JP2003138446A - High density thin woven fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high density thin woven fabric made of cellulose spun yarns, which has specific physical properties, does not have such a glaring appearance and slipperiness as polyester multi-filaments and dry and rough touch like cotton, has a natural appearance and gloss, is soft and lightweight, and is down-free. SOLUTION: This soft and lightweight high density thin woven fabric scarcely blowing out the down contains regenerated cellulose fibers in an amount of 43% to 63%, has a warp-weft cover factor total CF: 2,600>=CF>=2350, and comprises (A) polynosic or lyocell spun yarns preferably having a single filament fineness of <=1.4 dtex and (B) polyester multi-filaments having a single filament fineness of <=0.8 dtex.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention: Soft and free from the feeling of dryness and firmness of cotton, glare of polyester multifilament, non-slip, natural appearance and luster, and no inner bag to prevent blowing down. The present invention relates to a lightweight regenerated cellulose-based high-density thin fabric that can be used in.

[0002]

2. Description of the Related Art A cotton fabric is generally used as a down proof fabric used for outerwear and futon side cloths.
On the other hand, in recent years, ultra-fine polyester multi-filaments, nylon multi-filaments, or their composite synthetic fiber materials, which have excellent functionality in terms of softness, light weight, wind resistance, high water repellency, high robustness, etc., are coated, blouson, golf, outdoor. It is often used for clothing. However, in the case of multifilament, the surface of the fabric is smooth due to its uniformity and denseness, and the metallic finish and slimy feel cannot be wiped off from the finished surface, and it lacks a natural fabric appearance. In some cases, the dough tends to slip off during sleep.

Further, although it is easy to obtain a thin and lightweight woven fabric due to its compactness, it also has the drawback that the fabric is easy to get close to and the down and feathers are likely to protrude from the fabric. Polyester spun yarn fabric can express a natural fabric appearance,
In general, fine denier of 0.8 dtex or less has poor spinnability, and swelling of spun yarn can be obtained, but it is difficult to obtain a soft texture comparable to that of multifilament. There has been a strong historical demand for cotton, especially for futon side fabrics. By adding mercerizing to fine count fabrics, it is possible to make soft fabrics rich in gloss and color. However, in terms of texture, the peculiar dryness and firmness and waist feel of cotton remain, and although the texture has been improved by soft cloth treatment, etc., the soft texture that is comparable to that of ultrafine multifilament fabric is not obtained. Is the actual situation.

On the other hand, an attempt has been made to use rayon spun yarn for the purpose of improving the feel of cotton or polyester spun yarn. However, although the hand feel is improved softly, the rayon yarn stretches at the time of washing and after washing. The air permeability and the shrinkage factor of washing were remarkably lowered, and the down easily blown out, which was completely impractical. Further, even when the fiber was not washed, the air permeability was severely lowered due to repeated absorption and drying of the fiber, resulting in lack of durability. Further, the resin processing for imparting morphological stability markedly impairs the feel and reduces the strength of the dough, so that it has not been mass-produced. For this reason, in order to obtain the soft texture peculiar to rayon, it was necessary to use an inner bag for wrapping down to prevent blowing down. However, this method increases the cost of the product, further increases the weight of the entire futon, and impairs comfort at bedtime. From such a background, there is no jarring feeling peculiar to cotton,
There was a need for a thin, lightweight, high-density fabric that is soft and has excellent comfort at bedtime.

[0005]

PROBLEM TO BE SOLVED BY THE INVENTION It is intended to provide a soft and lightweight high-density thin article having a natural appearance and luster without the glare and slippage of a polyester multifilament and the dryness of cotton.

[0006]

[Means for Solving the Problems] In view of such a background,
As a result of earnest research, the present invention has been achieved. That is, 1. A woven fabric containing raw cellulose fibers (A) in an amount of 43% or more and less than 63%, a fabric weight of 110 g / cm ² or less, and a drape coefficient of less than 0.355, and the air permeability after one washing of the woven fabric is At less than 3.00 cc / cm ² / sec
A high density thin fabric, 1. 1. As regenerated cellulosic fiber (A), the fiber strength in a wet state is 2. 5cN / dtex or more, elongation 15.0
% Or less, elongation under 0.5 cN / dtex weight is 4.0% or less, and wet stress at 5% elongation is 0.9 cN / dtex or more.
2. High density thin fabrics characterized by using fibers, in particular polynosic fibers or lyocell fibers. The sum of the cover factors of the warp and the weft of the woven fabric represented by the following formula is 2350 or more and less than 2600, and
High density thin fabric, characterized in that the finish density of the weft of the woven fabric is equal to or higher than that of the warp, (Equation 1) cover factor CF == warp density (book /
(Inch) x (warp yarn) ^0.5 + weft density (pieces / inch) x (weft fineness) ^0.5 Spindle count is converted to decitex. The present invention consists of:

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. Regenerated cellulosic spun yarn (A): Among regenerated cellulosic fibers, the fiber strength in the wet state is 2.5 cN / dtex or more, the elongation is 15.0% or less, and the elongation under 0.5 cN / dtex excess weight. 4.0% or less, wet stress at 5% elongation 0.9 cN /
A regenerated cellulosic fiber having characteristics of dtex or more is used. In particular, polynosic fibers specified by the Household Goods Quality Labeling Law, or liocell fibers which are non-designated fibers are suitable. In the present invention, in order to reduce the weight, English cotton count 50 or more,
Preferably, fine count spun yarn of 55 count or more is required.
Therefore, the single yarn fineness is 1.4 dtex or less, which is good in spinnability, preferably 1.2 dtex or less, and more preferably 1.1 dtex or less. Especially in high-grade counts such as 80 count, the number of spun yarn components constitutes strength and grade, and weavability and fabric quality are affected. Further, it is preferable in terms of soft feeling and air permeability. When the single yarn denier is 1.5 dtex or more, the fine count spinnability and weavability are deteriorated, and it becomes impossible to obtain a high-quality lightweight thin fabric. As a result, the air permeability that regulates the down blowing prevention performance cannot be obtained. These spun yarns (A) are used for one of the warp yarn and the weft yarn in order to obtain a natural fabric appearance, a glossy feeling, and a soft feeling. Due to the difference in fiber manufacturing method, rayon has a unique atypical cross-sectional shape, but the fiber of the present invention generally has a round cross-sectional shape, and is characterized in that it can provide a more silky luster and high color development.

The weight ratio of the regenerated cellulosic fiber (A) in the fabric is 43% or more and less than 63%. If it is less than 43%, the effect of the material to be interwoven, especially the polyester fiber is exerted strongly, so that the natural appearance of the regenerated cellulosic fiber and the soft texture with some resilience cannot be obtained. When it is 63% or more, the dimensional change of the regenerated cellulosic fiber with time becomes large and the down-blowing prevention property is poor, which is not preferable.

The fiber (B) interwoven with the regenerated cellulose fiber (A) is preferably polyester because of its dimensional stability and transpiration property. Compared with the multifilament yarn, the polyester spun yarn has a rough texture, and needs alkali weight reduction to prevent pilling, which is disadvantageous because it impedes densification. However, it is preferable to use a mixed yarn of polyester and regenerated cellulosic fiber, in which case the regenerated cellulosic fiber content in the yarn is 50% or more,
It is desirable to soften the texture.

The use of polyester multifilament yarn as the fiber (B) yarn to be interwoven is most preferable in terms of softness, light weight, dimensional stability, air permeability and the like. In that case 80 dt
A polyester multifilament yarn having an ex or less and a single yarn fineness of 1.0 dtex or less, preferably a false twisted yarn thereof is used. If it is 80 dtex or more, the fabric becomes thick and the weight becomes lighter, which is not preferable. It is preferably 70 dtex or less. The single yarn fineness is 1.0 dtex or less, preferably 0.8 dtex or less, and more preferably 0.6 dtex or less. When it is 1.0 dtex or more, the texture is hardened and the air permeability is hard to be obtained. (B) The yarn may be used for both warp and weft. When polyester multifilament yarn is used for weft, the natural appearance, luster and texture of the warp (A) can be emphasized, and its strength when used. Fine denier yarn can be easily used. As a result, the warp yarn breakage is small, so that the weavability is good, and a thin, soft and lightweight woven fabric can be easily obtained. The mixing ratio of polyester is 70% or less in order to obtain a soft texture. If the amount is more than the above value, the polyester fiber that has been subjected to the pressing heat treatment step for obtaining the air permeability gives a metallic luster and the texture is further hardened, which is not preferable.

Regarding the fabric weight, the down futon side material generally has a large satin structure, and the weight thereof is often 130 g /
m ² or more. It is considered that the satin structure is often used because it is easy to obtain the luster of the cloth and it is advantageous in the down-blowing prevention property due to the thickness of the cloth. In the present invention, it is 110 g / m ² or less, preferably 108 g / m ² or less, more preferably 104 g / m ² or less. Therefore, the structure may be a twill, but the flat structure is more suitable in terms of lightness and cost.

In order to improve the down blowing property, the cover factor CF represented by the following equation is set to 2350 or more and 2600 or more.
Less than It is preferably 2360 or more and less than 2560. When the CF is less than 2350, the soft feeling is obtained, but the down-blowing prevention property is poor, which is not preferable. Conversely, 26
When it is 00 or more, the hard feeling and the weight increase, which is not preferable. (Equation 1) Bar factor CF == warp density (book / inch) x
(Warp yarn) ^0.5 + Weft density (book / inch) × (weft fineness) ^0.5 However, the spinning count shall be the decitex conversion value.

At this time, the yarn having the finishing density of the weft of the woven fabric equal to or higher than that of the warp and the density constitution are
It is a preferred method of obtaining the lightweight, soft and low air permeability effect of the present invention. When a regenerated cellulose-based spun yarn is used for the warp and a polyester multifilament is used for the weft, there is a limit to the fineness of the spun yarn, but with the multifilament, a fine-fineness yarn can be obtained more easily than the spun yarn, and This is because, since it can be used in a non-twisted yarn, or a yarn form in a state close to a non-twisted yarn in the form of a sweet twisted yarn or a weakly entangled yarn, it is easy to impart flexibility to a woven fabric. Further, it also has the effect of increasing the mixing ratio of the polyester, stably maintains the fabric structure restraining force with time, and contributes to lowering the air permeability.

The fabric of the present invention has a permeability of 3.00 after washing.
It is less than cc, preferably less than 2.70 cc. In the case of a lightweight thin fabric, if the air permeability after washing is 3.00 cc or more, the fabric dimensions may change due to physical rubbing during use as a product, moisture absorption of cellulosic fibers, repeated drying, etc. The tissue restraining force is lowered, and the down comes out to the surface of the cloth, which is not preferable. Therefore, the initial air permeability of the cloth is preferably 1.00 cc, preferably 0.90 cc or less. Above this, it means that after a short period of use the down will come out of the fabric surface. Therefore, in order to improve durability as in the present invention, it is important that the air permeability of the cloth before and after washing is low and stable.

In the present invention, the calender heat treatment after finishing does not harden the polyester texture because the densification improves the air permeability but impairs the texture.
It may be set at 0 ° C. or lower), and may be subjected to alkali weight reduction treatment of several%, enzyme weight reduction, or napping during or after the soft cloth treatment with a jet dyeing machine or the like. It is also effective to add a softening agent and to finish the fabric with soft cloth such as sanforize or cam fit. The drape coefficient of the fabric is preferably less than 0.355, more preferably less than 0.350. If it is more than that, it becomes hard and the fabric becomes thick, which is not preferable.

The high-density thin fabric obtained by the present invention has other conventional uses such as down-proof fabrics for futon side cloths, coats, blouson, golf, outdoor wear, etc. that take advantage of windproof property, flexibility, and lightness. It can also be used for ladies' clothing such as blouses, jackets, skirts, etc. that take advantage of the drape texture and lightness, and nightwear.

EXAMPLES The present invention will be described below with reference to examples. Evaluation method: Air permeability JIS L1096-1999-A
Method (Fragille method) Washing method JIS L 0217-1995-103 method Drying method after washing JIS L 1096-1999-line dry drape coefficient JIS L 1096-1999-G method (drape coefficient) Table 1. Physical properties of raw cotton and spun yarn count of regenerated cellulose fiber (A) used in Examples and Comparative Examples

The raw cotton and spun yarn shown in Table 1 were used and woven with the yarn constitution and raw machine density shown in Table 2. After the desizing and scouring relaxation of the fabric with a jet dyeing machine for 30 minutes at 80 ° C, the polyester-containing fabric was subjected to a 2% alkali weight reduction and then at 180 ° C.
A 30 second dry heat setting was performed. Next, disperse dyeing was performed at 130 ° C. for 20 minutes using a high-pressure jet dyeing machine, and subsequently, reactive dyeing was performed at 60 ° C. for 20 minutes. After that, a 600-mesh raising process was performed, and then a finishing process was performed. Then, calendar finishing was performed at a temperature of 130 ° C., a pressure of 40 tons and a cloth speed of 12 m / min. The density, mixing ratio of those doughs,
Shows areal weight, texture, drape coefficient, air permeability, and overall judgment result
Shown in 1.

[0019]

[Table 1]

In the evaluation of air permeability, as the actual down proof futon side material according to Example 2 and Comparative Examples 1 and 2, 1
From the results of the 6-month use test evaluation by 0 people, the down blow prevention performance (the number of blow down feathers is not
Or, the air permeability of a plain woven fabric having a small amount is 3.00 cc /
It was grasped and evaluated that it was less than cm ² / sec.

As can be seen in Examples 1-5 and Comparative Example 1,
It is necessary to set the initial air permeability of plain weave to be lower than that of satin. It is presumed that this is because the swelling of the fibers during washing and the large shrinkage due to drying move the texture points of the fabric and reduce the air permeability. It is presumed that Comparative Example 4 has a higher wet elongation, so that dimensional changes due to washing and drying are large, and voids are easily generated in the fabric. In Comparative Example 5, the down-blowing prevention performance was excellent, but the texture was such that the bulkiness peculiar to cotton did not disappear, and the drape coefficient was poor. In Comparative Example 7, the metallic luster of the polyester was conspicuous, the natural appearance was lost, and the texture was firm. Comparative Example 6
Was heavy, had a hand-holding feeling similar to that of the satin of Comparative Example 1, and was inferior in lightness. In comparison with these, all of the examples showed excellent feeling, light weight, and excellent down-blowing prevention property.

[0022]

[Table 2] Note 1) Po is "Tough cell" manufactured by Polynosic Toyobo Co., Ltd.
, E is polyester false twisted yarn, 78T is 21
6f (= 0.36 dtex / f), 55T is 144f (= 0.3
8 dtex / f). Ry represents HWM (high wet modulus) rayon, and CF represents cover factor. Note 2) In terms of number conversion, 80 'is 73.7 dtex, 60' is 9
8.3 dtex and 40 'are 147.5 dtex. Note 3) The unit is density / book, air permeability is cc / cm ² /
Represents seconds. Note 4) The weft of Comparative Example 7 is polynosic 1.1T38mm35
% And polyester 1.2T 38mm 65% mixed yarn Note 5) The overall judgment is based on the following criteria. ○ Good texture, air permeability and light weight △ Good texture, air permeability but heavy × Poor air permeability, texture, glossy surface × × Remarkably poor air permeability

[0023]

EFFECTS OF THE INVENTION According to the present invention, it has a soft and silky luster like cotton, but lacks morphological stability. Therefore, it is provided only for the coarse and fine futon side which requires a middle bag. New practicality could be given to the regenerated cellulosic fiber which did not exist. That is, without using a special resin agent for imparting morphological stability while using regenerated cellulosic fibers, and thus without impairing the soft feeling, to define the fiber material used and the textile standard within a specific range. It realized the weight reduction and the down-blowing prevention performance. As a result, it became possible to eliminate the need for an inner bag, and to obtain a thin high-density fabric with excellent sleep comfort.

Claims (5)

[Claims] 1. A woven fabric containing a regenerated cellulosic fiber (A) having a fabric weight of 110 g / cm ² or less and a drape coefficient of less than 0.355 in an amount of 43% or more and less than 63%, and the woven fabric is washed once. Air permeability after is 3.00cc / cm ² /
A high-density thin textile fabric characterized by being less than a second. 2. A regenerated cellulose fiber (A) is used,
Fiber strength in wet condition is 2.5 cN / dtex or more, elongation is 15.00% or less, elongation under 0.5 cN / dtex weight is 4.0% or less, 5% wet stress at elongation 0.9 cN / Dtex or more, The high-density thin fabric according to claim 1, wherein 3. The high density thin fabric according to claim 1, wherein the regenerated cellulosic fiber (A) is a polynosic fiber or a lyocell fiber. 4. The high-density thin fabric according to claim 1, wherein the sum of cover factors of the following (formula 1) of the warp and the weft of the fabric is 2350 or more and less than 2600. (Formula 1) Cover factor CF = warp density (book / inch)
× (warp yarn) ^0.5 + weft density (book / inch) × (weft fineness)
^0.5 Spinning count shall be decitex conversion value. 5. The high-density thin fabric according to claim 1, wherein the finishing density of the weft of the woven fabric is equal to or higher than that of the warp.