JPS58197365A - Simultaneous sizing and draft method of thermoplastic continuous yarn comprising substantially parallel filament and use thereof in producing fabric - 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 One method for manufacturing chains or fractions of continuous thermoplastic yarns suitable for use in production rooms is a method of manufacturing chains or fractions of continuous thermoplastic yarns suitable for use in production rooms. Starting from a continuous yarn, the special task is to draft and simultaneously size the raw material by immersing it in a liquid that generally contains the adhesive for the filaments that make up the yarn.

A known method for producing continuous yarn for textiles from thermoplastic polymers involves spinning the polymer in the molten state, cooling it, and
The filaments are compounded to form a thread and then drafted.

It is necessary to draft the filaments in order to impart to the yarn the necessary physical and mechanical properties for textile applications through molecular orientation.

There are two different known methods for producing draft yarns, and we will now consider the method that is more relevant to the present invention.

According to related known methods, the spun yarn is collected on a spool in an undrafted state in the first stage, where it is troughed by a multi-position draft or draft twist machine. each position acts on an individual thread. In these machines, each section is processed independently and is therefore influenced by slight differences in temperature and mechanical setup of each machine position, resulting in a yarn with completely constant properties. This is extremely difficult.

In many cases, for use in looms, the yarn collected from draft and draft twist machines must be subjected to a sizing operation to prevent individual filaments from breaking due to mechanical stress in the loom.

This operation consists of impregnating the yarn with a special size in the following manner: A beam, on which the previously warped yarn is wound, is placed on a beam support creel. The parallel and precisely regulated yarn is passed through a suitable device with an impregnation tank and squeeze rollers, then through a hot side dryer or an infrared oven or over a hot cylinder and finally again by a winder. Collect on the beam.

As mentioned above, in the method of the present invention, the incompletely drafted yarn obtained from the spinning step of the known method can be used as starting yarn for producing sized gouene or fractions for weaving, thus The usual process in which the yarn is manipulated in a draft or draft twist manner is not required. This new method combines separate drafting and sizing steps into one step and has clear technical and economical advantages.

Hereinafter, the method of the present invention will be explained based on the drawings. FIG. 1 is a schematic diagram for explaining the method of the present invention. A predetermined number of spuns of incompletely drafted yarn obtained by the spinning operation are loaded onto a supply creel (A), from which the yarn is unwound under a constant tension, and then threaded together using a guide in the form of a comb (B). The series arranged in parallel is passed through a feed and support roller system (C) rotating at a constant speed; the yarn then contains at least one adhesive and is kept at a temperature that allows drafting of the constituent filaments of the yarn. from there the yarn is passed through a system of traction rollers (E) rotating at a constant circumferential speed greater than the supply rollers (C). The roller system also squeezes out excess liquid remaining on the yarn. Between the supply roller (C) and the traction roller □E) the desired drafting effect and molecular orientation of the filaments are obtained for the individual tips. This is because the different circumferential speeds create tension and heat softens the polymer.

Thus, the present invention allows the conventional separate draft and sizing operations to be combined into a single simultaneous trut sizing operation.

After drafting and sizing, the yarn is passed through various types of furnaces (
F) and/or over a thermal cylinder (G) which has a thermal stabilizing effect on the yarn and is finally collected into a beam or the like using a winder (6).

A variant of the method according to the invention is that instead of feeding the yarn directly from a spout loaded on the creel, the yarn is fed from a beam, beamlet, large reel or other support formed by the winder in the path in front of it. It consists of supplying.

In this case it is also possible to combine many small beams before entering the feed roller (C) of the drafting process.

The novel method of simultaneous draft sizing of thermoplastic continuous yarns arranged parallel to each other according to the present invention is more cost-effective than previous methods. This is because the method according to the invention eliminates the need for a drafting step on the individual yarns using a drafting or draft twisting machine before or after assembly from the spinning operation in the known methods mentioned at the outset).・
Ru.

This is accomplished in conventional warping and sizing systems by simply replacing the conventional impregnated section with a simultaneous draft sizing section.

From a number of test results, it has been found that the fabrics produced from the textured yarns according to the novel method of the invention have excellent properties with respect to tightness and uniformity.

The invention will now be further illustrated by non-limiting examples.

Example 1 A partially oriented transparent polyester yarn (poy) soo tip with the following properties is loaded into a warping feed creel: Count: 82 Dtex Number of filaments: 48 Filament cross-section opening triangular breaking load: 260 to max. Elongation: 147% Theoretical residual draft: 1.464 The (82156) yarn was warped at a speed of 300 m/min under a tension of 10 f after checking for irregularities in a bindley device and then 4000 on a beam with a height of 180m
Collect as a single fraction of 0 m.

The warped fraction is placed on an unwinding stand and the yarn is passed through the blades of a straight comb.

The thread is held by a system of three rollers rotating in unison at a constant circumferential speed of 130 m/min and pulled with a tension of 10 f.

Next, Adex-Tw manufactured by Ce5alpinia
e. Immerse the yarn in a tank containing a thermal sizing bath consisting of a 10% aqueous solution of acrylic sizing and kept at a constant temperature of 90°C.

A system of three draft and squeeze cylinders rotating in unison at a constant circumferential speed of 200 m/min acts on all yarns simultaneously, resulting in a draft ratio of 1538 to the feed system.

At the exit of the draft and squeeze cylinder, the sizing water remaining on the yarn is about 80% of the dry yarn weight.

The yarn is then dried by passing it through a hot air oven, and then heated by steam by passing it over and in contact with five heated rotating cylinders, the first of which is kept at 105°C and the last at 90°C. Glue.

The speed of the heat cylinder is kept slightly less than 200 m, 7 minutes to allow a constant shrinkage of the yarn length before gluing.

At the exit of the adhesive cylinder, the thread is wound into a beam with a height of 180 m into 8 fractions of 5000 m each.

The average properties of the yarn thus drafted and sized are as follows: Count: 55.6 DteX Breaking strength: 2549 Ultimate elongation: 30% Shrinkage in boiling water: approx. 8% Yarn size retention: 8/85 % In the next step, the 8 sized fractions are combined on a 1550-height weaving beam for a total of 6400.

The beam is loaded into a LV151 N15san water loom, and a textured oleester yarn with a count of 56 Dtex and 24 filaments is used as the weft to weave at a speed of 360 bits/min and a density of 33 wefts/-.

The fabric is then washed over its entire width in a continuous washer at a speed of 15 m/min. The cleaning bath was softened by ion exchange resin treatment and kept at 90°C, 36/38 of 10 cc/43.
Be caustic soda, 5 cc/43 cleaning agent and U
It consists of water containing a sexestering agent of O,5f/no. This is then treated with two washing baths, hot and cold water, and neutralized with acetic acid.

Next, the washed fabric is jet cord dyed & (Me
Stain in a medium. The disperse dye used was D
ispers Blue Co1or Index 0
56, which was dissolved in a softening water bath so that the dye concentration was 2% of the weight of the fabric, plus 2% homogenizer and 0.2% of the weight of the fabric.
% dispersant is added. The pH was adjusted to 4.0 by adding formic acid.
5 and stabilized with monosodium phosphate.

Dyeing is carried out with the following temperature cycle: starting at 6 °C, increasing to 130 U at a rate of 1 °C/min; holding at 130 °C for 20 min; decreasing to 80 °C at a rate of IV min; then dyeing. The bath is bleached and the fabric is washed with hot and cold water.

The fabric was centrifuged, dried with hot air, and placed in a stenter (5te
(inter) machine and heat-adhered at a speed of 25 m/min. Height 140℃ws, weight 55f//rr
f, and chain shortening from raw material to finishing 5.5/
A fabric of 6% is obtained. When subjected to a homogeneity tester for detecting fabric defects, a high degree of uniformity and tightness of the chain threads is observed, with no transparent threads present.

Fugogo 1 Repeat the above experiment by supplying yarn with the following characteristics from the beam 1: Count: 80 Dtex Filament A: 36 Filament cross section two-triangular breaking strength 22511 Ultimate elongation: 153% Theoretical residual draft: 1.536 (80152) The feed cylinder rotates at a circumferential speed of 126 m/min, while the draft squeeze cylinder rotates at 200 m/min;
The draft ratio is 1.587.

Here, the sizing bath was a Kodak sizing bath kept at 90°C.
Consists of an 11% aqueous solution of 9519 polyester size.

The temperature of the fixed cylinders varies between 105°C and 90°C, and their circumferential speed is slightly less than 200 m/min.

The average final properties of the drafted and sized yarn are as follows: Count: 52.4 Dtex Breaking strength: 238 to 31% Ultimate elongation Shrinkage in boiling water: approximately 8% Yarn rise retention: 9/ The 9.2% risen fraction is compounded and woven in the same manner as in the previous example.

The process was carried out in the same manner as in the above example [cleaning, dyeing and fixing were performed,
The only difference is that the cleaning bath contains 0.5V/13 sodium carbonate instead of caustic soda.

A final fabric is obtained with a height of 140 cm, a weight of 53 flrd and a chain shortening from raw material to finish of 55/6%.

When the fabric is subjected to a homogeneity test, the almost perfect homogeneity of the chain threads is again observed.

J011 Repeat the above experiment by supplying yarn with the following properties from the beam: Count: 103 Dtex Number of filaments: 2 24 Filament cross section: Triangular Breaking strength: 262 f Ultimate elongation: 2 176% Theoretical residual draft: 1.776 ( 103158)
The feed cylinder rotates at a circumferential speed of 110 m/min, while the draft squeeze cylinder rotates at 200 m/min, with a draft ratio of 1.818.

The sizing bath is the same as in Example 2, and the temperature of the fixation cylinder varies from 110°C to 90°C.

The final average properties of the drafted and sized yarn are as follows: Count: 58.2 Dtex Breaking strength: 2571 Ultimate elongation: 28.5% Shrinkage in boiling water: approx. 8.5% Yarn size retention: The 8.9/9.2% sized fractions are then compounded and woven as in the previous example.

Washing, dyeing and fixing are carried out in the same manner as in Example 2.

A final fabric is obtained with a height of 140 cm, a weight of 56 f/rd, and a chain shortening of 6% from raw material to finish.

When the fabric is subjected to a homogeneity tester, good homogeneity of the chain yarns is again observed.

Load 96 pieces of partially oriented transparent polyester yarn (POY) with the following properties into 8 creel wheels with yarn guide and disc tension device: Count: 127 Dtex Number of filaments: 24 filaments Cross section: Triangular Breaking strength: 32B? Ultimate elongation: 163% Theoretical residual draft: 1.628 (127/78)
The yarn is threaded through a perforated warping table, then passed through the blades of a linear comb for 1°, and is retained by the feed roller of the simultaneous draft sizing system of the above embodiment and pulled under a tension of 11V.

The feed cylinder rotates at a circumferential speed of 117 m/min, while the draft squeeze cylinder rotates at 200 m/min, with a draft ratio of 1.709.

The Bozzett sizing bath was kept at 90°C.

It consists of a 10% aqueous solution of Wisacryl PN8 acrylic size.

The temperature of the fixed cylinder varies between 115°C and 95°C, and its circumferential speed is slightly less than 200 m/min.

The final average properties of the drafted and sized yarn are as follows: 77.2 Dtex Breaking strength: 320f Ultimate elongation: 31.4% Shrinkage in boiling water: about 8.3% Yarn size retention: 81/8.4% This test is limited to a constant maximum M property of the yarn, and the total number of yarns in the weaving test is not important (・.

However, the properties found by analyzing 32 yarns out of 96 indicate that the variance is extremely low.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram for explaining the method of the present invention. Procedural amendment Shosen 058/iF, May 20th, Director General of the Japan Patent Office Kazuo Wakasugi 1. Special indication of the case - No. 58-33007 2. Title of the invention 3. Person making the amendment. Relationship with the case. Patent applicant. Name: Hal Regina Nis, Pee, Knee. 4. Address of agent: Toranomon 40 Mori Building 1L, 5-13-1 Toranomon, Minato-ku, Tokyo Specification, drawings and power of attorney 6. l11@Correct contents ■ -Name of the representative of the patent applicant as per the attached sheet Supplement light. (21 Engrave the engraving of the specification as shown in the attached sheet. 131 Engrave the engraving of the drawings as shown in the attached sheet. (4) Enrich the power of attorney as shown in the attached sheet.

Claims (9)

[Claims] (1) A thermoplastic continuous yarn whose filaments are substantially parallel and which are not completely drafted as a starting material in the manufacture of a chain or fraction of a synthetic continuous yarn that is substantially completely drafted and suitable for use in a textile manufacturing room. production of chains or fractions of synthetic continuous yarns, characterized by simultaneous or substantially simultaneous drafting and sizing upon immersion of the raw material in a tank containing a liquid in which at least one filament adhesive is present. Law. (2) The method of paragraph 1, wherein the threads are arranged parallel to each other before drafting and sizing. (3) The method of item 1 or 2, wherein the drafting operation is carried out by means of two roller systems placed at opposite ends of the tank and rotating at appropriate different speeds. (4) The method of any of the preceding clauses, wherein the yarn is simultaneously drafted by several traction systems to vary the draft ratio. (5) The method according to any of the preceding items, wherein the thermoplastic yarn is primarily a polyester, polyamide, polyethylene or polypropylene yarn or a modification thereof. (6) The method according to any of the above items, wherein the liquid containing the adhesive has a temperature that allows the filaments constituting the thread to be drafted. (7) The method shown in the drawings. (8) Methods described in Examples. (9) A fourteenth method, in which a polyester or acrylic size is used for sizing.