JPS59116436A - Special false twisting crimping process - 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 special false twisting and crimp processing method, and more specifically, it is possible to perform false twisting and crimping on thermoplastic synthetic fiber yarns after heat treatment without increasing the size of two machines. False twisting of yarn in which the yarn path in the heat treatment zone and the false twisting zone can be lengthened, and in particular, the false twisting and untwisting zone can be made sufficiently long and physical property unevenness is imparted in the longitudinal direction of the yarn before reaching the false twisting zone. This relates to a new special false twist crimp processing method that allows for stable processing.
.

Conventionally 1 When thermoplastic synthetic fiber yarn is heat-treated and then false-twisted and crimped using a normal two-stage heater false-twisted and crimped machine 9 For example, JP-A-57-161135 first discloses
The yarn is fed to a first feeding device, then heat-treated by a second-stage heater, then taken up by a second take-off device, then guided to a first-stage heat treatment heater, and then passed through the first-stage heat treatment heater. Next, a false twisting spindle and first stage heat treatment were installed.

A method is disclosed in which false twisting and crimp processing is performed between a ring heater and a first take-off device, and the material is taken off by the first take-off device.

However, in this method, for example, 3
It is necessary to shorten the distance from the supply device to the heat treatment heater, such as when performing relaxation heat treatment of 0.096 or more, or when attaching liquid to the yarn after passing through the supply device and bringing it to the heat treatment zone. inappropriate in some cases. In addition, when heating unevenness occurs in the longitudinal direction of the yarn in the false-twisting heating zone, for example when imparting physical property unevenness in the longitudinal direction of the yarn to be provided in the false-twisting zone 1, the length of the untwisting zone If the length is insufficient compared to the length of the heating zone, untwisted yarn or single yarn breakage may occur.
If the false twisting spindle is led directly to the first take-off device as in Japanese Patent No. 135, there is a drawback that the untwisting zone cannot be sufficiently long.

The purpose of the present invention is to solve the above-mentioned drawbacks. 2) When thermoplastic synthetic fiber yarn is heat-treated in a conventional two-stage heater false-twisting machine and then false-twisted and crimped. The threading method provides a special false twist crimp process with sequential characteristics.

That is, the present invention comprises a feed roller (1), a false twist heater (2), a false twist spindle A/ (3), a first delivery roller (4), a reheat treatment heater (5), and a second delivery row (6). The thermoplastic synthetic fiber yarn is placed in a two-stage heater false twisting machine in which the fibers are arranged in this order almost in a straight line, and the thermoplastic synthetic fiber yarn is passed through the first delivery roller (4) and the reheat treatment heater (5).
), the feed roller (1), the false twist heater (2), the false twist spindle (3), and the second delivery roller (6) in this order to thread the yarn and perform the false twist crimp process. The gist is the false twist crimp processing method.

The present invention will now be described in detail with reference to the drawings.

FIG. 1 is a process schematic diagram showing an example of the present invention.

In Figure 1, the feed roller (1), false twist heater (2), false twist TV (3), first delivery row (') + reheat treatment heater (5) and second delivery roller (6) are approximately - They are arranged in a straight line from above to below. In addition, a reheat treatment heater (5
) is provided with a thread guide (7) diagonally below. In addition.

Other yarn guides that change the direction of yarn travel are not shown. In FIG. 1, the yarn (Y) is immediately guided to the reheat treatment heater (5) after passing through the first delivery roller (4) and heat treated, and the yarn guide provided below the reheat treatment heater (5) Reverse the direction of travel from the guide (7).
It is guided by the feed roller (1) and then heat-treated in a heated state by the false-twisting heater (2) and the false-twisting spindle/I/(3) located below the false-twisting heater (2).
Next, after passing through the false twisting spindle (3), the false twisting spindle /L/ (3) untwists it, and the second delivery low two (6) below the first delivery roller (4) and the reheating heater (5). ) and then rolled up by a separate winding device (not shown).

According to the present invention, the yarn (Y) after passing through the first delivery row (4) is immediately led to the reheat treatment heater (5). Since the running tension of the yarn leading to the reheat treatment heater (5) is extremely low when carrying out the reheat treatment, it is necessary to reach the reheat treatment ζ-ter (5) in the shortest distance without passing through the guide of the yarn running yarn path. It is suitable for cases where you want to

2. For example, when you want to suppress the transfer of the liquid to the yarn guide as much as possible after applying liquid to the yarn leading to the reheat treatment heater (5), the number of guides in the yarn traveling path may be reduced. This is suitable when it is desired to minimize the distance and to reach the reheat treatment heater (5) in the shortest distance.

Furthermore, according to the present invention, false twist spindle A/ (3)
The distance from the second delivery row (6) to the second delivery roller (6) is short, and the false twist spindle A/ (3) to the male release roller (4) is short.
), i.e. the reheating zone (the first delivery roller (4) and the second delivery roller ( An untwisting zone with a length of 6) is obtained. Therefore, 2 e.g. reheat treatment heaters (
After intermittently attaching water to the yarns leading to step 5), heat treatment is performed using a reheat treatment heater (5) to give a tr-heat treatment material in the longitudinal direction of the 8 yarns, followed by false twisting. As heating spots that occur in the longitudinal direction of the yarn in the false twisting heating zone are untwisted in the sufficiently long untwisting zone, untwisting due to residual actual twisting or untwisting may occur. This is suitable for preventing the occurrence of single yarn breakage due to excessive tension in the yarn during excessive untwisting.

Further, according to the method of the present invention, the second delivery 10-ler (6
) to the winding device can be made exactly the same as before, so there is also the advantage that the yarn breakage detection device installed near the exit of the second delivery roller (6) can be used without modification. .

8 As mentioned above, the present invention is particularly advantageous in that thermoplastic synthetic fiber yarns are subjected to relaxation heat treatment, e.g., in order to obtain a sufficient relaxation rate when subsequently subjected to false twisting and crimping. In order to produce crimped yarn with less untwisting and less fuzz when performing crimped yarns, a normal two-stage heater false twister can be used, and it is equipped with a simple guide and special A special false twist crimp process can be performed by simply doing this.

Next, the present invention will be explained in more detail with reference to Examples.

Example 1 Birefringence (Δn) obtained by high-speed spinning is 54.6X10-
'.

A 260 denier 48 filament polyester undrawn yarn with a density of 1.34569/d and a cutting elongation of 115% was used with an L3-6 type plate twister manufactured by Mitsubishi Heavy Industries, Ltd. The yarn threading shown in Figure 1 was carried out in the order shown in Table 1. The stretching and false twisting process following the relaxation heat treatment is carried out under the following processing conditions, and both sides have a tightened gauze bundle part and a bulky crimp part.

A special pre-combustion crimped yarn that is stable against external forces was obtained.

Table 1 Example 2 The same sample and false twisting machine as in Example 1 were used.

Above the reheat treatment heater (5) of the false twisting machine, a rotating roller with its lower part immersed in water is installed to perform the reheat treatment by intermittently bringing the running yarn into contact with the surface of the loaf. The heater (5) makes it possible to apply water intermittently to the yarn before reaching the point of t. Following the heat treatment, a drawing pre-combustion process was performed to obtain a special false-twisted crimped yarn having darkly dyed areas and lightly dyed areas alternately in the longitudinal direction of the yarn.

Table 2 Comparative Examples Figure 2 ((8) indicates the thread guide, other symbols indicate the first
A false-twisted crimped yarn was produced in the same manner as in Example 1, except that the conventional threading shown in (same as the figure) was threaded in the order in which the yarn was threaded at the start until reaching the reheat treatment heater (5). This causes slack in the running yarn.

Yarn hooking has poor operability, and even during processing, the running tension of the yarn from the feed loaf (1) to the reheating heater (5) is low, and the yarn sways due to outside air currents. There was a problem.

In addition, when a temporary crimped yarn was produced in the same manner as in Example 2 except that the conventional threading shown in FIG. Some feathers were seen here and there.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a process showing an example of the present invention, and FIG. 2 is a schematic diagram of a conventional process. (7): Yarn (1): Feed roller (2): False twist heater (3): False twist spindle (4): First delivery roller (5): Reheat treatment heater (6): Second delivery loaf (7), (8): Yarn guide guide patent applicant Unitika Co., Ltd. Figure 1 Figure 2 Procedural amendment (voluntary) 1. Case indication Patent application No. 1987-229146 2. Name of the invention Special false twisting Reduction Processing Method 6, Relationship with the Amendment Person Case Patent Applicant Address 1-50 Higashihonmachi, Amagasaki-shi 541 Address 4-68 Kitakyutabe-cho, Tsuka-ku, Osaka Name
Unitika Co., Ltd. Patent Department Telephone: 06-281 + 5258 (dial-in) F5. Contents of amendment (1) [54,6X10-4 J on page 7, line 13 of the specification]
is corrected to "54.6X10-" J.

Claims (1)

[Claims] 1, feed roller (1), false twist heater (2), false twist spindo tv (a), first delivery roller (4
)l The thermoplastic synthetic fiber yarn is transferred to a two-stage heater false twisting machine in which a reheat treatment heater (5) and a second delivery roller (6) are arranged in this order in a substantially straight line. (4), Reheat treatment heater (5) I
Special false twisting characterized by performing false twist crimp processing by threading the yarn in the order of feed roller (1), false twisting heater (2), temporary bridge spindle (3), and second delivery roller (6) Shrinking processing method.