JPH05247766A - S-z alternately twisted yarn and its production - Google Patents

Abstract

PURPOSE:To provide an S.Z alternately twisted yarn comprising acetate filaments excellent in the dry touch, tension and stiffness. CONSTITUTION:This S.Z alternately twisted yarn is characterized in that high density parts 1 is formed by adhering >=40% of the acetate fibers of a yarn consisting mainly of the acetate fibers to each other with a solvent and bulky parts 2 weakly adhered in the twisting direction reverse to the twisting direction of the high density parts are continuously repeated >=30 times along the longitudinal direction of the yarn.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an S / Z alternating twisted yarn having a form and a texture of a strongly twisted yarn used for clothing.

[0002]

2. Description of the Related Art A cool feeling material is required to have a feeling of dryness, a feeling of dryness, a feeling of tightness, etc., and a yarn is not in a raw yarn state, but a real twist is generally given by a twisting machine.
As the number of twists increases, the density of the entire fiber yarn becomes higher, resulting in a hard texture and poor productivity.

[0003]

Therefore, for polyester filaments and polyacrylonitrile filaments that are easily fused by heat, a false twisting machine with good productivity is used to perform false twisting at high temperature and high twist number. Has produced an S / Z alternating twisted yarn of a strong twisted yarn type, but no yarn having satisfactory texture, luster and dry feel has been obtained from acetate long fibers.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a high-density portion in which 40% or more of the number of acetate fibers of a yarn mainly composed of acetate long fibers is solvent-bonded The S / Z alternating twisted yarn is characterized in that the bulky portion, which has a twisting direction opposite to that of the high-density portion and weakly adheres, is continuously and alternately repeated 30 times / m or more along the longitudinal direction. Is the gist.

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

FIG. 1 is a side view showing the yarn form of the S / Z alternate twisted yarn of the present invention, FIG. 2 is a cross-sectional view of a densely bonded high density portion, and FIG. 3 is a cross-sectional view of a weakly bonded bulky portion. FIG. 4 is a side view showing an example of an apparatus for producing the S / Z alternating twisted yarn of FIG. 1, in which (1) is a strongly bonded high density portion, and (2) is a weakly bonded bulky portion. 2, FIG. 3, and FIG. 4, (3) shows an example in the case of using acetate long fibers.

The S / Z alternating twisted yarn shown in FIG. 1 is produced by supplying the acetate filaments (3) by the feed roller (4) and the solvent (15) by the jet nozzle (5) in the manufacturing apparatus shown in FIG. After applying, the solvent is evaporated in the first heater (6), false twisting is performed in the false twisting spinner (7), passes through the delivery roller (8), and is heat-relaxed by the second heater (9). It is a thing.

The long fibers mainly used in the present invention may be either diacetate fibers or triacetate fibers,
It can also be mixed with other fibers. Other fibers are not particularly limited, but are preferably long fibers, and the raw materials are synthetic fibers such as polyester fibers, polyamide fibers, polyacrylonitrile fibers, regenerated fibers such as rayon and cupra, and natural fibers.

The mixing ratio of the acetate fibers is preferably 60% or more, and if it is less than 60%, sufficient adhesiveness cannot be obtained.
It is not preferable because the feeling of crispness is insufficient and the dryness of the acetate fibers cannot be expressed due to insufficient mixture ratio.

In (1) of FIG. 1, a relatively large amount of solvent adheres,
As shown in (3) of FIG. 2, 40% or more of the number of acetate long fibers is a high-density portion that is firmly bonded, and the twisting direction is the same as the twisting direction in false twisting. If the number of adhesives (= adhesiveness) is less than 40%, sufficient twist fixation cannot be achieved, untwisting occurs when passing the false twist spinner (7), and unpleasant feeling is unsatisfactory.

In (2) of FIG. 1, a relatively small amount of solvent adheres and is untwisted when passing through the false twist spinner (7), and the twisting direction is opposite to that of (1), as shown in (3) of FIG. The weakly adhered portion of the acetate long fibers is separated and separated to become bulky.

(1) and (2) of FIG. 1 are continuously alternated, and the high-density portion (1) firmly adhered is retained 30 times / m or more. (1) When the part is less than 30 times / m,
The hard portion of (1) becomes long and coarse and rigid, and stitch skipping easily occurs during knitting, and the difference in gloss tends to be conspicuous, which is not preferable.

The length ratios of (1) and (2) in FIG. 1 are in the range of 1: 1.5 to 4, and (2) is long.

Fibers other than acetate fibers are not bonded by a solvent and are often used mainly as reinforcing fibers for S / Z alternating twisted yarns.

The solvent used in the present invention is a solvent having a dissolving ability and a swelling effect on acetate fibers,
As an example, acetone, ketones such as methyl ethyl ketone, esters such as ethyl acetate and n-propyl acetate, halogenated hydrocarbons such as dichloromethane, chloroform, ethers such as dioxane, cellosolve acetate, cellosolve, triacetin, diacetin, etc. There are also polyhydric alcohol derivatives, etc., and in order to weaken the adhesiveness, they may be used after being diluted with water, an organic solvent or the like.

The solvent is supplied to the yarn passing through the inside of the jet nozzle (5) by a solution distribution device in a constant amount for each weight.
Adhesion of the solvent becomes strong and weak in the longitudinal direction due to yarn running and yarn swaying such as false twisting.

[0017]

EXAMPLES The present invention will be described in more detail with reference to the following examples. The methods for measuring the adhesiveness and the number of S · Z in the examples are as follows.

[Adhesiveness] The number of acetate fibers was determined from a cross-sectional photograph of the bonded portion, and the average value of 10 photographs was calculated according to the following formula. Adhesiveness (%) = (F + 1−F ′) / F × 100 (%) where F: number of acetate fibers before adhesion F ′; number of acetate fibers after adhesion

[Number of S and Z] Using a stereoscopic microscope, one set of S twist and Z twist on the side surface of the yarn is used, and the number of repetitions (times /
m).

[0020]

[Example 1] 1 equipped with the solvent applying device shown in FIG.
Using a feed 2 heater false twisting machine (manufactured by Mitsubishi Heavy Industries, Ltd.), diacetate long fiber bright 200d / 3
0f was supplied by a feed roller (4) at an excessive supply of 2%, 100% triacetin was applied as a solvent by a jet nozzle (5), and then contacted with a first heater (6) at 150 ° C. to evaporate the solvent. While performing false twisting with the false twist spinner (7) at a speed of 100 m / min, the first delivery roller (8) and the second delivery roller (10) are indirectly heated to 200 ° C. with a 3% oversupply condition. The heat was relaxed by the second heater (9) of the system and wound by the winder (13). S / Z alternating twisted yarn was obtained by changing the amount of triacetin attached and the false twist number, the adhesiveness and the S / Z repeat number were measured, and the 20-gauge cylinder knitted with a disperse dye at 20 ° C. The feeling was judged and the results shown in Table 1 were obtained. The adhesiveness became stronger as the amount of triacetin attached increased, and 1.8% or more was required. The number of S-twisted and Z-twisted repetitions is low when the amount of triacetin adhered is low, and low when the false twist number is low and requires 800 t / m or more. It was good.

[0021]

[Table 1]

[0022]

Example 2 Using the same processing machine as in Example 1, the triacetate long fiber bright 200d / 34f and the polyester (polyethylene terephthalate) long fiber drawn yarn semidull 30d / 12f were over-fed by 3% by a feed roller in the aligned state. After applying 100% triacetin as an adhesion amount of 6.5% (= 0.137 g / min at a flow rate) by a jet nozzle, it is brought into contact with a first heater at 150 ° C. to evaporate the solvent to 80 m / The false twisting process is performed at 1600 t / m with the false twist spinner at the speed of 1 min.
Between the delivery roller and the second delivery roller
In an excessively supplied state of 3%, a heat relaxation treatment was performed by a second heater of an indirect heating system at 220 ° C., and the film was wound by a winder.
The S / Z alternating twisted yarn obtained had an adhesiveness of 91% and an S / Z repetition number of 67 times / m, and in a 20-gauge tubular knitted dyed with a disperse dye at 120 ° C., a slickness, a dry feel, and a tense feel It was good.

[0023]

EFFECTS OF THE INVENTION The S / Z alternating twisted yarn of the present invention is a material having a strong twist-like feeling of dryness, tightness and tension, and is bulky and lightweight, which cannot be obtained by the additional twisting process using a twisting machine. It is most suitable for knitting as a material, has high productivity, and has extremely high industrial value.

[Brief description of drawings]

FIG. 1 is a side view showing an example of an S / Z alternating twisted yarn of the present invention.

FIG. 2 is a cross-sectional view showing an example of a strongly bonded portion of the S / Z alternate twisted yarn of the present invention.

FIG. 3 is a cross-sectional view showing an example of a weakly bonded bulky portion of the S / Z alternating twisted yarn of the present invention.

FIG. 4 is a side view showing an example of an apparatus for producing the S / Z alternating twisted yarn of the present invention.

[Explanation of symbols]

 1 Strongly adhered high density part 2 Weakly adhered bulky part 3 Acetate filament 4 Feed roller 5 Jet nozzle 6 1st heater 7 False twist spinner 8 1st delivery roller 9 2nd heater 10 2nd delivery roller 11 Guide 12 Satin Bar 13 Winding Roller 14 Winding Thread 15 Solvent

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[Procedure amendment]

[Submission date] March 10, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

Title of invention S / Z alternating twisted yarn and method for producing the same

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

Claims (1)

[Claims] 1. A high-density portion in which 40% or more of the number of acetate fibers of a yarn mainly composed of acetate long fibers is solvent-bonded and a bulky portion in which the twisting direction is opposite to that of the high-density portion and weakly bonded The S / Z alternating twisted yarn is characterized in that it is continuously repeated 30 times / m or more along the longitudinal direction.