JP2002105796A - Light-shielding woven fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a woven fabric having improved light-shielding properties such as see-through preventing property and UV-shielding property, and thin, light-weight and having soft feeling. SOLUTION: The woven fabric is constructed with polytrimethylene terephthalate fiber, has a rate of hole area of >=3%, a thickness of <=0.25 mm and an apparent density of <=0.7 g/cm3, and contains >=1.0 wt.% of inorganic oxide particles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to clothing, tents, and the like for outerwear, sports, rainwear, hats, etc., which have improved light-shielding properties such as see-through resistance and ultraviolet ray shielding properties, and are thin, lightweight and soft. The present invention relates to a woven fabric suitably used for materials such as curtains and umbrellas.

[0002]

2. Description of the Related Art Conventionally, inorganic oxide fine particles having a high light-shielding property are kneaded in a fiber at a high concentration in order to enhance the light-shielding properties such as the sheer-shielding property and ultraviolet ray-shielding property of textiles such as outer clothing and sports clothing. Methods and methods for increasing the cover factor of the woven fabric have been proposed. JP-A-55-158331
According to the publication, the core contains titanium oxide at a high concentration of 1.0% by weight or more, and the sheath contains titanium oxide at less than 1.0% by weight. And a woven fabric having improved sheer resistance is disclosed. However, a material with high light shielding properties is kneaded inside the fiber,
Even if the light shielding property of the fiber is enhanced, it is not possible to prevent the transmission of light from the opening at the intersection of the warp and the weft of the woven fabric, so that the woven fabric has insufficient light shielding property.

Japanese Patent Application Laid-Open No. 11-81084 discloses a sheath-core composite fiber in which a polyester containing a metal oxide at a high concentration is provided in a core portion and a polyester made of polytrimethylene terephthalate fiber is provided in a sheath portion. A polyester conjugate fiber having excellent coloring properties, light-shielding properties, soft texture, light resistance, and good spinnability is disclosed. However, the woven fabric made of the polyester composite fiber does not satisfy both the light-shielding property and the soft texture because the porosity and the apparent density are not considered. JP 6
JP-A 1-146840 discloses a woven fabric in which the cover factor is specified to be a certain level or more. A woven fabric in which the cover factor is increased to increase the density of the woven fabric improves the light shielding property, but increases the basis weight and thickness of the woven fabric. And the texture becomes hard.

[0004] Japanese Patent Application Laid-Open No. 9-209455 discloses that
A method is disclosed in which a woven fabric is composed of fibers having different softening points, and a heat-pressing treatment is performed on the fibers having a low softening point to fill the gaps between the fibers to enhance the ultraviolet shielding property.However, in this method, the woven fabric is crushed by hot pressing. However, there is a problem that the texture becomes hard and paper-like. Patent No. 28885
No. 04 discloses a fiber structure containing 1% by weight or more of a component having a performance of reflecting or absorbing ultraviolet rays and defining the transmittance of ultraviolet rays, the reflectance of visible light rays, and the air permeability. The thin, lightweight, and soft properties of the structure were not sufficiently considered.

Further, Japanese Patent Application Laid-Open No. 11-81141 discloses a high-density soft-textile woven fabric in which a polytrimethylene terephthalate fiber is used for the weft and / or warp of the woven fabric and the woven fabric is subjected to resin processing. Also, JP
In Japanese Patent Application Publication No. 1-200174, the ratio of the warp cover rate to the weft cover rate and the sum of the cover rates are defined, and the elastic recovery rate is 9%.
A soft-textured, high-density woven fabric composed of 0% or more of polytrimethylene terephthalate fiber is disclosed. However, although the fabric and the rubbing sound are improved by forming the fabric with the flexible polytrimethylene terephthalate fiber, consideration is given to the porosity of the fabric and the light shielding property of inorganic oxide fine particles. Therefore, the light-shielding property was insufficient.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to improve the light-shielding properties such as the sheer-shielding property and the ultraviolet ray shielding property,
It is intended to provide a lightweight, soft-textile fabric.

[0007]

Means for Solving the Problems The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, have made a fabric made of polytrimethylene terephthalate fiber, and added a certain percentage of inorganic oxide fine particles to the fabric. The present inventors have found that the object of the present invention can be solved by making the porosity and the apparent density in a specific range so as to achieve the present invention. That is, the present invention relates to a woven fabric composed of polytrimethylene terephthalate fibers, wherein the porosity of the woven fabric is 3% or less and the thickness is 0.2% or less.
A light-shielding woven fabric having a size of 5 mm or less, an apparent density of 0.7 g / cm ³ or less, and containing the inorganic oxide fine particles in an amount of 1.0% by weight or more.

Hereinafter, the present invention will be described in detail. In the present invention, the polytrimethylene terephthalate fiber refers to a polyester fiber having a trimethylene terephthalate unit as a main repeating unit, and the trimethylene terephthalate unit has about 50 mol% or more, preferably 70 mol% or more, and more preferably 80 mol%. Above, more preferably 90 mol% or more. Therefore, the total amount of the other acid component and / or glycol component as the third component is about 5%.
0 mol% or less, preferably 30 mol% or less, and more preferably 2 mol% or less.
The polytrimethylene terephthalate contained in a range of 0 mol% or less, more preferably 10 mol% or less is included.

[0009] Polytrimethylene terephthalate is produced by condensing terephthalic acid or a functional derivative thereof with trimethylene glycol or a functional derivative thereof in the presence of a catalyst under appropriate reaction conditions. In this production process, an appropriate one or two or more third components may be added to form a copolymerized polyester, or
Polyester other than polytrimethylene terephthalate, such as polyethylene terephthalate, may be separately produced from polytrimethylene terephthalate, and then blended or composite-spun (sheath core, side-by-side, etc.).

The third components to be added include aliphatic dicarboxylic acids (oxalic acid, adipic acid, etc.), alicyclic dicarboxylic acids (cyclohexane dicarboxylic acid, etc.), and aromatic dicarboxylic acids (isophthalic acid, sodium sulfoisophthalic acid, etc.). ), Aliphatic glycols (ethylene glycol, 1,2
-Propylene glycol, tetramethylene glycol, etc.), alicyclic glycols (cyclohexane dimethanol, etc.), aliphatic glycols containing aromatics (1,4-bis (β-hydroxyethoxy) benzene, etc.), polyether glycols (polyethylene glycol) , Polypropylene glycol and the like), aliphatic oxycarboxylic acids (such as ω-oxycaproic acid), and aromatic oxycarboxylic acids (such as P-oxybenzoic acid). Compounds having one or more ester-forming functional groups (such as benzoic acid or glycerin) can also be used as long as the polymer is substantially linear.

In the present invention, the polytrimethylene terephthalate fiber is spun at a take-up speed of about 1500 m / min to obtain an undrawn yarn and then twisted at a rate of about 2 to 3.5 times. Any of a direct drawing method (spin draw method) in which the drawing and twisting step is directly connected and a high-speed spinning method (spin take-up method) with a winding speed of 5000 m / min or more may be adopted. In addition, the form of the fiber may be a long fiber or a short fiber, may be uniform in the length direction or may be thick and thin,
Round, triangular, L-shaped, T-shaped, Y-shaped, W
It may be a polygonal type such as a mold, an eight-leaf type, a flat shape, a dogbone type, etc., a multi-leaf type, a hollow type or an irregular shape. Further, as the form of the yarn, multifilament raw yarn (including ultrafine yarn), sweet twisted yarn to strong twisted yarn, mixed yarn, false twisted yarn (including drawn false twisted yarn of POY), fluid jet processed yarn, spun yarn, etc. And the fineness of single yarn can be about 0.1 to 5 dtex. The fineness is more preferably 0.1 to 2.2 dtex to further improve the softness of the woven fabric.

The polytrimethylene terephthalate fiber used in the present invention preferably contains inorganic oxide fine particles in an amount of 1% by weight or more, more preferably 2% by weight or more, in order to enhance light-shielding properties. The method of containing the inorganic oxide fine particles may be uniformly dispersed and contained in the fiber,
As a sheath-core type fiber having a sheath-core weight ratio of 1/4 to 4/1, the core contains 3.0 to 20.0% by weight of inorganic oxide fine particles in the sheath and 1.0% by weight or less. This method is more preferable in view of workability such as weaving of fibers.

The polytrimethylene terephthalate fiber is preferably entangled and mixed with another fiber (different shrinkage mixed yarn with high shrinkage yarn) in an amount of 50% by weight or less so as not to impair the object of the present invention. Etc.), alternate twist, composite false twist (elongation difference false twist, etc.),
They may be mixed by means such as two-feed fluid jet processing. The fibers to be mixed may be any fibers, but polyester, polyamide, polyacrylonitrile, polyvinyl,
Synthetic fibers such as polypropylene and polyurethane can be preferably mixed. The woven fabric of the present invention needs to be composed of the above-mentioned polytrimethylene terephthalate fiber, and the polytrimethylene terephthalate fiber is used for the warp and / or weft of the woven fabric. At this time, the polytrimethylene terephthalate fiber preferably constitutes at least 40% by weight of the woven fabric, and more preferably at least 50% by weight.

[0014] By constructing the woven fabric of the present invention with polytrimethylene terephthalate fibers, even if the porosity of the woven fabric is reduced in order to improve the light shielding property of the woven fabric, the woven fabric can be formed by the flexibility of the polytrimethylene terephthalate fibers. A soft texture can be maintained. In the woven fabric of the present invention, polytrimethylene terephthalate fibers and other fibers may be interwoven. As the fibers to be interwoven, synthetic fibers such as polyester, polyamide, polyacrylonitrile, polyvinyl, polypropylene, and polyurethane, cotton, wool, silk,
It can be interwoven with natural fibers such as hemp and artificial cellulose fibers such as cupra, rayon, acetate, polynosic, lyocell, etc. More preferably, the inorganic oxide fine particles are contained in the fiber at 1.0% by weight or more. It is good to interweave with synthetic fibers and artificial cellulose fibers.
More preferably, a polyester-based fiber in which the weight ratio of the sheath core is 1/4 to 4/1 and the core portion contains 3.0 to 20.0% by weight and the sheath portion contains 1.0% by weight or less. And a synthetic fiber such as polyamide.

The fibers to be interwoven include multifilament raw yarns (including ultrafine yarns), sweet twisted yarns to strong twisted yarns, mixed yarns, false twisted yarns (including drawn false twisted yarns of POY), fluid jet processed yarns, A spun yarn or the like can be used, and the cross-sectional shape is a polygonal shape such as a round shape, a triangular shape, an L shape, a T shape, a Y shape, a W shape, a Yaba shape, a flat shape, a dog bone shape, a multi-leaf shape, It may be hollow or irregular. The fineness of the single yarn can be about 0.1 to 5 dtex, but 0.1 to 2.2 dtex is more preferable in order to improve the softness of the woven fabric. The method of weaving is to use polytrimethylene terephthalate fiber only for the warp or weft, or to mix and mix the warp and / or weft with polytrimethylene terephthalate fiber and other fibers one by one or two alternately. Etc. can be interwoven.

The woven fabric of the present invention needs to contain 1% by weight or more of inorganic oxide fine particles. It is more preferably at least 2% by weight. Content of inorganic oxide fine particles is 1% by weight
If it is less than 1, the light-shielding property is remarkably inferior. The type of the inorganic oxide fine particles to be contained is not particularly limited as long as it does not hinder the production of the raw yarn. For example, titanium oxide, zinc oxide, magnesium oxide, calcium carbonate, barium sulfate and the like can be used. These inorganic oxide fine particles may be used alone or in combination of two or more.
Generally, the average particle size of the inorganic oxide fine particles used is preferably about 1 micron or less. Coarse particles of about 2 microns or more undesirably lead to yarn breakage during spinning. More preferably it is less than 0.5 micron, most preferably less than 0.2 micron.

The method of containing the inorganic oxide fine particles in an amount of 1% by weight or more is preferably a method of uniformly dispersing and kneading the inside of the fiber, or kneading at a high concentration into the core of the fiber in the form of a sheath-core structure. However, the binder may be bonded to the surface of the fabric with a binder to such an extent that the texture of the fabric is not roughened. Further, it is preferable that the inorganic oxide fine particles are contained in all kinds of fibers constituting the woven fabric of the present invention in an amount of 1% by weight or more. May be contained only in some of the fibers. In addition, the woven fabric of the present invention needs to have a porosity of 3% or less in order to provide sufficient light-shielding properties.
It is more preferably at most 2%, further preferably at most 1.5%. When the porosity of the woven fabric exceeds 3%,
The ultraviolet shielding properties are significantly reduced.

The porosity referred to in the present invention indicates, in terms of area ratio, substantially what percentage of through holes are present in a given area of the woven fabric. The method for measuring the aperture ratio is, for example, taking an enlarged photograph (magnification: 20 to 40 times) in which the aperture is white and the fiber is black in a state where light is applied from the back of the fabric by an optical microscope. The image of the photograph is taken into the computer by the CCD camera, the image taken by the image processing software is binarized into white and black by the hue difference, and the area ratio of the white (opening portion) in the whole area is calculated. Alternatively, the value is obtained from the weight ratio of white and black in an enlarged photograph in which the opening is white and the fiber is black.

The thickness of the woven fabric of the present invention is 0.25 mm or less in order to maintain a thin and soft texture, and it is important that the apparent density of the woven fabric be 0.7 g / cm ³ or less. More preferably, the apparent density of the fabric is 0.6 g / c.
m ³ or less. When the thickness of the woven fabric exceeds 0.25 mm, the light-shielding property is enhanced, but the woven fabric becomes thick and the soft texture cannot be maintained. On the other hand, when the apparent density exceeds 0.7 g / cm ³ , the light shielding property is enhanced, but the fabric has a hard texture. Here, the apparent density is a load of 5 g / cm ² measured by a thickness gauge.
The thickness (mm) of the woven or knitted fabric is measured, and the value is calculated below from the relationship between the basis weight (g / m ² ) and the thickness (mm) of the woven or knitted fabric. Apparent density (g / cm ³ ) = weight (g / m ² ) / [thickness (mm) × 1000]

The woven structure of the woven fabric of the present invention is not particularly limited, and may be plain weave (including side-by-side weave), twill weave, satin weave,
Double weave or the like can be used. In addition, the finishing process of the woven fabric may be performed in the order of scouring, presetting, dyeing, and final setting in a dyeing finishing process generally performed in general, but before or after the final setting, a metal roll (80 to 13) is used.
(0 ° C.) and a rubber, and it is preferable to perform a cam fitting process in which the woven fabric is pressed while the woven fabric is being pressed by a change in the surface speed of the rubber, or a flexible process by tumbler drying. The fineness of the single fibers in the woven fabric is reduced by the fibrillation effect by the cam fitting process or the tumbler drying, so that the texture becomes softer, and at the same time, the porosity of the woven fabric is reduced due to the dispersion of the single fibers, so that the light shielding property is enhanced.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described specifically with reference to Examples and the like, but the present invention is not limited to these Examples and the like. In addition, the measuring method of a textile characteristic is demonstrated below. (1) Transparency (ΔL) Lightness measured by placing a blackboard with an L value (lightness) of 1 ± 0.5 on the back of a test cloth (one piece) using a spectrophotometer (Macbeth CE-3000) Is Lb, the lightness measured by placing a white plate having an L value of 92 ± 0.5 on the back surface of the test cloth (one sheet) is Lw, and ΔL = Lw−Lb, and the sheer-proof property (ΔL) was obtained. In addition, the same test cloth was repeatedly measured three times, and ΔL was determined by averaging the three measurements.

(2) Ultraviolet ray shielding property The ultraviolet ray shielding rate was measured every 2 nm at a wavelength of 280 to 400 nm using a spectrophotometer (UV-2200 manufactured by Shimadzu Corporation), and the average ultraviolet ray shielding rate at 280 to 400 nm was determined. (3) Texture The softness of the woven fabric was evaluated by a sensory test using five monitors, with four levels: ◎: very good, ：: good, Δ: slightly poor, ×: very poor. The judgment of five people was averaged. (4) Cover factor When the number of warp or weft yarns of the woven fabric per 1 inch (2.54 cm) width is defined as the respective yarn density, it is calculated by the following formula. Warp cover factor = warp density x (warp decitex) ^0.5 Weft cover factor = weft density x (weft decitex) ^0.5

[0023]

Example 1 Polypropylene containing 0.5% titanium oxide in warp
Trimethylene terephthalate fiber (56 dtex 2
4 filaments), containing 8.0% by weight of titanium oxide in the weft
Core having polyethylene terephthalate and acid
Polytrimethylene tere containing 0.5% by weight of titanium halide
Consists of a sheath made of phthalate, with a core-sheath weight ratio of 1/1
Concentric polyethylene terephthalate / polyte
Limethylene terephthalate core-sheath type synthetic fiber (84 d
Tex 36 filament) to obtain a flat tissue greige
Was. This machine is desizing and scouring with a continuous scouring machine.
Pre-set at 160 ° C with a dry heat treatment machine
Thereafter, dyeing is carried out at 130 ° C. by a jet dyeing machine.
A dry heat set at 60 ° C. was performed. In addition, 100
° C, φ350mm metal roll, rubber thickness 30mm
As a result of cam fitting processing and finishing,
The warp density is 138 lines / inch and the weft density is 98 lines / inch.
Yes, the sum of the warp and weft cover factors is 1931,
The titanium oxide content is 2.43% by weight, and the porosity is 2.41.
%, Thickness 0.15mm, apparent density 0.53g / c
m ^ThreeMet. The woven fabric has good UV shielding and anti-sheer properties
It was good, thin, light and very good in texture.

[0024]

Example 2 Polytrimethylene terephthalate fiber containing 0.5% titanium oxide in warp (56 dtex 2)
4 filaments), a weft comprising a core made of polyethylene terephthalate containing 8.0% by weight of titanium oxide, and a sheath made of polyethylene terephthalate containing 0.5% by weight of titanium oxide. A concentric polyethylene terephthalate core-sheath type synthetic fiber (84 decitex, 36 filaments) was used to obtain a flat tissue greige. This greige machine was subjected to the same dyeing and finishing treatment as in Example 1, and as a result, the obtained fabric had a warp density of 137 yarns / inch and a weft density of 98 yarns / inch, and the sum of the warp and weft cover factors was 1923. , The titanium oxide content was 2.44% by weight, the porosity was 2.47%, and the thickness was 0.15.
mm, and the apparent density was 0.53 g / cm ³ . The woven fabric was excellent in both the ultraviolet shielding property and the sheer-proofing property, and was thin, lightweight and very good in texture.

[0025]

Example 3 Using the same warp and weft as in Example 2, a green fabric having a twill structure was obtained. The greige machine was desizing and scouring with a continuous scouring machine, and after pre-setting at 160 ° C. by a pin tenter type dry heat treatment machine, dyeing was performed at 130 ° C. by a jet dyeing machine, followed by a dry heat setting at 160 ° C. I went and finished.
The resulting fabric has a density of 193 yarns / inch and a weft density of 1
00 / inch, the sum of the warp and weft cover factors is 2361, the titanium oxide content is 2.14% by weight,
The porosity was 0.24%, the thickness was 0.14 mm, and the apparent density was 0.66 g / cm ³ . The woven fabric was very good in both the ultraviolet shielding property and the sheer-proofing property, and was thin, light and good in texture.

[0026]

Example 4 Polytrimethylene terephthalate fiber (0.5 dtex 2) containing 0.5% of titanium oxide in the warp
4 filaments) and a polytrimethylene terephthalate fiber (84 decitex 36 filaments) containing 2.0% by weight of titanium oxide in the weft to obtain a flat-textured green fabric. The greige machine was subjected to the same dyeing and finishing treatment as in Example 1. As a result, the obtained fabric had a warp density of 139 yarns / inch and a weft density of 100 yarns / inch, and the sum of the warp and weft cover factors was 1957. The titanium oxide content was 1.28% by weight, the porosity was 2.24%, the thickness was 0.16 mm, and the apparent density was 0.51 g / cm ³ . The woven fabric was excellent in both the ultraviolet shielding property and the sheer-proofing property, and was thin, lightweight and very good in texture.

[0027]

Example 5 Using the same warp and weft as in Example 2, a green fabric having a higher density than that of Example 2 was obtained. As a result of performing the same dyeing and finishing process on this greige machine as in Example 1, the obtained fabric had a warp density of 156 yarns / inch and a weft density of 113 yarns / inch, and the sum of the warp and weft cover factors was 220.
3. The titanium oxide content is 2.45% by weight and the porosity is 0.4%.
5%, thickness 0.17mm, apparent density 0.52g /
cm ³ . The woven fabric was very good in both the ultraviolet shielding property and the sheer-proofing property, and was thin, light and good in texture.

[0028]

[Comparative Example 1] A greige machine similar to that in Example 2 was desizing and scouring by a continuous scouring machine, and was heated to 160 ° C by a pin tenter type dry heat treatment machine.
After the pre-setting, dyeing was carried out at 130 ° C. by a jet dyeing machine, followed by dry heat setting at 170 ° C. Further, the fabric is subjected to a metal roll temperature of 160 ° C. and a pressure of 2450 N
The finished woven fabric has a warp density of 138 yarns / inch and a weft density of 97 yarns / inch. The sum of the warp and weft cover factors is 19.
22, the titanium oxide content was 2.42% by weight, the porosity was 2.02%, the thickness was 0.11 mm, and the apparent density was 0.7.
It was 2 g / cm ³ . The woven fabric was good in both the ultraviolet shielding property and the sheer-proofing property, but had a hard texture and was paper-like.

[0029]

COMPARATIVE EXAMPLE 2 Using the same warp and weft as in Example 2, a green fabric having a higher density flat structure than in Example 2 was obtained. The greige machine is desizing and scouring with a continuous scouring machine, and after pre-setting at 160 ° C. by a pin tenter type dry heat treatment machine, dyeing is performed at 130 ° C. by a jet dyeing machine, followed by a dry heat setting at 170 ° C. I went and finished. The warp density of the obtained woven fabric was 204 yarns / inch, the weft density was 113 yarns / inch, the sum of the cover factors of the warp and the weft was 2563, the titanium oxide content was 2.2% by weight, and the porosity was 0%. .1%, thickness 0.14m
m, and the apparent density was 0.73 g / cm ³ . The woven fabric was very good in both UV shielding and anti-sheer properties,
The texture was hard.

[0030]

Comparative Example 3 Using the same warp and weft as in Example 2, a flat-structured green fabric having a higher warp density and a lower weft density than in Example 2 was obtained. The greige machine was desizing and scouring with a continuous scouring machine, and after presetting at 160 ° C. with a pin tenter type dry heat treatment machine, dyeing was performed at 130 ° C. with a jet dyeing machine.
Finished by performing a dry heat setting at 70 ° C. The warp density of the obtained woven fabric is 156 yarns / inch, the weft density is 82 yarns / inch, the sum of the warp and weft cover factors is 1919, the titanium oxide content is 2.15% by weight, and the porosity is 3%. .1%,
The thickness is 0.14 mm and the apparent density is 0.56 g / cm ³
Met. The woven fabric was thin and lightweight, and had a good texture, but was inferior in ultraviolet shielding properties and anti-sheer properties.

[0031]

Comparative Example 4 Polytrimethylene terephthalate fiber (0.5 dtex 2) containing 0.5% titanium oxide in the warp
Using a polytrimethylene terephthalate fiber (84 decitex 36 filaments) containing 0.5% by weight of titanium oxide in the weft, a flat-textured greige similar to that of Example 1 was obtained. This greige machine was subjected to the same dyeing and finishing treatment as in Example 1. As a result, the warp density of the obtained woven fabric was 139 yarns / inch, the weft density was 99 yarns / inch, and the sum of the warp and weft cover factors was 1947. , The titanium oxide content is 0.5% by weight, the porosity is 2.39%, and the thickness is 0.15%.
mm, and the apparent density was 0.54 g / cm ³ . The woven fabric was thin and lightweight, and had a good texture, but was inferior in ultraviolet shielding properties and anti-sheer properties.

[0032]

Comparative Example 5 A core portion made of polyethylene terephthalate fiber containing 0.5% titanium oxide in a warp (24 filaments of 56 decitex), a core portion made of polyethylene terephthalate containing 8.0% by weight of titanium oxide in a weft, and 0% titanium oxide The same weaving as in Example 4 using concentric polyethylene terephthalate core-sheath type synthetic fibers (84 decitex 36 filaments) composed of a sheath portion made of polyethylene terephthalate containing 0.5% by weight and having a core-sheath weight ratio of 1/1. A flat tissue greige was obtained at a density. This greige machine was subjected to the same dyeing and finishing treatment as in Example 1. As a result, the warp density of the obtained woven fabric was 156 yarns / inch, the weft density was 113 yarns / inch, and the sum of the warp and weft cover factors was 219.
3. The titanium oxide content is 2.45% by weight and the porosity is 0.4%.
5%, thickness 0.17mm, apparent density 0.52g /
cm ³ . The woven fabric was very good in both the ultraviolet shielding property and the anti-transparent property, but had a hard texture.

[0033]

Comparative Example 6 Polytrimethylene terephthalate fiber containing 0.5% titanium oxide in warp (56 dtex 2)
4 filaments) and polytrimethylene terephthalate fibers (167 decitex 48 filaments) containing 2.0% by weight of titanium oxide in the weft were used to obtain a lined flat greige. As a result of performing the same dyeing finish processing on this greige machine as in Example 1, the resulting fabric had a density of 250 yarns / inch.
The weft density was 80 yarns / inch, the sum of the warp and weft cover factors was 2957, and the titanium oxide content was 1.25.
The weight%, the porosity was 0.1%, the thickness was 0.26 mm, and the apparent density was 0.53 g / cm ³ . The woven fabric was very good in both the ultraviolet shielding property and the anti-transparent property, but had a hard texture.

[0034]

Comparative Example 7 A core made of polyethylene terephthalate fiber containing no titanium oxide in the warp (84 decitex 36 filaments), a polyethylene terephthalate containing 8.0% by weight of titanium oxide in the weft, and a polyethylene containing no titanium oxide. A high-density flat tissue greige made of concentric polyethylene terephthalate / polytrimethylene terephthalate core-sheath type synthetic fibers (84 decitex 36 filaments) composed of a sheath portion made of trimethylene terephthalate and having a core-sheath weight ratio of 1/1. I got The obtained greige was desizing and scouring with a continuous scouring machine, and after presetting at 160 ° C. with a pin tenter type dry heat treatment machine, dyeing was performed at 130 ° C. with a liquid jet dyeing machine, followed by 170 ° C.
And finished by dry heat setting. The warp density of the obtained woven fabric is 130 yarns / inch, the weft density is 130 yarns / inch, the sum of the cover factors of the warp and the weft is 2383, the titanium oxide content is 2.09% by weight, and the porosity is 0. .2%,
The thickness is 0.16 mm and the apparent density is 0.71 g / cm ³
Met. The woven fabric was very good in both the ultraviolet shielding property and the sheer-proofing property, but had a hard texture.

[0035]

[Table 1]

[0036]

The light-shielding woven fabric according to the present invention is a thin, lightweight, soft-textile woven fabric that is excellent in light-shielding properties such as light-shielding properties and ultraviolet light shielding properties.

Claims (1)

[Claims] 1. A woven fabric composed of polytrimethylene terephthalate fiber, wherein the woven fabric has a porosity of 3% or less, a thickness of 0.25 mm or less, and an apparent density of 0.7 g / cm ^3.
The light-shielding fabric according to claim 1, wherein the fabric contains inorganic oxide fine particles in an amount of 1.0% by weight or more.