JPS5841916A - Preparation of spun yarn having sheath-core structure - Google Patents

Abstract

PURPOSE:To obtain the titled spun yarns of stabilized quality without the limitation by the properties of a core yarn, by laying a roving of the core component on the central part of a sliver for forming the outer layer, bringing the outer layer side of the sliver into the full contact with a guide, twisting one end of the sliver in the width direction delayed a given angle, and wrapping the core yarn in the outer layer. CONSTITUTION:A sliver (B) forming the outer layer is passed through a guide (G1), held by back rollers 1 and l' and fed to the bottom of a two-stage guide (G2). A roving or sliver (A) constituting a core yarn part is simultaneously fed to the top of the two-stage guide (G2), laid on the central part of the sliver (B), passed through a collector (G3) and held by front rollers 3 and 3'. The outer layer of the sliver (B) is then brought into the full contact with a guide (G4) at an angle (beta) to the vertical face parallel to the shafts of the front rollers 3 and 3', and one end of the sliver (A) in the width direction is delayed at least 180 deg.C in the twisting direction compared with the other end and twisted to wrap the core yarn part. The twisted sliver is then passed through a flyer 4 and wound aroung a roving wooden bobbin 5.

Description

DETAILED DESCRIPTION OF THE INVENTION Conventionally, raw material roving for spinning has generally been an aggregate of short fibers. Various techniques have been proposed for obtaining a blended yarn having a pod core structure in such roving yarn using short fibers. For example, Japanese Patent Publication No. 2-3.2jj proposes a roving having a sheath core structure. However, this method is not stable because the properties of the short fibers used to make the core rovings, such as the number of crimp, degree of crimp, crimp form, single fiber denier, and fiber length, are quite limited. It was difficult to obtain a yarn with a sheath core structure of high quality.

The present invention has been made in view of the problems that conventional rovings have, and its purpose is to provide a method for producing various types of spun yarns in a variety of ways, and to provide a method for producing various types of spun yarns. The purpose of the present invention is to provide a new method for producing a spun yarn having a pod core structure, which is not limited by the properties of short fibers.

In order to achieve this objective, the present invention consists of the following configuration.

That is, the present invention provides a method for manufacturing a spun yarn with a sheath core structure in which the roving or sliver constituting the core yarn portion and the sliver constituting the outer layer are overlapped and supplied, heated, roved, and then spun. The sliver side constituting the outer layer of the stacked fiber group is brought into contact with the entire surface of the sliver as a guide, and at least /? 00 This is a method for producing a spun yarn with a sheath core structure, which is characterized by heating with a delay so that the core yarn portion is wrapped.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to make it easier to understand the configuration and embodiments of the present invention, the following description will be given with reference to drawings. Figures 1 to 3 illustrate the manufacturing apparatus according to the present invention, and Figure 1 is a plan view and Figure 2 is a top view.
The figure is a side view, and FIG. 3 is a front view. In the manufacturing method of the present invention, the most important point is that the guide G4t is provided so that the slivers constituting the outer layer of the stacked fiber group at the heating start position K are brought into almost entire contact with each other. When spinning in a normal manner without using this guide log, the roving or sliver A supplied to form the core yarn does not become the core yarn of the stably spun roving and appears on the surface. is often the case. The present invention completely solves these problems. That is, in the present invention, the sliver constituting the outer layer passes through the draft zone of the roving frame, exits the front roller 3.3', and the sliver constituting the outer layer of the stacked fiber group at the heating start position K. Make the whole surface contact with the guide. Almost the entire surface contact at this time makes the contact with the guide G41 faster and the contact pressure with the guide Gp stronger than the other end of the sliver B in the width direction coming out of the front roller 3.3'. Then, by gradually weakening the core yarn and heating with a delay of at least /700 in the twisting direction, the core yarn portion is wrapped.

The manufacturing method of the present invention will be explained in more detail below.

In FIGS. 1 and 2, the sliver B forming the outer layer passes through the supply guide G/, is gripped by the pack rollers 1, 1', and is supplied to the lower part of the lower guide G2. At this time, the roving or sliver yarn constituting the core yarn portion is also fed to the upper part of the two-stage guide G2, and the sliver yarn overlapped in the center of the sly C-H forming the front side outer layer is fed to the collector. It passes through G3 and is gripped by front roller 3.3'. At this time, the ratio of the sliver width of the sliver B forming the outer layer to the sliver width of the roving or sliver A forming the core yarn portion is preferably about 3:/-22/. The fleece that has come out of the front rollers 3, 3' passes over the guy FGp and is twisted by a roving machine to obtain a roving yarn Y having a sheath core structure, which passes through a flyer 4 and is wound onto a roving woodwind 5. At this time, as a preferable installation condition for the guide art, it is desirable that the angle β between the horizontal plane parallel to the axes of the front rollers 3 and 3' of the roving frame frame and the idle log is 00 or less.

When it exceeds 600, it becomes difficult to heat the sliver B with a delay in the twisting direction compared to the other end in the width direction of the sliver B constituting the outer layer of the stacked fiber group at the heating start position K. This occurs, and there are parts where the core yarn cannot be wrapped.

The side view of FIG. 2 shows the movement of the roving or sliver yarn constituting the core yarn portion and the sliver B forming the outer layer. FIG. 3 shows that the fleece spun from the front roller 3.3' passes over the guy FGQ, passes through the flyer 4, and is wound onto the roving wood tube 5.

At this time, as a preferable condition for the guide G4t, it is desirable that the shape be an arcuate shape in consideration of catching of the sliver single fibers and irregularities of the roving Y. The angle α between the guide GQ and the horizontal plane is 6θ
It is desirable to keep it below °.

When 6θ0 or more, the guide Gg and front roller 3.3
Contact length t with the fleece spun from ' (@X diagram)
becomes longer, causing unevenness in the roving Y having a sheath core structure, which may cause breakage of the roving. FIG. 9 is an enlarged view of the contact area between the guide G4t and the sheath-core structure roving Y, and its shape has a radius R of /, θ~/! θ■ is used, and the contact length t with the roving Y is! It is desirable to install the guide Gp at ~/θθ■. At this time, if the shape of the guide GQ is less than the radius R/θ-, there is a risk that the single fibers of the sliver may be wrapped around the guide GQ, and if the radius R is more than 730-, the guide G4 and the pod core structure roving Y. The contact length t becomes longer, causing unevenness in the roving Y having a sheath core structure, which causes the roving to break. Also,
When the contact length t between the roving Y and the guide G& is less than 1,
At the heating start position K, there occurs a part where it is difficult to heat the sliver B at one end in the width direction and at a delay of /♂θ° in the twist direction compared to the other end in the width direction of the sliver B constituting the outer layer of the stacked fiber group. If the contact length t between the roving Y and the guide G4t is 7001 or more, unevenness will occur in the sheath core structure roving Y, which may cause the roving to break. It may cause. 'Example/Seven examples of manufacturing conditions for a pod core structured spun yarn spun by the method of the present invention are shown.

Spun yarn standard Benbelb (cupra)'/;dx31■da. 1
Thread part cashmi o y (7ri! J le) /', jd
)Q/m 1aoqb Outer layer partially spun yarn 1768 Nm
, J' 2 j T/m7m Benbelb3d X
Bemberg/, J'dXj/III/θθti rovings were prepared by blending cotton, carding, filament, and roving using only J'dXj/J'dXj/III/θθti roving.

Roving properties: roving weight θ, ♂θtAn, roving twist number/j, 2
T/m Next, make cashmilon/, j d
/■/θθ Sorry sliver sliver.

Sliver Properties Nissliper Weight/, ♂f/m order Nichenberg roving and cashmilon sliver were placed in a roving machine under the following conditions to create a pod core structure roving.

Mechanical conditions of the roving machine: Total draft: 70.0 times break draft /, Twist number: 23.6 T/m At this time, the feeding position of the penvelve roving to the roving machine was between the pack roller and the middle roller.

Using the pod core structure roving prepared above, spinning was carried out by a commonly practiced method. Next, we dyed only Cashmilon with a cationic dye from this spinning system, then made it into a knitted fabric and investigated the distribution of Cashmilon and Bemberub. As a result, we found that the spun yarn had a stable sheath core structure, with Cashmilon in the outer layer and Benberub in the core yarn. obtained.

Example 2 Seven examples of manufacturing conditions for a pod core structured spun yarn spun by an uninvented method are not shown. - Spun yarn standard Benbelb (Cupra') /JdXj/■D θchi core yarn part Oak core yarn part Calamilon /, jdXj/■6
θchi outer layer partially spun yarn 1/48 Nm, tl=θ theory Penpelg/, 3 d
00% sliver was created.

Sliver properties Varnished striper 1 place J, o t/m Next, cashmilon/, j d X j'/■ Net, mixed batting cotton,
Cart, striated force i/'-07/, jdxj /wp
I created an a100 chisliper.

Sliver properties Varnish Sliper weight 3. θf/m Next, a Bemberge slipper and a Cashmilon slipper were placed in a roving machine under the following conditions to produce a 6-structure roving yarn.

Mechanical conditions of Rover machine total draft 70.0 times break draft /,! Number of twists: 20 Tim At this time, the benbelv roving was fed to the roving machine just before the pack roller.

Using the pod core structure roving prepared above, spinning was carried out by a commonly practiced method. Next, we dyed this spun yarn with a cationic dye for only cashmilon, and then made it into a knitted fabric to examine the distribution of cashmilon and benberub.As a result, we found that the spun yarn with a sheath core structure, in which cashmilon is in the outer layer and benberub is in the core yarn, is stable. Obtained.

According to the manufacturing method of the present invention, the pod core structure spinning system is not significantly restricted by the properties of the short fibers, such as the number of crimp, degree of crimp, crimp form, single fiber denier, fiber length, etc., and is stable. It became possible to obtain a spun yarn with a sheath core structure.

[Brief explanation of the drawing]

@/The figure is a plan view of the roving frame showing the implementation state of the present invention, the second
The figure is a side view, and the figure @3 is a front view. FIG. 9 is an enlarged view of the guide, showing the state of contact with the sheath core structure roving. Patent applicant: Asahi Kasei Kogyo Co., Ltd. Figure 3 Figure 4 Procedural amendment (voluntary) Date of January 2nd, 1982 Haruki Shimada, Commissioner of the Patent Office L. Indication of the case: 1980, Jigengo No. 1378
28 No. 2 Name of the invention Process for producing pod-core structured spun yarn a Relationship with the case of the person making the amendment Patent applicant 1-2-6-Tun Dojimahama, Kita-ku, Osaka-shi, Osaka Prefecture Drawings to be amended "Figure 1"

Claims (1)

[Claims] In the manufacturing method of yarn with a sheath core structure, in which the roving or sliver constituting the core yarn part and the sliver constituting the outer layer are overlapped and supplied, heated and roved, and then spun, the heating start position in the roving is By bringing the sliver side constituting the outer layer of the stacked fiber group into contact with the entire surface of the sliver as a guide, and heating the sliver with a delay of at least / / 06 in the twist direction compared to one end in the width direction of the sliver and the other end in the width direction. A method for producing a spun yarn with a sheath core structure, which is characterized by wrapping the core yarn part.