JP4071533B2 - Sewing products with a worn out appearance - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a composite false twisted yarn and a woven / knitted fabric made of polyester fiber capable of expressing a natural spot appearance, a worn appearance, and a natural color fading, and a sewn product having a worn appearance.
[0002]
[Prior art]
Traditionally, denim-like products made of natural fibers and dungarees have been accepted by a wide range of age groups due to their unique worn appearance and natural color fading. These worn out appearances and the naturalness of discoloration are obtained as a result of partial washing of the fabric by a washing process called stone wash and repeated wear and washing by consumers.
[0003]
In contrast, textile products made of polyester have the advantage of not fading due to washing or the like, but usually have a problem that they are worn out and it is difficult to express the appearance and the naturalness of the fading.
[0004]
For this reason, for example, Japanese Patent Laid-Open No. 7-173766 proposes an attempt to impart an appearance and a natural color fading to a textile product made of polyester. In this method, a fabric is formed using a seascore type composite fiber having a dull luster whose core portion is lighter or unstained than the sheath portion, and the fabric is whitened by alkali weight reduction processing.
[0005]
However, in this method, although it is possible to partially whiten the fabric, the entire fabric is uniformly whitened, and natural spots, worn appearance, which are characteristic of denim-like products and dungarees, The naturalness of discoloration could not be expressed sufficiently, and a solution was desired.
[0006]
[Problems to be solved by the invention]
The present invention has been made to solve the above-described problems of the prior art, and the problem is to express the natural spot appearance, the worn appearance, and the naturalness of color fading, which are characteristic of denim-like products and dungarees. An object of the present invention is to provide a composite false twisted yarn and a woven / knitted fabric made of polyester fiber, and a sewn product having an worn appearance.
[0007]
[Means for Solving the Problems]
As a result of diligent studies to achieve the above-mentioned problems, the inventors of the present invention have a polyester seascore type thick and thin film made of polyester having a specific thick and thin ratio and having a sheath part and a core part having different dyeing properties. A desired composite false twisted yarn and woven or knitted fabric are obtained by simultaneously subjecting a polyester multifilament composed of a composite fiber and a polyester multifilament made of polyester having the same dyeability as the polyester forming the sheath portion to a composite false twist. In addition, the present inventors have arrived at the present invention by knowing that a sewn product having an worn out appearance can be obtained and by further intensive studies.
[0008]
Thus, according to the present invention, “the filament has a fine cross-sectional area ratio α of 0.35 to 0.95 in the yarn length direction, and the sheath portion and the core portion have different dyeing properties. The polyester multifilament (A), which is a polyester sea core type fine composite fiber made of polyester, and the polyester multifilament (B) made of polyester having the same dyeability as the polyester forming the sheath part are composite false twisted Composite false twisted yarn characterized by being made A sewn product that is sewn using at least a woven or knitted fabric that contains a knitted fabric, and is characterized in that, after being sewn, convex portions and edge portions of the sewn product are selectively subjected to alkali weight reduction processing. Sewing product with a worn out appearance. Is provided.
[0009]
At that time, the composite false twisted yarn is composed of a core-sheath structure portion in which the polyester multifilament (A) is located in a sheath portion, and the polyester multifilament (B) is located in a core portion, and the polyester multi-filament yarn. It is preferable that the filament (A) and the polyester multifilament (B) have an alignment structure portion that is aligned while being mixed with each other. Moreover, it is preferable that the said sheath part consists of a cation dyeable polyester, and the said core part consists of a cation non-dyeable polyester. Further, in the polyester-based seascore type fine composite fiber, the core part has one or a plurality of core parts, and the cross-sectional area ratio β between the cross-sectional area of the sheath part and the total cross-sectional area of the core part is 0.1 to 1.0. It is preferable.
[0011]
At this time, it is preferable that at least the thick part of the polyester-based seascore type thick composite fiber, the sheath part is partially removed and the core part is exposed.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
First, in one polyester multifilament (A) constituting the composite false twisted yarn of the present invention, the filament (single yarn fiber) has a dyeing property in the sheath part (sheath part) and the core part (core part). It consists of different polyester seascore type composite fibers. The polyester forming such a polyester seascore type composite fiber may be a known polyester or modified polyester typified by polyethylene terephthalate or polytrimethylene terephthalate, but the sheath part and the core part must have different dyeing properties.
[0014]
Here, different dyeability means, for example, that (a) if the sheath part is cation-dyeable, the core part is cation-undyed, and conversely (b) if the sheath part is cation-undyed. This means that the core part is cationically dyeable. In the present invention, either case (a) or (b) may be used. However, in order to obtain the worn out appearance described later, (a) the sheath part is cation-dyeable and the core part is cation-undyed. Preferably there is. Such cationic dyeing can be obtained with a normal metal-sulfonate isophthalic acid-modified polyester or the like.
[0015]
In addition, a fine hole (or fine groove) is formed in the sheath part and / or the core part by forming a fine hole or a fine groove on the fiber surface or inside the fiber by a matting agent or alkali reduction treatment. An agent may be included. In particular, the core portion preferably contains inorganic fine particles such as titanium oxide so as to have a semi-dull gloss or a dull gloss.
[0016]
The sea core type according to the present invention may be a single core type as illustrated in FIG. 1 or a multi-core type as illustrated in FIG. Further, it may be a single-core type with a positive core (concentric) or a single-core type with an eccentricity (eccentricity). Further, even if a part of the core is exposed on the surface, it is acceptable as long as it is within the range where the worn out appearance which is one of the main objects of the present invention is not impaired. Of these, in consideration of stability and reproducibility in mass production, a single-core type or a multi-core type is preferable.
[0017]
Moreover, it is preferable that cross-sectional area ratio (beta) of the said sheath part cross-sectional area and core part cross-sectional total area is 0.1-1.0 (more preferably 0.1-0.5). Here, the cross-sectional area ratio β is expressed by the following equation.
β = (Sheath cross section) / (Total cross section of core cross section)
However, the sheath cross-sectional area is obtained by removing the cross-sectional area of the core from the cross-sectional area of the composite fiber (filament). When the core part is a multi-core type, the total cross-sectional area of the core part cross section is the sum of the cross-sectional areas of the core parts.
[0018]
If the cross-sectional area β is smaller than 0.1, the spinning stability may be impaired. On the contrary, if the cross-sectional area β is larger than 1.0, the yarn strength may be lowered after the weight reduction processing described later is performed.
[0019]
In the above-mentioned composite fiber, the cross-sectional shape of the composite fiber and the cross-sectional shape of the core part are selected from arbitrary shapes such as a circle, a triangle, a square, a flat shape, and a hollow shape. Moreover, the cross-sectional shape of the composite fiber and the cross-sectional shape of the core part may be the same or different.
[0020]
Next, the above-mentioned conjugate fiber needs to have a fineness of 0.35 to 0.95 (preferably 0.5 to 0.8) with a fine and thin cross-sectional area ratio α in the yarn length direction. Here, the thick and thin cross-sectional area ratio α is expressed by the following equation.
α = (detail cross section) / (thick cross section)
However, it cut | disconnects perpendicular | vertical to a fiber axis direction, the cross section is observed with an electron microscope, cross-sectional area is measured by n number 20, and it represents with the average value.
[0021]
When the thick / thin cross-sectional area ratio α is smaller than 0.35, the yarn strength may be lowered, which is not preferable. On the other hand, when the thick / small cross-sectional area ratio α is larger than 0.95, it is not preferable because a natural spot appearance which is one of the main objects of the present invention cannot be obtained.
[0022]
In the composite fiber, the length of the thick portion is preferably 5 to 170 mm (more preferably 8 to 130 mm), and the length of the details is preferably 5 to 170 mm (more preferably 8 to 130 mm).
[0023]
Such thick and thin can be obtained by ordinary spot drawing, in which a polyester undrawn yarn is spun or once wound and then subjected to low magnification drawing and heat treatment. The thick and fine yarn may be a so-called thick and thin yarn, or may be, for example, a dispersed patch drawn yarn described in Japanese Patent Publication No. 3-79450. In such thick yarns, the thick portion is usually low-oriented and high in elongation, while the details are high-oriented and low in elongation.
[0024]
In this invention, a polyester multifilament (A) is comprised with the filament which consists of said polyester sea core type | mold composite fiber. The total fineness, single yarn fineness, and number of filaments of the polyester multifilament (A) are not particularly limited, but are 30 to 300 dtex, 0.6 to 10 dtex, and 10 to 50 in terms of texture and productivity, respectively. Is preferred. Further, the average elongation of the polyester multifilament (A) is preferably 80 to 220% (more preferably 120 to 180%) in order to obtain the core-sheath structure described later. In addition, this polyester multifilament (A) needs to be a long fiber (multifilament) in order to obtain the composite false twisted yarn mentioned later, and a short fiber is not preferable.
[0025]
Next, the other polyester multifilament (B) constituting the composite false twisted yarn of the present invention needs to be formed of polyester having the same dyeability as the sheath portion of the polyester multifilament (A). For example, if the sheath portion is cationically dyeable, the polyester multifilament (B) must also be cationically dyeable. Conversely, if the sheath portion is cationically non-dyed, the polyester multifilament (B) is also cationic. Must be dyeable. In particular, it is preferable that the sheath portion and the polyester multifilament (B) are both cation-dyeable in order to obtain the worn appearance described later.
[0026]
Although it does not specifically limit as polyester which forms this polyester multifilament (B), as long as the said sheath part and dyeing | staining property are made the same, The same polyester as the said sheath part is used suitably. Moreover, the above-mentioned additives can be used as appropriate.
[0027]
The total fineness, single yarn fineness, and number of filaments of the polyester multifilament (B) are not particularly limited, but are 30 to 300 dtex, 0.6 to 10 dtex, and 10 to 50 in terms of texture and productivity, respectively. preferable. Further, the polyester multifilament (B) is preferably a drawn yarn having an elongation of 5 to 50% (more preferably 20 to 40%) in order to obtain a core-sheath structure described later. In addition, this polyester multifilament (B) needs to be a long fiber (multifilament) in order to obtain the composite false twisted yarn mentioned later, and a short fiber is not preferable.
[0028]
Next, the composite false twisted yarn of the present invention is obtained by subjecting the polyester multifilament (A) and the polyester multifilament (B) to composite false twist.
[0029]
As such composite false twisting, for example, a heat treatment heater in which polyester multifilament (A) and polyester multifilament (B) are aligned and the first roller is set at a temperature of 90 to 220 ° C. (more preferably 100 to 190 ° C.). The method of twisting by the twisting device via is illustrated.
[0030]
At this time, in order to impart conjugation to the composite false twisted yarn and improve handling, it is preferable to give air entanglement (interlace processing or taslan processing) before or after the first roller before false twisting. . Such air entanglement may be applied after false twisting and before winding.
[0031]
In addition, the draw ratio during false twisting is preferably in the range of 0.8 to 1.5, and the false twist is α = in the formula of false twist (T / m) = (32500 / √Dtex) × α. 0.5-1.5 is preferable and it is good to set it as 0.8-1.2 rank normally. As the twisting device to be used, a disk-type or belt-type frictional twisting device is suitable because it is easy to thread and there is little yarn breakage, but a pin-type twisting device may also be used.
[0032]
The uneven stretching and the composite false twisting may be performed in a series of steps or in different steps.
[0033]
In the composite false twisted yarn of the present invention, the fineness ratio (DA / DB) of the fineness DA of the polyester multifilament (A) and the fineness DB of the polyester multifilament (B) is not particularly limited, but is 0.2 to 3.0 ( More preferably, the range of 0.5 to 1.5) is appropriate. The composite false twisted yarn of the present invention contains other yarns as long as it is within the range that does not impair the natural spotted appearance, the worn out appearance, and the color fading that are the main objects of the present invention. It doesn't matter.
[0034]
In the composite false twisted yarn of the present invention, the polyester multifilament (A) is located in the sheath, while the polyester multifilament (B) is located in the core, and the polyester multifilament ( In order to obtain a more excellent natural spot appearance, it is preferable that A) and the polyester multifilament (B) have an alignment structure portion that is aligned while being mixed with each other. The lengths of the core-sheath structure part and the alignment structure part are 5 to 170 mm (more preferably 8 to 130 mm), respectively, and the alignment structure part 5 to 170 mm (more preferably 8 to 130 mm). preferable. In addition, the fiber-mixing form of a core-sheath structure part and the alignment structure part is typically shown in FIG.
[0035]
Here, if the elongation of the thick part of the polyester multifilament (A) is higher than that of the polyester multifilament (B), the polyester multifilament (A) is located in the sheath, and the polyester multifilament (A) A highly crimped core-sheath structure part in which the filament (B) is located in the core part is formed. When the sheath part of the polyester multifilament (A) (polyester sea core type fine composite fiber) is cationically dyeable, the thick part has a thick sheath part and a low orientation when dyed with a cationic dye. Because of this, it is dyed dark.
[0036]
On the other hand, if the elongation of the details of the polyester multifilament (A) is about the same as the elongation of the polyester multifilament (B), the polyester multifilament (A) and the polyester multifilament (B) are drawn while being mixed with each other. An aligned, low crimped alignment structure is formed. And when the sheath part of the polyester multifilament (A) (polyester seascore type thick fine fiber) is cationic dyeable, when the dye is dyed with a cationic dye, the details are thin and highly oriented in the sheath part. Therefore, it is dyed lightly.
[0037]
The false twisted composite yarn having the core-sheath structure portion and the alignment structure portion has the average elongation of the polyester multifilament (A) and the elongation of the polyester multifilament (B) within the above ranges, and is a composite temporary yarn. It can be obtained by appropriately selecting the twisting conditions within the above range.
[0038]
The composite false twisted yarn of the present invention has a difference in density due to the thickness of the sea core type composite fiber, and a patch appearance due to composite false twist processing of different types of multifilaments having specific dyeability. Further, when the core-sheath structure portion and the alignment structure portion are included, the color of the polyester multifilament (A) and the polyester multifilament (B) made of the seascore-type thick and fine composite fibers can be changed by changing the form of the fibers. It will have both changes and changes in the degree of crimp, resulting in a better natural spot appearance.
[0039]
Next, according to the present invention, there is provided a woven or knitted fabric characterized by comprising at least (preferably, 30% by weight or more) of the composite false twisted yarn. Here, the composite false twisted yarn is used alone or as a composite yarn with other fibers (polyester fiber, nylon fiber, natural fiber, etc.), and then processed yarn, spun yarn, twisted yarn, etc. as necessary. It is made into the form of fabrics, such as a knitted fabric and a nonwoven fabric, which are known fiber aggregates. As the woven structure of the woven fabric, plain weave, twill weave, satin weave, or a changed structure thereof is preferably used. As the knitted fabric, any of circular knitted fabric such as smooth fabric, weft knitted fabric, warp knitted fabric and the like can be used. Since the composite false twisted yarn has a natural patch appearance as described above, the woven or knitted fabric using at least the composite false twisted yarn has natural spots even before it is subjected to alkali weight reduction processing. It has an appearance.
[0040]
Furthermore, by subjecting the woven or knitted fabric to an alkali weight reduction process, the thick part (low orientation part) of the polyester-based seascore type fine composite fiber is selectively reduced compared to the details (high orientation part) of the composite fiber. Is done. As a result, in the thick part, the sheath part is partially removed and the core part is exposed. That is, when dyed with only a cationic dye, the portion that was a dark color before the alkali reduction is whitened by the alkali reduction. As a result, in addition to the natural spotted appearance, an worn out appearance and a discolored appearance are added.
[0041]
Such alkali weight reduction processing is preferably performed before the dyeing processing step as usual. Further, the weight loss rate of the alkali weight reduction can be appropriately selected according to the cross-sectional area ratio between the sheath portion and the core portion of the sea core type composite fiber, and is particularly limited. It is not a thing. By setting the weight loss rate, it is possible to arbitrarily express a favorite spot appearance, an worn appearance, and a color fading appearance.
[0042]
Next, at least the woven or knitted fabric is used as a sewn product, and the convex part and the edge part of the sewn product are selectively subjected to alkali weight reduction to obtain a sewn product having an worn appearance. Here, “selective” means that the weight loss rate of the convex part and the edge part is higher than other parts, and even if the entire sewing product is subjected to weight reduction processing, it is acceptable. Further, the woven or knitted fabric before sewing may be subjected to weight reduction processing, but it is preferable that the weight reduction processing is not performed. In addition, the convex part and edge part of a sewing product here are the seam part of a sewn product, the periphery of a seam part, a belt loop part, etc.
[0043]
As a method of selectively performing alkali weight reduction processing on the convex part and edge part of such a sewing product, in the conventional alkali weight reduction processing method, a plurality of sewing products are added simultaneously, or a stone for abrasion is added together with the sewing product. The method of doing is illustrated.
[0044]
By applying the weight reduction processing to the sewing product, it is possible to add a natural appearance and fading to the sewing product. As a result, such a sewn product has a natural spotted appearance, a worn out appearance, and a natural color fading characteristic of denim-like products and dungare shirts.
[0045]
In addition, it does not specifically limit as a dye at the time of dyeing the woven / knitted fabric and sewing product of this invention, It can select arbitrarily. For example, if only a cationic dye is used, a natural spot appearance, an worn appearance, and an appearance having a natural color fading can be obtained, and if a disperse dye having a color different from that of the cationic dye is used together with the cationic dye, exposure is caused by an alkali weight loss. Various appearances are obtained, in which only the color of the core portion is changed. Such a dyeing process may be performed before sewing, or may be performed after sewing.
[0046]
【Example】
Next, although the Example and comparative example of this invention are explained in full detail, this invention is not limited by these.
[0047]
[Example 1]
First, a modified polyethylene terephthalate polymer copolymerized with 2.6 mol% of 5-sodium sulfoisophthalic acid, which is a cationic dye, is used as a sheath part, and on the other hand, a normal cation-undyeable polyethylene terephthalate polymer having a dull luster (oxidation) Polyester sea core type having a core-shaped cross section (cross-sectional area ratio β = 0.25) as illustrated in FIG. 1 by a conventional conjugate spinning method with a titanium content of 2.5% by weight as a core part. An undrawn composite fiber of 145 dtex / 36 fil was obtained.
[0048]
On the other hand, using a modified polyethylene terephthalate polymer obtained by copolymerizing 2.6 mol% of 5-sodium sulfoisophthalic acid which is a cationic dye, a polyester multifilament (B) drawn yarn 84 dtex / 24 fil (elongation 30%) was obtained.
[0049]
Next, the polyester seascore type composite fiber undrawn yarn 145 dtex / 36 fil was subjected to a conventional thick and thin process, and a polyester multifilament (A) 125 dtex / 36 fil (average elongation 140%, the thick cross-sectional area ratio α = 0.64, the length of the thick part is 10 to 80 mm, the length of the detail is 10 to 60 mm), and the polyester multifilament (A) and the polyester multifilament (B) are aligned and subjected to interlace processing. After that, conventional composite false twisting (disk type twisting device, heat setting temperature 160 ° C., draw ratio 1.0, false twist number 2100 T / m) was performed to obtain a composite false twisted yarn. The obtained composite false twisted yarn had a core-sheath structure part (13-80 mm) and an alignment structure part (10-60 mm). The above thick and thin processing and composite false twisting were performed in a series of steps.
[0050]
Next, the composite false twisted yarn was used for warp and weft to obtain a woven or knitted fabric (C) having a plain structure (warp density 149 / 3.79 cm, weft density 103 / 3.79 cm).
[0051]
The fabric (C) was dyed in a conventional manner without being subjected to alkali weight loss processing. Such woven fabrics are composed of thick and thin seascore-type thick composite fibers, color changes due to changes in the mixed form of polyester multifilament (A) and polyester multifilament (B), and changes in crimping degree. It was a fabric having a natural spot appearance.
[0052]
The fabric (C) was subjected to alkali weight loss processing (weight loss rate 9%) to expose the core portion in the thick portion of the polyester seascore type thick composite fiber, and then subjected to dyeing processing in the usual manner The obtained fabric had not only a natural spot appearance but also a natural worn appearance and a natural color fading.
[0053]
Further, a sewn product is made using the woven fabric (C), and a stone for rubbing is added to the sewn product together with the sewn product and subjected to alkali weight reduction processing (weight loss rate 5%). The part and edge part were selectively subjected to alkali weight reduction processing. Then, when the conventional dyeing process was applied to the sewn product subjected to the alkali weight reduction process, the sewn product had not only a natural spotted appearance but also a full-fledged worn appearance and a natural color fading. It was.
[0054]
[Example 2]
In Example 1, composite false twisting was performed in the same manner as in Example 1 except that the multi-filament (A) was subjected to thick and thin processing at the spinning stage, so that it was separated from the composite false twisting process. I got a thread. The obtained composite false twisted yarn had a core-sheath structure part (12-100 mm) and an alignment structure part (15-80 mm).
[0055]
Next, the composite false twisted yarn was used as warp and weft to obtain a woven or knitted fabric (D) having a plain structure (warp density: 149 / 3.79 cm, weft density: 103 / 3.79 cm).
[0056]
The fabric (D) was subjected to a conventional dyeing process without being subjected to alkali weight reduction. Such woven fabrics are composed of thick and thin seascore-type thick composite fibers, color changes due to changes in the mixed form of polyester multifilament (A) and polyester multifilament (B), and changes in crimping degree. It was a fabric having a natural spot appearance.
[0057]
The fabric (D) was subjected to alkali weight loss processing (weight loss rate 9%) to expose the core portion in the thick portion of the polyester seascore type fine composite fiber, and then subjected to dyeing processing in the usual manner The obtained fabric had not only a natural spot appearance but also a natural worn appearance and a natural color fading.
[0058]
Further, a sewn product is made using the fabric (D), and a stone for rubbing is added to the sewn product together with the sewn product to perform an alkali weight reduction process (a weight loss rate of 5%). The part and edge part were selectively subjected to alkali weight reduction. Then, when the conventional dyeing process was applied to the sewn product subjected to the alkali weight reduction process, the sewn product had not only a natural spotted appearance but also a full-fledged worn appearance and a natural color fading. It was.
[0059]
[Example 3]
In Example 1, the core part is formed of a normal cationic dye-free polyethylene terephthalate polymer having a semi-dull luster (content of titanium oxide: 0.4% by weight) and has a multi-core cross-sectional shape as illustrated in FIG. A composite false twisted yarn was obtained in the same manner as in Example 1 except that the polyester multifilament (A) was composed of a polyester seascore type composite fiber having a cross-sectional area ratio β = 0.43. The obtained composite false twisted yarn had a core-sheath structure part (9-90 mm) and an alignment structure part (10-50 mm).
[0060]
Next, the composite false twisted yarn was used for warp and weft to obtain a plain-textured fabric (E) as a woven or knitted fabric (warp density: 149 / 3.79 cm, weft density: 103 / 3.79 cm).
[0061]
The fabric (E) was dyed in a conventional manner without being subjected to alkali weight reduction. Such woven fabrics are composed of thick and thin seascore-type thick composite fibers, color changes due to changes in the mixed form of polyester multifilament (A) and polyester multifilament (B), and changes in crimping degree. It was a fabric having a natural spot appearance.
[0062]
The fabric (E) was subjected to alkali weight loss processing (weight loss rate 9%) to expose the core portion of the thick portion of the polyester seascore type fine composite fiber, and then subjected to dyeing processing in the usual manner The obtained fabric had not only a natural spot appearance but also a natural worn appearance and a natural color fading.
[0063]
Further, a sewn product is made using the woven fabric (E), and a stone for rubbing is added to the sewn product together with the sewn product and subjected to an alkali weight reduction process (weight loss rate 5%). The part and edge part were selectively subjected to alkali weight reduction. Then, when the conventional dyeing process was applied to the sewn product subjected to the alkali weight reduction process, the sewn product had not only a natural spotted appearance but also a full-fledged worn appearance and a natural color fading. It was.
[0064]
[Comparative Example 1]
In Example 1, as polyester multifilament (A), a polyester undrawn yarn of 145 dtex / 36 fil which is made of a modified polyethylene terephthalate polymer copolymerized with 2.6 mol% of 5-sodium sulfoisophthalic acid which is a cationic dye is chic. A composite false twisted yarn and a woven fabric were obtained in the same manner as in Example 1 except that the one subjected to andcin processing was used.
[0065]
Although the polyester multifilament (A) is thick and thin, there are no shades of shade, so the resulting fabric did not have a natural spot appearance.
[0066]
Moreover, even when such a woven fabric is subjected to an alkali weight reduction process, it has not been possible to express the natural appearance and color fading.
[0067]
Further, a sewn product was made using the above-mentioned woven fabric that had not been subjected to alkali weight reduction processing, and was subjected to alkali weight reduction processing in the same manner as in Example 1, but it was fully worn and expresses the natural appearance and color fading. I couldn't.
[0068]
[Comparative Example 2]
In Example 1, a composite false twisted yarn and a woven fabric were obtained in the same manner as in Example 1 except that the polyester multifilament (A) was not subjected to thick and thin processing.
[0069]
Since the polyester multifilament (A) does not have thick or light colored spots, the resulting woven fabric did not have a natural spot appearance.
[0070]
Further, even when the fabric was subjected to alkali weight reduction processing, the entire fabric was whitened, and it was not possible to express the natural wear and appearance and the natural color fading.
[0071]
Further, a sewn product was made using the above-mentioned woven fabric that had not been subjected to alkali weight reduction processing, and was subjected to alkali weight reduction processing in the same manner as in Example 1, but it was fully worn and expresses the natural appearance and color fading. I couldn't.
[0072]
[Comparative Example 3]
In Example 1, false twisted yarn and woven fabric were obtained using only the polyester multifilament (A) without using the polyester multifilament (B).
[0073]
Although the polyester multifilament (A) has thick and light colored spots, there is no change in the crimped form, and thus the resulting fabric did not have a natural spot appearance.
[0074]
In addition, when alkali weight reduction processing is applied to such fabrics, the thick part of the multifilament (A) is selectively whitened, resulting in an artificial appearance, expressing a natural worn out appearance and the natural color fading. could not.
[0075]
Further, a sewn product was made using the above-mentioned woven fabric that had not been subjected to alkali weight reduction processing, and was subjected to alkali weight reduction processing in the same manner as in Example 1, but it was fully worn and expresses the natural appearance and color fading. I couldn't.
[0076]
【The invention's effect】
According to the present invention, a composite false twisted yarn and a woven / knitted fabric made of polyester fiber that can express the natural spot appearance, the worn appearance, and the color fading characteristic of denim-like products, dungarees, etc., and sewing having an worn appearance. Goods can be obtained.
[Brief description of the drawings]
FIG. 1 schematically shows a cross section of a single-core type composite fiber that can be used in the present invention.
FIG. 2 schematically shows a cross section of a multi-core type composite fiber that can be used in the present invention.
FIG. 3 (1) schematically shows a core-sheath structure.
(2) The alignment structure portion is schematically shown.
[Explanation of symbols]
1 Sheath part
2 Core part
3 Sheath part
4-1 Core part
4-2 Core part
5 Polyester multifilament (A)
6 Polyester multifilament (B)

Claims (5)

Polyester sea core type thick filaments made of polyester whose filaments have a fine cross-sectional area ratio α of 0.35 to 0.95 in the yarn length direction, and the sheath part and the core part have different dyeing properties. A composite comprising a polyester multifilament (A), which is a composite fiber, and a polyester multifilament (B) made of polyester having the same dyeability as that of the polyester forming the sheath part. A sewn product that is sewn using at least a woven or knitted fabric that includes false twisted yarn, and after being sewn, a convex portion and an edge portion of the sewn product are selectively subjected to alkali weight reduction processing. A sewn product with a worn out appearance characterized by that. The composite false twisted yarn has a core-sheath structure part in which the polyester multifilament (A) is located in a sheath part, while the polyester multifilament (B) is located in a core part, and the polyester multifilament (A). The sewn product having an worn appearance according to claim 1, wherein the polyester multifilament (B) has an aligning structure portion that is aligned while being mixed with each other . The sewn product having a worn appearance according to claim 1 or 2, wherein the sheath portion is made of a cationic dyeable polyester, and the core portion is made of a cationic non-dyeable polyester . The polyester sea core type fine composite fiber has one or more core parts, and a cross-sectional area ratio β between the cross-sectional area of the sheath part and the total cross-sectional area of the core part is 0.1 to 1.0. A sewn product having an worn appearance according to any one of . The sewn product having an worn appearance according to any one of claims 1 to 4, wherein the sheath part is partially removed and the core part is exposed at least in a thick part of the polyester seascore type fine composite fiber.

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