prevention effect is obtained, and on the other hand, even when a large amount of water adheres, the discoloration prevention can be achieved. That is, the yarn made of the artificial cellulose fiber retains water, and the fiber having water diffusibility diffuses the water, thereby exerting the effect of preventing discoloration. Further, by diffusing water, the feeling of stickiness of the fabric can be eliminated, and wearing comfort can be improved.

As a yarn composed of fibers having water diffusibility,
For example, a filament raw yarn having a modified cross-sectional shape such as L, C, W, Z, M, and a gear shape, and a filament-processed yarn thereof,
The filament raw yarn of porous fiber (porosity 5% to 40%) and its filament processed yarn or single yarn denier is 1.
It is preferable to use a fine denier raw yarn of 5 d or less and its filament processed yarn. In order to increase the water passage and increase the diffusivity, it is preferable to make the cross-sectional shape W or a deformed cross-section of a gear shape or a hollow fiber, and further make the fine denier of the single yarn denier 1.5 d or less to increase the surface area of the fiber. The degree of irregularity of the fibers in the present invention is preferably 1.2 or more and 2.2 or less, more preferably 1.4 or more and 2.2 or less.
When the ratio is 1.2 or more, the water diffusibility is far superior to that of the round cross section. When the ratio exceeds 2.2, the production stability such as spinnability is poor, which is not preferable. The degree of irregularity is calculated by calculating the cross-sectional area and peripheral length (circumferential length) of the irregular-shaped yarn, then finding the radius of a perfect circle with the same cross-sectional area, and calculating the perimeter of that perfect circle from Ask by. Deformation degree = circumferential length of deformed yarn / circular length of perfect circle having the same cross-sectional area as the deformed yarn When a raw yarn of synthetic fiber is subjected to filament processing and crimped, water diffusibility can be imparted. However, the crimp in this case is low crimp, that is, 10% or less, preferably 5 to 7% in crimp elongation. This is because a high crimp increases the space for physically retaining water, but conversely significantly reduces the diffusivity of water, which has a negative effect on preventing discoloration of the fabric.

As described above, the fabric of the present invention may be composed of two or more layers. In a two-layer structure fabric composed of a front layer and a back layer, the back layer has a white pigment content of 1% by weight or more and 5 or more.
At least 50% by weight of artificial cellulose fiber of not more than 50% by weight
The surface layer may be formed of a thread other than the artificial cellulose fiber. As an example of a fabric having a two-layer structure that is more preferable in terms of discoloration prevention, a synthetic fiber yarn or a core portion of which a back layer is composed of a yarn composed of 100% of the artificial cellulose fiber and a surface layer of which contains 1 to 6% by weight of a white pigment. A fabric composed of a core-sheath type composite synthetic fiber yarn containing 3 to 15% by weight of a white pigment can be mentioned.

In a fabric having a three-layer structure consisting of a surface layer, an intermediate layer and a back layer, a yarn containing at least 50% by weight of the artificial cellulose fiber may be used in either or both of the intermediate layer and the back layer. Good. When the yarn containing the artificial cellulose fiber is used for either one of the intermediate layer and the back layer, the yarn used for the other layer is not particularly limited, and any yarn can be used. However, as described above, from the viewpoint of water diffusion and discoloration prevention, a yarn made of a fiber having water absorbability and water diffusibility as a yarn constituting another layer, a synthetic fiber yarn containing 1 to 6% by weight of a white pigment, And its core is 3 to 15% by weight
It is preferable to use any one of the core-sheath type composite synthetic fiber yarns containing the white pigment or the combination thereof. As an example of a more preferable two-layer structure in terms of anti-discoloration property, the surface layer contains 1 to 1 of white pigment.
Synthetic fiber yarn containing 6% by weight and / or its core is 3 to
Mention may be made of core-sheath type composite fibers containing 15% by weight of white pigment, and cloth using a yarn comprising the artificial cellulose for the back layer. Also, as an example of a fabric with a three-layer structure,
A synthetic fiber yarn containing a white pigment in an amount of 1 to 6% by weight or a core-sheath type composite synthetic fiber yarn containing a white pigment in an amount of 3 to 15% by weight in its core is used as a surface layer, and the artificial cellulose is used in an intermediate layer and a back layer. There may be mentioned fabrics using yarns comprising fibers.

In a fabric having a multilayer structure of four or more layers consisting of a surface layer, two or more intermediate layers and a back layer, a yarn containing the artificial cellulose fiber may be used in any one or a plurality of intermediate layers. In this case, the threads of the other layers can be selected according to the case of the fabric having the three-layer structure.

The white pigment mixed in the artificial cellulose fiber in the present invention can impart sufficient opacity to the fiber, does not significantly reduce the color developability even when dyed other than white, and hinders the production of the raw yarn. The type is not particularly limited as long as it does not exceed, but metal oxides such as titanium oxide, zinc oxide, magnesium oxide and calcium carbonate are preferable. Considering the cost, titanium oxide is most suitable.
The content of this white pigment is 1 in the case of artificial cellulose fiber.
It is important to set the content to 5% by weight or more and 5% by weight or less, preferably 1% by weight or more and 3% by weight or less. If the content of the white pigment exceeds 5% by weight, the strength and elongation of the yarn is remarkably reduced, which makes it difficult to produce the yarn and to pass through the weaving and weaving process, and wears the guides and causes defects such as fluff and streaks. Absent. 1% by weight
If the amount is less than the above range, the discoloration preventing effect intended by the present invention cannot be obtained.

In the present invention, it is important that the content of the white pigment mixed in the synthetic fiber is 1 to 6% by weight.
On the other hand, in the case of the core-sheath type composite synthetic fiber, it is important that the content is 3% by weight or more and 15% by weight or less, and preferably 5% by weight or more and 10% by weight or less. This is because when the content of the white pigment in the core exceeds 10% by weight, the strength begins to decrease gradually, and when it exceeds 15% by weight, the strength and elongation decrease remarkably. If the amount is less than 3% by weight, the discoloration preventing effect of the present invention cannot be obtained.
The core and the sheath may or may not have the same base polymer. For example, in the case of a polyester core-sheath type composite fiber, only the sheath portion may be a cationic dyeable polymer. In the case of a core-sheath type composite fiber of polyamide, the core may be nylon 66 and the sheath may be nylon 6, and any combination can be used. Further, the core component and the sheath component may be combined concentrically or eccentrically. The core-sheath weight ratio is preferably in the range of 1/3 to 3/1, particularly preferably 1/2 to 2/1. 1/3
If the amount is less than the above, the effect of preventing discoloration becomes small, and if it exceeds 3/1, it may be difficult to cover the core component with the sheath component during spinning.

The yarn used for the surface layer may be a yarn made of a fiber not containing the artificial cellulose fiber. For example, the content of raw yarns, filament processed yarns, composite processed yarns, natural fibers such as cotton, hemp, wool, silk, and white pigments made of synthetic fibers such as polyamide, polyester, acrylic, polyurethane, and polypropylene is less than 1% by weight. There are an artificial cellulose fiber raw yarn, a filament processed yarn, a composite processed yarn and the like. Further, a composite yarn of synthetic fibers and fibers other than the artificial cellulose fibers may be used. For example, an interlaced false twisted yarn of a polyester yarn and a cupra yarn not containing a white pigment, a twisted yarn in which a rayon yarn not containing a white pigment is a core yarn and a polyester is a sheath yarn, and the like. Other examples of the compounding method include interlacing, air blending such as Taslan, false twisting after air blending, interlacing after false twisting, twisting, spinning, spinning twisting, and the like. The single yarn denier and the fiber length of these are not particularly limited and may be short fibers or long fibers. However, since they are used for clothing, 30 to 200 denier is preferable.

The fabric of the present invention is a fabric having a multi-layer structure of two or more layers. Here, the multilayer structure refers to a structure in which two or more types of structures are apparently overlapped in a layer state to form one cloth, and the form may be either a woven fabric or a knitted fabric. For example, with respect to the woven fabric, a multi-layer structure having two or more layers such as a warp double woven fabric, a weft double woven fabric, and a triple woven fabric can be used. Regarding knitted fabrics, weft knitted fabrics and warp knitted fabrics are included, and the weft knitted fabric basically becomes a two-layered fabric when a double weft knitting machine is used, but depending on the texture and yarn use, the binding layer is considered to be one layer, the surface layer, A knitted fabric with three or more layers together with the back layer. For example, weft knitted fabric having three or more layers can be made by double-sided tucking or plating. In addition, even if it is a single-layer knitted fabric such as a flat knitted fabric with a single weft knitting machine, depending on the organization, the tuck is applied to a specific knitted fabric such as the Kanoko knitting to give a partial ridge to the apparently two It may be formed into a layer or a weft knitted fabric having two or more layers by splicing (plating). The warp knitted fabric includes a warp knitted fabric knitted in multiple layers such as a two-layered, three-layered, four-layered or five-layered knitted fabric as in the case of the woven fabric. For example, it is a cloth having a multilayer structure in which front and back are integrated and reversible. As the structure to be used, any structure may be adopted depending on the use for the woven or knitted fabric, but the intermediate layer and / or the back layer may be visible.

To enhance the water absorption of the multilayer fabric of the present invention, an absorbent may be added at the final stage of the dyeing and finishing process of the multilayer fabric. When the water absorbing agent is provided in this manner, the affinity of the synthetic fiber with water is improved, the diffusivity of water is improved, and the degree of discoloration is reduced. For example, SR series manufactured by Takamatsu Yushi Co., Ltd.
3-5% ow of a water absorbing agent or a hydrophilizing agent containing a hydrophilic copolymer such as Fine Set F101 manufactured by Senka Co., Ltd. as a main component
f It is good to add. At that time, it is preferable to perform a finishing treatment for improving the durability of the water-absorbing agent for washing or long-term wearing, because the discoloration preventing effect can be maintained for a long period of time.

Next, the definition and measurement or evaluation method of various physical properties of the yarn constituting the multi-layered fabric according to the present invention and the multi-layered fabric itself will be summarized below. (1) Crimp elongation rate Measured by the JIS-L-1090 (1992) synthetic fiber bulky processed yarn test method, 5.7 stretching method B method. First, a pretreated test piece is prepared by the following method. The sample was hung on a rod that would not damage the sample and made 5 rings.
A load of 2 mgf × denier of indicated sample is applied to each. Next, these five samples were put together to about 50 cm.
Remove the weight immediately after firmly tying the upper and lower parts with cotton thread. Subsequently, a dry heat treatment was performed at 90 ° C. for 15 minutes while applying a load of 0.3 mgf × 10 × sample denier,
Leave for 24 hours after removing the weight. Based on the JIS-L-1090, 5.7 elasticity B method, a sample of 10 bundles subjected to such pretreatment was applied with an initial load of 2 mgf × 10 × denier of the indicated sample, The upper part of the sample piece is fixed with a clamp so that the test length becomes about 20 cm, and the sample length (a) after 30 seconds is accurately measured. Next, a sample length (b) after 30 seconds by applying a load of 0.1 gf × 10 × denier of the sample display
Is measured accurately. Then, the crimp elongation rate (%) is calculated by the following equation. Crimp elongation (%) = [(ba) / a] × 100

(2) Water Absorption of Yarn The water absorption of the multilayer fabric can be measured, but the water absorption of the yarn itself cannot be measured because the water absorption of a plurality of constituent yarns is complex. Therefore, the yarns constituting the multi-layered fabric are skein-wound, and the sample yarn is obtained by scouring, dyeing and drying under the same conditions as the scouring, dyeing and drying steps used in the production of the intended multi-layered fabric. However, when the used yarn is a filament yarn, a single yarn denier having the same single yarn denier as the filament yarn used in Examples and Comparative Examples is bundled so that the total denier becomes 75d ± 5d. Is prepared, twisted at 300 T / m, set with steam at 100 ° C. for 15 minutes, dried, and left at 20 ° C. and 65% RH for 24 hours to prepare a sample thread. When the used yarn is a spun yarn, a yarn having a thickness and a twist corresponding to 10 s of a cotton yarn having a twist of the number of twists per m such that the twist coefficient represented by the following formula becomes 120 is prepared by plying as a sample yarn. . T = α × ΔNT T: Number of twists per m, N: Cotton count, α: Twisting coefficient 50 cm as a measurement sample was cut from the sample yarn thus prepared, and 0.1 g / d with the upper end fixed.
Is applied to the lower end of the yarn, and the lower end is immersed in water (normal temperature). After 10 minutes, the vertical distance of the water is measured. The evaluation is performed with an average value of 10 pieces. This sucking distance is 2
When the water absorption is not less than cm, it is evaluated that the water absorption is good.

(3) Water diffusibility of yarn The water diffusivity is measured using the same yarn as the sample yarn used for the measurement of water absorption. 1 m of the sample yarn is cut, and one end of the yarn is fixed. A portion close to the other end is hooked on a pulley, and a horizontal load is applied to the end by applying a load of 0.1 g / d. 0.01 cc of water is applied near the center of the thread under tension, and the horizontal movement distance of the water after 10 minutes is measured. The measurement was carried out at 20 ° C. and a humidity of 65% RH, and the water diffusibility was evaluated by averaging ten measured values. A yarn having a migration distance of 10 cm or more is evaluated as having good water diffusibility.

(4) Evaluation of discoloration-preventing property of fabrics Numerical evaluation and sensory evaluation by a colorimeter shown below were performed together. (A) Color difference (ΔE *) indicated by a numerical value from a colorimeter Macbeth Color Eye 3 manufactured by Sakata Inx Co., Ltd.
000. A dried sample sample of about 10 cm × 10 cm is folded in two and applied to a colorimeter having a diameter of 2.5 cm of a colorimeter.
And the perceived chromaticity index a ^* , b ^* and lightness L ^*
Get. The obtained values are used as the standard values of the perceived chromaticity index and lightness, respectively. Next, 1 ml of water was applied to the sample sample, and after 30 seconds, the wetted and spread portion was measured.
Obtain ^* , b ^* and lightness L ^* . The obtained values are used as trial values of the perceived chromaticity index and lightness, respectively. The difference between the standard value and the trial value of the perceived chromaticity indices a ^* and b ^* and the lightness L ^* is substituted into the following equation, and the color difference ΔE ^*
Get. The number of samples is two. ΔE ^* = ｛(ΔL ^* ) ² + (Δa ^* ) ² + (Δ
b ^* ) ² ｝ ^1/2 (b) Sensory evaluation Five examiners were asked to visually evaluate the degree of discoloration, and the average of the obtained evaluations was classified according to the following sensory evaluation criteria. Specifically, a 20 cm × 20 cm sample of a fabric is prepared, and 1 ml of water is dripped at a substantially central portion thereof with a pipette. After 30 seconds, the discolored portion and the peripheral area are compared. In order from the one with the smallest discoloration ◎ ↑ There is no difference in color between wet and dry ◎ 殆 ど な い There is almost no ○ 〃 あ ま り Not so much △ 〃 〃 Somewhat × 〃 大 い に Great Feel uncomfortable
The preferred color difference in dry and wet conditions is 5 or less.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to examples. However, the present invention is not limited by these examples. In order to clarify the description of each example and each comparative example, physical property values and processing conditions common to a plurality of examples are collectively described below before describing the examples. Example 1
7 to 7 and Comparative Examples 1 to 4 are collectively shown in Table 1 after Examples 1 to 7 and Comparative Examples 1 to 4. Also,
Surface photographs of the cloths obtained in Examples and Comparative Examples were taken, and the surface was observed by calculating the ratio of the area occupied by each yarn constituting the cloth to the surface by using image analysis.

(1) Deformed cross-section yarn A yarn made of fibers having a W-shaped cross section and a degree of irregularity of 1.55 is used. (2) Scouring bath ratio 1:20 Temperature × time 80 ° C. × 20 minutes Score roll 2 g / L (Kao) (Manufactured by Co., Ltd.) (3) Dye ester fiber Dianix Blue UN-SE 1.0% owf (manufactured by Dyster Co., Ltd.) Cellulose fiber Sumixix Brilliant Blue R 1.0% owf (manufactured by Sumitomo Chemical Co., Ltd.)

(4) Dyeing conditions Dyeing of polyester fiber Bath ratio 1:40 Temperature × time 130 ° C. × 30 minutes pH5 Buffer solution (CH ₃ COOH, CH ₃ COONa) Soaping bath ratio 1:20 Soaping agent Sanmor RC700 2 g / L (Nichika Chemical Co., Ltd.) NaOH 2 g / L Sodium hydrosulfite 2 g / L (Katayama Chemical Co., Ltd.) Temperature × hour 95 ° C. × 30 minutes Cellulose fiber dyeing bath ratio 1:40 Temperature × hour 60 ° C. × 30 minutes Auxiliary agent Na ₂ SO ₄ 50 g / L Na ₂ CO ₃ 15 g / L Soaping bath ratio 1:20 Soaping agent Granup P 1 g / L (manufactured by Sanyo Kasei Co., Ltd.) Temperature × time 80 ° C. × 10 minutes Dyeing of composite fabric of polyester fiber and cellulose fiber The dyeing of the above-mentioned composite fabric is performed by dyeing polyester fiber and then dyeing cellulose fiber. It was. (5) Water absorption processing conditions Bath ratio 1:20 Water absorption processing agent SR-1000 5% owf (manufactured by Takamatsu Yushi Co., Ltd.) Temperature x time 95 ° C x 30 minutes

(6) Filament processing conditions The yarn was false twisted under the following two conditions to obtain crimped yarn. False twisting conditions (1): using Mitsubishi LS-2, spindle rotation speed 250,000 rpm, twist number Z-3200T / M Fast heater temperature 190 ° C, second heater temperature 18
False twisting at 0 ° C, 12% relaxation rate, crimp elongation rate 18
~ 22% processed yarn is obtained. False twisting condition (2): Mitsubishi LS-2, spindle rotation speed 250,000 rpm, twist number Z-3200T / M Fast heater temperature 190 ° C, second heater temperature 18
False twisting at 0 ° C, 6% relaxation rate, crimp elongation rate 7-8
% Processed yarn. Composite false twisting conditions (interlaced false twisting) with a Murata 33H false twisting machine, and the feed rate of the inner layer of the yarn 1% and 4% yarn feed rate of the outer layer, interlaced air pressure 2.0 kg / cm ² After processing, DR = 1.04 times, processing speed 40 with Murata Machinery 33H false twisting machine
0m / min, twist number 2400T / M, heater temperature 180 ° C
Was false twisted.

[0030]

【Example】

[Example 1] A polyester yarn containing 0.1% by weight of titanium oxide at 75d / 24f in the front and back layers was processed under the processing condition (1) to have a crimp elongation of 20%, and 7 in the middle layer.
A cupra yarn containing 1.5% by weight of titanium oxide at 5d / 45f was used to fabricate a 3-layer knitted fabric with a basis weight of 125 g / m ² into 28 layers.
It was knitted by a double circular knitting machine of GG and dyed. A knitting diagram of this knitted fabric is shown in FIG. A knitted fabric knitted by a double circular knitting machine is originally a combination of knitted fabric portions knitted by a cylinder needle and a dial needle, and in that sense is a two-layer fabric. However, since the knitted fabric is a three-dimensional structure, 1.4 in FIG.
The surface layer is knitted by knitting, and the back layer is knitted by 3.6 knitting, and the surface layer and the backing layer are connected by the intermediate layer shown by 2.5 to obtain a three-layer fabric. Observation of the surface morphology of this fabric revealed that 52% of the yarns in the surface layer and 4% in the middle layer
It accounted for 8%. As shown in Table 1, the obtained cloth has very little discoloration when wet.

[Example 2] A polyester yarn containing 0.1% by weight of titanium oxide at 75d / 24f in the surface layer was processed under the processing conditions (1) to have a crimp elongation of 20%, and a middle layer of 75d / A viscose rayon yarn containing 1.5% by weight of titanium oxide at 45f and a polyester yarn containing 0.1% by weight of titanium oxide at 75d / 24f in the back layer were processed under the processing conditions (2) and crimped and stretched. Using a yarn with a rate of 7%,
A three-layer knitted fabric having a basis weight of 125 g / m ² similar to that of Example 1 was prepared and dyed. Observing the surface morphology of this fabric,
52% of the yarn was in the surface layer and 48% was in the middle layer. As shown in Table 1, the obtained fabric has little discoloration when wet.

[Example 3] A polyester yarn containing 3% by weight of titanium oxide at 75d / 36f in the surface layer was processed under the processing condition (1) to have a crimp elongation of 20%, and 7 in the middle layer.
A viscose rayon yarn containing 5% by weight of titanium oxide at 5d / 45f and a polyester yarn containing 0.1% by weight of titanium oxide at 75d / 24f in the back layer were processed under the processing conditions (2) and wound. A three-layer knitted fabric having a basis weight of 125 g / m ² similar to that of Example 1 was prepared using a yarn having a shrinkage / expansion rate of 7%, dyed, and then subjected to water absorption processing. Observation of the surface morphology of this fabric revealed that 52% of the yarns in the surface layer and 4% in the middle layer
It accounted for 8%. As shown in Table 1, the resulting fabric showed very little discoloration when wet, and did not feel wet.

[Example 4] A polyester yarn containing 0.3% by weight of titanium oxide at 75d / 96f in the surface layer was processed under the processing condition (1) to have a crimp elongation of 20%, and the middle layer had 75d / A viscose rayon yarn containing 45% by weight of titanium oxide at 4% by weight, and a polyester yarn containing 75% / 24% by weight of titanium oxide at 0.1% by weight in the back layer were processed under processing conditions (2) to obtain a crimp elongation of 7 A 3-layer knitted fabric having a basis weight of 128 g / m ² similar to that of Example 1 was prepared by using the yarns of which the ratio was 100% and dyed. Observing the surface morphology of this fabric,
52% of the yarn was in the surface layer and 48% was in the middle layer. As shown in Table 1, the obtained cloth has little discoloration when wet.

[Example 5] A polyester yarn containing 0.1% by weight of titanium oxide at 75d / 24f in the surface layer was processed under the processing condition (1) to have a crimp elongation of 20%, and the middle layer was 75d / A cupra yarn containing 1% by weight of titanium oxide at 45f and a titanium oxide layer of 0.1% at 75d / 24f on the back layer.
A polyester yarn containing 100% by weight was processed under the processing conditions (2), and a yarn having a crimp elongation of 7% was used to give a basis weight of 124 g / m 2.
A three-layer knitted fabric similar to that of Example 1 of ² was prepared and dyed. Observation of the surface morphology of this fabric revealed that the surface yarn was 52
%, And the yarn in the middle layer occupies 48%. As shown in Table 1, the obtained cloth has little discoloration when wet.

[Example 6] A polyester yarn containing 0.3% by weight of titanium oxide at 75d / 96f in the surface layer was processed under the processing condition (1) to have a crimp elongation of 18%, and a middle layer of 75d / A cupra yarn containing 1.5% by weight of titanium oxide at 45f, and 1 layer of titanium oxide at 75d / 45f on the back layer.
12% by weight of viscose rayon yarn
A three-layer knitted fabric similar to Example 1 of 7 g / m ² was prepared and dyed. Observation of the surface morphology of this fabric revealed that 52% of the yarn was in the surface layer and 48% was in the middle layer. As shown in Table 1, the obtained cloth has little discoloration when wet.

[Example 7] 75d / 36 having a core-sheath weight ratio of 1/1, comprising a core part containing 7% by weight of titanium oxide at 75d / 36f and a sheath part containing 0.05% by weight in the surface layer.
The polyester core-sheath type composite fiber yarn of f was processed under the processing condition (1), and the crimp elongation was 20%, and the intermediate layer was 75d / 4.
An interlaced false twist of a W-shaped deformed cross-section yarn of a cupra yarn containing 5% of titanium oxide at 5f and a polyester yarn containing 0.8% of titanium oxide at 75d / 30f under a composite false twist condition, and An example having a basis weight of 127 g / m ² using a fine denier yarn of polyester yarn containing 0.1% by weight of titanium oxide at 75 d / 96 f in the back layer and having a crimp elongation of 7% under the processing condition (2). A three-layer knitted fabric similar to that of No. 1 was created, and after dyeing, water absorption processing was performed. Observation of the surface morphology of this fabric revealed that 52% of the yarn was in the surface layer and 48% was in the middle layer. As shown in Table 1, the resulting fabric had very little discoloration when wet, and did not feel wet.

[Comparative Example 1] A polyester yarn containing 0.1% by weight of titanium oxide at 75d / 24f in the surface layer was processed under the processing condition (1) to have a crimp elongation of 20%, and a middle layer of 75d / The processing conditions were cupra yarn containing 0.1% by weight of titanium oxide at 45f and polyester yarn containing 0.1% by weight of titanium oxide at 75d / 24f in the back layer (2).
Using a yarn that has been processed with a crimp elongation of 7%,
A 5 g / m ² three-layer knitted fabric similar to that of Example 1 was prepared and dyed. Observation of the surface morphology of this fabric revealed that 52% of the yarn was in the surface layer and 48% was in the middle layer. The obtained cloth had excellent processability, but as shown in Table 1, it became discolored when wet.

[Comparative Example 2] A polyester yarn containing 0.3% by weight of titanium oxide at 75d / 96f in the surface layer was processed under the processing condition (1) to obtain a crimp elongation of 20%, and a middle layer of 75d / A cupra yarn containing 6% by weight of titanium oxide at 45f, and a titanium oxide layer of 0.1% at 75d / 24f on the back layer.
A polyester yarn containing 100% by weight was processed under processing conditions (2), and a yarn having a crimp elongation of 7% was used, and a basis weight of 128 g /
The same three-layer knitted fabric as in Example 1 for m ² was prepared and dyed.
Observation of the surface morphology of this fabric revealed that the surface yarn was 52
%, And the yarn in the middle layer occupies 48%. As shown in Table 1, the obtained fabric had a small discoloration when wet, but the process passability was extremely poor.

[Comparative Example 3] A polyester yarn containing 0.3% by weight of titanium oxide at 75d / 96f in the surface layer was processed under the processing condition (1) to have a crimp elongation of 20%, and 75d / in the middle layer. A rayon yarn containing 45% of titanium oxide at 0.3% by weight, and a cupra yarn of 75d / 45f containing 0.5% of titanium oxide at the back layer were used.
A three-layer knitted fabric having the same g / m ² as in Example 1 was prepared and dyed. Observation of the surface morphology of this fabric revealed that 52% of the yarn was in the surface layer and 48% was in the middle layer. The obtained cloth had excellent processability, but as shown in Table 1, it became discolored when wet.

[Comparative Example 4] A polyester yarn containing 0.1% by weight of titanium oxide at 75d / 36f in the surface layer was processed under the processing condition (1) to have a crimp elongation of 20%, and the middle layer was 75d / Processing conditions were polyester threads containing 3% by weight of titanium oxide at 36f, and polyester threads containing 0.1% by weight of titanium oxide at 75d / 36f in the back layer (1).
Using a yarn that has been processed at 20% and has a crimp elongation of 20%,
A three-layer knit fabric of 23 g / m ² similar to that of Example 1 was prepared, dyed, and then subjected to water absorption processing. Observation of the surface morphology of this fabric revealed that 52% of the yarn was in the surface layer and 48% was in the middle layer. The obtained fabric had excellent processability, but as shown in Table 1, it changed color when wet.

[0041]

[Table 1]

[Embodiment 8] The core portion containing 50% by weight of warp and 8% by weight of titanium oxide and 0.05% of titanium oxide.
A polyester core-sheath type composite fiber yarn consisting of a sheath portion containing 1% by weight and having a core-sheath weight ratio of 1/1, and a cupra yarn containing 50% by weight of titanium oxide at 50d / 30f and a weft yarn of 75
d / 36f and the above polyester core-sheath type composite fiber yarn and 7
The cupra yarn containing 1.5% by weight of titanium oxide at 5d / 45f was used, and the warp density was 260 using a conventional double loom.
A double woven fabric having a weft density of 155 yarns and a basis weight of 145 g / m ² was prepared, dyed, and subjected to water absorption. This fabric had a structure in which the core-sheath structure yarn was the surface layer and the cupra was the back layer, and the discoloration when wet was very small, and the process passability was also good.

Example 9 Polyester yarn containing 50% warp and 3% by weight of titanium oxide and 50d / 3
Viscose rayon yarn containing 1.0% by weight of titanium oxide at 0f, weft yarn of 75d / 30f at 1.0% titanium oxide
Polyester W type modified cross-section yarn containing 75% by weight and 75d /
A viscose rayon yarn containing 45% of 1.0% by weight of titanium oxide was used, and a warp density of 26 was obtained using a conventional double loom.
A flat double woven fabric with 0 weft, 155 weft density, and basis weight of 145 g / m ² was prepared, and dyed and water-absorbed. This fabric had a structure in which polyester yarn was the surface layer and rayon was the back layer, and the discoloration when wet was very small and the process passability was also good.

[Comparative Example 5] Polyester yarn containing warp yarn of 50d / 36f and 0.1% by weight of titanium oxide and 50d
/ 30f cupra yarn containing no titanium oxide, weft 75d / 36f polyester yarn containing 0.1% by weight titanium oxide and 75d / 24f cupla yarn containing no titanium oxide, and using a conventional double loom Using warp density 2
A flat double woven fabric having 60 yarns, weft density of 155 yarns, and basis weight of 145 g / m ² was prepared, and dyed and water-absorbed. Although this cloth had good processability, it became discolored when wet.

[0045]

According to the present invention, discoloration of the fabric due to rain or sweat can be prevented, and as a result, a fabric without discomfort due to discoloration due to water can be provided. The multilayer fabric of the present invention had almost no trouble such as yarn breakage during the production of the raw material yarn and during the production of the fabric, and the process stability was good.

[Brief description of drawings]

FIG. 1 is a knitting diagram of a three-layer knitted fabric showing an example of a multilayer fabric.

[Explanation of Codes] 2,5 ... Knitting for intermediate layer knitting 1, 4 ... Knitting for surface layer knitting 3, 6 ... Knitting for back layer knitting

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location D04B 1/14 D04B 1/14

Claims (3)

[Claims] 1. A fabric having a multilayer structure of two or more layers consisting of a surface layer and at least one layer other than the surface layer, wherein at least one layer other than the surface layer has a white pigment content of 1% by weight or more and 5% by weight or more. % Of artificial cellulose fibers at least 50% by weight, and the surface layer is made of fibers other than the artificial cellulose fibers, which has a multilayer structure. 2. A fabric having a multi-layer structure according to claim 1, comprising three layers of a front layer, an intermediate layer and a back layer. 3. The fabric having a multi-layer structure according to claim 1, wherein the yarn constituting the surface layer is a yarn made of synthetic fiber.