JPS6160170B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention provides a method for producing bulky spun yarn, more specifically,
This invention relates to a method for producing bulky spun yarn useful as interior materials for carpets, seats, mats, etc. Conventionally, crimping of fabrics made of synthetic fibers was achieved by a so-called mechanical pressing method in which thick tow-shaped fiber bundles were densely packed into a pressing chamber using a pair of rollers, and each fiber was buckled or bent. . Therefore, the crimping form is a two-dimensional zigzag form, and heat setting is performed in the form of thick fiber bundles, which makes it difficult to apply sufficient heat to each fiber, resulting in poor bulk and poor dyeing finishes. It had drawbacks such as being easily susceptible to the heat received in subsequent processes. For this reason, it has been difficult for conventional spun yarns using such fabrics to have high bulk and thermal fastness, making it difficult to apply them to interior design fields that require such properties. The purpose of the present invention is to improve such drawbacks and to permanently improve
An object of the present invention is to provide an interior material made of synthetic fibers that is flexible and has excellent bulkiness. Furthermore,
Another object of the present invention is to provide a more streamlined and labor-saving manufacturing method for the material manufacturing process. In the course of various studies aimed at achieving the above object, the inventors of the present invention focused on the high-speed processability of fluid-pushing nozzles and their crimp mechanism, which have been attracting attention in recent years, and as a result of further studies, they arrived at the present invention. be. That is, according to the present invention, a thermoplastic multifilament yarn is introduced into a heated fluid nozzle that applies crimps while pushing the yarn into a retained state to form a crimped yarn, and then one or more of these crimped yarns are A method for producing a bulky spun yarn is provided, which comprises pulling the tow-like material together, cutting the tow-like material into slivers, and tying the slivers together. Furthermore, in this invention, since the above-mentioned fluid nozzle is capable of processing thick denier yarn at a speed of 1200 to 3500 m/min or more, it is possible to directly connect it to the spinning process or drawing process. Moreover, it is based on the idea that a tow-like material can be easily obtained by pulling and aligning it after processing, and that this is to be cut and bound. At this time, in the present invention, since the crimping process is performed in the form of yarn, sufficient heat can be applied to each single fiber, and since the crimping process is performed in the air, the crimped form becomes three-dimensionally random, resulting in high bulkiness and robustness. The aim is to reflect the advantages of being able to obtain crimped and spun yarn in the spun yarn. Of course, there is a crimping method that has the same performance as the fluid nozzle described above, for example, a crimping method in which a thermoplastic multifilament of synthetic fiber is collided with an air-permeable wire mesh using a fluid nozzle. The crimping method and the like are also applicable to the crimping step of the present invention. The present invention will be explained below with reference to the accompanying drawings.
In the figure, a filament yarn 2 spun from a spinning cap 1 is oiled by an oiling roller 3, then taken up by a take-up roller system 4, then stretched by a pair of heated Nelson roller systems 5, preheated, and then heated. It is introduced into the fluid processing nozzle 6, becomes a crimped yarn 7, and is deposited in a can 8. A large number of these cans are lined up as shown in FIG. The sliver is cut by a cutter 13 installed between the sliver 12 and the sliver 16 through a gill 14 and a take-up roller system 15.
and is housed in can 17. As shown in FIG. 3, the sliver 16 is passed through a guide 18, subjected to preliminary drafting of several tens of percent between a supply roller system 19 and a take-off roller system 20, and then drafted by a draft roller system 21. be done. When the sliver 16 leaves the draft roller 21, it passes through a fluid jet nozzle 22 which has the action of taking up and focusing the yarn, and is bound by a binding nozzle 23, after which it passes through a winding roller system 24, guides 25, 26, and the bobbin 2.
7 as a bulky spun yarn 28. The above example particularly shows an example in which the spinning process and the crimping process using a heated fluid nozzle are directly connected, but this embodiment includes the following. (a) The SDTY method (Spin
−Draw−Textured−Yarn). Here, the introduction speed to the fluid nozzle is 1200 m/
If it is less than 300 m/min, the spinning speed becomes 300 m/min or less because the stretching ratio is 3 to 4 times, which makes spinning unstable and is also unfavorable from the viewpoint of productivity. (b) STY method (Spin-
Textured-Yarn). If the spinning speed is less than 3500 m/min, the elongation of the filament yarn will be more than 70% and the strength will be about 2.5 g/de, which is not preferred in practice. (c) In the method of (b), the Nelson roller system is omitted and the take-up roller system 4 is installed as close to the spinning cap as possible, so that the discharged yarn is not cooled yet (in other words, the preheating effect on the nozzle is The STY method introduces it into the nozzle while maintaining the same temperature. In particular, this method (c) is the most advantageous method since it does not require any special preheating means, considering that preheating of the yarn in front of the nozzle is essential. Furthermore, in some cases it is not necessary to heat the fluid supplied to the nozzle either. The heated fluid nozzle used here is Maru〓〓〓〓
It is advantageous to use an air forcing device with a heated fluid injection section for sufficiently thermoplasticizing and propelling the typhoid filament yarn, followed by a pushing reservoir and also a cooling section. Examples of these are JP-A-51-34018, JP-A-50-33176, JP-A-49-41659, JP-A-49-41659, JP-A-50-123962, and JP-A-Sho. This is disclosed in JP-A No. 49-27651, Japanese Unexamined Patent Publication No. 47-25450, and the like. Here, the form of the crimped yarn taken out from the heated fluid nozzle is preferably in the form of a lump of crimped yarn retained in the push-in retention section, which makes it easy to store and take out the can. Additionally, since no winding device is required, processing speeds can be greatly increased. In addition, in processing using such a nozzle, the temperature of the heating fluid is such that the thermal contraction of the yarn during processing is preferably at least 10% or more.
It is preferable to adopt a temperature such that ~25%. This temperature itself varies depending on the processing speed, but it ranges from (melting point -40℃) to (melting point +100℃) of filament yarn.
and the yarn is at least 170℃
It is preferable to heat to a temperature higher than that. Further, it is preferable to use a heated fluid ejecting section having a shape and size that has good opening properties and does not cause interlacing between filaments in order to facilitate drafting of the sliver in a subsequent process. A large number of the thus obtained crimped yarns are pulled together and made into a tow-like product as shown in FIG. 2. In this case, the tow denier, crimped yarn denier
The single fiber denier etc. may be selected in relation to the spun yarn that is the final product. Next, the tow-like object is cut, but unlike conventional tow-like objects, the tow-like object itself is crimped in advance, so excessive stretching and tension cutting that eliminates the crimps is not possible. This should be avoided, and a push-cut type device in the tow spinning method, which converts the tow into sliver at once, is usually advantageously employed. The cut length of the sliver varies depending on the binding means used in the binding process, and when using ordinary roving or fine spinning, it is naturally necessary to match the size of the draft portion. On the other hand, when using a binding means that does not involve actual twisting using a fluid, the cut length should be long in order to improve the binding property, and usually about 150 to 400 mm is appropriate. In addition, instead of the sliver manufacturing process shown in Fig. 2, crimped yarn or a tow-like product made by aligning a large number of crimped yarns can be immediately cut into short fibers, which can be used for card, gill, roving, or It is also possible to adopt a method of spinning yarn into yarn through a spinning process, but this is not economically advantageous. In any case, a more suitable method may be adopted depending on the purpose of use. The sliver is then turned into a spun yarn in a binding step, and the binding means include (a) twisting by ordinary roving or fine spinning, (b) taslan treatment, (c) interlacing treatment, (d) treatment with a fluid false twisting nozzle, etc. will be adopted. In the case of (a), a product with an appearance similar to ordinary spun yarn but with high bulkiness is obtained, and in the case of (b), a fluffy yarn with protruding fluff ends, loops, and slacks is obtained, resulting in a fluffy yarn with a texture and texture. It also became a hobby,
In addition, in case (c), a product with intermediate characteristics between (a) and (b), that is, a yarn with more fuzz than twisted yarn and more open parts than Taslan, is obtained, and in case of (d), depending on the conditions, it has an alternately twisted yarn shape. This results in a product in which a large number of fibers and fluff are twisted in the direction opposite to the twisting direction of the fluid. Among these, (b), (c), and (d) are more economical than (a) because the processing speed is higher, but they tend to be slightly inferior in terms of uniformity and bulkiness of the spun yarn. In carrying out the present invention, instead of applying individual crimps to the same kind of filament yarn and then pulling them together, filament yarns having different dyeability and dyeability, or different types of filament yarns, irregular shapes, and different deniers are used. Alternatively, it is advantageous to individually crimp filament yarns having different physical and thermal properties and then pull them together to form a tow-like product. In other words, since a more decorative material is required as an interior material, it is desirable to have different colors, multiple colors, and varying luster than spun yarn made of a single component filament. Examples of these include regular polyester filament yarn and polyester filament yarn that is easily dyed with cationic dyes, regular polyamide filament yarn and deep dyeable polyamide filament yarn, polyamide filament yarn that is easily dyed with cationic dyes, and spun-dyed polypropylene filaments in several colors. Combinations of yarns, etc. may be used, and among these, the denier, cross section, and gloss may be varied. Furthermore, even the same type of filament yarn can be dyed in various colors after being crimped, and multicolored can be obtained by aligning the yarn. As described above, according to the present invention, it is possible to process a relatively thick denier yarn, and it is possible to provide strong crimp to each filament, and also to enable high-speed processing of 1200 to 3500 m/min or higher. Adopt shrinking method〓〓〓〓
Not only can it be directly connected to the spinning and drawing processes to obtain crimped yarn at a lower cost, but also
This provides an interior material that has permanent bulk, swelling, and decorative elements such as unique colors and multicolors. Example 1 Poly-ε-capramide with [η] = 1.3 with the number of holes
Output amount from 136 caps: 583g/min, spinning speed
It was spun at 676 m/min, then stretched 3.7 times, and preheated to 200°C with a preheating roller.
The fluid was continuously supplied to a heated fluid nozzle (fluid temperature: 260 DEG C.) at a speed of 2500 m/min as shown in Japanese Patent No. 50-33176 to create a crimp, which was then collected in a can.
The properties of the obtained crimped yarn were as follows. (a) Total denier 2560De (b) Number of filaments 136 (c) Total crimp rate 13% (d) Filament crimp form
Three-dimensional random bending crimp (e) Number of crimp threads on filament 11 pcs/inch (f) Boiling water shrinkage rate 3% (g) Strength 3.2 g/de (ch) Elongation 55% Next, these cans were The crimped yarns were taken out from each yarn and combined to form a tow-like product with a total denier of 384,000 De, which was then cut to a length of 300 mm (partially cut to 150 mm for the twist binding process) using a converter method. , thickness 128,000 De
drafted into a sliver of This sliver is further passed through a gill process to reduce its thickness.
The draft was carried out until it reached 45,000 De, and each of these was subjected to the following conjugation process to obtain a 6th (m) number spun yarn. Of these, only the sliver for the twisting process was stretched to a denier of 12,000 De due to draft magnification. The results are shown in Table 1.

[Table] 〓〓〓〓

[Table] Next, line up three of each of these spun yarns and
120 ^S T/M is twisted, then the twist is fixed with steam at 120°C for 30 minutes, and then tufted onto a polypropylene base fabric (Saxony).
As a result of trial production, all of the fabrics were found to be bulkier and have a better texture than fabrics made using conventional fabrics. Example 2 Poly-ε- easily dyeable with cationic dye with [η]=1.1
Capramide was spun from a cap with 136 holes and crimped in the same manner as in Example 1. The properties of the obtained crimped yarn were as follows. (a) Total denier 2600 (b) Number of filaments 136 (c) Total crimp rate 12% (d) Filament crimp form
Three-dimensional random bending crimp (e) Number of crimp threads on filament: 10 pcs/inch (f) Boiling water shrinkage rate: 3.3% (g) Strength: 2.9 g/de (ch) Elongation: 60% Next, the can of the above crimped yarn Prepare 60 crimped yarn cans and 90 cans of the crimped yarn obtained in Example 1, and combine the yarns pulled out from each can so that they are evenly mixed to form a tow with a total denier of 386,000 De. From this, a spun yarn was obtained in the same manner as in Example 1, twisted and tufted, and the carpet was dyed yellow and green with a mixed dye of an acid dye and a cationic dye.As a result, a carpet with good bulk and decorative properties was obtained. Obtained.

[Brief explanation of the drawing]

FIG. 1 is a process diagram for manufacturing a crimped yarn according to the present invention, and shows an example in which spinning, stretching, preheating, and crimping are performed continuously. FIG. 2 is a process diagram for manufacturing sliver from crimped yarn, and FIG. 3 is a process diagram for manufacturing spun yarn from sliver using a fluid nozzle. DESCRIPTION OF SYMBOLS 1...Spinning cap, 2...Spun filament yarn, 3...Oiling roller, 4...Take-off roller system, 5...Nelson roller system, 6...Heating fluid processing nozzle, 7...Crimped yarn, 8 ...Kens,
9... Slab removal nozzle, 10... Tow-like material, 1
1... Supply roller system, 12... Intermediate roller system, 13... Cutter, 14... Gill, 15...
Take-up roller system, 16...Sliver, 17...
18... Guide, 19... Supply roller system, 20... Take-up roller system, 21... Draft roller system, 22... Fluid jet nozzle, 23
... Conjugation nozzle, 24 ... Take-up roller system, 2
5, 26...Guide, 27...Bobbin. 〓〓〓〓

Claims (1)

[Scope of Claims] 1 A thermoplastic multifilament yarn is introduced into a fluid nozzle that crimps the yarn to form a crimped yarn having three-dimensional random crimps, and then this yarn is crimped singly or in multiples. A method for producing a bulky spun yarn, which is characterized by cutting a tow-like material made of aligned books into slivers, and conjugating the slivers. 2. The method for producing a bulky spun yarn according to claim 1, wherein the fluid nozzle that crimps the yarn is a heated fluid nozzle (air-pushing nozzle) that crimps the yarn while being pushed and retained. . 3 The manufacturing process of crimped yarn is SDTY (Spin-Draw-Textured-
Yarn) method, and the speed of supplying the yarn to the fluid nozzle is 1200 m/min or more.
A method for producing a bulky spun yarn according to item 1 or 2. 4 S, T, Y, (Spin-Textured-
3. The method for producing a bulky spun yarn according to claim 1 or 2, wherein the method is a method of manufacturing a bulky spun yarn, and the spinning speed is 3500 m/min or more. 5. The method for producing a bulky spun yarn according to claim 4, wherein the high speed spun yarn is introduced into a crimping fluid nozzle in an uncooled state. 6. The method for producing a bulky spun yarn according to claim 1, wherein the cutting means is a push-cutting method that does not cause elongation or settling of the crimp. 7. The method for producing a bulky spun yarn according to claim 1, wherein the binding means is a twisted yarn. 8. The method for producing a bulky spun yarn according to claim 1, wherein the binding means is taslan, interlacing, or alternately twisting means. 9. The method for producing a bulky spun yarn according to claim 1, wherein the binding means is a winding structure imparting means using a circulating air jet flow.