JPH06248528A - Spun yarn and multicomponent spun yarn rich in surface variety and its production - Google Patents

Abstract

PURPOSE:To obtain spun yarns rich in surface variety like woolen yarns by feeding plural fleeces from a front roller of a ring spinning frame in a specific condition and twisting them at the back of the front roller. CONSTITUTION:Rovings A and B are fed in different velocities from a front roller 8 of a ring spinning frame respectively and twisted at the back of the front roller. The feeding velocity of the roving B forming a sheath part is increased to 10-50% that of the roving A forming a core part and the roving B is fed in their spread state. Staple fibers in the sheath part do not essentially migrate into the staple fibers in the core part, so it is able to obtain thin clothing rich in a surface variety and having a warm feeling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spun yarn having a variety of surface changes, a composite spun yarn, and a method for producing the same. More specifically, in a yarn cross-sectional form, a fine count spun yarn or a composite spun yarn that has a layered structure such as a core and a sheath, and has loosened loops and slabs arranged on the yarn surface layer (corresponding to the sheath). The present invention relates to a spun yarn or a composite spun yarn having high value in surface quality, feel and physical properties of knitted fabric.

[0002]

2. Description of the Related Art Conventionally, as a spun yarn having abundant surface changes, a woolen yarn obtained by a Mule spinning machine is a typical example. Compared to worsted yarns, woolen yarns are made of short-haired or fluffed fibers, so that the fiber orientation in the yarn axis direction is not uniform. Therefore, the woolen yarn has been used for thick clothing with a variety of surface changes, as represented by Tweed, because of its elasticity and moisture retention.

[0003]

However, there is a drawback in that fine yarn count cannot be spun out since the limit yarn count of the woolen yarn is 12 at most in metric count. When considering the lifestyle and the environment of living space these days, the demand for woolen yarn has decreased dramatically while thin clothing occupies the mainstream. On the other hand, while consumers' needs are diversifying, their obsession with thin clothing with a warm and rich surface is extremely strong,
The current situation is that it is difficult.

[0004]

DISCLOSURE OF THE INVENTION As a result of intensive studies to solve the above-mentioned conventional problems, the present invention obtains a novel spun yarn such as a woolen yarn, which is rich in surface change, with a conventional ring spinning machine. We found a new method, found a more stable and inexpensive method, and made a proposal.

The present invention has the following configuration.

That is, it is a spun yarn consisting of at least two short fiber groups, and the spun yarn is bundled by the actual twist, and the at least one short fiber group mainly constitutes a sheath portion of the spun yarn. The at least one other short fiber group mainly constitutes the core portion of the spun yarn, and the short fiber group constituting the sheath portion exists in the surface layer portion of the spun yarn and is loose or slack. Spinning with rich surface changes, characterized in that it is arranged around the core portion without substantially migrating inside the short fiber group constituting the core portion and forming a loop or slab. It is a thread.

[0007] A composite spun yarn with a rich surface change characterized in that a filament yarn is wound around the outer peripheral portion of the spun yarn.

Furthermore, when feeding a plurality of fleeces from the front roller of the ring spinning machine at different speeds, the sheath portion is formed at an overfeed rate of 10 to 50% with respect to the feeding speed of the short fiber fleece forming the core portion. A method for producing a spun yarn rich in surface change, characterized in that a system for feeding a short fiber fleece to be formed in a widened state is provided and fed out, and after the front roller is united and twisted.

Furthermore, when a plurality of fleeces are fed from the front roller of the ring spinning machine at different speeds, the sheath portion is formed at an overfeed rate of 10 to 50% with respect to the feeding speed of the short fiber fleece forming the core portion. While providing a system for feeding the short fiber fleece to be formed in a state where the width is widened, the filament fiber yarn is fed at an overfeed rate of 2 to 10% with respect to the feeding speed of the short fiber fleece that constitutes the core portion, Manufacture of a composite spun yarn rich in surface change, characterized in that the short fiber fleece forming the core portion, the short fiber fleece forming the sheath portion and the filament yarn are united and twisted after the front roller. Is the way.

The present invention will be described in detail below, but the manufacturing method will be described first.

In the method of the present invention, the plurality of short fiber groups are not limited in their raw materials such as natural fibers and synthetic fibers, and may be a mixture thereof, or the same kind or different kinds. May be Further, the single yarn denier of the short fibers constituting the short fiber bundle is not particularly limited, and for example, a denier of 0.1 denier to 10 denier can be used. The point is that it may be composed of short fibers having a fiber length suitable for the draft gauge.

In the present invention, the spinning limit yarn count of the conventional woolen yarn is at most 12 in metric, but in the present invention, high-quality yarn count of 16 to 150 is possible although it depends on the single yarn denier of the short fiber. Although the spinnability limit varies depending on the type of staple fiber, denier, number, fiber length, etc., for example, the number of staple fibers constituting the core is 30 or more, and the number of staple fibers constituting the sheath is 40 or more. Then, if spinning is possible, if the single yarn denier of the short fibers is 5 denier, the total denier is 350 denier and the metric number is 25.7 (= 90000/350). If the single yarn denier is 1 denier, the total denier is 70 denier and the metric number is 128.6 (= 9000/70).

The plurality of short fiber fleeces are in a form in which they are fed out at least in a separated form when fed out from the front roller of the spinning machine, and the feeding speed of each fleece is different (feed difference). It is essential to give). And the feed difference is 1
It is important to continue the high feed rate difference of 0 to 50%. Here, a preferable range from the spinnability and yarn quality is an overfeed rate of 20% or more and 40% or less,
Especially when it exceeds 50%, yarn breakage occurs frequently, which is not preferable in terms of operability and yarn quality. On the other hand, if it is less than 10%, spun yarn / composite spun yarn which is intended for the present invention and is rich in surface change cannot be obtained, which is not preferable.

Conventionally, Japanese Patent Publication No. 39-25435, Japanese Patent Publication No. 48-9223, and Japanese Patent Publication No. 56-11.
In Japanese Patent No. 775, a method for producing a multi-layered yarn by giving a feed difference is proposed. However, in all cases, the feed difference is 10% at the highest value, and these methods cannot maintain a high feed rate difference in the range of more than 10% and 50% or less, and the spun yarn or the composite spinning of the present invention is not possible. You can't get the thread.

Further, in the present invention, it is needless to say that the above-mentioned overfeed rate is continued, and the short fiber fleece width which constitutes the sheath portion is widened as much as possible in the opened state, and no collector is particularly used. Is an important point,
This point is also clearly different from the above conventional method.

By adjusting the condition environment as described above, even if the fleece width exceeds the limit of 10%, which is the limit when twisting two fleeces originally gathered by a collector or the like, the fleece width is wide, and therefore, when twisting, The short fiber bundle of the core component is twisted in such a manner that the twisting start point is not specified. As a result, loosened / tarumi loops and slabs due to multiple twists at the same point are generated, and as a result, spun yarn / composite spun yarn with abundant surface changes can be stably obtained.

Furthermore, by using a front bottom roller with a striated groove, which will be described later with reference to the drawings, uneven crimps are added to the short fibers of the sheath component, and a loose or slack shape which cannot be obtained by the conventional method is obtained. The loops can form slabs irregularly (naturally).

Next, the spun yarn or the composite spun yarn of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an enlarged schematic view showing an example of a spun yarn of the present invention which is composed of two kinds of roving yarns and which is rich in surface variation. Short fiber bundles 3 are arranged around the short fiber bundles 2 constituting the core portion in a state where the short fiber bundles 3 do not enter the region of the short fiber bundles 2 and are migrated in units of the short fiber bundles in the outer peripheral region thereof. Loose, slack loops 4 and slabs 5
Have in the thread axis direction. Further, the degree of filling of the short fiber bundles 2 forming the core portion and the short fiber bundles 4 forming the sheath portion is different. This is because, when the two are twisted together, the short fiber group 3 arranged in the sheath portion is excessively supplied at the above-mentioned overfeed rate than the short fiber group 2 arranged in the core portion.

It can be said that the spun yarn of the present invention more closely resembles a woolen tone in this respect as well, and it cannot be overlooked that the woolen yarn has an appearance with a large number of fluffs 6 appearing. In addition, it is bulky like woolen yarn.

On the other hand, FIG. 3 is an enlarged schematic view of a spun yarn obtained by conventional ring spinning. The conventional spun yarn is low in bulk only with the appearance of the fluff 6, and has a rod-shaped yarn appearance. Further, it does not have a two-layer structure like a core / sheath but has a side-by-side composite form.

Further, FIG. 2 shows an example of the composite spun yarn of the present invention rich in surface variation, which is twisted with filaments 7 in a manner to hold the short fiber group 3 in the sheath portion of the spun yarn similar to that of FIG. It is an expansion schematic diagram.

Next, the manufacturing method of the present invention will be described in more detail with reference to the drawings.

FIG. 4 is a schematic process diagram showing an example of a method for producing a spun yarn of the present invention which is composed of two roving yarns A and B and which is rich in surface variation.

First, a roving A which will form the core,
The roving yarn B which forms the sheath is supplied to a normal draft area of 3 or 4 lines, and each short fiber group (in FIG. 4, the roving yarns A and B are not bundled by the collector). 2) and 3), the speed at which the fibers are sent out from the front roller is in the relationship of the short fiber group 2 << short fiber 3, and the feed difference amount is set as the feed rate within the range of 10 to 50% as described above. Will be issued.

The feed difference amount is imparted by the front bottom roller 7 and the front top roller 8 having the streak groove, and the top roller 8 further has the smooth surface 8-a in the circumferential direction and the streak groove portion. It has a concavo-convex surface 8-b in the shape of a bite, and the short fiber fleece of roving A has a smooth surface 8.
-A, while the short fiber fleece of the roving B is delivered in a relaxed state from the uneven surface 8-b. Here, the latter is sent in a gear meshing engagement state, so the fleece width is wide (tape with width),
In addition, it has a shape with uneven crimps, which is over-fed to the former. The feed amount can be freely adjusted by the gear biting amount. Therefore, the short fiber bundle (component of roving yarn A) that forms the core of the spun yarn serves as the central column, and the bundle of short fiber (component of roving yarn B) that forms the sheath around the column is the core. Placed around the department. In the figure, snell wire 9 and traveler 1
0 and the yarn winding bobbin 11 are shown, respectively.

FIG. 5 shows a filament yarn 1 in a part of the spinning machine.
A feed device 14 for supplying 3 is provided, and the feed rate of the short fiber bundles constituting the core is 3 to 10
% Of the overfeed rate, and by twisting together with the short fiber group of the core part and the sheath part, a method for producing a composite spun yarn in which the composite yarn is twisted in such a manner as to enter the sheath part having a small packing density. It is a process schematic diagram showing an example.

FIG. 6 shows an enlarged view of an example of the vicinity of twisting (immediately after the front roller) where the spun yarn of the present invention is formed.

The fleece of roving A is the collector 1 behind
No. 4 (not required) sends out the bundle in a bundled form, whereas the fleece of the roving B is supplied without a collector and in a gear-engaged state, so the width of the fleece is widened. It is easy to understand the state of being sent out. That is, it is important not to use a collector for at least the fleece (roving yarn B) that constitutes the sheath portion.
Moreover, it is clear that the fleece of the roving B is twisted around the short fiber bundle 2 in the twisted state while being entangled in a relaxed state. In the relaxed state, individual short fibers change irregularly (in other words, the twisting start point changes irregularly), so loose and slack loops occur irregularly (naturally), and the same A slab will be formed because it will be twisted many times in place.

Needless to say, when nep is added to the spinning raw material, the appearance of the yarn becomes more similar to that of woolen yarn, and the effect of further promoting the surface change aimed at by the present invention is exerted.

[0031]

The present invention will be described in more detail based on the following examples.

Example 1 As the short fibers composing the core, 1.5 denier polyester dyeable at atmospheric pressure and made of Ken-spun fiber having an average fiber length of 110 mm (made of tow as a tear-off sliver) 2.5-meter metric roving yarn, while merino wool as the short fibers that make up the sheath exhibiting surface changes, quality No. 64 metric-2.5 roving yarn is used, drafted in the draft zone, and the front roller is smooth. The polyester short fiber fleece was sent out from the nip point, and the wool fleece was sent out from the gear bite nip point at an overfeed rate of 35% and twisted. The width of the wool fleece at this time was about 3 to 6 mm. The number of twists was 520 T / m, and the spinning count was metric number 24.

When the cross-sectional morphology of the obtained yarn was observed, it was a spun yarn having a two-layer structure in which a polyester short fiber bundle forms a core portion and wool short fibers are arranged at the outer peripheral portion thereof, that is, the sheath portion. When the side surface of the yarn was observed, it was found that there were 52 loose / slack loops / m and 37 slabs (including nep-shaped loops) / m.

For comparison, the roving used in this example was
The metric number that was simply aligned and spun as in the conventional method
In the case of No. 24, there were no loose or slack loops or slabs on the surface, and the number was 0 / m.

The spun yarn of the present invention (Example 1) was used for 2/2.
When weaving with the texture of mat and dyeing finish,
A bouclé-like lightweight fabric with a rich surface change, a soft texture with 100% wool, and excellent heat retention was obtained.

Example 2 3 denier polyester having a strength of 4.7 g / d as a short fiber bundle of a core component, a roving yarn made of 89 mm variable cut raw cotton, 48% merino wool as a short fiber bundle of a sheath component, a normal pressure cationic dyeable type The rovings mixed with 48% polyester and 4% rayon nep were each fed to a ring spinning machine. The roving count was 2.5 for metric. The sheath component has an overfeed ratio of 30% with respect to the core component, and further, a polyester filament yarn of 50 denier 24 filaments is added to the core component by 7.0% by a filament yarn feeding device provided in a part of the spinning machine. It was united and twisted with the one fed at the feed rate. The spinning count was 16th of metric and the number of twists was 400 T / m.

The obtained yarn was a spun yarn having abundant surface changes, and it became a yarn having an appearance similar to that of a woolen yarn due to the presence of nep. When observing the side of the thread, 48
12 pieces / m, slabs (including nep-shaped pieces) 12 pieces / m
there were. Further, the filament yarn was twisted in the outer peripheral direction of the yarn, and the short fiber group having a small packing density constituting the sheath component was firmly fixed.

When the yarn was woven with a herringbone design and dyed and finished, a fabric having a different color effect, rich in surface change and excellent in heat retention and having no heavy weight feeling was obtained.

Example 3 A 1.25 denier 38 mm cut roving made of polyethylene terephthalate was used for the short fiber bundle constituting the core portion, and a roving yarn made of carded cotton of US cotton was used for the short fiber bundle constituting the sheath portion.
The overfeed rate of the short fiber fleece of the sheath to the core was set to 28%, and British cotton count 10th (17th metric) was spun in the same manner as in Example 1. Number of twists is 4
It was set to 23 T / m.

The obtained yarn was a spun yarn in which a large number of minute slacks, slack loops and slabs having a small pitch were present, and which had extremely many fine fluffs.

The spun yarn was made into a knitted fabric with a 1 × 1 rib structure on a 7 gauge flat knitting machine, and the surface touch was 100% cotton.
A knitted fabric with a feeling of% and a rich surface change was obtained.

[0042]

The spun yarn or the composite spun yarn of the present invention is
It is a yarn that is rich in surface change of woolen yarn tone, and is capable of providing warm and thin clothing that is rich in surface change even in the fine count region where woolen yarn is impossible.

Further, in the yarn structure of the present invention, the degree of focusing of the fiber bundle group in the sheath portion is extremely less than the degree of focusing of the fiber bundle group in the core portion due to twisting. This means that the bulk density is high, beaver finishing (brushed), furano,
It is the most suitable for the milled finish (raised and creped) found in Saxoni.

Further, the knitted fabric using the spun yarn or the composite spun yarn of the present invention has a surface change, has a good texture, and has the effect that a lightweight clothing can be provided.

In the method of the present invention, the surface of the woolen yarn is changed by modifying the front roller portion of the conventional ring spinning machine without using special spinning equipment for spinning (such as Mull spinning machine). Not only it becomes possible to obtain rich spun yarns and composite spun yarns, but also spinning in the fine count region, where woolen yarns are not possible, can be manufactured stably and at low cost, which has a remarkable industrial effect. Play.

[0046]

[Brief description of drawings]

[0047]

FIG. 1 is an enlarged schematic diagram showing an example of a spun yarn with abundant surface changes according to the present invention.

[0048]

FIG. 2 is an enlarged schematic view showing an example of a composite spun yarn of the present invention rich in surface change.

[0049]

FIG. 3 is an enlarged schematic view of a spun yarn obtained by conventional ring spinning.

[0050]

FIG. 4 is a process schematic view showing an example of a method for producing a spun yarn having abundant surface changes according to the present invention.

[0051]

FIG. 5 is a process schematic view showing an example of a method for producing a composite spun yarn with rich surface changes according to the present invention.

[0052]

FIG. 6 is an enlarged view of an example in the vicinity of twisting (immediately after the front roller) in which the spun yarn of the present invention is formed.

[0053]

[Explanation of symbols]

1-0: Spun yarn of the present invention rich in surface change 1-1: Composite spun yarn of the present invention rich in surface change 1-2: Spun yarn obtained by conventional ring spinning 2: Short constituting core part Fiber bundle 3: Short fiber bundle constituting the sheath portion 4: Loose, slack loop 5: Slab (including nep) 6: Fluff 7: Front bottom roller 8: Front top roller 8-a: Smooth surface of front top roller 8-b: Concavo-convex surface of the front top roller that is engaged with the front bottom roller 9: Snell wire 10: Traveler 11: Thread winding bobbin 12: Filament thread 13: Feed device 14: Collector A: Short fiber constituting core Bundle of roving yarn B: roving yarn of short fiber bundle constituting the sheath

Claims (8)

[Claims] Claim: What is claimed is: 1. A spun yarn comprising at least two staple fibers, the spun yarn being bundled with an actual twist, and the at least one staple fiber group mainly constituting a sheath portion of the spun yarn. The at least one other short fiber group mainly constitutes the core portion of the spun yarn, and the short fiber group constituting the sheath portion exists in the surface layer portion of the spun yarn and is loose or slack. Spinning with rich surface changes, characterized in that it is arranged around the core portion without substantially migrating inside the short fiber group constituting the core portion and forming a loop or slab. yarn. 2. A composite spun yarn with abundant surface changes, characterized in that a filament yarn is wound around the outer peripheral portion of the spun yarn according to claim 1. 3. A group of staple fibers mainly constituting a core is a synthetic fiber, and a group of staple fibers mainly constituting a sheath is a natural fiber 100.
%, Or a short fiber group containing at least a natural fiber, The spun yarn rich in surface change according to claim 1. 4. A staple fiber group which mainly constitutes a core is a synthetic fiber, and a staple fiber group which mainly forms a sheath is a natural fiber 100.
% Or a short fiber group containing at least a natural fiber, The composite spun yarn rich in surface change according to claim 2. 5. When feeding out a plurality of fleeces from the front roller of a ring spinning machine at different speeds, the feeding speed of the short fiber fleece forming the core is 10 times.
A short fiber fleece that forms a sheath portion with an overfeed rate of ˜50% is provided with a system that sends it out in a state where the width is widened, and is sent out, and after the front roller is united and twisted, it has a variety of surface changes. Manufacturing method of spun yarn. 6. When feeding out a plurality of fleeces from a front roller of a ring spinning machine at different speeds, the feeding speed of the short fiber fleece forming the core is 10 times.
A short fiber fleece forming a sheath portion with an overfeed rate of ˜50% is provided with a system for feeding in a state where the width is widened, and further, it is 2 to 10% of the feed rate of the short fiber fleece constituting the core portion. While delivering the filament yarn at an overfeed rate, the short fiber fleece forming the core portion and the short fiber fleece forming the sheath portion and the filament yarn are united and twisted after the front roller. A method for producing a composite spun yarn that is rich in surface changes. 7. The surface variation according to claim 5, wherein the short fiber fleece forming the sheath is delivered by a delivery system in which the grips of the front top roller and the front bottom roller are in meshing engagement. Manufacturing method of spun yarn. 8. The rich surface change according to claim 6, wherein the short fiber fleece forming the sheath portion is fed by a feeding system in which the holding portions of the front top roller and the front bottom roller have a meshing engagement state. Manufacturing method of composite spun yarn.