JPH0146615B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a novel savory-tasting material.

Conventionally, when obtaining cool materials for summer wear, it has been done to give a smooth feel by strongly twisting the yarn or fusing the yarn, but the former is expensive and the latter has a poor texture. It has drawbacks such as being hard.

An object of the present invention is to eliminate the drawbacks of the above-mentioned methods and to provide a method for producing a crunchy material at low cost and with excellent texture.

According to the present invention, the above object is achieved by relaxing polyester undrawn yarn and semi-drawn yarn (partially drawn yarn) after composite drawing so that the former is relatively located on the yarn surface and the latter is relatively located in the core. This is achieved by making a bulky composite filament yarn and then heat-treating it at a high temperature of 180°C or higher.

To explain the present invention in more detail with reference to the accompanying drawings, FIG. 1 shows a specific embodiment of the present invention, in which 1 is an undrawn polyester yarn spun at, for example, 1000 m/min, and 2 is a for example
It is a polyester semi-drawn yarn (so-called partially drawn yarn: POY) spun at 3000 m/min. These are first entangled with the air entanglement nozzle 3, then heated to 120°C with a hot roller 4, further heated to 160°C with a plate heater 5, and stretched 1.8 times between the roller 4 and the stretching roller 6. It is then relaxed in front of the take-off roller 8. In this case, the semi-drawn yarn 2
However, since this stretching ratio is sufficient, the yarn is sufficiently stretched (in other words, it is pulled very strongly), and the yarn leaving the stretching roller 6 returns some of the stretched amount due to elastic recovery. This stretching ratio is not sufficient for the undrawn yarn 1 (it is stretched to 3.2 times to become a normal yarn) and is still in the plastic deformation region, so the yarn that leaves the roller 6 almost returns to its original state due to elastic recovery. Things won't go back. As a result, the yarn exiting the roller 6 is pre-entangled by the air entanglement nozzle 3, and as shown in FIG. 2, the stretched yarn 2' of the semi-drawn yarn 2 shrinks due to elastic recovery. The stretched thread 1' becomes loose and bulky.

However, in such drawing, the semi-drawn yarn 2
is sufficiently drawn, so the degree of molecular orientation of the drawn yarn 2' is high, but this stretching ratio is not sufficient compared to the undrawn yarn 1, so the degree of molecular orientation of the drawn yarn 1' is low. (that is, the fusion temperature is low).

Therefore, this thread is then heated to 200 mm using plate heater 7.
When heated to around 10°C, the threads 1', which have a particularly low degree of orientation, harden or fuse due to the heating, and develop a crispy taste. Moreover, since the yarn structure is bulky before heat treatment, the yarn as a whole has less hardness than conventional fused yarns. In addition, generally, when the yarn is hardened by heat treatment, the strength decreases significantly, but in the case of the present invention, since the yarn 2' is oriented, the decrease in strength of this side is less, and therefore it supports the strength, so it is not practical. The above problem will disappear. Since the outer yarn 1' has a low orientation, heating weakens the yarn and improves pilling resistance.

FIG. 3 shows another embodiment of the present invention, in which the undrawn yarn 1 and the semi-drawn yarn 2 are not intertwined in advance as in the previous example, and the nozzle 10
When the threads are tied together, a thread structure with bulky unevenness is obtained as shown in Fig. 4. When this is heat-treated using the plate heater 7 as in the previous example, a yarn with a fancy and silky texture is obtained.

The materials used in these examples require one side to be undrawn polyester yarn, which is generally
A spinning speed of 2000 m/min or less is suitable. In addition, as one of the materials, so-called semi-drawn yarn (partially drawn yarn) is required, and it is advantageous to obtain this by high-speed spinning at approximately 2500 m/min or more, but there is a method of rapidly cooling during this outer spinning. Any so-called semi-drawn yarn obtained by a heat treatment method, a method of semi-drawing a semi-drawn yarn, etc. can be used. When drawing both yarns, it is preferable to adopt a stretching ratio that is lower than the natural stretching ratio of the undrawn yarn and higher than the natural stretching ratio of the semi-drawn yarn.
In addition, heat treatment to harden the yarn is generally required at 180°C or higher, depending on the degree of orientation of the yarn.

As described above, according to the present invention, it is possible to rationally produce a yarn that is bulky, has a silky feel, has good pilling resistance, and is rich in soft feel at the drawing stage.

[Brief explanation of drawings]

Fig. 1 is a process side view showing one embodiment of the present invention, Fig. 2 is a side view of the thread showing the structure of the thread in the middle of the process, and Fig. 3 is a process side view showing another embodiment of the present invention. Process side view, FIG. 4 is a side view of the yarn showing the yarn structure in the middle of the process. 1... Polyester undrawn yarn, 2... Polyester semi-drawn yarn, 3... Air entangled nozzle, 4... Hot roller, 5... Plate heater, 6...
Stretching roller, 7... Plate heater, 8...
Take-up roller, 9... Wind-up package, 1'...
Undrawn polyester yarn after stretching, 2'... Polyester semi-drawn yarn after stretching.

Claims (1)

[Scope of Claims] 1. A bulky composite filament in which an undrawn polyester yarn and a semi-drawn yarn (partially drawn yarn) are relaxed after composite stretching so that the former is relatively located on the yarn surface and the latter is relatively located in the core. A method for producing a sashimi-flavored material, which is characterized in that it is made into thread and is further heat-treated at a high temperature of 180°C or higher. 2. The method for producing a savory taste material according to claim 1, wherein the composite stretching is carried out at a stretching ratio that is lower than the natural stretching ratio of undrawn yarn and higher than the natural stretching ratio of semi-drawn yarn.