CZ212895A3 - Decating process of textile cloth - Google Patents

Abstract

A textile fabric, opt. with an appreciable portion of wool fibres, is decatised in an autoclave together with a covering fabric while wound round a perforated decatising drum. The covering fabric is a surface structure of non-oriented fibres weighing less than 80 gm<-2> and having a water vapour permeability of more than 3500 gm<-2>/24 hours.

Description

BACKGROUND OF THE INVENTION The present invention relates to a method of decatting (vapor deposition to shine) a woven fabric of wool fibers or a fabric made using a substantial proportion of wool fibers. In this case, the textile fiber is wound together with the tread on a perforated decatting roller and the coil thus formed is subjected to an autoclave heat treatment.

Ha. &Amp; a, riLoi.-. state t e.c, hicks

In generally known decatting processes, the coils are optionally formed outside the decatting autoclave, whereupon the coil is placed in the autoclave or inside the decatting autoclave so that the transport of the coil back and forth is eliminated. in an autoclave. DE-AS 17 85 460 refers to the other pressure-technical and dimensional advantages of forming a roll and removing it inside the autoclave.

A disadvantage common to all known decatting methods results from the web material used as a tread, the width and length dimensions of which must correspond to the textile fabric to be decatted. The tread is exposed to high pressures and temperatures as well as to moisture and residual chemicals, in particular carbon acids, reducing agents, surface fixatives and the like, which are generally detrimental to the tread. Make your tread at least. Holds durability for a limited period of use, valuable fabric is used. This is not only costly, but is also burdened with other disadvantages. In order to meet the mechanical and chemical requirements, the tread has to be made robustly, so it is relatively thick and has a correspondingly high basis weight. The T-1-tab-and-tread supports undesirable characteristics on the fabric to be decattered and also causes overheating, which can cause unevenness in the processing result. Finally, the tread thickness also limits the capacity of the decatting autoclave for the textile fabric to be processed.

SUMMARY OF THE INVENTION The object of the invention is to improve the decatting method of the kind described above so that it can be carried out more economically in comparison with conventional decatting methods. this also enables qualitatively better processing results.

Badat a t a n y n 'ex.u.

To solve this task, the conventional decatting method mentioned in the feature was used. claim 1 and according to the feature of claim 1 according to the invention, it has been proposed to use as a tread a flat fabric consisting of non-oriented fibers whose basis weight is less than S0 g / m ¹ and whose water vapor permeability is not less than 3.500 g / m ¹ / 24 h.

The fabric used as a tread by the process of the invention may, for example, consist of a cheap thin fiber web, which is made of synthetic polypropylene or polyethylene fibers or the like, the fibers being bonded together according to the type. needle felts or also by chemical or thermal bonding. What matters is the low basis weight of the tread used and its good water vapor permeability. On the other hand, high mechanical strength can be dispensed with, since the low cost of tread production allows to replace it with a new tread even after low tread usage. As a tread suitable, inexpensive, commercially available sheet material is recyclable and can be ^! thus also repeatedly processed into new tread material.

According to one embodiment of the method of the invention, the fabric with a residual moisture content of from 10 to 100 wt. 7. wound on a perforated cylinder and in this state is subjected to heat treatment.

A particular advantage of this method is that the woven fabric to be woven for decatting does not require any intermediate drying after dyeing and prior to the decatting process, but must only be squeezed to the desired residual moisture. With conventional treads, on the other hand, intermediate drying is necessary because the high tread thickness of the damp fabric causes overheating.

Finally, an embodiment of the method according to the invention assumes that the residual moisture required each time during the treatment of the textile fabric contained in the autoclave is maintained and controlled by external steam supply.

In order to emphasize possible qualitative improvements by the method according to the invention over the conventional method, the following experiments have been carried out:

1. 1.6 in. Wide combed yarn fabric. Of pure wool weighing running meter 28 (2 g / m and corresponding basis weight 280 g / m: 6 m = 175 g / πΛ) was decatted when used a conventional tread having a basis weight of 440 g / m @ 2

2. Such a worsted yarn fabric was decatted under otherwise unchanged conditions using a tread, ...

of woven fleece with a basis weight of only 18 g / m.

In both decatting processes, the combed yarn fabric was always stored in a dry state in a decatting autoclave. During the decatting process, both the decatting processes consistently added 100 wt. 7. steam.

Examination of the fabric test decatted using a conventional tread (test I) and the fabric test decatted according to the method of the invention (test II) gave the following mean values for the following parameters:

A. Kawabat Handle Determination

Tuhost'v bending in jJNm exam AND: warp Wed, hrs x 7.40; stand. deviation s 0.298 escape ”Χ 5.89;  with 0.249 exam if: warp IJ X 7.01; 41 with 0.346 escape  X 6.23; ”P 0.277

2. Hysteresis size test I:

average warp

Escape Exam II:

bending weft warp in mNin / m: ·: 0.233; stand.

x 0.131;

x 0.230;

x 0.197;

deviation s 0,0444 with 0,0300 with 0.0524 with 0,0272

Shear stiffness in N / m rad exam I: stand. deviation with 2.0 warp hrs x 41; escape if ft 40; “S 1,4

exam II:

warp x 2 ^: " s 0,7 escape 11 ÍV 11 5 1, 'S

Size and bone hysteresis in shear exam AND: warp hour hours μ 0.6; escape  x 0.5; exam II: warp : · 0.4; escape  x 0.4; Size and bone hysteresis in shear exam AND: warp h x 1.5; escape  x 1.4;

at 0.5 * in N / m stand. deviation with 0.01 "s C \, 09

S, 0.04

Ξ 0,03 at 5 ° in N / m s 0,02 s 0,05 stand. deviation ® 16

0.6;

with

0.02

0,02: exam II:

Outline Escape

6. Highest ductility at 500 cN / cm at 7.

exam I:

warp times x 3.7;

weft x 5.7;

stand. deviation with test II:

Outline Escape

6.7;

7.9;

0.19

0.10

0.28

0.50

7. Tensile work in J / m test I:

warp x hr 6.6;

weft x 9.6;

exam II:

warp x 9.6;

ut e k x 11.4;

stand. deviation s

0.28

0.10

0.22

0.47

S. The ability to recover in 7.

exam I:

syllabus pg x escape x exam II:

OSN ''.

66; stand. deviation s

67;

1.1

0.7

0.4

0.3 weft

II'67; ·

9. Linearity test I:

osnova etř. throw.

Escape ¹¹ Exam II:

Outline Escape

0.74; stand. deviation with 0.014

0.69; "S 0.011

0.58; s 0.012

0.59; "S 0.013

B. Dropping test I:

hour

zkouška II;

0.756; stand. deviation with 0.012

0.690;

s 0,026

C. Gloss Factor Test I:

hour

exam II:

1.38; stand. deviation with 0.00

1.25;

D. Thickness and compressibility

1. Thickness at 2 cN / feel test I:

h x 0.391; stand. deviation. s 0,004 exam II:

x 0.502; with 0.006 o

in.*

Thickness at 20 cN / cm ¹ · Test I:

hour; ·; 0.329;

exam II:

>: 0.391;

stand. deviation s

0.005

0.001

Absolute compressibility.st in · mm test I: 0.062 (comparison of the mean value feasible) ´ test II: 0.111 (comparison of the mean value feasible)

Relative compressibility at 7, test I: 15 (comparison of feasible mean) test II: 22 (comparison of feasible mean)

Surface squeeze according to Aku-test

Sign immediately after release exam I: 2 exam II: 4 is not is not is not

Grading after 1 hour recovery exam I: 5 exam II: 6-7

3. Mark after 2 hours recovery test I: 6 test II: 7

St

The exam The exam The exam after 24 hours recovery

I: 7-8

II: 7-8 (grades 1 to 8: worst for grade 1 and best for grade 8)

F. Mobi's Nobi Suit and Solubility in '

(as a measure for chemical changes) Test I: 42.2 Test II: 45.5

Thickness measurements were made in accordance with DIN 5385 moč and urea-bisitic solubility according to IWTO (Internátianal

Wool Technical Organizations on) 11-64.

Surface crushing was performed with the support of the Aku method (cylindrical crimping method) with 3.5 kg load weight and 25 min load time.

All tests were carried out in a normal climatic environment.

A comparison of the mean values of the test results shows that a surprising improvement in the quality of the textile fabric in a variety of directions is achievable by the decatting method of the invention.

Represented by:

CJ. & '{

Claims (3)

PATENT CLAIMS A method of debating a wool fabric or a fabric made using a substantial proportion of wool fibers, wherein the fabric is rolled together with a tread on a perforated 'roller' roller and the coil so formed is subjected to heat treatment in an autoclave, characterized in that tread is a planar formation consisting of non-oriented fibers, the basis weight of which is less than 80 g / ίΐΛ and whose water vapor permeability is not ♦ ♦ less than 3500 9 / ίτΛ / 24 h. Method according to claim 1, characterized in that the fabric is wound on a perforated decatting roller with a residual moisture content of 10-100 wt. 7. and in this state is subjected to heat treatment. Method according to claim 1 or 2, characterized in that the residual moisture of the textile fabric present in the autoclave is maintained and controlled by an external steam supply during each treatment time. Represented by: