JP3745464B2 - Core yarn and manufacturing method thereof - Google Patents

Description

【００２８】
表１から、次のことが確認された。ＮＯ１のものは、ナイロン６の含有量が少ないためドライタッチ風合が少なく、ドレープ性が少なく防しわ性が低かった。ＮＯ６は、逆に張り、腰が強すぎてドレープ性が低く吸湿性も低かった。
これに対してＮＯ２〜５は、本発明の要件を全て満足するもので、張り、腰もあり、ダライタッチでありながらソフト風合を示し、防しわ性、寸法安定性、吸湿性にも優れていた。
【００２９】
【発明の効果】
本発明のコアヤーンは、吸湿性、張り、腰、ドライ、シャリ感に優れ、やわらかな風合いのある編織物を得ることのできるものであり、また、本発明の製造法によれば、叙上のコアヤーンが再現性良く安定して得られる。
【図面の簡単な説明】
【図１】図１は、本発明に係る再生繊維のまゆ形断面である。
【図２】図２は、本発明に係る再生繊維の三角断面である。
【図３】図３は、本発明に係る再生繊維の変形四角断面である。
【図４】図４は、本発明に係る再生繊維の四角断面である。
【図５】異形度を説明するための説明図である。
【図６】紡糸ノズルの断面図である。
【符号の説明】
１、２、３ 子孔[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a core yarn excellent in hygroscopicity using a regenerated fiber having a modified cross section and a method for producing the same.
[0002]
[Prior art]
At present, polyester rayon blended yarn and polyester wool blended yarn are used as outwear yarns for women's pants and jackets.
However, although the blended yarn has dimensional stability, it is poor in hygroscopicity because it is blended with polyester, lacks in tension and waist, lacks dryness, and lacks a soft texture. It was.
Furthermore, polyester blended yarns are usually dyed in the form of a fabric at a high pressure of 130 ° C., so that blended partners such as rayon and wool are often damaged, resulting in quality defects.
[0003]
[Problems to be solved by the invention]
The present invention provides a knitted fabric with a soft texture that is excellent in hygroscopicity, tension, waist, dryness, and crispness as a thread for outwear such as women's pants and jackets in which the polyester blended yarn is used. It is an object of the present invention to provide a core yarn that can be manufactured and a method for producing the same.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention takes the following means.
That is, according to the present invention, staples of regenerated fibers having an irregular cross-section with an average degree of polymerization of 400 or more are arranged in the sheath, and one or more polyamide filaments having a thickness of 15 to 110 denier are arranged in the core. The core yarn is characterized in that the content of the polyamide monofilament is 5 to 40% by weight.
[0005]
Further, the present invention provides one or two polyamide filaments having a thickness of 15 to 110 denier when spinning a fiber assembly composed of staples of regenerated fibers having an irregular cross-section with an average degree of polymerization of 400 or more from a spinning machine. This is a core yarn manufacturing method characterized in that the above is supplied immediately before the upstream of the front roller, and is spun and twisted in the middle of the fiber assembly being drafted.
[0006]
In the present invention, it is preferable that the regenerated fiber having an average polymerization degree of 400 or more is a polynosic fiber, the deformed section is a deformed section having a deformed degree of 0.1 to 0.95, and the deformed section is a triangular section. This is an embodiment.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is described in detail below. The core yarn of the present invention has regenerated fiber staples having an average cross-section of 400 or more in the sheath at the average cross section, in order to increase shrinkage due to washing and improve dimensional stability and fiber strength.
Examples of such regenerated fibers include polynosic fibers and cupra fibers, among which polynosic fibers are preferred for obtaining dimensional stability.
[0008]
The regenerated fiber must have a modified cross section. This irregular cross section provides tension to the fabric, gives a waist, eliminates a slimy feeling, and gives a dry touch texture effect.
[0009]
1 to 4 are shown as examples of the irregular cross section. FIG. 1 shows an eyebrow cross section, FIG. 2 shows a triangular cross section, FIG. 3 shows a modified square cross section, and FIG. 4 shows a square cross section.
[0010]
The irregularity of the irregular cross section indicates the degree of the irregular cross section. For example, as shown in FIG. 5, the circumscribed circle diameter is T ₂ , and the inscribed circle diameter is T _{1 and} is represented by T ₁ / T ₂ .
[0011]
If the degree of profile is less than 0.10, the tension and waist tend to be insufficient, and the texture tends to be slimy. On the other hand, if it exceeds 0.95, spinning becomes difficult, which is not preferable. It is preferable to be in the range of ~ 0.95.
More preferably, it is 0.20-0.95, Most preferably, it is 0.30-0.95, Most preferably, it is 0.20-0.75.
[0012]
The regenerated fiber preferably has a fineness of 0.7 to 3 denier, more preferably 1 to 3 denier, particularly preferably 1.2 to 2.5 denier, and a fiber length of 28 to 72 mm, more preferably 32 to 51 mm. . If it is less than 0.7 denier, it tends to be lacking in tension and waist. On the other hand, if it exceeds 3 deniers, the texture becomes coarse and hard.
On the other hand, if it is less than 28 mm, the yarn strength is undesirably lowered. On the other hand, if it exceeds 72 mm, the fluff length becomes too long. Of course, an equal length cut or an unequal length cut may be used.
[0013]
One or two or more polyamide monofilaments having a thickness of 15 to 110 deniers are arranged on the core of the core yarn. This is to stretch the fabric and improve the waist further. If the denier is less than 15 denier, the tension and waist increase cannot be obtained. On the other hand, if it exceeds 110 denier, it becomes rigid and the softness of the sheath cannot be fully utilized. Preferably it is 30-80 denier. The number of filaments may be one or two or more.
[0014]
Here, the reason why the filament is limited to polyamide is to sufficiently absorb moisture and to discharge the filament so as to have excellent hygroscopicity. When the number of filaments is two or more, it is only necessary to select a multifilament yarn having a matching denier.
Examples of the polyamide material include nylon 66, nylon 6, nylon 46, and the like.
[0015]
In addition, it is preferable that the polyamide filament of the core occupies 5 to 40% by weight, more preferably 5 to 30% by weight in the core yarn.
The twisting coefficient applied to the core yarn is preferably 2.5 to 5.5, more preferably 3.0 to 5.0 in the inch system. When it is less than 2.5, fuzz increases, and when it exceeds 5.5, the texture becomes hard, which is not preferable.
[0016]
Here, the manufacturing method of the core yarn of this invention is demonstrated.
For example, as shown in FIG. 6, spinning nozzles 1, 2, and 3 are provided close to each other, and regenerated fibers having a triangular cross section having an average degree of polymerization of 400 or more are spun from the spinning nozzles. By providing two, three, or four spinning nozzles close to each other, regenerated fibers having an eyebrow shape, a triangular cross section, and a square cross section are spun.
Subsequently, the bundle of the regenerated fiber filaments thus manufactured is supplied to a staff box, crimped, and cut into a predetermined length to produce staples.
Furthermore, when the staple is used as a raw cotton to produce a roving yarn through a blended cotton process, a card, a kneading line, and a roving machine, the roving yarn is put into a spinning machine, a predetermined draft is applied, and the yarn is spun from a front roller. In addition, one or two or more polyamide filaments of 15 to 110 denier are spun onto the drafted recycled fiber rovings by applying a predetermined tension immediately before upstream of the front roller, and subjected to actual twisting to core yarn. Manufacturing.
[0017]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples. In addition, the measuring method used for the Example is shown below.
(A) Average degree of polymerization According to the 7.29 average degree of polymerization of JIS L1015-1992, this is carried out using an Oken viscometer while cutting off the atmosphere with a nitrogen stream.
[0018]
(B) Create a metal section of a thread-shaped sample with good irregularity.
Next, drawing is performed at a magnification of 600 times with a microscope equipped with a drawing apparatus. Note that N = 100 for drawing. With respect to the drawing at 100 locations, each inscribed circle diameter T ₁ , circumscribed circle diameter T ₂ , and T ₁ / T ₂ is obtained using a template, and the average value is defined as the degree of irregularity.
[0019]
(C) Feel (dry touch)
Judgment was made based on the degree of dry touch by sensory inspection of 10 people. ◎ indicates 9 or more, ○ indicates 6-8, △ indicates 4-5, and X indicates that 3 or less have a dry touch texture.
[0020]
(D) Feel (soft)
Judgment was made based on the degree of dry touch by sensory inspection of 10 people. ◎ indicates 9 or more, ○ indicates 6-8, △ indicates 4-5, and X indicates that 3 or less have soft texture.
[0021]
(E) Tension, waist Flexibility was measured by A method (45 ° cantilever method) of JIS L1096. In addition, a test piece of 2 cm × 15 cm was measured, and five horizontal samples were collected. Each of the five test samples was slid with the surface facing up, and the average value was expressed. The test piece was slid by hand.
[0022]
(F) Drape coefficient The drape coefficient was measured by the G method of JIS L1096. Specifically, five circular test pieces having a diameter of 25.4 cm were collected, a hole having a diameter was formed in the center of each test piece, and then the test surface of the drape tester (diameter 12.2. 7 cm), the sample stage was vibrated up and down 3 times and left for 1 minute to measure the drape area at that time, and the drape coefficient = (A _d −S ₁ ) / (S ₂ −S _It was obtained from the formula of ₁ ). Incidentally, A _d is the vertical projection area of the specimen (drape shape area) (mm ^2), S ₁ is the area of the sample stage (mm _^2), S ² represents the area of the sample (mm ^2).
[0023]
(G) Wrinkle resistance JIS L1059 Method B (Monsanto method)
Ten test pieces each having a size of 15 mm × 40 mm in the vertical direction and the horizontal direction are collected, sandwiched between the metal plate holders of the Monsanto type tester, and the portion protruding from the short plate on the upper side is folded back in each direction. The 5 sheets are front and back, and the remaining 5 sheets are sandwiched with a press holder so that the back and the back are in contact, and after adding for 5 minutes under a load of 500 g, the weight is removed. The holder is inserted into the tester holder, and the rotating part of the test piece is turned continuously so that the suspended part of the test piece is aligned with the center line of the tester, and the open angle x of the test piece is measured after 5 minutes. The average value of the front and back 5 sheets and the ratio (%) with respect to 180, and the width, the average of the front and back 5 sheets and the ratio to 180 (%).
[0024]
(H) Dimensional stability (washing shrinkage rate (%))
JIS L1042 F-1 method is sufficient to cover two test pieces of 50 cm × 50 cm with a mark of 45 cm (L ₁ ) × width 45 cm (L ₂ ) on the washing machine. Put water at ℃, put two test pieces and other fabric together to make 1.36kg, and put it in it, and at the same time about JIS K3303 (powdered soap) (1 type). Add to 1% solution and run for 15 minutes. Subsequently, the water is replaced with fresh water at about 40 ° C. for 5 minutes, and then replaced with fresh water at about 40 ° C. for 10 minutes. After draining, take out the test piece and hang it to dry.
Next, the mark L ₁ ′ corresponding to the fresh test piece after drying and the mark L ₂ ′ corresponding to the width are measured, and the formula {(L ₁ −L ₁ ′) / L ₁ } × 100 Thus, for the weft, the obtained values were obtained by the average value of two sheets according to the equation {(L ₂ −L ₂ ′) / L ₂ } × 100.
[0025]
(I) Hygroscopicity Judgment was made based on a feeling of wear by sensory inspection of 10 people. ◎: 9 or more, ○: 6-8, Δ: 4-5, x: 3 or less judged to be hygroscopic.
[0026]
Example 1
Polynosic fibers having a different degree of fineness with an average degree of polymerization of 500 in the triangular cross section shown in FIG. 2 were produced using the spinneret (core holes 1, 2 and 3) shown in FIG.
The manufacturing conditions at this time are as follows.
Child open area sum (mm ^2), respectively ^{0.0020mm 2, 0.0035mm 2, 0.0058mm 2} , 0.0087mm 2, in 0.0094Mm ^2, discharge rate (g / min · hole), respectively 294g / Min · hole, 504 g / min · hole, 840 g / min · hole, 1260 g / min · hole, 1345 g / min · hole, and the shear rate (sec ⁻¹ ) is 4.0 × 10 4 sec ⁻¹ , 3 ^{.1 × 104 sec -1, 2.4 ×} 104 sec -1, 1.9 × 104 sec -1, was 1.8 × 104 sec ^-1.
The spinning speed (m / min) is 23 m / min, the hole length (mm) of the core group is 1.8 mm, the discharge linear speed (m / min) is 15.3 m / min, and the nozzle draft is 1.0 times. , L ₁₂ , L ₂₃ , and L ₃₁ were set to 0.01 mm, and the number of sub-hole groups was set to 27,000.
Next, this polynosic fiber is cut into 38 mm, and the blended cotton process, kneading and roving process are made into roving yarn, and the yarn is put into a spinning machine and supplied with filaments of nylon 6 of various thicknesses, and the core yarn 20 ' ^S / 1 (twisting factor 3.7) was spun.
Using this core yarn, a plain weave of 60 pieces / inch × 50 pieces / inch was woven. This plain weave was emery raised using a paper raising machine, then desizing, scouring, and enzyme treatment using a liquid dyeing machine, and using a reactive dye (Kayacion NavyECM) manufactured by Nippon Chemical Co., Ltd. ), 85% under conditions of 4.5% owf, anhydrous sodium sulfate 67 g / liter, soda ash 20 g / liter, report 350.2 g / liter of non-ionic active material manufactured by Nikka Chemical Co., Ltd. Was processed for 85 minutes, dyed, and finished. The results are shown in Table 1.
[0027]
[Table 1]

[0028]
From Table 1, the following was confirmed. Since the content of Nylon 6 is small, the dry touch texture is small, the drapeability is low, and the wrinkle resistance is low. On the contrary, NO6 was stretched and the waist was too strong so that the drapeability was low and the hygroscopicity was also low.
On the other hand, NO2 to 5 satisfy all the requirements of the present invention, and there are tension, waist, and soft touch while being Dalai touch, and excellent in wrinkle resistance, dimensional stability and moisture absorption. It was.
[0029]
【The invention's effect】
The core yarn of the present invention is excellent in hygroscopicity, tension, waist, dryness and sharpness, and can obtain a knitted fabric with a soft texture. According to the production method of the present invention, Core yarn can be obtained stably with good reproducibility.
[Brief description of the drawings]
FIG. 1 is an eyebrow-shaped cross section of a regenerated fiber according to the present invention.
FIG. 2 is a triangular cross section of a regenerated fiber according to the present invention.
FIG. 3 is a deformed square cross section of a regenerated fiber according to the present invention.
FIG. 4 is a square cross section of a regenerated fiber according to the present invention.
FIG. 5 is an explanatory diagram for explaining an irregularity degree.
FIG. 6 is a cross-sectional view of a spinning nozzle.
[Explanation of symbols]
1, 2, 3

Claims (5)

Recycled fiber staple having an average cross-section of 400 or more having a modified cross section is disposed in the sheath, and one or more polyamide monofilaments having a thickness of 15 to 110 denier are disposed in the core, and the content of the polyamide monofilament Is a core yarn characterized by being 5 to 40% by weight. The core yarn according to claim 1, wherein the regenerated fiber having an average degree of polymerization of 400 or more is a polynosic fiber. The core yarn according to claim 1 or 2, wherein the irregular cross section is an irregular cross section having an irregularity degree of 0.1 to 0.95. The core yarn according to claim 1 or 2, wherein the deformed cross section is a triangular cross section. When spinning a fiber assembly composed of staples of recycled fibers having an average cross-section degree of 400 or more from a fine spinning machine, one or more polyamide monofilaments having a thickness of 15 to 110 denier are upstream of the front roller. A process for producing a core yarn, characterized in that it is spun and twisted in the middle of a fiber assembly being supplied and drafted immediately before.

Images