JPH04108131A - Production of bulky yarn - Google Patents

Abstract

PURPOSE:To obtain bulky yarn suitable for woman dress material, having softness, a specific crispy feeling and special handle by forming core yarn comprising a core part of a water-soluble filament and a sheath part of wool yarn and dissolving the core part. CONSTITUTION:Core yarn comprising a core part of a water-soluble filament (preferably PVA) and a sheath part of wool yarn is formed and the core part is dissolved in water to give the objective bulky yarn.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention involves treating a core yarn consisting of a water-soluble filament core and a wool fiber sheath with water, dissolving the water-soluble filament, and using the remaining portion to form bulky yarn. Relating to a method of manufacturing.

(Prior art) A method for imparting bulkiness to spun yarn is to use one of the fiber materials that make up the yarn, one with a high shrinkage rate and the other with a low shrinkage rate, and then blend them together with the yarn. After that, a method is usually adopted in which a heat treatment is performed to develop bulkiness, and synthetic fibers such as polyester, acrylic, and nylon are often used as materials with a high shrinkage rate.

On the other hand, with wool fibers, there is a method of stretching wool fibers in moist heat to give them bulkiness, but this method is extremely difficult to implement because the shrinkage stress is small and the cost increases due to the increase in processing steps.

On the other hand, one method to develop Halky properties is coated composite yarn (
It may be possible to use a core yarn (core yarn), or it may be necessary to reduce the proportion of synthetic filaments in order to obtain the good feel of wool fibers, and such a core yarn will result in a yarn with few voids and inferior in softness. Moreover, it is difficult to completely cover the synthetic filaments with wool fibers, and the quality may deteriorate or deteriorate due to differences in gloss and dyeability between raw fibers in areas where the synthetic filaments appear on the surface of the yarn.

In order to avoid this, attempts have been made to use the same natural fiber as the core fiber, or yarn spun from the same material is used again as part of the core system, which increases production costs and limits the single fiber fineness of wool fibers. Therefore, it is difficult to spin a fine yarn, and if the yarn is completely covered, it will become a hard yarn, which will bypass the air false twisting method and the ring spinning method. The disadvantage is that when the center of the fabric is made into a fabric by tightening the essentially untwisted fibers, the texture becomes stiff.

(Problem to be solved by the invention) As described above, the use of highly shrinkable synthetic fibers to give bulky properties to yarn naturally has its limits in terms of hue and texture, and In addition, when using a core yarn with low fuzz and high added value, the constituent fibers become dense, resulting in a hard texture and lack of softness.

The present invention solves the above-mentioned problems with wool fiber-based bulky yarns obtained by conventional techniques, and
4, it is an object of the present invention to provide a method by which a single yarn having a novel texture and rich bulkiness can be manufactured at low cost.

(Means for Solving the Problems) The present invention has the following configuration to solve the above problems. That is, the method of producing bulky yarn comprises forming a core yarn consisting of a water-soluble filament core and a wool fiber sheath, and then dissolving the core in water.

In the above configuration, as the water-soluble filament, it is possible to use any filament that can be dissolved in room temperature water or hot water. Filament is most suitable, and the melting temperature is 60°C to 95°C.
Since the raw material for the sheath part is wool fiber, it is preferable to use a denier in the range of 28D to 56D and a number of constituent filaments in the range of 9 to 18.

- As the perpetual wool fiber, it is possible to use a worsted sliver obtained by hand-selecting the raw wool for worsting, which is obtained by passing through washing → cartogill → gill → combing → gill → gill to form a sliver for worsting.

The water-soluble filaments forming the core and the worsted sliver rovings forming the sheath are placed in a known core yarn manufacturing device to form a core yarn having a water-soluble filament as a core and a wool fiber as a sheath; As a manufacturing method, either a method using a ring spinning machine described in Japanese Patent Publication No. 4]-6308, or a method using an air false twisting spinning device described in Japanese Patent Publication No. 59-7812 is used. Can be used.

When the former method is used, a core yarn consisting of a core of water-soluble filaments and a sheath of at least one wool fiber roving surrounding the core helically is obtained; A core yarn comprising three layers: a first wool fiber layer with no twist substantially overlying the outer periphery of the core portion, and a second wool fiber layer with true twist surrounding the first wool fiber layer. The first wool fiber layer and the second wool fiber layer constitute a sheath portion.

The core yarn, which has water-soluble filaments in the core and wool fibers in the sheath, is treated with hot water so that the core dissolves and becomes bulky yarn. Taking water-soluble vinylon (trade name: Tsurubron, commercially available from Nichibi Co., Ltd.), which is a suitable core, as an example, water and temperature are applied to Fulblon to cause it to swell, shrink, dissolve, and disperse, and then be removed. The method of the present invention will be explained in more detail with reference to Examples below. The following examples show the case where an air false twisting type spinning device is used as the device for carrying out the method of the present invention.

(Example) A representative example of an air false twisting spinning device is the "Mushroom Sheet Spinner" (abbreviated as MJS) manufactured by Sokoku Kikai Seisakusho.The configuration of this device will be explained with reference to FIG.

The roving (2) pulled out from the can (1) is passed through a traft mechanism consisting of a pair of hack rollers (3), a pair of middle rollers (5) with an apron (4), and a pair of front rollers (6). The fleece-like material is sequentially passed through a first air injection nozzle (7), a defibrating tube (8), a second air injection nozzle (9), and a drawing roller (10) to become a single yarn (Y
) and wind it up as a package (11).

The spun single yarn (Y) constructed through this process has a structure different from that obtained by ring spinning, and has an outer layer wound around an inner layer fiber bundle that has virtually no real twist. The inner layer fibers are bundled together by the fibers, and one end of the single core fiber bundle of the stable fiber bundle is located in the inner layer of the produced yarn, and the other end of the core fiber bundle is exposed to the outer layer of the produced yarn and wound into a real twist. , each of the wound single fibers has a shape having an arrangement direction that is generally spaced apart.

Accordingly, the wool fibers used to obtain the core yarn of the present invention are transported from the second roller having a predetermined long fiber length to the top roller of the middle roller pair (5) of the trough mechanism (12) shown in FIG. A hollow roller with the structure shown in the figure (1
3) is specially adopted and configured to smoothly carry out the traft of each fiber of a specific length.

This hollow roller (13) is manufactured with a small diameter in the center area of the outer circumferential surface, so that the hollow part (13) has an appropriate depth.
4) is formed. When using the apron (4)
is adapted to rotate in contact with this hollow portion (14). The depth of the hollow portion (14) is selected depending on the weight of the unit length of the roving to be supplied, and for thick roving, it is desirable to have a depth (for example, the depth of the roving is Weight: 0.4~
2. In the case of Og/m, about 0.4 to 0.8 mm is appropriate. The function of this hollow roller (13) is limited when there are fibers in the roving that are longer than the roller cage set in the traft mechanism (this is not the case when using wool fibers specified in the present invention). (inevitably always), but without cutting it during the traft,
Moreover, it is necessary to control the troughs of other fiber groups so as not to disturb them.

The apparatus of this embodiment is implemented using an apparatus having the above-mentioned configuration, and the manufacturing process thereof will be explained below.

Average fiber diameter 21 manufactured through the normal process of worsted spinning
．． A worsted top with a unit weight of 25 g/m and a maximum fiber length of 1.80 mm and an average fiber length of 75 mm by the No. 1-he method was made into a sliver of 0.61 g/m in a pre-spinning process. This Slino 1- is passed through an MJS machine constructed as shown in FIG. 1, and at the same time, a filament (15) of water-soluble Hinilon is fed to a front roller (6) to form a core yarn consisting of both.

The front roller (6) may be a commonly used cylindrical roller or, in this method, the filament (15)
The elongation of the thread decreases as it is stretched in a stretched state. In order to avoid this, the front roller (6) for feeding the filament (15) has a groove with a depth of 1 to 2 mm, and the filament (5) is fed into the groove without being gripped by the roller, and the filament (5) is fed to the first air injection nozzle without being gripped. (7) is combined with the fiber bundle trafted by the draft mechanism (12).

The end of the groove is positioned about 2 m away from the end of the fiber bundle so as not to prevent the fiber bundle drafted by the raft mechanism (12) from being gripped by the front roller (6).

Water-soluble vinylon (15) has a dry strength of 3.5 to 4.5 g/d.
28D/9F with dry elongation 15-20% and melting point 36±4℃
, 40D/12F, and 56D/18F were used.

The core yarn count is 28D/9F and l/54 respectively.
．． 7th (meter), 40D/12F user is 1151
．． Number 0 (meter), use 56D/18F /
It was spun to a count of 46.8 (meters).

The count of the remaining wool after dissolving water-soluble Hinilon (15) was 1/66th (meter) in all cases, and those using thick water-soluble Hinilon had a larger yarn diameter, resulting in a smaller apparent density and a bulkier yarn. became.

In the air false twist spinning machine, the groove depth of the hollow roller (13) is 0.
．． The total trough was set to 6 mm, the total trough was set to 40.3 times, the air pressure of the first air injection nozzle (7) was set to 3 kg/cm2, and the air pressure of the second air injection nozzle (9) was set to 4 kg/cm2.

The core system of the water-soluble Hinilon and wool obtained in this example and the fiber quality of the wool in which the water-soluble Hinilon was dissolved are shown in Part-i. Table 2 shows the yarn quality spun with the front roller (6) (grooved roller example) and the normal front roller without grooves (both were spun from the same raw material). In addition, the single yarn strength and elongation in the table are JIS L 1095 7.5 single yarn elongation strength and elongation rate (distance between grips 50 cm, tensile speed 30 cm/min using constant speed tension type tester). . Although this embodiment has been explained for air false-twisting spinning, the same effect can be obtained for core yarn using ring spinning as shown in Table 2 (Effects of the Invention). By making the filament water-soluble, it is possible to solve the disadvantage of the yarn being hard and lacking in bulk, and to make it a soft yarn.

Furthermore, the yarn produced by the air false-twisting method, which is a type of core yarn, has a unique crispness, giving it a unique texture that has never been seen before, and this unique texture is suitable for use in women's clothing fabrics.

In the above example, it was explained that the core was dissolved in hot water treatment in the form of spun yarn, or that the strength of the yarn was increased during the weaving process by weaving while retaining the core filament material. Strong holding and good spinnability,
By making the thread usable and dissolving the water-soluble fibers after weaving, it is possible to make a bulky fabric with voids in the thread.

In order to increase the binding power of the paternal line and further improve the weaving properties, it is possible to make the sizing process by simply passing the spun yarn containing water-soluble filaments into warm water, which simplifies the sizing process by eliminating the need to manage the sizing liquid. It will be done. This is 1989 7 of the Textile Machinery Society Journal.
Monthly Issue, P335-340 Is there any research report on using it as a twisted yarn in "warp sizing using water-soluble vinylon filaments"?In the present invention, by using core yarn, it is possible to impart bulkiness at the same time as sizing. The effect is enormous.

[Brief explanation of drawings]

Fig. 2 is a side view showing an example of an apparatus for carrying out the method of the present invention, Fig. 2 is a perspective view showing the main parts of the apparatus, Fig. 3 is a plan view showing the shape of the hollow roller, and Fig. 4 is FIG. 3 is a plan view showing the shape of a front roller. (1)...Cans, (2)...Roving, (3)
・Hack roller pair, (4) ・・Apron (5)・Middle roller pair, (6) ・=Front roller pair, (7)
...First air swirling nozzle (8)...Defibration tube, (9)...Second air swirling nozzle (10)...Drawing roller, (11)...Puff cane, (12)... Traft mechanism, (13) Hollow roller, (14) Hollow roller, (15) Filament. 1990 Patent Application No. 223051 Address 5-17-4 Sumida, Sumida-ku, Tokyo Name (095
) Kanebo Co., Ltd. 7, Contents of the amendment (1) On page 6, line 1 of the specification, the word "Fulbron" is amended to read "Tsurubron". (2) “Filament (5)” on page 9, line 8 of the specification box.
Correct the statement to "filament Cω". (3) In the 14th line of page 15 of the specification box, the text ``hollow roller J'' is corrected to ``hollow portion.'' Kanebo Co., Ltd. 2 Patent Department, 5-90 I-chome, Tomobuchi-cho, Bejima-ku, Osaka 534

Claims (1)

[Claims] A method for producing bulky yarn, which comprises forming a core yarn consisting of a water-soluble filament core and a wool fiber sheath, and then dissolving the core in water.