JPS6022092B2 - Method for manufacturing composite bulky marbled yarn - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for manufacturing a composite bulky marbled yarn.

Generally, when obtaining a marbled yarn using long fibers, two or more types of long fibers with different dyeability are twisted together or first twisted, or given a grandchild to obtain a marbled yarn or three or more threads, or Alternatively, there is a method in which the yarn is subjected to an air-fluid treatment so that the yarn is entangled at 20 to 100 threads/skin to obtain a marbling effect.

However, striped fabric products made of long fibers have a monotonous appearance and texture, give a cold feel, and cannot achieve a spun-like texture. Moreover, the drizzle effect due to plied or plied yarns is uneven in twisting or yarn feeding ratio. The marbling effect is often disturbed due to fluctuations.

An object of the present invention is to provide a composite bulky marbled yarn having an excellent marbling effect and a spun-like appearance and texture, and another object of the present invention is to provide an industrially easy and inexpensive manufacturing method for such bulky yarn. There is something to do.

That is, in the present invention, an ionic dye beamable polyester drawn yarn and an undrawn polyethylene terephthalate yarn having a birefringence index of 35 x 10-3 to 150 x 10-3 are aligned and subjected to an air fluid treatment to produce a birefringence of 20 to 100. A method for producing a composite bulky marbled yarn is characterized in that after imparting Keno-m entanglement, false twisting is performed at an overfeed rate of 10 to 110%.

The drawn polyester yarn dyeable with ionic dyes as used in the present invention refers to copolyester polyesters containing ionic dye-carrying groups in the molecule, or polymers dyeable to ionic dyes such as polyamides and additives. In the present invention, the former (copolyester) is preferable, and it is particularly preferable that the beam-bearing group in the ionic dye is a sulfonate group.

Further, polyethylene terephthalate (hereinafter referred to as "PET") has a birefringence of 35 x 10-3 to 150 x 10-3.

) The undrawn yarn has a spinning speed of at least 2500/3000 when melt spinning PET.
~4000/ribs. The PET undrawn yarn thus obtained usually has a diameter of 35×10-3 to 75
It has a birefringence of about ×10-3. The other method is to use undrawn PET yarn with a birefringence of 9×10-3 to 10×10-2000, which was drawn at a lower speed than the former, at a drawing magnification of 1.
It is obtained by stretching at a ratio of 8 to 2.9. Such PE
T undrawn yarn is usually 75 x 10-3 to 150 x 10-3
It has a birefringence of about Z In the present invention, the polyester drawn yarn and the PET undrawn yarn as described above are aligned and subjected to an air fluid treatment to generate intertwining of 20 to 100 single yarns per person, and then an overfeed rate of -10
False twisting is performed at ~110%.
J For the air fluid treatment, a normal interlace/zzle may be used, and the number of entangled yarns can be adjusted by adjusting the overfeed rate and air pressure of the yarns supplied to the nozzle.

In the case of the present invention, for example, the overfeed rate is 20.2 to
2.0%, air pressure 1.5-5.0k9/20 for carp
~100 entangled yarns can be easily obtained. If the number of entanglements is too small, the loop fluff portion of the open weave becomes long, leading to a decrease in operability during weaving. On the other hand, if the number of interlaces is too large, the loop fluff part 2 of the open weave will be too short and will lack bulk, so the number of interlaces should be between 20 and 100 per skin, and 50 per skin. Preferably before and after.
Next, false twisting is performed using a normal false twisting device, but in the present invention, the overfeed ratio of the yarn is set to -1.
It is preferable to carry out the processing at a concentration of 0 to 10%.

As a false twisting device, a friction false twisting device is most suitable from the viewpoint of operability, but a spindle device also poses no problems in terms of operation and quality. The above air fluid treatment and false twisting process may be performed in a series of three steps or in separate steps. As shown in FIG. 1, the yarn obtained by the method of the present invention has entangled convergent portions 1 and open-woven portions 2 with loop fluff alternately formed in the yarn direction, and the open-woven portions are Ionic dye-beamable polyester drawn yarn is in the core, P
It has a two-layer structure in which the ET undrawn yarn is placed in the sheath.

Of course, the tenacity-elongation curve of such a yarn is, as shown in FIG. This clearly shows the characteristics of Furthermore, if the false-twisting heater temperature is lower than the softening temperature or melting temperature of the yarn, such yarn will have excellent bulk and a spun-like appearance and texture.
By adjusting the temporary lacquer heater temperature between the softening temperature and melting temperature of the yarn, the fibers that make up the yarn can be fused partially (intermittently in some cases) or the entire surface to create a linen-like texture with a crisp feel. It can be made to have a unique appearance and texture.

Spun-like yarns with a tangled texture like this, as well as hemp-like yarns where the fibers are partially or fully fused to each other, can be dyed appropriately to create marbled knitted fabrics with excellent uniformity. It's something you get.

The present invention will be specifically explained below using Examples.

Example 1 Sulfoisophthalic acid copolymerized PET drawn yarn (7
A flat ET undrawn yarn (13/38) with a birefringence index (△n) of 45 After intertwining 40 to 70 threads/skin, the interlaced yarn is fed to a spindle-type two-stage heater false twisting machine and subjected to false twisting under the conditions shown in Table 2 to create a composite bulky yarn. Processed yarn was obtained.

Next, the obtained composite bulky processed yarn was knitted into a circular knitted fabric, dyed blue with Sevron Blue, and the appearance and texture of the fabric was evaluated. It was the basis of the marbling theory.

Table 1 Table 2 Sulfisophthalic acid copolymerized PET yarn (5M/24f, cationic dye beam flexibility) and birefringence (△n) of 145×10
-3 PET undrawn yarns (62d/24f) were aligned and fed to the interlace nozzle under the conditions shown in Table 3.
After applying 0 to 70 pieces/skin entanglement, the same machine as in Example 1 (
However, the conditions are as shown in Table 4), and false twisting was performed to obtain a composite bulky textured yarn.

Next, the composite bulky processed yarn was dyed in the same manner as in Example 1,
When the appearance and texture were judged, the fabric had a linen-like crisp texture and a good marbled texture.

Table 3 Table 4

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the shape of the composite bulky yarn of the present invention,
FIG. 2 shows the strength-elongation curve of the composite bulky yarn of the present invention. Figure 1 Figure 2

Claims (1)

[Claims] 1. A drawn polyester yarn dyeable with an ionic dye and an undrawn polyethylene terephthalate yarn having a birefringence of 35 x 10^-^3 to 150 x 10^-^3 are aligned and subjected to air fluid treatment. 1. A method for producing a composite bulky marbled yarn, which comprises applying a false twisting process at an overfeed rate of -10 to +10% after imparting entanglement of 20 to 100 threads/m. 2. The method according to claim 1, wherein the drawn polyester yarn dyeable with an ionic dye is a copolyester containing a group dyeable with an ionic dye. 3. The method according to claim 2, wherein the group dyeable by ionic dyes is a sulfonate group.