JPS60139843A - Production of spun like composite yarn - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a spunlike composite yarn in which a thermoplastic synthetic fiber multifilament and a regenerated fiber fiber multifilament are entangled with each other, and loops and cut fluffs coexist.

Conventionally, as a processing method for composite processed yarn of thermoplastic synthetic fiber multifilament yarn (hereinafter referred to as thermoplastic multifilament yarn) and recycled cellulose fiber multifilament yarn (hereinafter referred to as recycled fiber multifilament yarn),
Many methods are known, such as combining and twisting plastic multifilament yarn and recycled fiber multifilament yarn, relaxing heat treatment after combining and twisting, and false twisting at the same time as pulling. In this case, there is almost no entanglement between the single filaments of the thermoplastic multifilament yarn and the recycled fiber multifilament yarn, and both yarns are separated from each other and form groups. Therefore, in woven or knitted products using yarns obtained by these conventional techniques, the characteristics of both yarns simply appear, the texture and heathered tone are slightly different, and on the contrary, there is a tendency to mix. It has the disadvantage of being prone to heather spots, streaks, and steps due to its poor quality.

Composite yarns that are fluid-treated by combining thermoplastic multifilament yarns and recycled fiber multifilament yarns have also been proposed. It is roughly divided into taslan quipe, which has many loops on the yarn surface, and (al
The reality is that the O type cannot provide a feeling of volume, and the Tb) type cannot provide a good drape. In other words, the functionality and drape properties of thermoplastic multifilament yarn and recycled fiber multifilament yarn may be diminished by loops and entanglements, resulting in poor texture and performance in woven and knitted products. There are many cases where there are restrictions on the usage. Furthermore, in the case of the Taslan Eve composite yarn shown in (b), many loops and slacks made of thermoplastic multifilaments occur throughout the yarn, and they are tightly intertwined to form a sturdy form, resulting in a supple texture. It is difficult to obtain knitted products, and there are many loops on the surface of the product, so when the surfaces of the product come into contact, the loops get caught, causing the so-called zipper phenomenon, which causes problems such as when being worn. It has the disadvantage that it tends to cause discomfort.

In addition, as a method for improving these, a method has been proposed in which a low tenacity yarn and a high tenacity yarn are subjected to fluid treatment, the low tenacity yarn is cut, and loops and cut fuzz are mixed in the yarn. However, because the strength of the supply system itself is low,
When the yarn travels along the yarn path before entering the fluid treatment area, the filament is likely to break, resulting in poor processability and a lack of stability in the quality of the resulting yarn. .

In view of the above-mentioned current situation, and as a result of various studies, the inventors of the present invention have developed a method for producing regenerated fiber multifilament yarns by wet-processing them in a fluid treatment zone using ordinary recycled fiber multifilament yarns and thermoplastic multifilament yarns. We have discovered that single filaments can be partially cut scales extremely efficiently, and have arrived at the present invention.

That is, the present invention combines a thermoplastic synthetic fiber multifilament yarn (yarn A) and a regenerated cellulose fiber multifilament yarn (yarn B) and performs fluid treatment to form a large number of loops on the yarn surface. , As the yarn A and the yarn B, yarns satisfying the conditions of the following formulas (1) to (4) are stoned, and the yarn B is moistened in a fluid treatment zone to partially cut the single filament. This is a method for producing spun-like composite yarn.

AW--BW≧1.5...(1), BW≦1.5...
・(2) BD≧1.7;...(3), BW/BD≦0.
6...(4) However, AW: Wet knot strength of yarn A (
g/d) BW: Wet knot strength of yarn B (g/d) BD
: Knot strength of yarn B in standard state (g/d) The present invention will be described in detail below.゛As shown in the process explanatory diagram of an embodiment of the present invention in Fig. The regenerated fiber multifilament yarn (yarn B), which has been sent out from the other yarn (1) at the same supercharging rate and made wet by the heating device (2), is drawn into a fluid □ The fluid is supplied to the injection nozzle (3), and the fluid is supplied to the injection nozzle (3).
) causes the filaments of yarn A and yarn B to intertwine with each other, forming many loops and slacks, and at the same time, the single filament of yarn B, whose strength has decreased in the wet state, A composite yarn Y1 having a large number of loops, slacks, and cut fuzz is obtained by randomly cutting it by the force of □ such as tension and twisting caused by the disturbed body.
It is taken up by a taking-off roller (4).

Fig. 2 is a process explanatory diagram of another embodiment in which yarn A and yarn B are fed at different supercharging rates, and yarn A is fed by supplying rollers (from 6 to On the other hand, the yarn B is sent out to the supply roller (1) at a constant supercharging rate that is higher than the supercharging rate of the supply roller chain to make the heating device (2) more moist. Yarn A and yarn B in a wet state are combined and supplied to the fluid jet nozzle (3), and the jetted fluid type □disturbing action'' forms many loops and slacks in the yarn, and at the same time increases the strength in the wet state. The degraded single filament of yarn B is partially cut to form cut fuzz □,
The composite yarn Y2 is taken off by a take-up roller (4). The composite yarn Y2 obtained in this case is a composite yarn with a core-sheath two-layer structure in which the yarn A with a small supercharging rate mainly forms the inner layer part and the yarn B with a high supercharging rate forms the outer layer part. . As described above, composite yarns with various appearances and properties can be obtained by making the supercharging rates of yarn A and yarn B the same or giving them an appropriate difference.

As described above, one of the characteristics of the method of the present invention is that the yarn B, which is supplied together with the yarn A to the fluid jet nozzle and is agitated with the jet fluid, is wetted in the fluid treatment zone. This fluid treatment zone means the area between the supply roller and the take-up roller, and the locations where the wetting treatment is performed include, in addition to the area between the supply roller and the fluid jet nozzle illustrated in FIGS. 1 and 2, This can be carried out inside the fluid jet nozzle, at the yarn inlet or yarn outlet, or the like. Further, the wet treatment may be applied to both yarn A and yarn B, or to either one of them. For example, even if the yarn A of the thermoplastic multifilament yarn is subjected to a wetting process using a heating device installed between the supply roller and the fluid jet nozzle as shown in the figure, the water attached to the yarn A inside the fluid jet nozzle A part of the yarn is transferred to yarn B, and the purpose is fully achieved. In short, it is sufficient that the yarn B feels wet when subjected to the disturbance action by the jetted fluid.

Next, yarn A, which is a thermoplastic multifilament yarn made of polyester, polyamide, etc., and yarn B, which is a recycled fiber multifilament yarn, which are used in the method of the present invention, are yarns whose knot strength has the following relationship. have to choose. The method for measuring the nodule strength is JIS-L1.
Compliant with 070.

i) The difference between the wet knot strength AW of yarn A and the wet knot strength BW of yarn B must be 1.5 g/d or more. If this strength difference is less than 1.5 g/d, the fluid treatment tends to cause both yarns A and B to be cut to the same degree, or both yarns A and B are likely not to be cut. Setting fluid treatment conditions is extremely difficult.

ii) It is necessary that the wet knot strength BW of the yarn B is 1.5 g/d or less; if it is stronger than 1.5 g/d, the single filament will be difficult to break during the jet fluid disturbance treatment, and the cut fluff will be Variations in length and number of fluff are likely to occur.

iii) Knot strength BD of yarn B in standard state is 1.7 g
/d or more, and the wet/dry nodule strength ratio BW/BD must be 0.6 or less. Outside these conditions, troubles such as single filament breakage before the fluid treatment zone are likely to occur, and it is difficult to obtain good results. Since the fluff of the composite yarn itself has low strength, problems such as poor morphological stability occur.

In the method of the present invention, fluid treatment can be achieved using conventionally known fluid injection nozzles that form a number of loops or slacks in the multifilament yarn by the agitating action of the ejected fluid. In addition to the above-mentioned strength conditions, the formation of loops and slack and the degree of cutting of the single filament of yarn B due to fluid treatment are determined by the characteristics such as the fineness and Young's modulus of each yarn, the supercharging rate, the jetting fluid pressure, etc. can be arbitrarily set by selecting various conditions.

As described above, the method of the present invention uses yarn A of thermoplastic multifilament yarn, which has relatively high strength in a standard state, and a
The regenerated fiber multifilament yarn yarn B, which undergoes a predetermined strength reduction due to moisture, is combined with the yarn B and supplied to the fluid treatment zone, and the yarn B is wetted and subjected to fluid treatment to form a large number of loops and slacks. This method involves partially cutting a single filament of yarn B to form cut fluff, and skillfully utilizes the strength decreasing behavior of yarn B under wet conditions and the elongation and twisting of the filament due to the disturbance effect of the jetted fluid. It is something. Therefore, troubles such as filament breakage do not occur during the process before entering the fluid treatment zone.
Processing is possible at high speeds, and since it is a wet fluid treatment, the entangling effect and loop forming effect of both yarns can be greatly improved, and composite yarns with stable quality can be efficiently manufactured. I can do it.

In addition, the composite yarn obtained by the method of the present invention has the advantage that some of the filaments constituting it are recycled fiber filaments with excellent heat-supplying properties and drapability, and the filaments are randomly cut. When used in woven or knitted fabrics, an excellent product can be obtained that not only has the texture and appearance of spun yarn, but also has a supple touch and soft texture. On the other hand, thermoplastic multifilament forms loops and slacks, and is intertwined with the recycled fiber multifilament that becomes cut fuzz, so the original tension, stiffness and bulkiness are not excessively exhibited, and the recycled fiber multifilament The drapability of the filament and the spun light control touch created by cutting the fluff are in perfect harmony.

Furthermore, because there is a difference in dyeability between the thermoplastic multifilament yarn and the recycled fiber multifilament yarn, a heathered product is obtained; , Its heather is fine. The recycled fiber filament exhibits no pilling when cut, and since the thermoplastic filament forms a loop that is resistant to pilling, the product has extremely excellent anti-pilling properties.

Next, examples of the present invention will be described.

Example 1 Polyester multifilament yarn 75d/48f (knot strength in standard state 4.2 g/d, knot strength at ai%!1 4.2 g/d) FTC yarn A, viscose rayon multifilament yarn 75d /30f (knot strength in standard state 1.9 g/d, nodule strength in wet state 1.
0g/d) as yarn B, the processing steps shown in Figure 1 were carried out under the conditions of a supercharging rate of 10%, a fluid injection nozzle end pressure of 6.5 kg/ci, and a take-up speed of 300 m/min. Processing was performed. As a result, a composite yarn was obtained in which many cut fluffs of viscose rayon filaments and loop fluffs of polyester filaments were generated on the surface of the yarn, and all the filaments were entangled with each other to form a single body. When this composite yarn was used to make a woven or knitted fabric and subjected to a conventional dyeing finish, a heathered product with fine heathering was obtained that had excellent tension, drape properties, and a warm, voluminous feel. . Furthermore, regarding this product, JIS-IJO761CI
When the pilling prevention performance was evaluated by method (10 hours), it was grade 5, showing excellent pilling prevention performance.

Example 2 Polyester multifilament yarn 100d/48r (
Nodule strength under standard conditions: 4.0 g/d, nodule strength under wet conditions: 4
．． 0g/d) Yarn A is yarn A, and viscose rayon multifilament yarn 75d/30f (knot strength in standard state 1.9 g/d, knot strength in wet condition 1.0 g/d) is yarn B, as shown in Figure 2. Processing was carried out under the following conditions: a supercharging rate of 15% for yarn A, a 30% supercharging rate for yarn B, a fluid injection nozzle end pressure of 8 kg/cJ, and a take-up speed of 270 m/min. The resulting composite yarn has a large number of polyester filaments densely packed in the core to form loops and slacks, and the filaments are tightly intertwined with each other, and in the sheath, the cut fuzz of the viscose rayon filament covers the composite yarn. It was formed into a countless number of shapes, giving it a wool-like appearance. When a woven or knitted fabric was produced using this composite yarn by a conventional method, a product with a woolen touch and drapability and a warm marbled texture was obtained.

[Brief explanation of drawings]

FIG. 1 is a process explanatory diagram of one embodiment of the method of the present invention, and FIG. 2 is a process explanatory diagram of another embodiment. (11, (fl... supply roller, (2)... temperature supply device, (3)... fluid injection nozzle, (4)... take-up roller, Yl, Y2... compound yarn patent application Person Unitika Co., Ltd. Agent Patent Attorney Colophon Shigeki Diagram 1 Procedural Amendment (March 6, 1980 To the Commissioner of the Patent Office 1, Indication of the case 1982 Patent Application No. 247838 2, Name of the invention Spanlike) Composite yarn manufacturing method 3, relationship with the case of the person making the amendment Patent applicant address 1-50 Higashihonmachi, Amagasaki City, Hyogo Prefecture Name (45)
0) Representative Director of Unitika Co., Ltd. 1991) Yutaka 4, Agent address: 5th floor, Taiyo Building, 2-16 Awajicho, Higashi-ku, Osaka, Osaka Prefecture (■541) (11 Specifications, Claims column (2) Column 6 of Detailed Description of the Invention of the Book, Contents of Amendment (1) The claims of the specification are amended as shown in the attached sheet. (2) rAW-BW≧1 on page 5, line 8 of the specification. 5.
...il+," rAW-BW≧1.5...(1),
” he corrected. Claims (1) Thermoplastic synthetic fiber multifilament yarn (yarn A
) and recycled cellulose fiber multifilament yarn (yarn B) are combined and subjected to fluid treatment to form a large number of loops on the yarn surface.
Using a yarn that satisfies the conditions of formulas 1 to (4), and yarn B
A method for producing a spunlike composite yarn, characterized in that the single filament is partially cut by wetting the yarn in a fluid treatment zone.
．． 5...(2) BD≧1.7...(3), BW/B
D≦0.6...(4) However, AW: Wet knot strength of yarn A (g/d) BW: Wet knot strength of yarn B (g/d)
/ d) BD: Standard knot strength of thread B (g/d)

Claims (1)

[Claims] (1) Thermoplastic synthetic fiber multifilament yarn (Yarn A
) and recycled cellulose fiber multifilament yarn (yarn B) are combined and subjected to fluid treatment to form a large number of loops on the yarn surface.
A yarn satisfying the conditions of formulas 1 to (4) is used, and the yarn β
the monofilament by wetting it in the fluid treatment zone,
A method for producing a spunlike composite yarn characterized by partially cutting the yarn. AW-BW≧1.5...(11, BW≦1.5...
(2) BD≧1.7...(3), BW/BD≦0.6
...(4) However, AW: Wet knot strength of yarn A (g
, /d) BW: Wet knot strength of yarn B (g/d) BD
: Knot strength of yarn B in standard state (g/d)