WO2013005808A1 - Drawing frame device, core-sheath compound spun yarn manufacturing method, core-sheath compound spun yarn, and woven object - Google Patents

Abstract

When manufacturing a core-sheath compound spun yarn, a drawing frame device gathers and draws core-side slivers which are positioned on the core side and sheath-side slivers which are positioned on the sheath side. The drawing frame device comprises a condenser, further comprising: a gathering guide which is disposed upstream of a draft zone, and gathers the core-size slivers and the sheath-side slivers; and a wire-type guide which has a helical shape, is disposed downstream of the gathering guide, and heats the core-side slivers and the sheath-side slivers which the gathering guide has gathered.

Description

Kneading device, production method of core-sheath type composite spun yarn, core-sheath type composite spun yarn and knitted fabric

The present invention relates to a drawing apparatus, a method for producing a core-sheath type composite spun yarn, a core-sheath type composite spun yarn, and a woven or knitted fabric that are used when manufacturing a core-sheath type composite spun yarn.

Traditionally, synthetic fibers made from polyester, acrylic, and nylon are used for spun knitted fabrics in addition to natural fibers such as cotton and wool. In recent years, there is a need for materials with new textures and functions. Is growing.

There are many applications that require special functions such as high strength, cut resistance, abrasion resistance, chemical resistance, and heat resistance, such as sports and special uniform applications. Many of them degrade their performance in special environments such as under high-temperature dyeing.

In particular, polylactic acid fibers derived from natural materials, cellulosic fibers such as bamboo rayon made from bamboo, polyphenylene sulfide (hereinafter referred to as PPS) fibers, and Kevlar fibers have low weather resistance, and are hydrolyzed. Embrittlement and discoloration occur, which not only lowers the functional aspect but also greatly reduces the appearance and quality.

In order to solve this problem, a core-sheath type composite spun yarn with a filament yarn has been proposed (see, for example, Patent Documents 1 and 2). However, depending on the type of filament, the coverage is extremely low, and the sheath-side fiber bundle is misaligned so that it becomes a so-called nude yarn. Sometimes. For this reason, the use development of the core-sheath type composite spun yarn with the filament yarn has been limited.

On the other hand, composite yarns that can be obtained by mixing two or more types of materials using a normal ring spinning process, a double roving method using a spinning machine, and a sliver array arranged in parallel on a drawing machine are also proposed. (For example, refer to Patent Document 3). However, in this case, since many core side fibers are exposed on the surface, application development is limited as in the case of the core-sheath type composite spun yarn with the filament yarn.

In this way, with the conventional technology, even though fibers with special functions are used, as a result, satisfactory results cannot be obtained, and slab / nep There were many problems such as quality problems such as frequent occurrences.

JP 2003-20529 A JP 2007-308823 A JP 58-144141 A

The present invention has been made in view of the above, and in the core-sheath structure, the variation in the coverage of the sheath portion is reduced, and the occurrence of unevenness on the surface of the fabric when the fabric is woven or knitted is prevented. It is an object of the present invention to provide a kneading device, a method for producing a core-sheath type composite spun yarn, a core-sheath type composite spun yarn, and a woven or knitted fabric that are used when manufacturing a core-sheath type composite spun yarn.

In order to solve the above-described problems and achieve the object, the drawing apparatus according to the present invention is a core-side sliver to be arranged on the core side and a sheath side to be arranged on the sheath side when producing a core-sheath type composite spun yarn. A drawing apparatus for converging and slicing a sliver, wherein the converging guide is provided in a front stage of a draft zone of the kneading apparatus and converges the core side sliver and the sheath side sliver, and a subsequent stage of the converging guide And a wire-type guide for twisting the core-side sliver and the sheath-side sliver in which the focusing guide is focused in a spiral shape.

The drawing apparatus according to the present invention is the above-described invention, wherein the capacitor is provided at a subsequent stage of the wire-type guide, and the core-side sliver and the sheath-side sliver in which the wire-type guide is twisted in a ring shape. It further has a ring-shaped guide for untwisting.

The drawing apparatus according to the present invention is characterized in that, in the above invention, the drawing apparatus further includes a guide member that is provided in a front stage of the capacitor and that disposes the sheath-side sliver around the core-side sliver and feeds it to the capacitor. To do.

The strip device according to the present invention is the above-described invention, wherein the guide member includes a rod-shaped member in which a hole for a core-side sliver through which the core-side sliver is inserted is formed along an axial direction, and a tip portion of the rod-shaped member. And a block member formed with an opening through which the sheath-side sliver is inserted in a gap formed between the rod-shaped member in a state where the rod-shaped member is inserted and fixed. To do.

The strip device according to the present invention is characterized in that, in the above-described invention, the opening has a flat cross section.

The strip device according to the present invention is the above-described invention, wherein the guide member is disposed around a core-side sliver hole through which the core-side sliver is inserted, and around the core-side sliver hole. It forms in the shape of a plate in which a plurality of sheath side sliver holes penetrating each part are formed.

The method for producing a core-sheath type composite spun yarn according to the present invention is a method for producing a core-sheath type composite spun yarn, wherein the core-side sliver arranged on the core side and the sheath-side sliver arranged on the sheath side have a spiral shape. It has the drawing process which drafts after twisting by letting the capacitor | condenser which has a wire-type focusing guide pass.

In the method of manufacturing a core-sheath type composite spun yarn according to the present invention, in the above invention, the drawing step includes a step of ringing the core-side sliver and the sheath-side sliver twisted by the wire-type focusing guide before drafting. It is characterized by untwisting with a ring-shaped guide having a shape.

The method for producing a core-sheath type composite spun yarn according to the present invention is characterized in that, in the above-described invention, a weight ratio of the core-side sliver to the sheath-side sliver is set to 5:95 to 45:55.

The core-sheath type composite spun yarn according to the present invention is manufactured by the above-described method for manufacturing a core-sheath type composite spun yarn.

The woven or knitted fabric according to the present invention is characterized by containing 20% by weight or more of a core-sheath type composite spun yarn.

According to the present invention, in the core-sheath structure, it is possible to reduce the variation in the coverage of the sheath portion, and to prevent the occurrence of the unevenness of the fabric surface when the fabric is made of woven fabric or knitted fabric.

FIG. 1 is a diagram showing a configuration of a main part of a drawing apparatus according to Embodiment 1 of the present invention. FIG. 2 is a plan view showing a configuration of a plate-shaped guide provided in the drawing apparatus according to Embodiment 1 of the present invention. FIG. 3 is a diagram showing a configuration of a main part of the drawing apparatus according to the second embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described with reference to the accompanying drawings. Note that the drawings referred to in the following description are merely schematic.

(Embodiment 1)
In the present invention, the functionality that the fibers can have is impaired by being exposed to the surface of the spun yarn, or the fibers that cause discomfort by touching the human body are arranged inside the spun yarn to prevent functional degradation. It becomes possible to obtain a suitable comfort.

The single fiber fineness of the short fiber used in the present invention is preferably in the range of 0.5 to 8.0 dtex, more preferably 0.6 to 3.0 dtex. By setting the single fiber fineness to 0.5 dtex or more, a spun yarn can be obtained with good spinnability in the spinning process. If it is 8.0 dtex or less, the bending stiffness of the final fiber product will not be too high, and it can be applied to clothing fabrics and the like that require softness. If the fineness of the single fiber is less than 0.5 dtex, the spun yarn quality may be impaired, for example, a nep occurs in the spinning card process. If it exceeds 8.0 dtex, the total number of fibers constituting the spun yarn will be insufficient, which tends to cause unevenness and defects in the spun yarn, and the texture of the product will become stiff, and the fluff tip will pierce the skin. Problems such as tingling may occur. For these reasons, the single fiber fineness is preferably 0.5 dtex or more and 8.0 dtex or less.

The elongation of the short fiber used in the present invention is preferably 5 to 30%. It is preferable that the elongation of the short fiber is 5% or more because yarn breakage in the spinning process is reduced. It is preferable that the short fiber has an elongation of 30% or less because variations in physical properties when mixed with other short fibers having low elongation such as cotton are reduced. Further, the elongation of the short fiber is more preferably 7% or more and 28% or less, and most preferably 10% or more and 25% or less.

The fiber length of the short fiber used in the present invention is preferably 25 to 200 mm. Here, the fiber length means an average value of the fiber lengths of the short fibers, but if the fiber length is less than 25 mm, the operability in the processing process may deteriorate, such as yarn breakage occurring in the spinning process. is there. Moreover, since the span feeling as a short fiber expresses by making fiber length into 200 mm or less, it is preferable. The fiber length is more preferably 30 mm or more, and most preferably 35 mm or more and 64 mm or less.

The fiber cross-sectional shape of the short fiber of the present invention is not particularly limited, and may be a perfect circular circular cross-section, or a multilobal shape, flat shape, elliptical shape, W shape, S shape, X shape, Different cross-section yarns such as H-shape, C-shape, rice-shape, and cross-girder may be used. Furthermore, these hollow fibers may be used. Glossiness, water absorption, etc. can be imparted by making it an irregular cross section.

The short fiber used in the present invention may be crimped. At this time, the number of crimps is preferably 3/25 mm to 20/25 mm. When the number of crimps is too low, a good texture with a light feeling cannot be achieved, and when the number of crimps is too high, the bulkiness may be lowered. The number of crimps is more preferably 5 peaks / 25 mm or more, and most preferably 8 peaks / 25 mm or more. Moreover, it is preferable that it is 15 mountains / 25 mm or less.

Further, the strength of the short fiber constituting the spun yarn of the present invention is preferably 2.0 cN / dtex to 7.0 cN / dtex. If it is less than 2.0 cN / dtex, the process passability in the spinning, weaving, and dyeing processes may be unsatisfactory. On the contrary, if the strength of the short fiber exceeds 7.0 cN / dtex, when the garment is worn, the fabric surface is rubbed and the short fibers are entangled with each other to grow into pills. Therefore, it is difficult for the pills to fall off and it is difficult to obtain anti-pilling properties.

Next, the configuration of the drawing apparatus according to Embodiment 1 of the present invention will be described. FIG. 1 is a diagram showing a configuration of a main part of the drawing apparatus according to the first embodiment. The drawing apparatus 1 shown in the figure includes a capacitor 2 provided in the front stage of the draft zone, a core-side sliver provided on the core side, and a sheath-side sliver provided on the sheath side provided in a predetermined stage. And a plate-like guide 3 that is a guide member that passes through the positional relationship and feeds it to the capacitor 2.

The capacitor 2 includes a sliver focusing guide 4 that focuses the core-sheath sliver passing through the plate-shaped guide 3 and a wire type that twists the core-sheath sliver that has a spiral shape and is focused by the sliver focusing guide 4. It has the guide 5 and the ring-shaped guide 6 which untwists the core-sheath sliver which twisted the wire type guide 5 in the ring shape. It is also possible to configure a capacitor without providing the ring-shaped guide 6.

FIG. 2 is a diagram showing the configuration of the plate-shaped guide 3, and is a plan view in the direction of arrow A in FIG. As shown in FIG. 2, the plate-shaped guide 3 penetrates in the thickness direction of the central portion of the plate-shaped base material, and the core-side sliver hole 7 through which the core-side sliver passes, and the periphery of the core-side sliver hole 7 A plurality of sheath-side sliver holes 8 through which the sheath-side sliver is passed are formed.

In addition, the shape of the plate-shaped guide 3 should just be a substantially plate shape. In FIG. 2, the diameter of the core-side sliver hole 7 is larger than the diameter of the sheath-side sliver hole 8, but this is only an example.

The sliver focusing guide 4 includes a notch 41 for introducing the sliver into the sliver focusing guide 4.

The core-side sliver and the sheath-side sliver are introduced into the sliver focusing guide 4 through the notch 41 formed in the sliver focusing guide 4 and focused. In the traveling state before being introduced into the sliver focusing guide 4, the angle formed by the core side sliver and the sheath side sliver is 15 to 40 °. By doing so, the core-side sliver can be three-dimensionally covered with the sheath-side sliver, and a core-sheath structure can be obtained by adding a draft as it is to obtain a spun yarn. Further, it is preferably 20 to 30 °. When the angle between the core side sliver and the sheath side sliver in the running state is smaller than 15 °, the core side sliver cannot be covered with the sheath side sliver. On the contrary, if the angle between the core side sliver and the sheath side sliver in the running state exceeds 40 °, the sliver sliver guide enters an acute angle, so that the sliver sliver guide 4 is abraded, causing fluff and unevenness. .

In the plate-shaped guide 3, it is preferable that the sheath side sliver holes 8 are arranged concentrically with the core side sliver hole 7 as the center. Is preferably provided.

The wire-type guide 5 has a spiral shape with an equal pitch and a substantially uniform diameter except for a connection portion with the sliver focusing guide 4. The shape of the wire-type guide 5 is not limited to this. For example, the wire-type guide 5 may have a spiral shape whose diameter gradually decreases from the sliver focusing guide 4 side toward the ring-shaped guide 6 side. However, it may have a spiral shape with unequal pitches.

The hollow portion 61 of the ring-shaped guide 6 preferably has a cylindrical shape that can sufficiently obtain the untwisting effect. The internal diameter of the cylinder is preferably changed according to the total fineness of the core-sheath sliver, and specifically, it is preferably arbitrarily defined in the range of 10 to 30 mm in diameter. More preferably, the diameter is 15 to 25 mm. If the inner diameter is narrow, resistance between the core-sheath sliver and the ring-shaped guide 6 is increased, which may promote fiber lump causing fiber fluffing and slab / nep. The length of the ring-shaped guide 6 is preferably 20 to 40 mm. If it is too long, resistance will be applied between the sliver and the ring-shaped guide 6 for a long period of time.

If the inner diameter of the ring-shaped guide 6 is too large or the length is too short, sufficient untwisting action does not work, and the twist remains in the core-sheath sliver and is supplied to the draft zone of the drawing machine. Therefore, it may cause irregular drafts and yarn unevenness.

The core-sheath ratio (weight ratio) of the sliver of the present invention is preferably in the range of core-side sliver: sheath-side sliver = 5: 95 to 45:55 in order to improve the coverage of the core fiber bundle. The core-sheath ratio is preferably in the range of 20:80 to 40:60 (weight ratio) in order to exhibit the texture and the characteristics of each fiber.

Short fibers that make up the core and sheath include natural fibers such as cotton, wool, hemp and silk, synthetic fibers such as polyester, nylon, acrylic and polypropylene, semi-synthetic fibers such as rayon and acetate, glass fibers, Aramid fiber, PPS fiber, fluorine fiber, metal fiber, polylactic acid fiber and the like can be arbitrarily selected according to the purpose.

The core-sheath type composite spun yarn in the present invention can exhibit an effect particularly when the core side fiber bundle and the sheath side fiber bundle are made of different materials. By completely separating them, the function can be exhibited without deteriorating the properties of the respective raw materials.

For example, by arranging in the core a fiber bundle that is not desired to be exposed on the surface, the characteristics of each fiber such as improvement of frosting and dyeability can be exhibited sufficiently.

Moreover, by disposing PPS fibers and Kevlar fibers that are inferior in light resistance on the core side, it is possible to prevent the function of the fibers from being deteriorated. Furthermore, since these PPS fibers and Kevlar fibers are difficult to dye, sufficiently covering with sheath-side fibers makes it easy to dye when made into a fabric, and the undyed portion is less noticeable.

In the first embodiment, the covering ratio by the sheath-side sliver can be arbitrarily reduced by passing the sliver through the plate-shaped guide 3 or the sliver focusing guide 4, and a natural feeling of wrinkle and melange can be obtained. It can also be expressed.

For example, a warm inner that uses the hygroscopic heat-generating action of rayon feels warmth due to sweat released from the body when worn for a long period of time. Often there is resistance. According to the present invention, if a material that does not feel dull even if it comes into contact with the skin on the sheath side, it can be comfortably worn even in mid-winter without impairing the hygroscopic heat generation function of rayon.

In addition, by placing cellulose rayon with hygroscopic action on the core side and nylon staple on the sheath side, a spun yarn with higher hygroscopicity can be obtained due to the synergistic effect of the hygroscopicity unique to nylon and the hygroscopic performance of cellulose. .

In addition, it has good process passability in higher fiber processes, and can provide a core-sheath type composite spun yarn with higher covering than conventional ones. Materials for clothing, agricultural materials, forestry materials, fishery materials, It can be suitably used as civil engineering materials, sanitary materials, daily necessities and the like.

Next, the manufacturing method of the core-sheath type composite spun yarn according to the first embodiment will be described.
In the first embodiment, it is important to install the capacitor 2 in front of the draft zone (front stage) of the drawing machine, and to install the plate-shaped guide 3 in front of it. A core-sheath sliver having a three-dimensional core-sheath shape can be created from the sliver state, and the above-described core-sheath type composite spun yarn can be obtained simply by going through a normal ring spinning process.

That is, in the first embodiment, a core-sheath type composite spun yarn having a high covering property can be obtained by a general ring spinning process only by installing the capacitor 2 and the plate-like guide 3.

In the first embodiment, the wire-type guide 5 provided in front of the draft zone of the drawing apparatus 1 applies appropriate tension to the core-side sliver that needs to be arranged on the core side, and interferes with the wire-type guide 5. So that the sliver group (sheath side sliver) forming a sheath side fiber bundle has an angle with respect to the core side sliver and reaches the capacitor 2 around the sliver focusing guide 4 When the side sliver and the wire-type guide 5 interfere with each other, resistance is generated at the interference point, and the periphery is covered so as to draw a spiral shape with respect to the core side sliver fiber group.

Supplied to the draft zone while maintaining the shape as it is, a sliver with the core-sheath shape remaining can be obtained. In addition, it is preferable that the draft magnification of the drawing apparatus 1 is as low as possible. This is because if the draft magnification is too high, the core-sheath structure of the folded fiber group may be destroyed by the draft action.

In the first embodiment, in order for the core-sheath structure to be formed on the wire type guide 5, the angle of the sliver with respect to the sliver focusing guide 4 becomes important. The position of the core side sliver hole 7 is set so that the core side sliver is on the extension line of the center line of the wire type guide 5, and the sheath side sliver hole 8 is placed on the concentric circle of the core side sliver hole 7. Make 8 pieces. At this time, as described above, it is necessary to provide a hole at an angle at which the sheath-side sliver moderately interferes with the wire of the wire-type guide 5 and can generate self-twist.

In addition, as for the material of the sliver focusing guide 4 and the wire type guide 5 used in the first embodiment, any material can be applied, but if a mirror-finished product or a satin-finished product is arbitrarily selected depending on the fiber material to be used. good. If a mirror-finished product is used, the contact area increases and the resistance value also increases, which is effective for silicone processed products and fluorinated fibers. On the other hand, when using a material having high resistance, it is preferable to select a sliver focusing guide that has been subjected to a satin finish.

The core-sheath type composite spun yarn produced by the production method described above is suitably used as a fabric such as a woven fabric or a knitted fabric. A more preferable effect can be obtained if the core-sheath type composite spun yarn is contained in a fabric such as a woven fabric or a knitted fabric in an amount of 20% by weight or more.

(Embodiment 2)
FIG. 3 is a diagram showing a configuration of a main part of the drawing apparatus according to the second embodiment of the present invention. The drawing apparatus 11 shown in the figure is provided in the preceding stage of the draft zone, the capacitor 2 provided in the preceding stage of the draft zone, and the guide which passes through the core side sliver and the sheath side sliver in a predetermined positional relationship and sends them to the capacitor 2. And an inrent guide 12 as a member. In FIG. 3, a sectional view of the inrent guide 12 is shown.

The inrent guide 12 can be inserted through the rod-like member 13 in which the hollow portion 131 which is a hole for the core-side sliver through which the core-side sliver passes and the tip of the rod-like member 13 are inserted, and the rod-like member 13 is inserted. In the state, it has the block member 14 in which the opening part 141 which has the space | gap which lets a sheath side sliver pass is formed around the rod-shaped member 13. FIG. In this sense, the opening 141 has a function as a sheath-side sliver hole.

The core side sliver and the sheath side sliver are focused by the inrent guide 12. Specifically, the core-side sliver in the traveling state passes through the hollow portion 131 of the rod-shaped member 13, and the sheath-side sliver passes through the gap with the rod-shaped member 13 in the opening 141 of the block member 14. The opening 141 has a tapered shape whose diameter decreases toward the rear stage, and the inclination angle is preferably 15 to 40 °, and more preferably 20 to 30 °. The distal end portion of the rod-shaped member 13 is also tapered, and the inclination angle of the distal end portion is substantially equal to the inclination angle of the opening 141. By doing so, the core-side sliver can be three-dimensionally covered with the sheath-side sliver, and a core-sheath type composite spun yarn can be obtained by spinning with a draft as it is. In addition, when the inclination angle of the opening 141 is smaller than 15 °, the core side sliver cannot be covered with the sheath side sliver. On the other hand, when the inclination angle of the opening 141 exceeds 40 °, the effect of rubbing on the sheath side sliver increases, which causes fluffing and unevenness.

Also in the second embodiment, the coverage by the sheath-side sliver can be arbitrarily reduced by passing the sliver through the inrent guide 12 or the sliver focusing guide 4, so that a natural wrinkle feeling and melange feeling can be achieved. It is possible to express.

Next, the manufacturing method of the core-sheath type composite spun yarn according to the second embodiment will be described.
In the second embodiment, it is important to install a sliver focusing guide and a wire-type guide in front of the draft zone of the drawing machine, and to install an inrent guide in front of it. The above-described core-sheath type composite spun yarn can be obtained simply by creating a three-dimensional core-sheath sliver from the sliver state and directly undergoing a normal ring spinning process.

That is, in the second embodiment, a core-sheath type composite spun yarn having a high covering property can be obtained by a general ring spinning process simply by installing the capacitor 2 and the inrent guide 12.

Also in the second embodiment, as in the first embodiment, it is desirable to reduce the draft magnification as low as possible in order to suppress the collapse of the core-sheath structure during the draft.

In the second embodiment, the rod-shaped member 13 has a radial direction with respect to the axis of the hollow portion 131 on the side surface of the front stage portion (hollow cylindrical portion in FIG. 3) that is not inserted into the opening 141 of the block member 14. A plurality of extending bars may be provided. By providing such a plurality of bars, the sheath-side sliver that has passed through the inrent guide 12 can be evenly arranged around the core-side sliver that has passed through the inrent guide 12.

In the second embodiment, the core-sheath sliver can be formed in a flat shape by changing the amount of the gap with the rod-shaped member 13 in the opening 141 according to the thickness of the sheath-side sliver.

Hereinafter, examples of the present invention will be described. In Examples of the present invention, a core / sheath composite spun yarn was manufactured using the drawing apparatus according to Embodiment 1, and the core sheath / coverage and hue evaluation were measured and evaluated by the following methods. .

[Coverage (Coverage)]
The coverage can be measured with high accuracy by the following method.
A woven or knitted fabric is produced by using the produced spun yarn, and a surface photograph of the obtained fabric is taken on a flat table or desk. Next, the core part and the sheath part of the photograph are cut with scissors, a cutter, etc., the weight of the photographic paper obtained in this way is measured with a scale, and the core-sheath ratio is calculated by the following formula.
Coverage (side surface) = {B / (A + B)} × 100 (%)
Here, A is the photographic paper weight of the cut core portion, and B is the photographic paper weight of the cut sheath portion. The coverage calculated in this way was evaluated as follows.
◎: 85% or more ○: 80% or more and less than 85% △: 70% or more and less than 80% ×: less than 70%

[Hue evaluation]
The core side sliver was dark blue, the sheath side sliver was white, and hue evaluation was performed using KONICA MINOLTA SPECTROPOTOMETER CM-3700d, and the ΔL value was obtained. The ΔL value was evaluated as 20 points when the difference from the ΔL value in Example 1 described later is less than 1.0 point, and as 0 points when the difference is 1.0 point or more.

[Appearance evaluation]
The appearance of the woven / knitted fabric (exposed degree of core fiber group) was evaluated by sensory evaluation as follows.
◎: Appearance best ○: Appearance good △: Appearance slightly good ×: Appearance defect

[Texture]
It evaluated as follows by sensory evaluation.
◎: Soft ○: Slightly soft △: Slightly hard ×: Hard

[Process passability]
Evaluation was performed as follows.
◎: Thread breakage within 10 pieces / 1000sp, no winding around the roller of the drawing apparatus ○: Thread breakage 11-15 pieces / 1000sp, within 1 turn winding around the roller of the drawing apparatus △: Thread breakage between 16-20 Book / 1000sp, within 3 times of winding around the roller of the drawing apparatus ×: Other than the above

[Comprehensive evaluation]
For coverage, texture, and process passability, ◎ = 20 points, ○ = 10 points, Δ = 5 points, and x = 0 points, and the overall evaluation is made by adding the value of hue evaluation to the sum of these points. went.
◎ (= Total score 80 points or more): Coverability, process passability, appearance best ○ (= Total score 50 points or more and less than 80 points): Coverability, process passability, appearance good △ (= Total score 20 points or more 50 Less than point): Coverability, process passability, appearance Somewhat good × (= less than 20 points in total): Coverability, process passability, poor appearance

Hereinafter, Examples 1 to 3 and Comparative Examples 1 to 2 will be described.

Example 1
In Example 1 of the present invention, a polyester spun yarn is taken up by a rotating roller, spun at a spinning speed of 1300 m / min, and then subjected to normal stretching at 3.0 times, crimping and cutting, and single fiber A polyester raw cotton having a fineness of 1.5 dtex, a fiber length of 38 mm, and a strength of 1.5 cN / dtex was obtained. After that, it was dyed at the raw cotton stage.

Subsequently, a sliver having a thickness of 5.9 g / m was formed on the polyester raw cotton by a normal card process.

Subsequently, a combed cotton sliver of 2.36 g / m was produced in the same manner as the polyester sliver, placed on the drawing apparatus 1 provided with the capacitor 2 and the plate-like guide 3, and drafted at a drawing machine speed of 250 m / min. The running angle of the core side sliver and the sheath side sliver at this time was 40 °. The spinnability was good, the roller was wound, and there was no trouble.

Moreover, the core-sheath ratio in the sliver at the time of preparation was 30% for the core and 70% for the sheath by weight.

This sliver was passed through a rough spinning machine, which is a normal process, and then applied to a ring spinning machine to obtain a spun yarn having a cotton count of 30 s with a total draft of 30.5 times. The spinnability was good and there was no yarn breakage.

Tendon knitted fabric was knitted with a 28G single circular knitting machine using the short composite spun yarn thus obtained.

Next, in the dyeing process, this knitted fabric was scoured and relaxed, and then subjected to dyeing using a liquid dyeing machine in the same manner as normal T / C dyeing.

A knitted fabric with a basis weight after finishing of 145 g / m ² was obtained.

(Example 2)
In Example 2 of the present invention, 0.8 dtex micro raw cotton was used as the core side raw raw cotton, and a fabric was prepared by the spinning, knitting, and dyeing steps in the same manner as in Example 1.

(Example 3)
In Example 3 of the present invention, a sliver was prepared, and spinning, knitting, dyeing and processing were performed in the same manner as in Example 1 except that the length of the ring-shaped guide at the wire-type guide outlet was changed to 70 mm.

(Comparative Example 1)
In Comparative Example 1 of the present invention, the same polyester-dyed raw cotton and combed cotton as in Examples 1 and 2 were used, and the sliver arrangement was arranged so as to form a core-sheath structure in parallel in the drawing process. Similarly, a fabric was prepared by spinning, knitting, and dyeing processes.

(Comparative Example 2)
In Comparative Example 2 of the present invention, a polyester yarn-dyed raw cotton and combed cotton similar to Example 1 were used, and a thickness of 4.1 g / m was obtained using a normal spinning method, except that doubling was performed with a drawing machine. A sliver was prepared, and after a roving process, a spun yarn having a cotton count of 30 s was obtained using a normal ring spinning machine.

Thereafter, in the same manner as in Example 1, a fabric was prepared by spinning, knitting, and dyeing processes.

Table 1 shows the evaluation results of the span knitted fabrics obtained in Examples 1 to 3 and Comparative Examples 1 and 2 described above.

DESCRIPTION OF SYMBOLS 1,11 Stripping device 2 Capacitor 3 Plate-shaped guide 4 Sliver focusing guide 5 Wire-type guide 6 Ring-shaped guide 7 Core-side sliver hole 8 Sheath-side sliver hole 12 Inrent guide 13 Bar-shaped member 14 Block member 41 Notch 61 131 Hollow part 141 Opening part

Claims (11)

When producing a core-sheath-type composite spun yarn, a drawing apparatus that converges and kneads a core-side sliver arranged on the core side and a sheath-side sliver arranged on the sheath side,
A focusing guide that is provided in the front stage of the draft zone of the drawing apparatus and focuses the core-side sliver and the sheath-side sliver, and is provided in a subsequent stage of the focusing guide, and the focusing guide is focused in a spiral shape. A drawing apparatus comprising: a capacitor having a core-side sliver and a wire-type guide for twisting the sheath-side sliver. The capacitor is
The ring-shaped guide which is provided in the subsequent stage of the wire-type guide and further untwists the core-side sliver and the sheath-side sliver twisted by the wire-type guide in a ring shape. The drawing device described in 1. 3. The apparatus according to claim 1, further comprising a guide member that is provided in a front stage of the capacitor and that disposes the sheath-side sliver around the core-side sliver and feeds it to the capacitor. The guide member is
A rod-like member in which a core-side sliver hole for inserting the core-side sliver is formed along the axial direction;
A block member that can be inserted through the tip of the rod-shaped member, and that has an opening formed through the sheath-side sliver in a gap formed between the rod-shaped member and the rod-shaped member inserted and fixed; ,
The drawing apparatus according to claim 3, wherein 5. The apparatus according to claim 4, wherein a cross section of the opening has a flat shape. The guide member is
A plate having a core-side sliver hole through which the core-side sliver is inserted, and a plurality of sheath-side sliver holes that are disposed around the core-side sliver hole and respectively pass through a part of the sheath-side sliver. The drawing apparatus according to claim 3, wherein the drawing apparatus has a shape. In the manufacturing method of the core-sheath type composite spun yarn,
It has a drawing step of drafting after twisting a core-side sliver arranged on the core side and a sheath-side sliver arranged on the sheath side by passing through a capacitor having a spiral wire-shaped focusing guide. A method for producing a core-sheath type composite spun yarn. The drawing step includes
The core-sheath composite according to claim 7, wherein the core-side sliver and the sheath-side sliver twisted by the wire-type focusing guide are untwisted by a ring-shaped guide that forms a ring before drafting. A method for producing spun yarn. The method for producing a core-sheath type composite spun yarn according to claim 7 or 8, wherein a weight ratio of the core-side sliver to the sheath-side sliver is set to 5:95 to 45:55. A core-sheath type composite spun yarn manufactured by the method for manufacturing a core-sheath type composite spun yarn according to any one of claims 7 to 9. A woven or knitted fabric comprising 20% by weight or more of the core-sheath type composite spun yarn according to claim 10.

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