JP2015067915A - Knitted fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a knitted fabric excellent in anti-pilling properties, burst strength and abrasion strength while being a knitted fabric which is formed of short fibers, and which is thin, has a soft feel and is excellent in elasticity.SOLUTION: A knitted fabric is formed of: a blended yarn obtained by blending high wet modulus rayon short fibers A and solvent-spun cellulose short fibers B subjected to anti-fibrillation treatment at a stage of raw stock; and a polyurethane yarn C. In the blended yarn, the high wet modulus rayon short fibers A and the solvent-spun cellulose short fibers B are blended in a mass ratio of A:B=55:45 to 70:30, and an average fluff index of 3 mm or more is 40 pieces/10 m or less. The knitted fabric has a basis weight of 150 g/mor less and 100 g/mor more, and is formed of a bare plain stitch structure knitted by using a single needle bed of 32 gauges or more and 46 gauges or less. In the knitted fabric, an elongation recovery rate in a weft direction is 90% or more.

Description

  The present invention relates to a knitted fabric.

  For example, as a material for ladies' innerwear, knitted fabrics using viscose rayon short fibers characterized by soft skin-friendly texture and high moisture absorption / release properties have been put on the market. However, while viscose rayon short fibers have a unique soft texture, high color development and drape, they have low strength (especially reduced strength when wet) and are prone to fluffing, so pilling is likely to occur when worn. There are challenges. In other words, knitted fabric using viscose rayon short fibers is an inner material that is becoming thinner and lighter in recent years, and it has strong resistance to resin processing for the purpose of holding strength when thinning and suppressing pilling. There was a problem.

  In order to compensate for the viscose rayon defects, high-wet modulus rayon short fiber material (for example, “Modal (registered trademark)” manufactured by Lenzing) that increases the molecular weight of the fiber and improves the wet strength is harmful in the manufacturing process. Solvent-spun cellulose fibers (such as “Tencel (registered trademark)” and “Lyocell (registered trademark)”) that can be produced in a completely closed system without using chemicals, and “Modal” and solvent-spun cellulose short fibers “Lyocell LF” "Proviscose (manufactured by Lenzing Co.)", which is a blend of "and", has been put on the market as a material aimed at improving strength without impairing the unique soft texture.

  Among them, especially women's inner material using modal has a lower Young's modulus than lyocell and tencel, and its soft texture based on it has been evaluated and is used in many items. In response to the recent demand for thinner inner materials, materials mainly made of tencel and lyocell have been developed and proposed, but the absolute difference in texture from the difference in Young's modulus with modal is obvious, therefore There is a demand for thinning with the modal texture. In spite of this, however, the current situation is that there are not enough women's inner products developed using Modal's finer count, centering on the issue of strong raw cotton.

  As a technique for supplementing the strong side of the modal, a technique for reinforcing the modal short fiber by blending with the ester short fiber or covering with a filament such as ester or nylon has been proposed. However, in these measures, the dyeing properties of modal fibers and other fibers are different, so both bath dyeing methods are required, which increases the number of steps in dyeing and increases the cost of products. It will be. In particular, blending with short ester fibers has the drawback that pilling is significantly reduced. In addition, there is a problem with the cover ring, such as an increase in cost due to the addition of the twisting process, and the need to prepare extra-fine yarn for the spun yarn and filament when making a fine count, leading directly to higher costs. is there. Above all, in supplementing the powerful aspects of modal with other materials, the current situation is that the soft texture of modal is impaired and the original goodness of modal is not fully utilized.

  In addition, in recent years, it has become essential to provide stretchability for ladies' inner use, and polyurethane knitting materials are frequently used. In addition, as a material structure, a bare tengu structure suitable for thinning is often used. In order to further reduce the thickness of the polyurethane knit material, it is becoming essential to use a spun yarn having a fine count of 70/1 or higher. In order to knit the fine yarn spun yarn with an appropriate gauge, the conventional 28 gauge is inappropriate, and it is necessary to select a high gauge knitting machine of 32 gauge or more. However, in order to stably knitting a bare tengu structure of 32 gauge or more with spun yarn, it is necessary to suppress yarn uniformity and fluff, and above all, sufficient yarn strength is required. For this reason, with a modal 100% spun yarn, stable knitting is difficult due to insufficient strength.

  In the obtained bare tempura fabric, when resin processing is performed to give anti-pilling properties by post-processing, not only the strength of the fabric itself decreases due to it but also the loss of fibers due to wear (blown phenomenon) Occurs and the physical properties of the dough are greatly impaired.

As a thin knitted fabric using cellulosic fibers, we knitted raw yarn made of semi-synthetic fiber filament yarn (triacetate) made of cellulose and polyester filament into air-mixed yarn into a 36G tense structure, making it hygroscopic A thin knitted fabric having an easy-care property and a basis weight of 100 g / m ² or less has been proposed (Patent Document 1). However, since the main material is filament, it is unsuitable as a ladies inner that places an emphasis on the texture, and is not far from the texture and comfort unique to short fiber spun yarn that Modal has.

In addition, as a thin inner material using short fibers, a long and short composite yarn of cotton counts 60 to 120 in which a synthetic multifilament and an acrylic short fiber are combined at the spinning stage is knitted, and the basis weight is 150 g / m ^2. The following thin knitted fabric has been proposed (Patent Document 2). However, the short fibers used are acrylic short fibers, and the texture is soft, but there is no hygroscopic property unique to cellulose fibers, and the material is fundamentally different from the modal material.

JP 2011-231416 A JP 2011-219886 A

  The present invention eliminates the disadvantages of the prior art as described above, is composed of short fibers, has a soft texture with a thin fabric, and is excellent in stretchability, and has anti-pilling properties. The technical challenge is to provide a knitted fabric with excellent bursting strength and abrasion strength.

  The present inventor blended high-wet modulus rayon short fibers and solvent-spun cellulose short fibers, which were processed to prevent fibrillation at the raw cotton stage, at a constant ratio that makes the high-wet modulus rayon short fibers rich. We found that the above problems can be solved without impairing the texture of the modal by spinning fine yarns spun by compact spinning spinning and knitting it with a bare high-strength structure of 32 gauge or higher single high gauge. did.

That is, the present invention is a knitted fabric,
It is composed of a blended yarn obtained by blending a high-wet modulus rayon short fiber A and a solvent-spun cellulose short fiber B subjected to antifibrillation treatment at the raw cotton stage, and a polyurethane yarn C.
In the blended yarn, the blend ratio of the high wet modulus rayon short fiber A and the solvent-spun cellulose short fiber B is A: B = 55: 45 to 70:30 by mass ratio, and the average fluff index of 3 mm or more is 40 pieces. / 10m or less,
The knitted fabric has a basis weight of 150 g / m ² or less and 100 g / m ² or more, and is composed of a bare tentacle structure knitted with a single needle bed of 32 gauge or more and 46 gauge or less. The gist is characterized by a knitted fabric having a recovery rate of 90% or more.

  The knitted fabric of the present invention is a thin knitted fabric having excellent anti-pilling property, bursting strength, abrasion strength, and stretch properties while fully utilizing the soft texture peculiar to the high wet modulus rayon staple fiber A (modal). is there. The knitted fabric of the present invention is particularly suitable for ladies inner use.

  The high-wet modulus rayon fiber in the present invention is described in, for example, Japanese Patent No. 4886368, and has a tensile strength per decitex required to elongate a single fiber by 5% is 0.5 cN or more. . The short fiber of this fiber means that this fiber is cut into a finite fiber length in accordance with the desired fiber length as a spun yarn. As such a high wet modulus rayon short fiber A, the above-mentioned “modal” developed by Lenzing Co. can be mentioned. In order to reduce the fine count, a single yarn fineness of 0.1 to 1.5 dtex and a fiber length of 10 to 50 mm are preferably used.

  The solvent-spun cellulose short fiber B in the present invention is a modified raw cotton that has been subjected to anti-fibrillation processing at the raw cotton stage, and preferably has a single yarn fineness of 0.1 to 1.5 dtex and a fiber length of 10 to 50 mm. Used. Examples of such short fibers include the above-mentioned “Lyocell”.

  As the spun yarn, that is, the blended yarn in the present invention, one having a thickness of 70 to 100 is preferably used. If the thickness of the yarn becomes thicker than 70, the knitted fabric becomes thick and it becomes difficult to obtain a product that meets the demand for thinning. On the other hand, when it becomes thinner than 100, the tensile strength of the yarn and the bursting strength of the knitted fabric are lowered.

  In the blended yarn of the present invention, the high-wet modulus rayon staple fiber A and the solvent-spun cellulose staple fiber B subjected to antifibrillation treatment at the raw cotton stage are mixed at a mass ratio of A: B = 55: 45 to 70. : Spun yarn blended to be 30 must be used.

  That is, in the blended yarn in the present invention, solvent-spun cellulose fibers are blended while mainly using high wet modulus rayon. The solvent-spun cellulose fiber needs to be processed to prevent fibrillation at the raw cotton stage.

  The blended yarn in the present invention is obtained by blending the high-wet modulus rayon staple fiber A and the solvent-spun cellulose staple fiber B processed to prevent fibrillation at the raw cotton stage as described above. However, this alone is only an improvement in the single yarn strength of the spun yarn without sacrificing the texture as compared with the high-wet modulus rayon 100% spun yarn, and it has a bursting strength, abrasion strength, and anti-pilling property. A thin knitted fabric having excellent stretchability cannot be obtained.

  Therefore, in order to obtain the desired knitted fabric, the present inventor made not only the fiber type and blend ratio of the blended yarn, but also the comprehensive fabric design of selecting the spinning method, the knitting structure to be knitted, and the optimum conditions of the knitted fabric The inventors have found that the desired knitted fabric can be obtained, and have completed the present invention.

  That is, in the knitted fabric of the present invention, in a knitted fabric composed of a blended yarn of a high wet modulus rayon staple fiber A and a solvent-spun cellulose staple fiber B subjected to an antifibrillation treatment at the raw cotton stage, It is important not only to make the ratio A: B = 55: 45 to 70:30 by mass ratio, but also to reduce the fluff on the surface of the blended yarn in order to enable stable knitting with a high gauge knitting machine. is there. Specifically, it is important to set the average fluff index of 3 mm or more to 40/10 m or less. If the average fluff index of 3mm or more exceeds 40 / 10m, the needle will be damaged by the generation of fluff and fluff when knitting on a high gauge knitting machine, and the knitted fabric will be stable due to the occurrence of warp and needle breakage. It becomes difficult to obtain. As a method for setting the average fluff index of the blended yarn low, a spinning method using a compact spinning machine is effective. With this method, the target blended yarn of 70 to 100 count can be stably produced while suppressing fluff, and the binding force between fibers is improved. Compared to yarn, it can be improved by 10-15%.

  In addition, the knitted fabric knitted with the blended yarn obtained by this method is anti-pilling, even if the anti-pill resin processing that is normally required in the post-processing of the fabric stage is omitted, derived from the effect of suppressing fluff. Excellent in properties. Anti-pill resin processing by post-processing at the dough stage is a processing content that reduces the burst strength of the dough by about 10% and also reduces the wear strength. Therefore, in the functional knitted fabric of the present invention aiming for both thinning and strong holding, the effect of omitting this processing is great.

  Thus, in the present invention, it is possible to achieve the suppression of the fluff of the fine yarn blended yarn obtained by the method of blending the solvent-prevented cellulose short fiber B subjected to the fibrillation prevention processing at the raw cotton stage and the spinning method of compact spinning. it can. And by the synergistic effect of this fluff suppression method and the single yarn strength improvement method by using mixed yarn, while making the best use of the texture of high wet modulus rayon, it is thin and has few fluff and strong single yarn strength. Therefore, it is possible to obtain a blended yarn differentiated from a conventional spun yarn that can be stably knitted even on a high gauge knitting machine.

  As a spinning method for suppressing fluff, there is vortex spinning by MVS (Murata Vortex Spinning). However, this spinning method is a method that is difficult to achieve a fine count, which is the object of this time, and has a drawback that the spun yarn has a rough and rough texture as a structural characteristic of the spun yarn. Therefore, it is not appropriate to apply to the present invention.

  The knitted fabric of the present invention uses such a blended yarn, and this blended yarn can be stably knitted with a high gauge bear tentacle knitting machine while being a fine count, and the knitted fabric is a thin fabric. However, it has excellent anti-pilling properties and at the same time, excellent wear resistance and bursting strength. The knitted fabric of the present invention uses the above-mentioned blended yarn and polyurethane yarn C as constituent fibers, but yarns other than these may be included. However, as the blended yarn content decreases, the effects peculiar to the present invention tend to decrease. Therefore, the blended yarn is preferably contained in an amount of 50% by mass or more, and is contained in an amount of 90% by mass or more. Is more preferable.

As the polyurethane yarn C contained in the knitted fabric of the present invention, a general polyurethane yarn available on the market can be used, and thereby a required elongation recovery rate can be achieved.
The basis weight of the knitted fabric of the present invention is required to be 150 g / m ² or less and 100 g / m ² or more. If it exceeds 150 g / m ² , it is not possible to obtain a thin knitted fabric that is the object of the present invention, and if it is less than 100 g / m ² , it is not possible to obtain the intended bursting strength or wear strength of the present invention. It is. The basis weight is measured by the method A described in 8.3.2 of JIS L1096.

The knitted fabric of the present invention exhibits an excellent function by the total fabric design of raw cotton selection, blend ratio, spinning technique, knitting machine, and knitting structure selection as described above.
In the present invention, the method B described in 9.22.2 of JIS L1095 is adopted as a method for measuring the above average fluff index. Specifically, a parallel light beam in one direction perpendicular to the blended yarn is applied, and an image of the fluff is projected on a shielding plate installed on the side opposite to the light source when viewed from the blended yarn. Corresponds to the fluff index. As the measurement, an F-INDEX tester (manufactured by Shikishima Boseki Co., Ltd.) is used to measure 30 times with a sample length of 10 m, and the average value is taken as the average fluff index.

  In the present invention, for the anti-pilling property described later, method A (method using an ICI type tester) described in 8.1 of JISL 1076 is adopted as the measurement method. Specifically, the knitted fabric is put into an ICI type testing machine for 5 hours and graded according to the description of 9.2 of JIS L1076, and the grade judgment value is defined as anti-pilling property in the present invention.

  In the knitted fabric of the present invention, the anti-pilling property is preferably tertiary or higher, more preferably quaternary or higher. When the anti-pilling property is lower than the third grade, pilling appears on the surface of the knitted fabric as it is repeatedly worn and washed as a garment, and the garment tends to be unable to be used comfortably and functionally.

  In the present invention, for the wear strength described later, the E method (Martindale method) described in 8.17.5 of JIS L1096 is adopted as the measurement method. The pressing load is 9 kPa.

  The abrasion strength is preferably 6000 times or more, and more preferably 10,000 times or more. The knitted fabric of the present invention is a bare tengu structure excellent in stretchability, and adheres to the skin in a state where the fabric is stretched when worn. When the frictional action is repeatedly received in this state, if the wear strength is less than 6000 times, only the spun yarn constituting the surface yarn falls off and only the polyurethane yarn remains, and the fabric appearance is improved. Big loss.

  In the present invention, the method A (Murlen form method) described in 8.17.1 of JIS L1018 is adopted as the measurement method for the bursting strength described later. Low pressure rubber is used as the rubber film. In the knitted fabric of the present invention, the bursting strength is preferably 250 kPa or more. If the bursting strength is less than 250 kPa, the fabric may be cracked or torn during repeated wearing and washing as clothes.

  In the present invention, the elongation recovery rate in the weft direction, which will be described later, is measured by a method based on JIS L1018, and a constant speed extension type tensile tester is used at that time. A test piece of 2.5 cm × 16 cm was prepared, and attached to a constant speed extension type tensile tester with an upper grip length of 2.5 cm, a lower grip length of 3.5 cm, and a grip interval of 10.0 cm, 30 cm ± 2 cm / min The recovery rate is measured when the elongation rate is 80%. Based on the measurement results, the elongation recovery rate is evaluated according to the following criteria.

○: Elongation recovery rate of 90% or more X: Elongation recovery rate of less than 90% Regarding the washing durability of the obtained knitted fabric, after washing 30 times according to JIS L0217 method 103, the appearance change and texture change of the knitted fabric First, visual observation and handling evaluation by touching with fingers are performed, and evaluation is performed according to the following criteria.

[Appearance change]
◯: Fluff is not noticeable △: Fluff is found a little ×: Fluff is much [Change in texture]
◯: Softness and slipperiness are good Δ: Softness and slipperiness are normal ×: Softness and slipperiness are poor Next, an example for obtaining the knitted fabric of the present invention will be described.

  The knitted fabric of the present invention basically includes a process for preventing fibrillation of solvent-spun cellulose fibers, a process of blending high wet modulus rayon staple fibers and solvent-spun cellulose staple fibers, and reducing the fuzz of the blended yarn. A process, a process of knitting using blended yarn, and a process of finishing as a fabric by processing can be obtained in this order.

  First, as a process for preventing fibrillation of a solvent-spun cellulose fiber, for example, using a package dyeing machine as a processing apparatus, a solvent containing a compound having a chlorohydrin group or a glycidyl group and a reaction accelerator in a processing bath is used. The spun cellulose fiber may be immersed and stirred. Specific processing conditions vary depending on the input amount of fiber, the apparatus used, the stirring speed, and the like, but the processing time is preferably 10 to 90 minutes. When the processing time is 10 minutes or less, it is difficult to obtain a sufficient fibrillation preventing effect. On the other hand, if it exceeds 90 minutes, the cross-linking reaction with the fiber molecules is almost completed, so that it is difficult to expect a further effect of preventing fibrillation. As processing temperature, 40-100 degreeC is preferable and 60-100 degreeC is more preferable. If the processing temperature is less than 40 ° C., the crosslinking reaction rate tends to be slow. On the other hand, when the processing temperature exceeds 100 ° C., uneven reaction tends to occur.

  In the blending process, the high-wet modulus rayon staple fiber A and the solvent-spun cellulose staple fiber B subjected to antifibrillation treatment at the raw cotton stage are mixed at a mass ratio of A: B = 55: 45 to 70:30. It must be blended as far as possible. When the high wet modulus rayon short fiber A is less than 55% by mass, the original unique soft texture of the material is impaired. Further, when the blended ratio of the solvent-spun cellulose short fibers B subjected to the antifibrillation treatment at the raw cotton stage is less than 30% by mass, the contribution to the improvement of the single yarn strength by the short fibers B becomes insufficient, and the desired physical properties are obtained. It becomes impossible to obtain the knitted fabric.

  A compact spinning system is adopted in the process for achieving both suppression of fuzz of blended yarn and improvement of single yarn strength. The compact spinning system is a kind of ring spinning method, and is a spinning method that provides an air suction type convergence mechanism in the transition region from draft to twisting. According to this fine spinning method, the degree of parallelism and accumulation of fibers can be improved, so that a dense spun yarn with less fluff can be formed. As spinning conditions, not only compact spinning, but also combined with fine spinning and twisting technique, it becomes possible to further improve fluff suppression and single yarn strength.

  And in the process of knitting using the blended yarn, the knitting may be carried out using a known circular knitting bare tenter knitting machine. However, it is necessary to select a 32-46 gauge single bear tentacle knitting machine in order to knit fine count yarn. If the needle density is less than 32 gauge, the fiber density of the knitted fabric is reduced, and it becomes unsuitable because it easily loses its shape when used as a garment. On the other hand, if it exceeds 46 gauges, extremely thin spun yarn must be used, which hinders knitting properties and makes it difficult to satisfy physical properties such as sufficient strength as a fabric. The structure of the knitted fabric must be a bare tengu structure that has appropriate stretchability and can be thinned. As an example of the dyeing process, there is a technique in which presetting, low-concentration alkali treatment, scouring / relaxation, liquid dyeing with a reactive dye, finishing set, and incidental treatment are performed in this order. Ancillary treatment is processing to change the color development and texture of the knitted fabric, or to add functionality to the knitted fabric. For example, fix agent treatment, softener treatment, antibacterial agent treatment, deodorant treatment, etc. Processing and so on.

  The knitted fabric of the present invention obtained in this way becomes a comfortable knitted fabric having moderate elasticity while being thin, without impairing the excellent texture unique to the high-wet modulus rayon short fibers. Therefore, the knitted fabric of the present invention is suitable as a ladies inner.

Example 1
A high-wet modulus rayon short fiber A having a single yarn fineness of 0.9 dtex and a fiber length of 34 mm, and a solvent-spun cellulose short fiber B having a single yarn fineness of 0.9 dtex and a fiber length of 34 mm subjected to anti-fibrillation processing at the raw cotton stage, A: B = 60: 40 was blended with a mass ratio of 60:40, and a normal spinning process was applied mutatis mutandis to obtain a fine yarn for fine spinning and twisting. An English cotton with an average fluff index of 3 or more is 15 mm by introducing two rovings obtained at intervals of 2 mm into a ring spinning machine equipped with a compact spinning system and spinning with a twist coefficient of 3.6. A spun yarn with a count of 80/1 (160 / T), that is, a blended yarn was obtained.

Next, using the obtained blended yarn and a 22 dtex polyurethane elastic fiber prepared in advance, a bare tentacle knitting machine having a hook diameter of 34 inches, a needle density of 36 gauge, a total number of needles of 3900 and a number of 102 is used. The machine of the bare tengu structure was obtained by roll-opening with a circular knitting machine. The obtained raw machine was dyed and processed in the order of presetting, low concentration alkali treatment, scouring / relaxation, liquid dyeing with reactive dye, finishing set, fixing agent treatment, and softener treatment. As a result, a bare knitted fabric having an effective width of 155 cm, a basis weight of 145 g / m ² , a knitted fabric density of 76 courses × 53 wales, and an elongation recovery rate of 93% was obtained.

(Example 2)
Compared to Example 1, a difference was obtained in that a spun yarn, that is, a blended yarn, having an average fluff index of 3 mm or more of 16 and an English cotton count of 100/1 (200 / T) was obtained. Otherwise, in the same manner as in Example 1, a bare tentacle knitted fabric having an effective width of 140 cm, a basis weight of 130 g / m ² , a knitted fabric density of 83 courses × 59 wales, and an elongation recovery rate of 94% was obtained.

(Comparative Example 1)
Compared with Example 1, the high-wet modulus rayon short fiber A and the solvent-spun cellulose short fiber B subjected to fibrillation prevention processing at the raw cotton stage were blended at a mass ratio of A: B = 30: 70. I made a difference. Otherwise, in the same manner as in Example 1, an English cotton count 80/1 (160 / T) blended yarn having an average fluff index of 3 mm or more and 5 was obtained. Further, using this blended yarn, a bare woven fabric having an effective width of 155 cm, a basis weight of 145 g / m ² , a knitted fabric density of 76 courses × 53 wales, and an elongation recovery rate of 93% was obtained in the same manner as in Example 1.

(Comparative Example 2)
Compared with Example 1, the high-wet modulus rayon short fiber A and the solvent-spun cellulose short fiber B subjected to fibrillation prevention processing at the raw cotton stage were blended at a mass ratio of A: B = 80: 20. I made a difference. Then, in the same manner as in Example 1, a blended yarn of English cotton count 80/1 (160 / T) having an average fluff index of 16 of 3 mm or more was obtained. In addition, using this blended yarn, a bare knitted fabric with an effective width of 155 cm, a basis weight of 145 g / m ² , a knitted fabric density of 76 courses × 53 wales, and an elongation recovery rate of 94% was obtained in the same manner as in Example 1.

(Comparative Example 3)
Compared with Example 1, the use of a knitting machine having a needle density of 28G and a total number of needles of 2960 was used to adjust the knitting degree. Otherwise, in the same manner as in Example 1, a blended yarn of English cotton count 80/1 (160 / T) having an average fluff index of 15 of 3 mm or more was obtained. Further, using this blended yarn, a bare woven fabric having an effective width of 120 cm, a basis weight of 140 g / m ² , a knitted fabric density of 70 courses × 51 wales, and an elongation recovery rate of 92% was obtained in the same manner as in Example 1.

(Comparative Example 4)
Compared to Example 1, the difference was that a blended yarn having a cotton count of 60/1 was obtained. Otherwise, in the same manner as in Example 1, an English cotton count 60/1 (120 / T) blended yarn having an average fluff index of 3 or more of 16 was obtained. In addition, using this blended yarn, a bare knitted fabric having an effective width of 160 cm, a knitted fabric density of 69 courses × 53 wales, and an elongation recovery rate of 93% was obtained in the same manner as in Example 1. Unlike the knitted fabric of Example 1, this knitted fabric had a basis weight of 160 g / m ² .

(Comparative Example 5)
Compared to Example 1, the difference was that a blended yarn having a cotton count of 140/1 was obtained. Otherwise, in the same manner as in Example 1, an English cotton count 140/1 (280 / T) blended yarn having an average fluff index of 14 of 3 mm or more was obtained. In addition, using this blended yarn, a bare knitted fabric having an effective width of 140 cm, a knitted fabric density of 80 courses × 59 wales, and an elongation recovery rate of 92% was obtained in the same manner as in Example 1. Unlike the knitted fabric of Example 1, this knitted fabric had a basis weight of 90 g / m ² .

(Comparative Example 6)
A high-wet modulus rayon short fiber A having a single yarn fineness of 0.9 dtex and a fiber length of 34 mm, and a solvent-spun cellulose short fiber B having a single yarn fineness of 0.9 dtex and a fiber length of 34 mm subjected to anti-fibrillation processing at the raw cotton stage, A blended yarn having a spinning count of 80/1 with an average fluff index of 48 of 3 mm or more was obtained by ordinary ring spinning without using a compact spinning technique and blending at a mass ratio of A: B = 60: 40.

Next, using the obtained blended yarn and the same polyurethane elastic fiber as used in Example 1, the same treatment as in Example 1 was performed to obtain an effective width of 155 cm, a basis weight of 145 g / m ² , and a knitted fabric density of 76. A bear tengu knitted fabric having a course of 53 wales and an elongation recovery rate of 93% was obtained.

(Comparative Example 7)
Compared to Comparative Example 6, anti-pilling resin processing was added during finish processing. Otherwise, in the same manner as in Comparative Example 6, a blend yarn of spinning count 80/1 with an average fluff index of 56 mm of 3 mm or more was obtained. In addition, using this blended yarn, in the same manner as in Comparative Example 6, a bare sheet knitted fabric having an effective width of 155 cm, a basis weight of 145 g / m ² , a knitted fabric density of 76 courses × 53 wales, and an elongation recovery rate of 93% was obtained.

(Comparative Example 8)
Compared with Example 1, it was different in that the fibrillation prevention processing for the raw cotton of solvent-spun cellulose fibers was omitted. Otherwise, in the same manner as in Example 1, a blend yarn of spinning count 80/1 (160 / T) having an average fluff index of 15 of 3 mm or more was obtained. In addition, using this blended yarn, a bare knitted fabric having an effective width of 155 cm, a basis weight of 145 g / m ² , a knitted fabric density of 76 courses × 53 wales, and an elongation recovery rate of 92% was obtained in the same manner as in Example 1.

(Comparative Example 9)
Compared to Example 1, the knitting structure was changed to a 37 inch, 18 gauge bare milling structure. Otherwise, in the same manner as in Example 1, a blended yarn of English cotton count 80/1 (160 / T) having an average fluff index of 15 of 3 mm or more was obtained. Using this blended yarn, a bare milled knitted fabric having an effective width of 120 cm, a basis weight of 170 g / m ² , a knitted fabric density of 60 courses × 40 wales, and an elongation recovery rate of 95% was obtained in the same manner as in Example 1.

(Comparative Example 10)
Compared to Example 1, the knitting structure was different in that the knitting structure was a 10 inch hook diameter, a needle density of 36 gauge, a total number of needles of 3900, and a number of needles of 102. Polyurethane fiber was not used. Otherwise, in the same manner as in Example 1, a blended yarn of English cotton count 80/1 (160 / T) having an average fluff index of 15 of 3 mm or more was obtained. And using this blended yarn, in the same manner as in Example 1, a tenshi knitted fabric having an effective width of 170 cm, a basis weight of 80 g / m ² , a knitted fabric density of 55 courses × 48 wales, and an elongation recovery rate of 70% was obtained.

  Table 1 shows the characteristic values of the knitted fabrics of the above examples and comparative examples.

  As is apparent from Table 1, the knitted fabric of the present invention is a circular knitted fabric composed of short fibers that are thin and excellent in elasticity without losing the unique texture of high wet modulus rayon, At the same time, it had excellent anti-pilling properties, bursting strength, and abrasion strength.

  In contrast, in the knitted fabric of Comparative Example 1, the blend ratio of the high-wet modulus rayon short fibers A was too low, so that the texture unique to the high-wet modulus rayon was not maintained.

  In the knitted fabric of Comparative Example 2, the blend ratio of the solvent-spun cellulose short fibers B subjected to the anti-fibrillation process at the raw cotton stage was too low, so that the solvent-spun cellulose short fibers B contributed to the mechanical performance of the knitted fabric. The result was inferior in bursting strength and wear strength.

  Since the knitted fabric of Comparative Example 3 was knitted with a 28 gauge needle bed having a gauge number smaller than 32 gauge defined in the present invention, the burst strength and abrasion strength were the same as the knitted fabric of Comparative Example 2. It was inferior to.

In the knitted fabric of Comparative Example 4, the basis weight exceeded the upper limit of 150 g / m ² defined in the present invention, and thus the intended thin knitted fabric could not be obtained.
In the knitted fabric of Comparative Example 5, the basis weight was below the lower limit of 100 g / m ² defined in the present invention, so that the knitted fabric was too thin and inferior in bursting strength and abrasion strength.

  Since the knitted fabric of Comparative Example 6 was knitted by normal ring spinning without using the compact spinning technique, the average fluff index of 3 mm or more reached 56/10 m. As a result, although sufficient strength was maintained, it was inferior to pilling. Further, the needle was deformed to cause loop deformation in the knitted fabric, and as a result, visible streaks were generated in the knitted fabric.

  Although the knitted fabric of Comparative Example 7 was knitted by ordinary ring spinning without using the compact spinning technique, the anti-pilling resin processing was performed at the time of finishing processing, so the pilling was good. there were. However, it was inferior in bursting strength and abrasion strength.

  The knitted fabric of Comparative Example 8 was obtained by omitting the fibrillation prevention process for the raw cotton of the solvent-preventing cellulose fiber, so that the thinning could be achieved and all the basic physical properties were satisfied. When the cellulose fiber is fibrillated and repeatedly used, fuzz is generated, the texture is cured, and the appearance is remarkably deteriorated.

  The knitted fabric of Comparative Example 9 is a bare milled tissue as defined in the present invention rather than a bare milled tissue, and therefore has a thick structure and therefore has a high fabric weight. I couldn't get the ground.

  Since the knitted fabric of Comparative Example 10 did not use polyurethane fibers, it became a gauze-like knitted fabric, had a low basis weight, a poor return when stretched, a laughing phenomenon, and poor stretchability. The bursting strength was also inferior.

Claims (1)

A knitted fabric comprising a high-wet modulus rayon short fiber A and a solvent-spun cellulose short fiber B subjected to anti-fibrillation treatment at the raw cotton stage, and a polyurethane yarn C;
In the blended yarn, the blend ratio of the high wet modulus rayon short fiber A and the solvent-spun cellulose short fiber B is A: B = 55: 45 to 70:30 by mass ratio, and the average fluff index of 3 mm or more is 40 pieces. / 10m or less,
The knitted fabric has a basis weight of 150 g / m ² or less and 100 g / m ² or more, and is composed of a bare tentacle structure knitted with a single needle bed of 32 gauge or more and 46 gauge or less. A knitted fabric characterized by a recovery rate of 90% or more.