JP3170042B2 - Composite yarn and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite yarn in which staple fiber components do not easily fall off and have good stiffness resistance and a method for producing the same.

[0002]

2. Description of the Related Art A composite yarn formed by twisting a filament and a staple fiber component has a texture similar to a spun yarn,
In addition, it has the feature of having the same strength as filament, but when the amount of staple fiber component is small, the enveloping property between the staple fiber component and the filament is insufficient, so that the finishing process, woven fabric preparation process, weaving process, and knitting process are performed. In the latter step, the staple fiber component easily falls off, causing uneven dyeing in the dyeing step or the like, resulting in a product with poor appearance.

For this reason, Japanese Patent Publication No. Sho 50-31321 discloses a method in which double filaments and double rovings are used to supply each filament to each roving under a tension state, and to twist a ply yarn after passing a front roller. As described in JP-A-106534, a method using double filaments and single roving has been proposed.

[0004]

However, in Japanese Patent Publication No. 50-32121, each filament is supplied to each roving under the state of a tension, so that the filaments become the core when one composite yarn is considered. Because the roving is covered, the roving is easy to fall off against ironing and even if it is twisted after passing through the front roller, it is harder to fall off as it is twisted, but it still remains easy to fall off There are inconveniences.
Double filament according to -106534,
The method of single roving aims to completely cover the double filament as a core and the roving as a sheath, and the composite yarn is disadvantageous in that the roving is easily exposed to the outer layer so that the roving is easily dropped off. The present invention has been provided for the purpose of solving such a disadvantage.

[0005]

The present invention is a composite yarn comprising two filaments and staple fibers, wherein the composite yarn is twisted such that one filament is in the outer layer and the staple fibers are in the core. The first composite yarn is formed by combining the first composite yarn with the outer layer, and the first composite yarn is twisted so that the first composite yarn becomes the core. The method for producing the composite spun yarn of the present invention When manufacturing composite yarn using a ring spinning machine, one of the steps is to use a stepped roller with small diameters at both ends of the front top roller except for the center in the width direction of the front top roller. From the other feeding device through the small diameter portions on both sides from the rear of the front top roller.
Filaments were one by one respectively supplied, whereas drafting supplies roving from back roller backward, Chuo diameter portion of the front top roller and the front Bottomu row
Spun and passed through a gripped the staple fleece between La, a method for producing a composite yarn, characterized in that the continuous twist spinning pressure. The supply rate of the filaments, Chuo diameter portion of the upper <br/> SL front top roller and the front bot
The staple fleece held between the rollers is spun out.
Speed (surface peripheral speed of the central large diameter part of the front top roller)
It is preferably a corresponding speed) yo remote 2-4% faster feed rate whenever.

The width of the central large-diameter portion of the front top roller through which the staple fleece passes is preferably about 8 mm to 12 mm, and the diameter of the small-diameter portions at both ends may be such that the filament is not affected by the pressure of the front top roller. The roving should be such that the staple fleece does not deviate from the central large-diameter portion of the front top roller and be as close as possible to one of the filaments, preferably 0.5 to 1.5 mm from the center of the large-diameter portion. In order to stabilize the staple fleece passing position, it is preferable to set the position to the roving supply port of the draft part using a trumpet and supply the roving.

The two filaments emerging from the front top roller preferably form a clean Y-shape, and the staple fleece is offset from its center to form a first composite yarn with one of the filaments.

[0008] The feed rate of the filament is controlled by another feed device above the draft part.
Feed speed of the continuous yarn is to produce a composite yarn in which the filaments in the outer layer, Chuo diameter description of front top rollers
Staple gripped between the unit and the front bottom roller
Speed at which fleece is spun (within front top roller)
Must faster rate) good remote corresponding to the surface velocity of the Hisashidai diameter, preferably from 2% to 4%.

In order to improve the entanglement between the filament and the staple component, the filament is preferably a multifilament rather than a monofilament. Also,
The materials of the two filaments to be supplied may be the same or different.

[0010]

The supply filament and the supply roving at the front roller nip point for obtaining a composite yarn having a sheath-core structure and a high coverage with the step of the stepped front top roller and the trumpet provided at the roving supply port of the draft part. The condition that the relative position with respect to the staple fleece is kept constant is satisfied.

The two filaments coming out of the front top roller form a clean Y-shape, and the staple fleece passing therethrough is biased to one side from the center of the Y-shape. Before forming, one filament first covers the staple fleece to form the first composite yarn, and the other filament immediately covers between the filaments of the first composite yarn, thereby increasing the coverage of the staple fleece. As a result, the staple fiber component is less likely to fall off, resulting in a composite yarn having good stiffness resistance.

[0012]

【Example】

Embodiment 1 The present invention will be described with reference to the drawings. FIG. 1 is a schematic explanatory view of a spinning section in the present invention, and FIG. 2 is an overall view of a manufacturing method in the present invention. Using the apparatus shown in FIG. 1 and FIG. 2, a Tetron multifilament having 24 constituent fibers and a total denier of 50 denier was used as a filament, and cotton fiber was used as a staple fiber component.

The front top roller (1) uses a stepped roller having a large-diameter portion (2) having a width of 9 mm at the center in the width direction and having both ends having a diameter smaller by 3 mm than the diameter of the large-diameter portion. ), The two multifilaments (5) and (5) from the back are fed to another feed device (4), a filament guide (6) (6), and a small diameter portion (3) (3) on both sides of the top roller (1). One by one is supplied sequentially, while the roving (8) is supplied from the back of the back roller (7) through the trumpet (9) and is drafted from the central large diameter portion (2) of the front top roller (1). It passed through a staple fleece (10), the feed rate of the multifilament, the upper SL front top roller Ang diameter
Staple gripped between the unit and the front bottom roller
Speed at which fleece is spun (within front top roller)
Set on a surface speed corresponding to the circumferential speed) good remote 2% faster feed rate of Hisashidai diameter, the twist coefficient 3.2, blended ratio multifilaments: cotton staple = 60: English 40 (wt%) The 32nd-count composite yarn (11) was spun. The result of observing the ironing state was very good.

[Embodiment 2] Using the apparatus of Embodiment 1 above,
The feed rate of the filaments using the same filament and staple fiber components as in Example 1, Chuo diameter portion of the upper SL front top roller and the front Bottomu roller between the
The speed at which the gripped staple fleece is spun (flow
Equivalent to the surface peripheral speed of the central large diameter part of the top roller
Set to be the rate) good remote 4% faster feed rate, the twist coefficient 3.0, blended ratio multifilaments: cotton staple = 65: 35 (spinning the composite yarn of English count 45 fastest in weight%) Issued. The result of observing the ironing state was very good.

[0015]

According to the composite yarn and the method for producing the composite yarn of the present invention, since the staple fiber component is highly coated with two filaments, the ironing resistance is increased, and the staple fiber component can be prevented from dropping off by sword. It is possible to increase the spinning speed of a ring spinning machine because a composite spun yarn without impairing the dyeing property is obtained, and a composite spun yarn having a low twisting coefficient (that is, a low twist number) and excellent ironing resistance is obtained. This has the effect of improving productivity.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of a spinning unit according to the present invention.

FIG. 2 is an overall view of a manufacturing method according to the present invention.

[Explanation of symbols]

1: front top roller, 2: large diameter part, 3: small diameter part,
4: feed device, 5: multifilament, 6: filament guide, 7: back roller, 8: roving, 9: trumpet, 10: staple fleece, 11: composite yarn , 12: front bottom roller

Claims (2)

(57) [Claims] 1. A composite yarn comprising two filaments and staple fibers, wherein the composite yarn is twisted such that one filament is formed in an outer layer and the staple fiber is formed as a core, and the first composite yarn is formed. A composite yarn formed and further comprising another filament twisted into an outer layer so that the first composite yarn becomes a core. 2. When manufacturing a composite yarn using a ring spinning machine, a stepped roller having a small diameter at both ends other than a central portion in the width direction of the front top roller is used as a front top roller, and a rear portion of the front top roller is used. Two filaments are supplied one by one from each of the other feed devices through the small diameter portions on both sides, while the roving yarn is supplied from the back roller rear side and drafted, and staple fleece is supplied from the central large diameter portion of the front top roller. A method for producing a composite yarn, comprising passing through, spinning, and continuously twisting and twisting.