JP5221628B2 - Long and short composite spun yarn fabrics and products - Google Patents

Description

  The present invention uses at least a part of a twin yarn or triplet yarn in which long and short composite spun yarns obtained by superimposing twisted short fiber bundles and opened synthetic fiber multifilament yarns and twisting them together are twisted. The present invention relates to a high-performance woven fabric that retains a good texture and softness suitable for school uniforms and uniforms, and is durable and, in particular, a high-performance woven fabric without dimensional changes and fluff after repeated washing.

  Conventionally, as a means for enhancing the durability of a fabric while taking advantage of the characteristics of natural fibers, a method of combining synthetic fiber filaments with natural fibers (for example, see Patent Document 1) or a method of blending synthetic fiber staples with natural fibers ( For example, see Patent Document 2).

Japanese Patent Laid-Open No. 10-226938 JP 2001-11749 A

  Long and short composite spun yarns composed of natural fibers and synthetic fiber staples and synthetic fiber multifilaments are widely used for jerseys and textiles because of their excellent durability and light weight. In particular, long and short composite spun yarns composed of wool and synthetic fiber multifilaments are usually finely twisted and strongly twisted, so that a strong woven fabric with improved breathability and lightness can be obtained. It is used for suits and formal suits for spring and summer. Further, in the weaving process of woolen fabric, non-glue weaving is generally used, and the twisted yarns of the worsted yarn and various filaments are not glued and the number of twists is increased to form a strong twist and weaving is generally performed.

  Accordingly, fabrics using long / short composite spun yarns and woven yarns of various types of lashed yarns and various filaments are preferably used for spring / summer materials, but are rarely used for autumn / winter materials because of their hard texture.

  Furthermore, blending synthetic fiber staples with natural fiber materials is not only used in the cotton spinning field, but also in the wool spinning field, that is, in the wide range of the woolen spinning and woolen spinning fields. It is implemented for the purpose of down. In particular, fabrics using blended yarns of wool and polyester fibers are widely used for uniforms and school uniforms because of their high durability.

  However, the conventional woven fabrics composed of long and short composite spun yarns and blended yarns and polyester yarns of wool and polyester fibers have achieved results to some extent in terms of improving wear resistance during use, but are good after wearing and washing. However, there is a problem with the holding power, the dimensional change rate and the occurrence of fuzzing, and the demand for improvement in this respect is extremely large, but no measures have been established yet.

  The present invention has been achieved as a result of intensive studies on the background of such circumstances, and is a woven fabric suitable for school uniforms and uniforms, particularly school uniforms. The durability of the laundry, in particular, texture change and fluff after repeated washing. An object of the present invention is to provide a high-performance woven fabric with a small amount of dimensional change and a small dimensional change rate.

  The above-mentioned means for solving the problem, that is, the configuration of the present invention is a twin yarn or triplet in which two to three long and short composite spun yarns in which synthetic fiber multifilaments and short fibers are uniformly mixed are aligned and twisted. It is a woven fabric using yarn at least in part, and it is particularly desirable that one side of the woven fabric is baked.

  The means for uniformly mixing the long and short composite spun yarns is preferably by electrospreading.

  In the woven fabric of the present invention, a twin yarn or triplet yarn in which two or three long and short composite spun yarns are aligned and twisted as a woven yarn is used, and in particular, the twist coefficient of a single yarn before twisting of the long and short composite spun yarns Is preferably 40-100.

It is desirable that the fabric weight (g / m ² ) is around twice the fabric cover factor (CF).

  The woven fabric of the present invention is a woven fabric using at least a part of a yarn obtained by aligning two to three long and short composite spun yarns in which synthetic multifilaments and short fibers are uniformly mixed and twisted. Surprisingly, it is possible to obtain a stable woven fabric that retains the original excellent texture, is less fuzzed, and has a low dimensional change rate.

It is the schematic of the manufacturing apparatus of the long and short composite spun yarn used for the textile fabric of this invention.

  The long and short composite spun yarn used in the fabric of the present invention is preferably a composite spun yarn in which synthetic multifilaments and short fibers are uniformly mixed in order to achieve the washing durability of the fabric. As a method of uniformly mixing the synthetic fiber multifilament and the short fiber, an electric fiber opening method or a scraping method can be adopted. However, in order to maintain a stable fiber opening state, the short fiber and the synthetic fiber multifilament are uniformly mixed. The electrospreading method is particularly preferable in order to realize the ideal state.

  The synthetic fiber multifilament forming the long and short composite spun yarn used in the fabric of the present invention is preferably a polyester multifilament, and typically includes polyethylene terephthalate multifilament, polytrimethylene terephthalate multifilament, and polybutylene terephthalate multifilament. . Here, when the synthetic fiber is a polyamide fiber, there is a problem that heat resistance is lowered, and there is a tendency to cause shrinkage of the fabric in the fabric arranging process, the process of thermally bonding the interlining, or the pressing process.

  The fineness (decitex) of the synthetic fiber multifilament yarn forming the long and short composite spun yarn used in the fabric of the present invention is preferably 11 to 110 dtex, more preferably 17 to 84 dtex. Here, when the fineness of the multifilament yarn exceeds 110 dtex, it is not preferable because the original texture of the short fiber tends to be impaired. On the other hand, if it is less than 11 decitex, the harmony with short fibers is affected, which is not preferable.

  The single yarn fineness (decitex) of the multifilament is preferably 0.1 to 6.6 dtex, more preferably 0.2 to 3.3 dtex. When the single filament fineness of the multifilament is less than 0.1 dtex, the waist becomes weak when made into a woven fabric, while when it exceeds 6.6 dtex, it becomes hard when made into a woven fabric. This is not preferable.

  The short fiber forming the long and short composite spun yarn used for the woven fabric of the present invention is preferably at least one fiber selected from wool, cotton, silk, hemp, polyester-based synthetic fiber staple, rayon staple, acetate staple and the like. .

  In particular, in applications such as school uniforms and uniforms, it is used as a blend of wool alone or wool (also called wool) and polyester staples in terms of wear resistance and durability caused by the wearer's intense movements. Is preferred.

  The long and short composite spun yarn used in the woven fabric of the present invention has a great influence on the physical properties of the fabric due to the composite ratio of long fibers and short fibers, and preferably the proportion of short fibers accounted for 50 to It is 95% by weight, more preferably 60 to 90% by weight. Here, when the amount is less than 50% by weight, the entanglement between the short fiber and the multifilament is adversely affected. On the other hand, if it exceeds 95%, the effect of reinforcing the physical properties of the woven fabric by the multifilament is not preferable.

  The long and short composite spun yarn used for the woven fabric of the present invention is a composite spun yarn obtained by electrically opening a synthetic fiber multifilament yarn and superimposing the drafted short fiber bundle (also called short fiber fleece) just before the front roller. Can be manufactured.

  The opening width of the synthetic fiber multifilament is preferably equal to or greater than the maximum width of the short fiber fleece.

  Determination of the supply position of the synthetic fiber multifilament and the short fiber fleece can be adjusted by using the position of the opened electrode or a dedicated guide for the opened filament. The opening width of the synthetic fiber multifilament is adjusted by adjusting the opening voltage, supply tension, filament dedicated guide, etc.

  The long and short composite spun yarn used for the fabric of the present invention can be produced, for example, using the apparatus shown in FIG. That is, according to FIG. 1, the apparatus has a back roller 1, a cradle 2, and a front roller 3 arranged in this order, and a winding device having a snell wire 4 below the front roller 3 and a ring and a traveler 5 below. Further, an opening electrode 6 for applying static electricity from above is provided above the feeding side of the front roller 3 and an annular guide 7 is provided below the opening electrode 6.

  Next, preferred production examples of long and short composite spun yarn will be described. First, the multifilament yarn A taken up by the PAN 8 is released, the guide 9 is passed through, the static electricity is applied and opened by the spread electrode 6, and the front roller is then controlled through the annular guide 7 while controlling the spread width and supply position. 3 is supplied. On the other hand, the roving yarn B is supplied to the back roller 1, drafted between the cradle 2 and the front roller 3, and supplied to the front roller 3 as a fleece short fiber bundle B. The opened multifilament yarn A and the fleece short fiber bundle B supplied to the front roller 3 are mixed at the nip point of the front roller 3. At this time, the spread width of the multifilament is set to be equal to or greater than the maximum width of the short fiber fleece, and the center of the opened multifilament is overlapped and mixed with the center of the short fiber fleece. The multifilament and the short fiber fleece that have passed through the front roller 3 are twisted to keep the cross section uniformly mixed, and are wound around the tube yarn 10 by the ring traveler 5 via the snell wire 4. At this time, the yarn is twisted with a twist coefficient of 40 to 100. The long and short composite spun yarn obtained in this way is further twisted by twisting 2 to 3 yarns with a twisting factor of 50 to 110, so as to form so-called twin yarns, triplet yarns, etc., and then subjected to a weaving process.

  The long and short composite spun yarn used for the woven fabric of the present invention is twisted by aligning two or three long and short composite spun single yarns to form twin yarns or triplet yarns. Since conventional woven fabrics are generally woven without gluing during weaving, long and short composite spun yarns, and twisted yarns of single lashed yarns and various filaments should also be twisted by increasing the number of twists. I needed it. Accordingly, the texture of the fabric becomes hard, and it is not particularly suitable for use in autumn and winter. However, in the present invention, the above-mentioned problem of the texture of the conventional product is solved by setting the number of twists of the single yarn of the long and short composite spun yarn to be a sweet twist compared to the conventional product.

  The twist coefficient of the long and short composite spun yarn used for the fabric of the present invention, that is, the starting raw yarn, is 40 to 100, more preferably 55 to 85. When the twist coefficient is less than 40, the spinnability tends to decrease, and when used in a woven fabric, the occurrence of pilling tends to increase, such being undesirable. On the other hand, if it exceeds 100, the problem of spinnability and pilling is solved, but the texture of the fabric becomes hard.

  If you use single yarns of long and short composite spun yarns, the above-mentioned coefficient of sweet twist causes problems in weaving properties, but by twisting 2 to 3 single yarns, problems such as weaving properties and occurrence of pilling are solved. The

  It is preferable that the twist coefficient is 50 to 110 when two to three or more long and short composite spun yarns (starting raw yarns) used in the woven fabric of the present invention are aligned and twisted. If the twisting coefficient at this time is less than 50, fluff is liable to occur and the weaving property is deteriorated, which causes a problem of pilling. If it exceeds 110, the yarn is tightened and the texture tends to become hard, which is not preferable. A more preferable range of the twist coefficient is 60 to 90.

  The range of the cover factor (CF) of the fabric of the present invention is not particularly limited, but is preferably 75.0 to 130.0, and more preferably 80.0 to 125.0. If it is below 75, the tension and durability of the entire fabric is insufficient, so application to a uniform or school uniform is not preferable. On the other hand, if it exceeds 130, the durability tends to be improved, but the texture becomes hard and the wearing comfort is lowered, so that it is not suitable for the intended textile use.

In particular, the preferred region of the fabric cover factor varies with the fabric texture.
For example, in the case of plain weave, twill, and surge, the following regions are particularly preferable.
Plain weave 75.0-90.0
2/1 twill 95.0-125.0
2/2 Surge 110.0-130.0
Plain weave is the most stable structure, so it can maintain its shape as a woven fabric even with a small number of drivings, and can minimize dimensional changes and deformation after washing. It is. Since the 2/1 twill weave is relatively easy to maintain the shape, the number of driving can be reduced. In a 2/2 surge, the number of intersections of the weft and the warp is small, so that it is difficult to maintain the shape, and a large number of driving is required. For this reason, the range with high CF is also a preferable range.

The cover factor (sometimes abbreviated as CF) referred to in the present invention is obtained as follows.
CF = CF (warp) + CF (weft)
CF (warp) = Warp density of fabric (10 / 10cm) ÷ √ (wrist count)
CF (weft) = Weft density of fabric (10 / 10cm) ÷ √ (wool count)

The basis weight of the fabric of the present invention is not particularly limited, but is preferably 120 to 280 (g / m ² ), more preferably 140 to 250 (g / m ² ). Here, if it is less than 120 (g / m ² ), the tension of the entire fabric is reduced and the durability at the time of wearing is insufficient, which makes it difficult to apply to uniforms and school uniforms. On the other hand, if it exceeds 280 (g / m ² ), the fabric itself is stiff and is not suitable for the intended use of the fabric.

In the woven fabric of the present invention, the fabric weight per unit area (g / m ² ) is formed in the vicinity of twice the fabric cover factor (CF), so that the intended washing durability, in particular, texture change and fluffing after repeated washing can be achieved. Since a woven fabric having a small dimensional change rate is obtained, it is particularly desirable to form the fabric weight (g / m ² ) in the vicinity of twice the fabric cover factor (CF). The double vicinity mentioned here is 1.90 to 2.10.
In particular, it has been found that there is a preferable range depending on the woven structure. In plain weave, 2/1 twill weave, 1.95 to 2.05, and in 2/2 surge, it is 1.98 to 2.02.

  The woven fabric of the present invention is subjected to a hair burning treatment with a gas burner by passing the woven green machine through a gas hair burning machine at a temperature of about 400 to 1200 ° C. and a treatment speed of about 30 to 100 m / min. In this case, it is important that the hair is burned on one side, although there is a tradeoff with the cover factor and / or weight of the fabric. Here, by performing the single-sided hair-burning treatment, an unexpected effect completely different from the purpose and effect of normal hair-burning is stabilized, that is, the physical properties of the fabric after washing, in particular, the dimensional change rate of the fabric is stabilized. A special effect that suppresses the occurrence of texture change and fluffing is obtained. The reason for this is not clear, but it is presumed that the woven fabric is heat-set and the dimensional stability is improved by performing single-sided hair burning.

  Here, when double-sided hair baking is performed, the dimensional stability is improved, but the fabric texture tends to be hard.

Hereinafter, the present invention will be described in detail based on specific production examples. However, the present invention is not limited to these production examples, and is implemented with modifications within a range that can be adapted to the purpose described below. All of which are within the scope of the present invention.
In addition, evaluation of each performance in a manufacture example was performed by the method as described below.

(Twisting coefficient)
The twist coefficient is obtained by K = T / √N. Here, K is a twist coefficient, T is the number of twists per meter, and N is a single yarn count. In the case of twin yarn, use the single yarn count that composes it. (Example: 60th single yarn is expressed as 1/60, and N is calculated by 60 at this time.)

(Measurement method of twist number)
According to 9.15.1A method of JIS L1095 general spun yarn test method.

(Measurement method of pilling)
JIS L 1076 6. a) According to method A (ICI method).

(Measurement method of wear strength)
According to JIS L 1096 8.17.5 E method (Martindale method).

(Measurement method of mixing ratio of long / short composite spun yarn and blended yarn)
JIS L1030-2 Test method for mixed ratio of textile products-Part 2: Mixed ratio of fibers b) By dissolution method.

(Laundry test method)
The JIS L 0217 103 method was adopted as a washing test method.
Washing was performed by adding a fabric and, if necessary, a load cloth to the washing liquid in which the synthetic detergent was dissolved so that the bath ratio was 1:30. Washing was repeated 10 times. After washing, a fabric that was air-dried flatly was used as a sample for evaluating physical properties after washing.

(Evaluation method of dimensional change rate before and after washing)
According to JIS L 1909 dimensional change rate measurement method for textile products. The preparation of the fabric before washing was in accordance with 7.1 and the fabric was marked to represent a length of 35 cm. Measurement and calculation of dimensional change rate is 10. According to a. As for the measurement results, it was evaluated which of the following ranks the value with the larger absolute value of the change rate out of the dimensional change rate in each of the longitudinal direction and the weft direction falls.
Dimensional change rate Less than ± 2% ○
Dimensional change rate ± 2-4% △
Dimensional change rate exceeds ± 4% ×

(Texture evaluation method for fabric after washing)
The woven fabric woven under each condition was subjected to a laundering test, and the woven fabric after the laundering test was cut into 15 cm × 15 cm wide and used as samples for evaluation. This sample was evaluated by five monitors based on the following ranks for the tactile sensation to react as if the sample was pinched with both hands. The average value of the evaluation of five people was used as the evaluation score of the texture.
Very soft 5
Software 4
Normal 3
A little hard 2
Hard 1

(Evaluation method for fluff after washing)
The woven fabric woven under each condition was subjected to a laundering test, and the woven fabric after the laundering test was cut into 15 cm × 15 cm wide and used as samples for evaluation. This sample was evaluated by five monitors based on the following rank by visual judgment. The average value of the evaluation of five people was used as the evaluation score of the texture.
Very little fuzz 5
Less fuzz 4
Slightly fuzzy 3
Lots of fuzz 2
A lot of fuzz 1

(Production Example 1)
1 is fed with ESS kneaded wool (wool 75% by weight: ESS 25% by weight) roving 1 / 5.0 Nm from the back roller 1 as the roving B, and the back roller 1, the cradle 2 and the front roller 3 In the meantime, the draft was drafted at a total draft magnification of 18.0 times. On the other hand, a polyester filament yarn 56 dtex / 24 filament was used as the multifilament yarn A, which was supplied to the spread electrode 6 through the guide 9. In the opening electrode 6, -3000V is applied to the multifilament yarn A for opening, then the opening width is set to 150% of the maximum width of the fleece through the annular guide 7, and the drafted fleece-shaped roving B The fleece-like rovings that are supplied to the front roller 3 and drafted by the front roller 3 while the supply position of the opening filaments and the fleece-like rovings B are regulated so that the center of the opening filament overlaps the center. Superposed and mixed with B, twisted to a twist number of 460 T / m (Z-twisted), 50% polyester / wool (also called wool) 50% yarn count, 1/60 Nm twist coefficient 65 long and short composite spun yarn It was wound up on thread 10.

Two of these long and short composite spun yarns are aligned and twisted into a twin yarn (2/60 Nm) with a twisting factor of 70 in the opposite direction (S twist) of the single yarn, and then the number of warp driven yarns is 245 10 cm), and a weave weaving number of 225 (lines / 10 cm) was used to weave a plain weave fabric. The fabric was then passed through a dye arrangement process. In the arranging process, the woven fabric was passed through a gas hair roasting machine to perform a single-sided hair roasting treatment. The cover factor of the fabric was 85.8. The fabric weight was 176 g / m ² . The evaluation results of the fabric are shown in Table 1.

(Production Example 2)
80% by weight of wool in the same manner as in Production Example 1 except that a 1 / 5.0 Nm worsted roasted yarn manufactured with 100% wool as roving yarn B was combined with a polyester filament 33 dtex / 18 filament as multifilament A. A 20% by weight polyester long / short composite spun yarn was spun and subjected to twin yarn processing to obtain a plain woven fabric. The fabric was then passed through a dye arrangement process. In the arranging process, the woven fabric was passed through a gas hair roasting machine to perform a single-sided hair roasting treatment. The cover factor of the fabric was 85.8. The fabric weight was 176 g / m ² . The evaluation results of the fabric are shown in Table 1.

(Production Example 3)
Using the long and short composite spun yarn (2/60 Nm) processed in the same manner as in Production Example 1, the warp driving number is 320 (lines / 10 cm) and the weft driving number is 265 (lines / 10 cm). Weaved with twill. The fabric was then passed through a dye arrangement process. In the arranging process, the woven fabric was passed through a gas hair roasting machine to perform a single-sided hair roasting treatment. The cover factor of the fabric was 106.8. The fabric weight was 218 g / m ² . The evaluation results of the fabric are shown in Table 1.

(Production Example 4)
Using the long and short composite spun yarn (2/60 Nm) processed in the same manner as in Production Example 1, the warp driving number is 370 (lines / 10 cm) and the weft driving number is 290 (lines / 10 cm). Weaved with twill. The fabric was then passed through a dye arrangement process. In the arranging process, the woven fabric was passed through a gas hair roasting machine to perform a single-sided hair roasting treatment. The cover factor of the fabric was 120.5. The fabric weight was 244 g / m ² . The evaluation results of the fabric are shown in Table 1.

(Production Example 5)
Using the long and short composite spun yarn (2/60 Nm) processed in the same manner as in Production Example 1, the warp yarn driving number is 295 (lines / 10 cm) and the weft yarn driving number is 245 (lines / 10 cm). Weaved with twill. The fabric was then passed through a dye arrangement process. In the arranging process, the woven fabric was passed through a gas hair roasting machine to perform a single-sided hair roasting treatment. The cover factor of the woven fabric was 98.6. The fabric weight was 192 g / m ² . The evaluation results of the fabric are shown in Table 1.

(Production Example 6)
Using long and short composite spun yarn (2/60 Nm) processed in the same manner as in Production Example 1, weaving with warp driving number 220 (lines / 10 cm), weft driving number 205 (lines / 10 cm), plain weave structure did. The fabric was then passed through a dye arrangement process. In the arranging process, the woven fabric was passed through a gas hair roasting machine to perform a single-sided hair roasting treatment. The cover factor of the fabric was 77.6. The fabric weight was 151 g / m ² . The evaluation results of the fabric are shown in Table 1.

(Production Example 7)
2/2 surge with a warp driving number of 330 (lines / 10 cm) and a weft driving number of 295 (lines / 10 cm) using long and short composite spun yarns (2/60 Nm) processed in the same manner as in Production Example 1. Weaved with tissue. The fabric was then passed through a dye arrangement process. In the arranging process, the woven fabric was passed through a gas hair roasting machine to perform a single-sided hair roasting treatment. The cover factor of the fabric was 114.1. The fabric weight was 231 g / m ² . The evaluation results of the fabric are shown in Table 1.

(Production Example 8)
Using 50% by weight of regular ester staple with a fineness of 3.3 dtex and 64 to 102 mm bias cut, 50% by weight of 21μ wool, count 1/60 Nm, single yarn twist number 650 T / M (Z), twist factor 85 Spinning blended yarn. This blended yarn is twisted into twin yarns at a twisting factor of 90 in the direction opposite to the single yarn twist direction (S twist), and then warp number of threads 222 (lines / 10 cm), weft number of threads 207 (lines / 10 cm) Weaving with a plain weave structure. The fabric was then passed through a dye arrangement process. In the arranging process, the woven fabric was passed through a gas hair roaster and double-sided. The cover factor of the fabric was 78.0. The fabric weight was 151 g / m ² . The evaluation results of the fabric are shown in Table 1.

(Production Example 9)
In the same manner as in Production Example 8, except that the single yarn twisting factor was 65, the twin yarn twisting factor was 70, the warp driving number was 224 (lines / 10 cm), and the weft driving number was 204 (lines / 10 cm), A plain weave fabric was woven. The fabric was then passed through a dye arrangement process. In the arranging process, the woven fabric was passed through a gas hair roaster and double-sided. The cover factor of the fabric was 77.8. The fabric weight was 149 g / m ² . The evaluation results of the fabric are shown in Table 1.

(Production Example 10)
A woven fabric having a 2/1 twill structure was woven in the same manner as in Production Example 8 except that the number of warp driven 295 (lines / 10 cm) and the number of weft driven 244 (lines / 10 cm) were used. The fabric was then passed through a dye arrangement process. In the arranging process, the woven fabric was passed through a gas hair roaster and double-sided. The cover factor of the woven fabric was 98.0. The fabric weight was 192 g / m ² . The evaluation results of the fabric are shown in Table 1.

(Production Example 11)
In the same manner as in Production Example 8, except that the single yarn twist coefficient was 65, the twin yarn twist coefficient was 70, the number of warp threads 291 (lines / 10 cm), and the number of weft threads 243 (lines / 10 cm), A 2/1 twill weave fabric was woven. The fabric was then passed through a dye arrangement process. In the arranging process, the woven fabric was passed through a gas hair roaster and double-sided. The cover factor of the fabric was 97.1. The fabric weight was 188 g / m ² . The evaluation results of the fabric are shown in Table 1.

(Production Example 12)
A woven fabric having a 2/2 surge structure was woven in the same manner as in Production Example 8 except that the number of warp driven 332 (lines / 10 cm) and the number of weft driven 308 (lines / 10 cm) were used. The fabric was then passed through a dye arrangement process. In the arranging process, the woven fabric was passed through a gas hair roaster and double-sided. The cover factor of the fabric was 116.4. The fabric weight was 245 g / m ² . The evaluation results of the fabric are shown in Table 1.

(Production Example 13)
In the same manner as in Production Example 8, except that the single yarn twisting factor was 65, the twin yarn twisting factor was 70, the warp threading number was 324 (lines / 10 cm), and the weft threading number was 305 (lines / 10 cm), A fabric with a 2/2 surge structure was woven. The fabric was then passed through a dye arrangement process. In the arranging process, the woven fabric was passed through a gas hair roaster and double-sided. The cover factor of the fabric was 114.4. The fabric weight was 235 g / m ² . The evaluation results of the fabric are shown in Table 1.

(Production Example 14)
Spinning was performed in the same manner as in Production Example 1 except that 1 / 5.0 Nm worsted roasted yarn manufactured with 100% wool was used as the roving yarn B, and the twist coefficient of the single yarn was set to 60, and the count was 1/60 Nm, A long and short composite spun yarn of 67% wool and 33% polyester was obtained. Two of these long and short composite spun yarns are aligned and twisted into a double yarn (2/60 Nm) with a twisting factor of 70 in the opposite direction (S twist) to the single yarn twist direction, and then the number of warp driven 285 10 cm), and weaving number of wefts 285 (lines / 10 cm), weaving fabric of 2/2 surge structure. The fabric was then passed through a dyeing and arranging process. In the dyeing and arranging step, only double-sided hair cutting was performed without performing gas hair burning. The cover factor of the fabric was 104.1. The fabric weight was 212 g / m ² . The evaluation results of the fabric are shown in Table 1.

  The long and short composite spun yarn fabric of the present invention maintains good texture and softness as a fabric suitable for uniforms and school uniforms, etc., and has durability for washing, in particular, less texture change and fuzz after repeated washing, A high-performance fabric with a small dimensional change rate can be provided.

1. Back roller Cradle 3. Front roller 4. Snell wire Ring and traveler 6. Opening electrode 7. Annular guide 8. Phan 9. Guide 10. Pipe yarn

Claims (5)

Ri synthetic fiber multi-filament and staple fibers and are woven der using long and short composite yarn are uniformly mixed to at least a portion of ply yarns or Mitsuko yarn was twisted if aligns two or three evacuation by an electric opening mixed , long and short composite yarn fabric characterized by Rukoto one side of the fabric material has not been singeing. Twist coefficient of single yarns before twisting case of long and short composite yarn constituting the fabric, long and short composite yarn fabric according to claim 1 which is 40 to 100. The long / short composite spun yarn fabric according to claim 1 or 2 , wherein the fabric weight per unit area (g / m ² ) is 1.95 to 2.05 times the fabric cover factor (CF). A product comprising the long and short composite spun yarn fabric according to any one of claims 1 to 3 . Products according to claim 4 products are school uniform or uniform.