JPH04100930A - Production of silk wool-like conjugate textured yarn - Google Patents

Abstract

PURPOSE:To obtain the title bulky sprinkly colored yarn having high qualities and excellently silk wool tone which have never existed hitherto by doubling a thick yarn among thin yarns of polyester and a drawn yarn of polyester by a specific method and falsely twisting. CONSTITUTION:First, a thick-thin yarn Y1 of polyester is fed to a falsely twisting heater 3 of liquid heat transfer medium type, brought into contact with the heater. A passed and drawn yarn Y2 of polyester having 70X10<-3> to 150X10<-3> double refraction is traveled just above the top of the falsely twisting heater 3 and yarn temperature right after passing just above the top of the falsely twisting heater 3 is 60-100 deg.C. Successively, the yarn Y1 after passing the falsely twisting heater 3 and the yarn Y2 having 60-100 deg.C yarn temperature are doubled by a twisting stopping pin 10, falsely twisted in a number of false twists satisfying the formula I and the formula II [T is number of false twists (T/M: D is fineness (denier)] to give the objective textured yarn. In order to pass the yarn Y2 just above the top of the falsely twisting heater 3, guides 9A and 9B are laid and preferably a yarn traveling path is bent.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is a composite material that has a silk wool-like texture, that is, a spun-like texture characteristic of false twisted yarn, but also has a soft silky texture. This invention relates to a method for producing processed yarn.

(Prior art) Conventionally, it has been known to use thick and thin yarns, so-called thick and thin yarns, and blended systems consisting of yarns with different heat shrinkage rates, in order to obtain N-like texture, silky texture, bulky properties, etc. There is.

For example, Japanese Patent Application Laid-open No. 55-163232 discloses that thick-and-thin yarn and mixed shrinkage yarn having a residual shrinkage rate difference of 5% or more are subjected to air fluid treatment.
Publication No. 2 describes a mixed shrinkage yarn which is a thick-and-thin yarn and is composed of a group of different shrinkage coefficients.

However, the yarns described in these conventional techniques use spun filaments as they are (flat yarns), and are suitable for producing a silky texture, but lack a sense of volume. Met.

In other words, the texture of the synthetic IA fibers plays a role in the following two types of tumors.
I will be treated. One of them is a silky texture, and flat yarn is usually used. However, since flat yarn has a slimy feel, it is difficult to obtain a texture equivalent to that of silk. It is. Another type of texture is a span-like (wool-like) texture, and a processing system in which crimps are added to the throw by a false twisting method or the like is often used. Furthermore, the false twisting method is often used for synthetic fiber filaments because it can also remove the slime and clutter described above. However, the silky texture and span mentioned above! [Although it is difficult to achieve both textures because they tend to be contradictory, a silk spun texture that has both textures is desired for applications such as women's blouses.

In normal false twisting processing methods, there are methods for achieving such a silk spun (wool) texture, such as reducing the number of false twists or lowering the temperature of the false twisting heater. 62-15664, JP-A-53-13982.5 and JP-A-63-28232.
The method is described in Publication No. 8 and the like.

(Issues to be solved by the invention jl) However, the Japanese Patent Publication No. 62-15 which reduced the number of false twists
The method described in Japanese Patent No. 654 had a problem in that the residual torque was high and the fabric was greatly distorted after knitting.

On the other hand, 180
The method described in JP-A-53-139823, in which false twisting is performed in a region lower than the false twisting heater temperature of about ~230°C (
(130 to 160°C), the false twisting temperature is still high and a sufficient silky texture cannot be obtained.

In addition, Japanese Patent Application Laid-Open No. 63-282326 has 80 to 160
Although it is described that the false twisting process is performed in an extremely low temperature range of "C", there is no disclosure whatsoever regarding the structure of a false twisting heater that performs the process in this extremely low temperature range.

That is, commonly used false twist heaters are heated by a liquid heating medium (damsam liquid), and the dampsam liquid vaporizes after t4a'cu and circulates within the heater, and has a characteristic that it collects in low-temperature areas. , it is possible to uniformly distribute the temperature inside the heater. However, due to the relationship with the boiling point of the previous air, it is difficult to perform temperature control at extremely low temperatures below 180'C, much less 100'C.
It is not possible to obtain a heater temperature below. Further, if an electric heater is used instead of a liquid heat medium, it is possible to obtain a heater temperature of 100'C or less, but it is extremely difficult to achieve uniform heating with an electric heater as in the case of a liquid heat medium. If the false twisting process is performed by nonuniform low-temperature heating, dyeing spots will occur in the yarn, resulting in a decrease in quality. For this reason,
With the content disclosed in the above-mentioned prior art, it was not possible to obtain a yarn having high quality and a noticeable silk wool-like texture.

The present invention solves the above-mentioned problems, and improves and advances the low-temperature false-twisting method that is effective in obtaining a silk wool-like texture. The object of the present invention is to provide a composite processed yarn of unprecedented high quality and remarkable silk-wool-like texture, rich in marbling-like bulky properties, by heating.

(Means for solving the problem) The present invention uses polyester thick and thin yarn and a birefringence of 70 to 15.
In simultaneously false-twisting the 0XlO-5 polyester drawn yarn, the thick and thin yarn is passed through a false-twisting heater, and then -
10,000, the polyester drawn yarn was run directly above a liquid heat medium type false twisting heater, and the yarn m degree after passing directly above the false twisting heater was 6.
After reaching a temperature of 0 to 100'C, both yarns are combined using a trowel, and then false twisting is performed to a number of false twists that satisfies the following formula.

H= (275000/(D+60)+800)Xl
, 161, 05 H≦T≦1.2H T: Number of false twists (T/M) D: Tightness (denier thin) Thick and fine polyester yarns that can be used in the present invention include those whose main constituent unit is polyethylene terephthalate. It is not particularly limited, and may contain copolymerized components such as polyethylene glycol, isophthalic acid, and other lower alkyl esters.The degree of orientation of the polyester thick and thin threads may be the same as that of ordinary thick and thin threads, ) has a birefringence index (η) of 1
5~50×10-! Moderately 1 degree, complex fr in details (thin parts)
The ratio may be about 140 to 170 x 101, the cross section of the main part and the details, the magnetic ratio of about 1.2 to 3 times, the length of the part with uneven thickness of 0.5 to 5 cm, and 10 to 30 per meter.
It is common for there to be approximately one. The m degree can be usually about 20 to 150 deniers, which can be subjected to false twisting, and the new surface shape can be a variety of irregular cross-section yarns such as round cross-section, triangular cross-section, U-shape, etc. .

Next, polyester drawn yarn has a birefringence index (η) of 70 to 15.
A half-drawn to drawn yarn of V is used.

As such a polyester, in addition to polyethylene terephthalate, a modified polyester in which isophthalic acid, polyethylene glycol, etc. are partially co-enriched can also be used. In addition, the elongation is preferably 30 to 120 degrees, and the elongation is preferably 5 to 120 degrees.
It is preferable to provide a difference in elongation of about 307.

The false twisting method is not particularly limited, and an IN-DROW (false twisting at the same time as stretching) method, an 0UT-DROW (stretching before and after false twisting) method, etc. may be used depending on the degree of orientation of the polyester filaments. Further, the twisting device can be a spindle type, a friction type, an air nozzle type, etc., but in order to perform stable heater heating, the present invention uses a spindle type. explain.

FIG. 1 is an explanatory diagram showing an example of the present false twisting method.
From 1), supply at a rate of about 100 to 120 m/m+n,
Thick and thin effects are produced by cold stretching between feed rollers (Fig. 2). A known thick and thin technique can be used for the cold drawing conditions, and the undrawn polyester filament yarn to be supplied has a birefringence index (η) of 15 to 50.
X about 10-5, cold stretching ratio is 0.1 to natural stretching ratio
About 1.10 times is preferable.

The thick and thin yarn (Yl) is guided from the second feed roller (2) to the false twist heater (3). At this time, the polyester drawn yarn (Yl) is also guided through the second feed roller (21) to the false twist heater (3).
) The travel paths of both yarns in the vicinity are made different as follows.

That is, while the thick and thin yarn (Yl) runs in contact with the false twisting heater surface, the drawn yarn (Yl) runs along the guide (9A),
(9B) is provided to bend the thread running path and run the thread directly above the false twisting heater (3).

FIG. 2 is an enlarged explanatory view of the vicinity of the false twisting heater (3). The false twisting heater (3) needs to be able to perform uniform heating as described above, and for this reason, it is necessary to use a type in which a liquid heating medium such as Damsam liquid is circulated inside. It is impossible for this type of false twisting heater (3) to perform uniform heating at temperatures below about 180"C. Therefore, in the thread running path (a) of the thick and thin thread (Yl), the thread (Yl) ) becomes overheated, and the yarn temperature immediately above the false twisting heater (near point X in Figure 2) also becomes about 145°C.
Guide (9A).

When the yarn (Y) is moved away from the false twisting heater (3) by (9B), since the false twisting heater surface is curved, the weld length gradually becomes shorter and the yarn temperature at the X point also decreases. By this method, the guides (9A) and <9B) are set so that the yarn temperature near the X point is 60 to 100°C. Guide (9A),
The position of (9B) changes depending on the running speed of the yarn (Y'l), the temperature of the false twisting heater (2), etc., but usually the yarn is separated by about 15mrn at the center of the false twisting heater (2 points in Figure 2). It will be near the point where the guide is (9A), (9B).
) To set the position, use the guides (9A), (9B'
) may be arranged in multiple stages as shown in FIG. 2 or made movable. In addition, after setting the guides (9A) and (9B) at predetermined positions, it is also possible to change the thread running speed to set the thread temperature near the X point to 60 to 100°C. When the actual thread (Y) is separated by about 15 mm,
This temperature range is obtained at yarn speeds of the order of 40-120 m/min.

The drawn yarn (Yl) as described above and the thick and thin yarn (Yl) are combined again through the fuel ratio pin (1a) and supplied to the twisting device (4). The fuel ratio pin (10) suppresses the propagation of the twist to the false twist heater (2), and also doubles both yarns at the same X location. Further, the shape may be a known round cross-sectional shape, with a diameter of 2 to 15 mm, preferably 4 mm.
Threads with a diameter of about 6 mm or so are preferred with less thread breakage.

Furthermore, the twist stopper (10) may be located between the false twisting heater (3) and the twisting device (4). It's better to spend $1 on the 1st time.

Next, the twisting method will be described. - The useful number of false twists is expressed by the formula % (D is the fineness denier) of Heparin as is publicly known, but in the present invention, the number of false twists is 5 to 20, preferably 10 to 20% greater than the number of false twists. Twisting is done by number. By twisting in this range, the residual torque is reduced and the distortion when made into a fabric is reduced. The shape of the resulting crimped yarn is also formed from finer crimps than the normal crimped waveform, resulting in a fine grained texture. However, according to the Heparine formula, if the twist exceeds 20%, the false-twisting operability will deteriorate significantly.

Further, it is preferable that the tension on the false twisting side is 0.15 to 0.5 g/d. Therefore, the second feed roller (2) is
It is preferable to set it as a feed of about 5-5%.

Similarly, M! The twisting side is preferably in a range of 1.5 to 4 times the tension T.

It is preferable that the drawn yarn (Y2) after passing through the false twisting castle and the thick and thin yarn (Yll) have a heat yield difference of 10% or more. That is, the drawn yarn (Y2M has a relatively high heat yield rate of 20 to 30%). Thick and thin yarn (Yl) has a low diving shrinkage rate of 4 to 10%.

In addition, after passing through the untwisting castle, if a fluid entanglement treatment device (71,) is installed to impart entanglement, the conjugation property will be improved;
It is preferable to provide entanglement of about 0/M.

In Fig. 1, the second heater (6) provided downstream of the fluid entanglement processing device (1) performs a relaxing set, and is used to control the third feed roller (5) and the fourth feed roller (2).
6)l! l is an overfeed of 5 to 15 times. or,
The temperature of the second heater is preferably about 160 to 200"C, and the heater may run the yarn (Y) in contact with it. When such a relaxing set is performed, the residual yield value can be stably maintained at about 4 to 10%. When made from thick and thin thread, a smooth appearance with few irregularities can be obtained.

(Example) Example 1 A polyethylene terephthalate semidal undrawn yarn 145d/24f having a birefringence index (η) of 25×10−x was fed from the seventh feed roller in FIG. 1 at a feed rate of −1.9.
% (0.85 times the natural stretching ratio) to develop thick and thin. The thick part birefringence of such a thick and thin thread is 40X10-j, and the thin part birefringence is 165x]o-
s elongation was 35%.

On the other hand, a high shrinkage drawn yarn 30d/12f (elongation 55%) with a birefringence index of 146 x 10-3 is fed from the second feed roller, and the drawn yarn is placed in a Dam Sam liquid using a satin yarn guide as shown in Fig. 2. 0 from type false twisting heater (2 points)
Pass through the castle directly above it at a distance of ~20 mm, and have a diameter of 8 m.
The threads were combined with the thick and thin threads through a twisting pin of 1.5 m, and false twisted under the following conditions to obtain a composite textured thread of 130 d/60 f.

False twisting speed 80m/min False twisting heater temperature 160℃ False twisting tension 0.23g/d Solution Twisting tension 0.5
q/d 3rd to 4th feed roller feed ii, 1% 2nd
Heater temperature: 160'C Number of entanglements: 65 pieces/m Immediately after passing through the third feed roller, the boiling water shrinkage of each yarn was 27% for the drawn yarn and 46% for the thick yarn.

The results are shown in Table 1.

Incidentally, the latent crimp rate was measured according to JIS L-1090 (5-7).

(The following is a blank space) (Effects of the invention) According to the present invention, it has a heathered effect due to the difference in shading of thick and thin yarns and a bulky fruit set due to high shrinkage yarns, and also has a spun-like (
It is possible to obtain a yarn that has both a wool-like texture and a silky texture, that is, it has a silk wool-like texture without sliminess or bulkiness, and is extremely useful for new applications such as women's materials and casual wear. It is useful.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an example of a false twisting device used in the present invention,
FIG. 2 is an enlarged explanatory view of the vicinity of the false-twisting heater of the same false-twisting device.

Claims (1)

[Claims] (1) Polyester thick and thin thread and birefringence 70-150×
In simultaneously false-twisting the drawn polyester yarn of 10^-^3, the thick and thin yarn is passed through a false-twisting heater, while the drawn polyester yarn is run directly above a liquid heat medium type false-twisting heater, and the false-twisted yarn is passed through a false-twisting heater. After the yarn temperature immediately after passing through the area directly above the heater is set to 60 to 100°C, both yarns are combined using a twisting pin, and then false twisting is performed with a number of false twists that satisfies the following formula. A manufacturing method for silk-wool-like composite yarn. H=(275000/(D+60)+800)×1.1
51.05H≦T≦1.2H T: False twist number (T/M) D: Fineness (denier)