JP5476050B2 - Cloth - Google Patents

Description

  The present invention is a fabric for clothing capable of suppressing the texture hardening due to repeated washing, and more specifically worn over a long period of time, such as sports shirts, underwear, gym clothes for school sales, uniforms, home textiles such as bedding, etc. The present invention relates to a fabric that is repeatedly washed.

  Highly water-absorbing and hygroscopic for fabrics that often come into direct contact with the skin, such as sports shirts, underwear, gym clothes for school sales, uniforms, bedding, and other home textiles, from the perspective of sweat treatment, comfort and hygiene Cellulosic fibers are frequently used.

  Fabrics composed of cellulosic fibers, especially fabrics with a cellulosic fiber content of more than 50% by mass, and more than 70% by mass, swell and dry during repeated washing and drying processes, causing shrinkage and morphological changes. It is easy to use, and ultimately, a significant texture hardening may be caused, resulting in a reduction in the merchantability.

  As a means for suppressing texture hardening due to repeated washing, soft processing after dyeing is common. Examples of the softening agent include cationic softening agents represented by dialkyldimethyl quaternary ammonium salts and fatty acid amides (see Non-Patent Document 1). These can smooth the fiber surface and reduce the coefficient of friction, giving a feeling of softness that can withstand several times of washing after processing and processing, but if the washing is repeated more than ten times, the effect of Durability was not sufficient and single yarn sticking could not be suppressed.

  Silicone softeners represented by N-methylol compounds, organosiloxanes, and dimethylpolysiloxanes modified with amino groups have been disclosed as reactive softeners that improve washing durability (see Non-Patent Document 2). ). However, these improve the washing durability against cationic softeners, but do not maintain the flexibility after washing several tens of times, and are too slippery or slimy from the texture of the fabric after processing. From the aspect of consumption performance, there has been a problem of promoting the occurrence of pilling and scuffing by repeated wearing and washing.

  In addition, there is a technology to improve washing durability by using a resin processing agent typified by glyoxal and a softening agent. However, since the resin processing agent forms a crosslink, the texture after the resin processing becomes hard. There was a problem that durability for washing several tens of times could not be obtained.

  In addition, a technique of forming a film of a water-soluble or water-dispersible polymer on the surface of the cellulose fiber to improve the dimensional stability against water without damaging the texture (see Patent Document 1), and the cellulose fiber were treated with liquid ammonia After that, a technique (see Patent Document 2) for suppressing shrinkage and texture hardening by washing without resin processing by acid treatment and acid treatment to cellulose III crystal structure is disclosed, but several tens of times Durability when subjected to a large physical load such as repeated washing was not considered.

Japanese Patent Publication No.62-12347 JP-A-11-200241

Auxiliaries / Drugs Page 20-29 Japan Textile Machinery Society Textile Finishing Chapter 7 Pages 231-244 IS Corporation

  An object of the present invention is to wear and wash a fabric containing 50% by mass or more of cellulosic fibers in order to obtain a sweat treatment function and comfort without giving an excessive slip feeling, slimy feeling or texture hardening to the initial texture. Are to prevent pilling or scuffing caused by repeating the above, and texture hardening due to repeated washing, thereby enhancing the product durability of the fabric.

  The inventor examined the factors of the texture hardening by repeated washing by changing the types of fibers to be used, the mixing ratio, and the conditions for forming the fabric. Texture hardening by repeated washing is a phenomenon that is remarkably seen in cellulosic fibers that have high water absorption and tend to cause hydrogen bonding between fibers. Texture hardening tends to occur more easily in a knitted fabric having a higher degree of freedom of structure than a woven fabric, in a fabric having a high mixing ratio of cellulosic fibers, and in a regenerated cellulose fiber having a high water absorption and swelling degree. In recent years, especially in inner products, pursuing to make the initial texture as soft as possible and increasing the standard of the single yarn fineness and the fine count, the difference in texture before and after repeated washing is even more conspicuous. End up. The inventor has found from the results of various experiments that the main factor of texture hardening is the convergence of cellulosic fibers caused by the sticking of single yarns, and a fabric is formed using such yarns with little convergence. Thus, it has been found that texture hardening due to repeated washing can be effectively suppressed. That is, the present invention is as follows.

  (1) It consists of a fabric structure containing 50% by mass or more of cellulosic fibers, and the average yarn diameter after washing and drying is repeated 30 times for the yarn constituting the fabric structure, the average yarn diameter before washing A fabric that is 80% or more of the diameter.

  (2) The fabric according to (1), wherein the cellulosic fiber is a regenerated cellulose fiber.

  (3) The fabric according to (1) or (2), wherein a long-chain hydrocarbon compound having an alkyl acrylate group is attached to at least the surface of the cellulose fiber.

  (4) A copolymer of a long-chain hydrocarbon compound containing an alkyl acrylate group and a long-chain hydrocarbon compound containing a halogenated acrylate group is attached to at least the surface of the cellulose fiber, The fabric according to (1) or (2) above.

  The fabric of the present invention is composed of yarns in which single yarn agglutination is suppressed, so that it has a good sweat treatment function and comfort due to a high cellulose mixing ratio, and an excessive slip feeling in the initial texture, Without giving a feeling of slimness or texture hardening, it is possible to suppress pilling and scraping and texture hardening when wearing and washing are repeated. In particular, the fabric of the present invention uses a lot of water-absorbing and hygroscopic cellulosic fibers such as sports shirts, underwear, gym clothes for school sales, uniforms, home textiles, etc., and is repeatedly worn and washed over a long period of time. It is suitable for applications and can impart excellent product durability in these applications.

It is a schematic diagram explaining the measurement location of the diameter of the thread | yarn which comprises the fabric structure | tissue containing a cellulose fiber in a knitted fabric.

  The present invention is described in detail below. The fabric in the present invention is composed of a fabric structure containing 50% by mass or more of cellulosic fibers, and the average yarn diameter after washing and drying is repeated 30 times for the yarns constituting the fabric tissue before washing. It is characterized by maintaining 80% or more of the yarn diameter.

  Cellulosic fibers refer to natural fibers such as cotton, regenerated cellulose fibers, and fibers combining these. Examples of the regenerated cellulose fibers include cupra, tencel, viscose rayon, polynosic, modal and the like and composite fibers thereof. As the cellulose fiber, regenerated cellulose having a high hygroscopic property is more preferable in terms of higher wearing comfort. The cellulosic fibers contained in the fabric of the present invention may be single type or plural types.

  The form of the cellulosic fiber may be a long fiber, a short fiber, or a composite form thereof. In addition, the cross section of the cellulosic fiber can be round, triangular, chrysanthemum, multileaf, flat, L, Y, C, W, peanut, or the like.

  In the present invention, in order to increase the initial softness of the fabric, the fabric contains 50% by mass or more of cellulosic fibers. By containing 50% by mass or more of cellulosic fibers in the fabric, the hygroscopicity is increased and the wearing comfort can be achieved. When the cellulose fiber content in the fabric is less than 50% by mass, the initial softness is not exhibited, and the hygroscopicity and thermal conductivity are not sufficient, and it becomes easy to feel stuffiness under heat. The cellulose fiber content in the fabric is preferably 55% by mass or more, more preferably 60% by mass or more. The cellulosic fiber content in the fabric may be 100% by mass, for example, 90% by mass or less, and further 80% by mass or less, so that cellulosic fibers and other fibers can be used as desired within a range not impairing the effects of the present invention. In this case, preferred properties of the other fibers can be imparted to the fabric of the present invention.

  In the fabric of the present invention, with respect to the yarn constituting the fabric structure containing 50% by mass or more of cellulosic fibers, the average yarn diameter after repeating washing and drying 30 times is the average yarn diameter before washing. 80% or more. In the present specification, the yarn constituting the fabric structure means, for example, a yarn constituting one loop in a knitted fabric, and a yarn constituting each process in a woven fabric. The yarn constituting the fabric structure is composed of one or more kinds of fibers including at least a cellulosic fiber. In addition, in this specification, the yarn diameter means an apparent diameter of the yarn, and specifically, from two-dimensional measurement with a microscope or a microscope in a direction perpendicular to the length direction of the yarn. This is the value obtained. The yarn diameter is measured by avoiding the knot portion in the knitted fabric and the intersection portion in the woven fabric. The average yarn diameter means the number average value of 18 points excluding the maximum value and the minimum value among the yarn diameters measured at random 20 points. In the present specification, “after 30 times of washing and drying” means after 30 times of washing and drying according to JIS-L-1027 103 method, and more specifically, Using a commercially available detergent (for example, an attack manufactured by Kao Corporation), the fabric to be evaluated together with the weight-enhancing fabric is “5 minutes washing—30 seconds dehydration—2 minutes rinse—30 seconds dehydration—2 minutes rinse—30 seconds dehydration—natural “Drying (drying at 20 ° C. × 40% RH for a whole day and night)” means after 30 cycles.

  In a fabric containing cellulosic fibers at a high blending ratio of 50% by mass or more, the cellulosic fibers converge due to the sticking of single yarns by washing, and when the diameter of the yarn constituting the fabric structure containing the cellulosic fibers is reduced, The merchantability is lowered after washing by texture hardening or the like. Retention rate with respect to the average yarn diameter before washing of the average yarn diameter of the yarn constituting the fabric structure containing cellulosic fibers after 30 times of washing and drying by the method described later (hereinafter, after washing) If the yarn diameter retention ratio is less than 80%, single yarn sticking occurs, and texture hardening, creaking, and crispness are conspicuous, resulting in a reduction in merchantability. The yarn diameter retention after washing is preferably 85% or more.

In a fabric containing 50% by mass or more of cellulosic fibers and having a yarn diameter retention after washing of 80% or more, single yarn sticking due to washing is suppressed.
In order to make it difficult for single yarn sticking to occur, the yarn containing cellulosic fibers is preferably made of fibers having two or more types of cross-sections, particularly two or more types, from the viewpoint of making it difficult to close-pack the fibers. It is preferably made of cellulosic fibers having a cross-sectional shape of The fibers having two or more types of cross-sectional shapes may be the same or different from each other, but are fibers having two or more types of cross-sectional shapes made of different materials. It is particularly preferred. Examples of more specific combinations include a combination of a cupra having a round cross section and cotton having a flat hollow cross section, a combination of a cupra having a round cross section and a rayon having a flat hollow cross section, and the like.

  Moreover, in the fabric of this invention, it is preferable that the long chain hydrocarbon type compound which has an alkyl acrylate group has adhered to the surface of the cellulosic fiber at least. Further, it is also preferable that a copolymer of a long-chain hydrocarbon compound containing an alkyl acrylate group and a long-chain hydrocarbon compound containing a halogenated acrylate group is attached to at least the surface of the cellulosic fiber. . Thereby, the physical damage during cloth washing can be reduced, single yarn sticking between fibers can be more effectively suppressed, and the yarn diameter retention after washing can be increased.

  A long-chain hydrocarbon compound having an alkyl acrylate group, and a copolymer of a long-chain hydrocarbon compound having an alkyl acrylate group and a long-chain hydrocarbon compound having a halogenated acrylate group (hereinafter, these are summarized) The surface processing agent) can be attached to the surface of the cellulosic fiber by attaching it to the surface of the cellulosic fiber, for example, by a fabric processing treatment described later. When using the surface treatment agent, the surface treatment agent may be formed at least on the surface of the cellulosic fiber, and the surface treatment agent is present inside the cellulosic fiber, the surface of the other fiber, and / or the inside of the other fiber. Also good.

  The content of the surface finishing agent in the fabric is preferably 0.1 to 2% by mass and preferably 0.3 to 2% by mass with respect to 100% by mass of the fabric excluding the surface finishing agent. More preferred. When the content is 0.1% by mass or more, the effect of suppressing single yarn sticking is better. On the other hand, when the content exceeds 2% by mass, no significant improvement in the suppression effect is seen compared to the case of 2% by mass.

  The carbon number of the alkyl acrylate group of the long-chain hydrocarbon compound having an alkyl acrylate group is preferably as large as possible from the viewpoint of the effect of suppressing single yarn sticking, but if the carbon number is too large, the handling property of the agent tends to be low. Therefore, the number of carbon atoms is preferably 12-18, and more specifically, for example, a lauryl acrylate group having 12 carbon atoms, a cetyl acrylate group having 16 carbon atoms, a stearyl acrylate group having 18 carbon atoms, or the like is preferable. . The skeleton structure of the long-chain hydrocarbon compound having an alkyl acrylate group is not particularly limited. However, if the skeleton has a large number of carbon atoms, the long-chain hydrocarbon compound having an alkyl acrylate group and the fiber surface that is a hydrocarbon compound are compatible. It is preferable because a film that is easy and difficult to peel off is formed.

  The number average molecular weight of the long-chain hydrocarbon compound having an alkyl acrylate group is preferably 5,000 to 30,000, and preferably 5,000 to 10,000, from the viewpoints of dispersibility and stable film formation. More preferably. In addition, the number average molecular weight described in this specification is a value measured using GPC.

  As a copolymer of a long-chain hydrocarbon compound containing an alkyl acrylate group and a long-chain hydrocarbon compound containing a halogenated acrylate group, a long-chain hydrocarbon compound containing an alkyl acrylate group as described above is used. And a long-chain hydrocarbon compound containing an acrylate group halogenated with fluorine or the like is copolymerized so as to have a polymerization ratio of 70:30 to 30:70 (molar ratio). The number average molecular weight of this copolymer is preferably 5,000 to 50,000, more preferably 5,000 to 10,000, from the viewpoint of dispersibility and stable film formation. When this copolymer is used as a processing agent to form a film of the copolymer on the fiber surface, the surface tension of the fiber is lowered, and the fiber may exhibit water and oil repellency. As a result, swelling of the fibers in the wash water can be suppressed, damage due to mechanical force can be reduced, and sebum dirt can be made difficult to adhere. On the other hand, the initial texture after processing can be cured, and the fibers cannot absorb liquid sweat. There are concerns about such problems. Therefore, when using the above-mentioned copolymer, it is preferable to carry out processing so that water repellency does not appear and the initial texture does not become hard, and for this purpose, it differs from general water and oil repellent durable processing formulations. The adhesion concentration of the copolymer to the fabric is as thin as possible, for example, more preferably 1.5% by mass or less with respect to 100% by mass of the fabric (mass excluding the surface processing agent), and 1.0% by mass. % Or less is particularly preferable, and it is particularly preferable not to use a binder in combination.

  When the fabric of the present invention is composed of cellulosic fibers and other fibers, as a method for incorporating other fibers in the fabric, a method using a composite yarn composed of cellulosic fibers and other fibers, cellulosic Examples include a method of using fibers and other fibers as separate yarns, and combinations thereof. The cross section of the other fibers can be round, triangular, chrysanthemum, multileaf, flat, L, Y, C, W, peanut, or the like.

  For example, when the cellulosic fibers are long fibers, the cellulosic fibers and other fibers such as polyester and nylon may be knitted or woven (hereinafter also collectively referred to as knitted knitted fabric), or interlaced. You may form the composite yarn which consists of a cellulosic fiber and this other fiber by general physical processing methods, such as a process, a fluid disturbance process, and a twisted thread. Further, such a composite yarn and, for example, spandex may be further combined. In this case, the machine may be knitted on the machine with a bear, and knitted and knitted as CSY (core spun yarn) or FTY (covering yarn). May be. In addition, for example, when the cellulosic fiber is a short fiber, it is possible to blend the cellulosic fiber with another fiber such as a synthetic fiber such as polyester or acrylic. As for the spinning method, a general method such as ring, MVS (Murata Vortex Spinning), fine spinning and twisting can be used, and there may be a slab-like thickness variation in the yarn length direction. Further, such a blended yarn and spandex may be further combined, and in this case, the machine may be knitted on the machine with bare, or may be knitted and woven as CSY or FTY.

  Regarding the composite yarn form in which cellulosic fibers and other fibers are combined, when the cross section of the composite yarn is observed, if the cellulosic fibers and other fibers are evenly mixed and dispersed, It is more preferable because yarn sticking hardly occurs. A composite yarn is preferably composed of fibers having two or more types of cross-sectional shapes, rather than composed of fibers having a single cross-sectional shape, because it is more difficult to close-pack. Specific examples include a combination of a cupra having a round cross section and a W-shaped atypical cross section polyester.

  The thickness of the yarn constituting the fabric structure in the fabric of the present invention (hereinafter also simply referred to as “constituting yarn”) is preferably 170 dtex or smaller than the cotton count 30. If the component yarn becomes thicker than 170 dtex or cotton count 30 or more, the component yarn itself becomes bent and hard, and the desired initial texture after weaving cannot be achieved, and it is cramped and used for general clothing such as underwear, sportswear, uniforms, etc. Not as appropriate. When the constituent yarn is a composite yarn, the above-described constituent yarn thickness is the thickness in the composite state. For example, in the composite yarn of 56 dtex fiber and 112 dtex fiber, the constituent yarn thickness is 56 dtex + 112 dtex, and the 84 dtex fiber and 84 dtex fiber. In the composite yarn with the fiber, the constituent yarn thickness is 84 dtex + 84 dex. Further, when a thread thinner than 55 dtex or cotton count No. 60 is used as each fiber (excluding spandex described later) in the composite yarn, the burst strength of the fabric is likely to be lowered or broken, which is not preferable in terms of consumption performance. For example, when cellulosic fibers and spandex are knitted, the spandex preferably has a thickness of 11 dtex or more and 44 dtex or less. When the spandex thickness is less than 11 dtex, the burst strength tends to decrease, and when it exceeds 44 dtex, the body may be excessively tightened. The single yarn fineness of the cellulosic fibers is preferably 0.8 dtex or more and 2.0 dtex or less. When the single yarn fineness is less than 0.8 dtex, the initial texture is soft, but the single yarn tends to stick, and when it exceeds 2.0 dtex, the initial texture tends to be low.

  The structure of the fabric is not particularly limited, and may be a woven fabric or a knitted fabric. However, since the knitted fabric has a higher degree of freedom of the fabric than the woven fabric, the effect of the present invention is easily clearly expressed. In the case where the fabric is a knitted fabric, examples of the structure include round knitting such as tengu, smooth, milling, and Kanoko, and warp knitting such as denbi structure and cord structure. When the fabric of the present invention is applied to a product that directly touches the skin, in order to reduce the coefficient of friction with the skin, in the case of a circular knitting, for example, a tissue with a flat wearing skin side such as a tengu, milling, smooth, and Omoka-no-ko. It is preferable to select and reduce the degree. For example, in the case of a single knitting, a method of reducing the pull of the lowering cam can be adopted, and in the case of a double knitting, a method of reducing the tooth opening can be adopted. As for the knitting machine, the hook diameter can be used depending on the application, but for example, 19GG to 36GG may be used according to the yarn to be knitted.

  When the fabric is a woven fabric, examples of the structure include a general structure such as a plain weave, a twill weave, a satin weave, and a double weave, and their changed structures.

The fabric weight per unit area is preferably in the range of 80 to 250 g / m ² and more preferably in the range of 100 to 220 g / m ² in view of the balance of texture, sweat treatment function and consumption performance.

  The case of producing a knitted fabric will be described as an example for the method for producing a fabric of the present invention. For example, knitting is performed with a circular knitting machine of 19 GG or more and 36 GG or less using regenerated cellulose long fibers or a composite yarn of regenerated cellulose long fibers and polyester fibers. As dyeing processing for the knitted fabric, scouring, bleaching, dyeing, finishing and final setting are preferably performed. When knitting spandex and cellulosic fibers, it is preferable to perform pre-setting after opening before scouring and dyeing, and then sew and sew again in a ring.

  As a processing machine used for scouring, bleaching and dyeing, a tensionless machine such as a generally used liquid dyeing machine or a continuous scouring machine is preferred. For scouring, a surfactant such as non-ion or anion can be used. For dyeing, it is preferable to use a Wins dyeing machine, a liquid dyeing machine, a circular, or the like, and soaping may be performed as necessary after dyeing. For drying, a commonly used dryer can be used, but a shrink surfer that is less susceptible to warp tension is preferable.

  In the fabric of the present invention, when the surface treatment agent described above is adhered to the fiber, in the finishing process, an emulsion containing the surface treatment agent is padded on the previously dried fabric, nipped with a mangle, and then dried and cured. It is preferable to form a film of the surface treatment agent on the surface of each fiber through a heating step.

  The concentration of the surface finishing agent in the emulsion is preferably adjusted to 20 to 30% by mass using an organic solvent and water in terms of good handleability. The amount of adhesion of the surface treatment agent to the fabric is 100% by mass of the fabric (the mass excluding the surface treatment agent) in that a uniform film can be formed on the entire fabric and the change in the constituent yarn diameter can be effectively suppressed. It is preferable that it is 0.1-2 mass% with respect to it, and it is more preferable that it is 0.3-2 mass%. Even if the surface finish is applied to the fabric in excess of 2% by mass, the performance does not change significantly. For this reason, the surface treatment agent-containing emulsion is diluted to a solid content concentration of 1 to 6% by mass or picked up when nipping with a mangle (ratio of emulsion mass adhering to fabric after treatment to fabric mass before treatment (% )) May be controlled so as to be 70% to 100% to adjust the amount of the surface processing agent attached to the fabric, and in this case, the handleability in the subsequent processing step is improved.

  The drying and curing process after the nip can be performed with a general tenter and setter. At this time, regarding the drying step, it is preferable to dry completely within a range of a temperature of about 100 ° C. to 130 ° C. and a time of 1 to 2 minutes. For the curing step, if the temperature is preferably 160 ° C. to 185 ° C., more preferably 170 to 180 ° C. and the time is preferably 0.5 to 2 minutes, more preferably 1 to 2 minutes, the fluidity of the emulsion And a film is easily formed uniformly on each fiber. It is preferable to use a dry heat type setter rather than a steam type because the effect of the durability of the film is high.

  In the fabric of the present invention thus obtained, single yarn sticking hardly occurs and the yarn diameter retention after washing is high. Therefore, in order to obtain a sweat treatment function and comfort, the mixing ratio of the cellulosic fibers is increased. Also, it is possible to suppress the texture hardening when the wearing and washing are repeated. Therefore, the fabric of the present invention uses a lot of water-absorbing and hygroscopic cellulosic fibers such as sports shirts, underwear, gym clothes for school sales, uniforms, home textiles, etc., and is repeatedly worn and washed over a long period of time. It is suitable for the use and the merchantability of the fabric product can be prolonged.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further more concretely, this invention is not limited to these. Further, the composition, properties, texture and various performances of the fabric are summarized in Table 1. Details of the average yarn diameter measuring method, the texture inspection method, and the washing method of the yarn constituting the fabric structure according to the present invention will be described below.

(1) Method for Measuring Average Thread Diameter of Threads Constructing Fabric Texture The average diameter of the threads constituting the fabric structure containing cellulosic fibers was measured by the following method. Drawing 1 is a mimetic diagram explaining the measurement part of the diameter of the thread which constitutes the textile organization containing cellulosic fiber in a knitted fabric. Using a microscope or a microscope, the diameter of the yarn 1 constituting the fabric structure was measured two-dimensionally at a total of 20 points at random positions. For the length measurement, except for the knot portion in the case of knitted fabrics and excluding the crossing portion in the case of woven fabric, the portion perpendicular to the yarn length direction as shown in FIG. It was. A number average value of 18 points excluding the maximum value and the minimum value was derived and used as the average yarn diameter. This measurement is performed before washing and after washing, which will be described later, and the average yarn diameter after washing is obtained by multiplying the value obtained by grading the average yarn diameter before washing by 100 to obtain the yarn diameter retention rate (% ) Was calculated. Although it can set arbitrarily about the magnification to observe, it observed by 100-150 times in view of the ease of observation.

(2) Texture (softness before washing, softness after washing) inspection method For each of the fabrics before and after washing, 10 subjects evaluated the fabric texture in 5 stages, and the average value was derived.
5 Very soft 4 Slightly soft 3 Neither 2 2 Hard 1 Very hard For the evaluation, a fabric conditioned for one day and night from the day before the test in an environment of 20 ° C. × 65% RH was used.

(3) Evaluation method for slimming before washing For 10 fabrics, 10 subjects will evaluate the feeling of sliminess. If there is a feeling of slimness, the score will be -1 point. An average value of 0 was derived. When the average value was negative, there was a feeling of sliminess, when it was positive, there was no feeling of sliminess, and when it was zero, it was evaluated as neither. For the evaluation, a fabric conditioned for one day and night from the day before the test in an environment of 20 ° C. × 65% RH was used.

(4) Pilling property About the example using a short fiber, pilling property evaluation and determination were performed according to JIS-L-1076 ICI method. Background The average value of each N = 2 was calculated, and the grade 3 or higher was determined as the standard pass.

<Method for scouring fabric>
Scouring agent Score roll FC-250 2g / L (nonionic surfactant, manufactured by Kitahiro Chemical)
Scouring conditions 80 ° C x 20 minutes

<How to wash>
Washing and drying were repeated 30 times according to JIS-L-1027 103 method. As the detergent, an attack made by Kao Corporation was used, and the fabric to be evaluated together with the weight-enhancing fabric was “5 minutes washing−30 seconds dehydration−2 minutes rinse−30 seconds dehydration−2 minutes rinse−30 seconds dehydration−natural drying (20 ° C. × It was flatly dried at 40% RH for a whole day and night) and repeated 30 cycles.

< Reference Example 1>
Polyester W-shaped long cross-section fibers (34 dtex / 18f) and regenerated cellulose fibers, cupra long fibers (84 dtex / 54f, manufactured by Asahi Kasei Fibers Co., Ltd.), interlace processing machine, yarn speed 309 m / min, first heater temperature 160 A composite processed yarn of polyester and cupra was produced at a temperature of 1.5 ° C., an I / L pressure of 1.5 × 10 ⁵ Pa, and a twister belt angle of 95 degrees. Subsequently, a milled knitted fabric was knitted using a 19 GG circular knitting machine. When the cross section of the knitted fabric was observed, the round cross-section cupra and the atypical polyester were mixed together evenly. This was scoured with a liquid dyeing machine, washed with water, and dried with a shrink surfer at 120 ° C. for 1 minute. Subsequently, only polyester fibers were one-sided with a disperse dye using a liquid dyeing machine, then washed with water and soaped, and dried on a shrink surfer at 120 ° C. for 1 minute. This knitted fabric had a basis weight of 146 g / m ² , a cellulose blending ratio of 71% by mass, a course number of 59 and a wal number of 32, and was not slimy before washing, and the texture was determined to be 3.9. The yarn diameter retention after washing was 80%, and the texture after washing did not become hard at 3.4.

<Example 2>
A milled knitted fabric was knitted on a 19GG small-size round knitting machine using 100% by mass of cupra short fibers (No. 40 /-, single yarn 0.8 dtex, manufactured by Asahi Kasei Fiber), which is regenerated cellulose. After scouring, it was washed with water and dried with a shrink surfer at 120 ° C. for 1 minute. Subsequently, after dyeing with a reactive dye using a liquid flow dyeing machine, washing with water and soaping were performed, followed by drying with a shrink surfer at 130 ° C. for 1 minute. Subsequently, an emulsion prepared by adjusting a surface treatment agent, which is a long-chain hydrocarbon compound having a stearyl alkyl acrylate group (number average molecular weight 8,000), to a solid content concentration of 20% by mass with propanol and water is further added to water. The solution A was prepared by diluting to a solid content concentration of 4% by mass. The pick-up rate after padding A liquid on the knitted fabric and nipping with the mangle was 90%. Then, after drying at 130 ° C. × 1 minute with a shrink surfer, curing was performed again at 170 ° C. × 1 minute. The basis weight of the knitted fabric is 155 g / m ² , the cellulose mixing ratio is 100% by mass, the adhesion amount of the surface processing agent to the fabric mass (mass excluding the surface processing agent) is 0.72% by mass, the number of courses is 50, and the number of wales is 24. The texture before washing did not give a slimy feeling and was judged to be 4.3. The yarn diameter retention after washing was 85%, and the texture after washing was not hard at 4.1. When the pilling performance of the knitted fabric before washing was evaluated, it was graded 3.5 and passed the standard.

<Example 3>
A smooth knitted fabric was knitted by a 22GG small round knitting machine using 100% by mass of regenerated cellulose cupra long fibers (84/45 dtex × 2, manufactured by Asahi Kasei Fiber). After scouring, it was washed with water and dried with a shrink surfer at 120 ° C. for 1 minute. Subsequently, after dyeing with a reactive dye using a liquid flow dyeing machine, washing with water and soaping were performed, followed by drying with a shrink surfer at 130 ° C. for 1 minute. Subsequently, a block copolymer obtained by polymerizing a long-chain hydrocarbon compound having a perfluorooctyl acrylate group and a long-chain hydrocarbon compound having a stearyl alkyl acrylate group so as to have a polymerization ratio of 65:35 (molar ratio) An emulsion prepared by adjusting a surface finishing agent having an average molecular weight of 12,000) to a solid content concentration of 20% by mass with propanol and water was further diluted with water to a solid content concentration of 3% by mass to prepare a liquid B. . The pickup rate of the knitted fabric after nipping with padding and mangle was 100%. Then, it dried with 130 degreeC * 1 minute with the dry heat setter with a frame, and performed curing at 170 degreeC * 1 minute. The basis weight of this knitted fabric is 205 g / m ² , the cellulose mixing ratio is 100% by mass, the adhesion amount of the surface processing agent to the fabric mass (mass excluding the surface processing agent) is 0.60% by mass, the number of courses is 43, and the number of wales is 30. The texture before washing was good with no sliminess, and was determined to be 4.4. The yarn diameter retention after washing was 90%, and the texture after washing was 4.2 and did not become hard.

<Example 4>
A bare tentacle was knitted on a 28GG circular knitting machine using regenerated cellulose cupra short fibers (# 40 /-, single yarn 0.8 dtex, manufactured by Asahi Kasei Fiber) and spandex (22 dtex, manufactured by Asahi Kasei Fiber). This knitted fabric had a cellulose content of 95% by mass. After presetting the opening, it was washed with water after scouring, dyed with reactive dye using a liquid dyeing machine, washed with water and soaped, and dried with a shrink surfer at 130 ° C. for 1 minute. Subsequently, the block copolymer weight adjusted so that the polymer of the long-chain hydrocarbon compound having a perfluorooctyl acrylate group and the long-chain hydrocarbon compound having a stearyl alkyl acrylate group has a polymerization ratio of 75:25 (molar ratio). An emulsion prepared by combining a surface treatment agent, which is a coalescence (number average molecular weight 12,000), with propanol and water so as to have a solid content concentration of 20% by mass is further diluted with water to a solid content concentration of 2% by mass. Was made. The pick-up rate of the knitted fabric after nipping with padding and mangle was 71%. Then, after drying at 130 degreeC x 1 minute with a tenter, final setting was performed at 180 degreeC x 1 minute. The basis weight of this knitted fabric is 210 g / m ² , the amount of the surface treatment agent attached to the fabric mass (the mass excluding the surface treatment agent) is 0.28% by mass, the number of courses is 69, and the number of wales is 43. It was good and it was determined to be 4.5. The yarn diameter retention after washing was 87%, and the texture after washing was 4.0 and did not become hard. When the pilling performance of the knitted fabric before washing was evaluated, it was grade 4 and passed the standard.

<Comparative Example 1>
A milled knitted fabric was knitted with a 19GG small size round knitting machine using cotton (# 40 /-). After scouring, it was washed with water, exposed, and dried on a suction drum at 120 ° C. for 1 minute. Subsequently, after dyeing with a fluorescent dye using a liquid flow dyeing machine, washing with water and soaping were performed, followed by drying with a shrink surfer at 130 ° C. for 1 minute. The knitted fabric pick-up rate is 90% after preparing the D liquid by diluting the surface treatment agent which is the epoxy modified silicone emulsion Nikka Silicon EP2010 (manufactured by Nikka Chemical Co., Ltd.) to 2% by mass of padding and mangle. Met. Then, after drying at 130 ° C. × 1 minute with a shrink surfer, curing was performed again at 150 ° C. × 2 minutes. The basis weight of this knitted fabric was 155 g / m ² , the cellulose mixing ratio was 100% by mass, the number of courses was 51, the number of wales was 29, and the texture before washing was determined to be 4.0, but there was a feeling of sliminess. The yarn diameter retention after washing was 75%, and the texture after washing was inferior in washing durability and became slightly hard at 2.8. When the pilling performance of the knitted fabric before washing was evaluated, it was 2.5 grade and did not pass the standard.

<Comparative example 2>
Bare sheeting was knitted on a 28GG circular knitting machine using cupra short fibers (# 50 /-, single yarn 0.8 dtex, manufactured by Asahi Kasei Fiber) and spandex (22 dtex, manufactured by Asahi Kasei Fiber). This knitted fabric had a cellulose content of 94% by mass. After presetting the opening, it was washed with water after scouring, dyed with reactive dye using a liquid dyeing machine, washed with water and soaped, and dried with a shrink surfer at 130 ° C. for 1 minute. Subsequently, an E solution containing glyoxal resin uniresin 168N at an agent concentration of 8% by mass and unicatalyst at an agent concentration of 2% by mass (both manufactured by Union Chemical Co., Ltd.) was prepared as a surface processing agent solution. The pick-up rate of the knitted fabric after nipping with padding and mangle was 69%. Then, after drying at 130 ° C. × 1 minute with a tenter, curing was performed at 170 ° C. × 1 minute. The basis weight of the knitted fabric was 180 g / m ² , the number of courses was 73, and the number of wales was 47. There was no sliminess before washing, and the knitting fabric pilling performance was grade 3 and passed the standard, but the texture before washing was 3.5. The yarn diameter retention after washing was 75%, and the texture after washing was slightly hard at 2.7.

<Comparative Example 3>
Bare sheeting was knitted on a 28GG circular knitting machine using cupra short fibers (No. 60 /-, single yarn 0.8 dtex, manufactured by Asahi Kasei Fiber) and spandex (22 dtex, manufactured by Asahi Kasei Fiber). This knitted fabric had a cellulose content of 90% by mass. After presetting the opening, it was washed with water after scouring, dyed with reactive dye using a liquid dyeing machine, washed with water and soaped, and dried with a shrink surfer at 130 ° C. for 1 minute. A pick-up rate of the knitted fabric after preparing a liquid F obtained by diluting the surface-modifying agent, which is amino-modified silicone nikka silicone AMZ-3 (manufactured by Nikka Chemical), to a concentration of 2% by mass, and niping with padding and mangle is 70% Met. Then, after drying at 100 ° C. × 3 minutes with a shrink surfer, final setting was performed at 170 ° C. × 1 minute. The basis weight of the knitted fabric was 170 g / m ² , the number of courses was 91, and the number of wales was 46. Although the texture before washing was evaluated as 4.0, the yarn diameter retention after washing was 73%, and the texture after washing became as hard as 2.1. When the pilling performance of the knitted fabric before washing was evaluated, it was 2.5 grade and did not pass the standard.

  The fabric of the present invention is suitable for fields that often come into direct contact with the skin, such as sports shirts, underwear, gym clothes for school sales, uniforms, bedding, home textiles, etc., and is composed of yarns in which single yarn sticking is suppressed. Therefore, even if the mixing ratio of the cellulosic fibers is increased in order to obtain a sweat treatment function and comfort, it is possible to suppress the texture hardening when wearing and washing are repeated, and to prolong the merchantability of the fabric. .

1 Yarn 2 Thread diameter measurement location

Claims (3)

A long-chain hydrocarbon compound having a number average molecular weight of 5,000 to 30,000 having an alkyl acrylate group having 12 to 18 carbon atoms and comprising a fabric structure containing 50% by mass or more of cellulosic fibers is at least the cellulose fiber. A fabric that adheres to the surface and has an average yarn diameter after repeating washing and drying 30 times for the yarn constituting the fabric structure is 85 % or more of the average yarn diameter before washing. Number of long-chain hydrocarbon compounds comprising a fabric structure containing 50% by mass or more of cellulosic fibers and containing an alkyl acrylate group having 12 to 18 carbon atoms and a long-chain hydrocarbon compound containing a halogenated acrylate group The block copolymer having an average molecular weight of 5,000 to 50,000 is attached to at least the surface of the cellulosic fiber, and the yarn constituting the fabric structure is subjected to washing and drying after 30 times. A fabric having an average yarn diameter of 85 % or more of an average yarn diameter before washing. The fabric according to claim 1 or 2 , wherein the cellulosic fibers are regenerated cellulose fibers.