JPS6331570B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a single yarn with good texture consisting of a spun yarn containing a cellulose-based natural fiber material and a thread of a protein-based natural fiber material, and which requires no sizing when used as a warp yarn. Concerning composite yarns.

Conventionally, a large number of composite yarns, so-called core yarns, in which a filament yarn is arranged in the core and natural fibers such as cotton fibers are arranged in the outer layer, have been produced in response to the need for lighter and thinner fabrics. However, filament yarn
Usually, there is almost no fluff, and since it is a continuous yarn, it has poor affinity with the natural fiber material of the outer layer that forms the core yarn, and therefore does not slip and form a good composite yarn. For this reason, a method is used to prevent the natural fiber material from slipping by adding an extremely high twist rate, for example, 900 t/m or more, when compositing.
Therefore, the core yarn obtained in this manner is inevitably inferior in terms of texture.

On the other hand, due to the trend towards natural fiber materials,
In response to demands for improved texture and functionality, many methods have been implemented to blend and composite different types of natural fiber materials. For example, there are many examples such as combinations with wool fibers, wool fibers and hemp fibers, silk fibers and cotton fibers, etc. However, due to the large differences in fiber length, fineness, bending resistance, etc. of each of these yarns, the spinning process and processing machinery are not compatible with each other, so it is necessary to match the fiber length to the shorter fiber length of the other yarn. However, the twisting process must be done knowing that the yarn count will become thicker, which is an extremely difficult task, and the yarn obtained also has an unsatisfactory texture.

In addition, when weaving these yarns without sizing with single yarns, only one material slips or yarn breakage occurs frequently, so they are usually used as double yarns.

The present invention was developed as a result of intensive research into a yarn form that does not have the drawbacks of yarns obtained by these conventional methods, has excellent post-processability, and has high quality and texture. To provide a composite yarn which is made of natural fiber material, has excellent texture, and can be woven with a single yarn without gluing.

The present invention has the following configuration to achieve this object. That is, the present invention provides a composite yarn comprising a spun yarn containing a cellulose-based natural fiber material and a yarn of a protein-based natural fiber material partially covering the outer layer of the spun yarn, the spun yarn comprising:
Fuzz of 1 mm or more with a fuzz index of at least 300 pieces/
10m or more, and 60 to 85 for the entire composite yarn
% by weight, and further characterized in that the twist direction of the composite yarn is the same as the twist direction of the spun yarn. The present invention will be explained in detail below with reference to the drawings.

The present invention makes use of the theory of core yarns, and when blending fibers together, yarn spots are unavoidable, and when blending yarns together, the basis weight of the fabric becomes too large, and due to the effects of different materials, the surface The structure of the core yarn was used to prevent color spots from appearing on the fabric.

However, the biggest drawback of the core yarn is that it has poor ironing resistance and poor post-processability due to the lack of affinity (lack of entanglement) between the core yarn and the outer layer fibers that make up the yarn. Therefore, accidents often occur in which the outer layer fibers easily slip, leaving only the core yarn. As a result of various studies regarding core materials, the inventors of the present invention found that a spun yarn containing a cellulosic natural fiber material with high yarn strength and a large amount of fluff is optimal as a core yarn. FIG. 1 is a side view of the composite yarn of the present invention,
In Fig. 1, the outer layer of spun yarn 1 containing cellulose-based natural fiber material is replaced by yarn 2 of protein-based natural fiber material.
is partially covered. In the present invention, the spun yarn includes a cellulose-based natural fiber material. As a cellulose-based natural fiber material,
Examples include cotton fiber and linen fiber. Although 100% cellulose-based natural fiber material is preferable, there is no problem even if other fiber materials are included in the form of a blend within a range not exceeding 50%.

Further, the spun yarn may be a single yarn, a double yarn, or a twisted yarn of more than one yarn, but a single yarn is usually preferable.
Of course, the twisting direction of a spun yarn described in the present invention refers to the final twisting direction of the yarn in the case of a double-twisted yarn or a double-twisted yarn or more. When these double threads are used as the core thread, the elongation of the composite thread can be improved.

The spun yarn has an average tenacity of 150 g or more, preferably 200 g or more, and a tenacity fluctuation rate of 15%.
It is preferable to have the following. This is required from a production standpoint.

Furthermore, the spun yarn has a fluff of 1 mm or more and a fluff index of at least 300 co/10 m, preferably 500
Must be at least 10m long. This is to improve the affinity with the yarn of the protein-based natural fiber material and to prevent slipping. The fluff index referred to herein was measured using an F-index tester manufactured by Shikishimabo Co., Ltd.

Next, the proportion of spun yarn in composite yarn is 60
Must be ~85% by weight. This is determined from the viewpoints of post-processability, refreshing texture, and cost merit. If it is less than 60% by weight, the yarn strength will be insufficient or the yarn will become thick, while if it exceeds 85% by weight, not only will the spinnability deteriorate, but the texture will also lose its luxurious feel.

Further, examples of the protein-based natural fiber material that partially covers the outer layer of the spun yarn include wool fibers and silk fibers. Among these, wool fibers are preferred in terms of texture. The form of the material refers to the form of yarn, that is, fleece.

Furthermore, the twist direction of the composite yarn must be the same as the twist direction of the spun yarn. This is to give tightness to the composite yarn and increase its affinity. From this point of view, the twist coefficient (inch system) is 20
It is preferable to keep it in the range of ~40.

As described above, according to the present invention, it is possible to obtain a composite yarn which is made of different kinds of natural fiber materials, has an excellent texture, and does not cause slip between the core material and the sheath material during ironing, which has never been seen before. Furthermore, this composite yarn has excellent properties such as being able to be woven as a single yarn without sizing, which is a remarkable effect. In addition, this composite yarn is a uniform yarn,
It has the characteristics of high yarn strength.

Example: When drafting preshrunk wool fiber roving on a spinning machine and spinning it from the front roller, cotton yarn
30'S (English cotton count, Z-direction twist, 19t/in) is fed just before the front roller and overlapped, 600t/in.
Add m twist in Z direction to 1/36 (metric number)
A composite yarn was produced. The thread strength of this composite yarn is
387g, worsted yarn (1/36 (metric count))
It showed 2.1 times of This composite yarn is warped without gluing, and is made into a plain woven fabric (warp density 65 threads/in, weft density
58 pieces/in) were woven. Warp thread breakage is 0.5 threads/1hr.
So, there was no difference from the case of 2/48'S. The fabric obtained by anti-dying and finishing the resulting fabric had a luxurious, refreshing wool touch and was excellent in water absorption and hygroscopicity.

[Brief explanation of the drawing]

FIG. 1 is a side view of the composite yarn of the present invention. 1... Spun yarn containing cellulose-based natural fiber material, 2... Yarn of protein-based natural fiber material.

Claims (1)

[Claims] 1. A spun yarn containing a cellulose-based natural fiber material;
A composite yarn comprising a yarn of a protein-based natural fiber material partially covering the outer layer of the spun yarn, the spun yarn having a fluff of 1 mm or more in terms of a fluff index of at least 300 pieces/10 m, A composite yarn comprising 60 to 85% by weight of the entire composite yarn, and further characterized in that the twisting direction of the composite yarn is the same as the twisting direction of the spun yarn. 2. The composite yarn according to claim 1, wherein the protein-based natural fiber is wool fiber. 3. The composite yarn according to claim 1 or 2, wherein the cellulosic natural fiber material is cotton fiber. 4. The composite yarn according to claim 1 or 2, wherein the cellulosic natural fiber material is hemp fiber.