LT3032B - Method for treating of denim and various cotton fabric - Google Patents

Abstract

Invention applies to the textile industry, in particular to the finishing methods of denim and other cotton fabrics, in effect to make them look like rubbed or faded articles. The invention aims to make the process less complex, save expenditure and prevent environmental pollution. Denim (or other fabrics) using this method is put through a polishing machine that has polishing shafts covered with a polishing abrasive material of 10-50 roughness, shafts rotate in a single direction at a speed of 800-1,000 revolutions per minute and the fabric moves at a speed of 2-5 m per minute.

Description

The invention relates to the finishing of textile products, more particularly to the production of a steamed or deleted image in denim.

: 5 Known way. to give the product an erased, worn-out appearance7 by means of a sandblast using a special sand blasting apparatus {see / EP 0263.498,

D 06LD 28/00 _f 11/00, 13.04.1988).

· There is also a known way of treating .jeans by giving them

7 / j, worn out, appearance / washing / cloth in alkali solution (see application Big Bitumen No. 2136029 D 06 L 1/12, 84.09.12).

The above / listed ways / dash / low throughput and high effluent contamination. '' 7/7

EP application No. 0259948, D 06 C / 27/00, 88.03.16, was selected for the present invention. It contains denim for the purpose of obtaining a worn image, is treated with a slit, and then polished. Before grinding, a portion of the grinding material is removed by washing the material with a mixture of phosphoric acid ethers at 64-120 ° C. Then rinse, again. Wash two bold sleeves on it to form fluff. The material is then dried, refined and polished.

/ 7 This N treatment process is long / labor-intensive / product-intensive and reduces the material's strength and texture (softness). \ '

The object of the present invention is to simplify the process, to increase power / economy and to increase the strength and softness of the fabric. 7f '7 · 7' $ 7 ^ν

For this purpose, in the known process of grinding material by passing it through the grinding flags', '';

coated with abrasive material, the shafts e are rotated in one direction at a frequency of 800-1000 min ' ¹ , the velocity of the material is 2-5 m / min., and the abrasion of the abrasive material is 10-50 pcs.

In order to obtain a more varied pattern, the abrasive may be patterned with varying degrees of abrasion,

The following examples illustrate the method: ·

Fig.l. Denim article by Indigo 997, passed through a special machine MH-1800 at a speed of 2 m / rnin and a spindle speed of 700 min ' ¹ , with abrasive material abrasive of 4Ό.

The resulting effect is determined visually.

The effect of softness, n ^ but for the sake of clarity; 5 b / beer · scale versus raw material.

The strength of the treated material was determined according to GOST 3813-72. · '·

Figure 2. The test was performed as in Fig. 1, and we varied the rotational speed of the grinding rollers, the speed of movement of the material and the coarseness of the abrasive (see table).

Fig. 3. Performed by prototype. Material art '. Indigo 997 is treated in a stretched form with DAB-2 phosphoric acid ethers; 0.5%, passing the material through 6 rotating baths, the temperature of the first 70 ° C and the last one at 120 ° C. The material was then rinsed and re-washed twice sleeve, temperature 80 ^c C, time 20 min and at? 65 ° C - 15 min. Next we dried the material in a tense state in a drying oven.

The dried material was treated with a softener Marvelan SF (VFR). During this treatment, due to the warp '''••: / <.?:;.;<Sxis ± txa £ ikim0 _r ''the material surface becomes curved. The material for breaking and removing these loops is passed through a sanding machine which grinds. shaft speed 50 m / min.

• Testing of treated material is performed as in Method / 1.

Needed; note that, compared to the prototype, the 'treated' material not only acquires a good image of the deleted product, but is / soft-treated 'dry', and / disintegrated / surface fibers give a chamois appearance. Meanwhile, according to the prototype, the material is being processed

In the 15d urethra, the material shrinks, / / ± softness.

Processing mode selected optimal to get 'j: ;; //; _; ^ kok ^ Looking ;.woven ,;

. ²⁰ '. · / Shumajihuna grinding shafts rotation speed <700 min ^-1 · results in' poor quality product / appearance due to excessive lengths of material on the surface which can subsequently peel. Increasing the speed> - 1000 min ^-1 causes / the opposite effect, which reduces the softness of the product.

The material's speed of movement is also selected for optimum. Decreasing / moving speed <2 j 0 m / min decreases performance, producing the same quality / / Increasing speed> 5 m / min decreases. deletion effect.

Abrasive roughness is also selected with respect to /; obtaining the desired effect.

Too little roughness erases the material too little and the / '//' / effect is blurred.

Increased abrasive coarse > 50 leaves long broken fibers _,; which give an uneven image and can cause peeling.1 y 5 The shafts / movement must be in one direction, otherwise the fibers are disposed in one direction which degrades the exterior effect of the chamois.

The strength characteristics given in the table below show that the material treated with the proposed process has good strength characteristics.

Compared to the prototype, the novelty of the proposed method is that it does not have a long, demanding en. the cost of pretreatment, material treatment, to create fibers, loops on the fabric surface.

Common features with the prototype, grinding, but in the prototype, the purpose of grinding is different, i.e. remove the loops formed on the surface of the material, which causes the material to pass through the grinding machine at high speed. In the meantime, in the proposed method, sanding is performed to lift the fibers and remove some of them by providing: fabric. double effect image of the erased and soft suede product.

The most important distinguishing feature of the prototype is that the denim is immediately, without further processing, as in the prototype,. passes through a grinding machine at relatively low material velocity and high rotation speed of the grinding shafts, which gives the material a good effect of the erased, ^n- vaporized type, and at the same time provides a soft, chamois appearance to the material surface.

-7 · a

The proposed process has an average throughput of 4 m / min, whereas a prototype requires 1 m of fabric with this effect to take at least 25 min.

Thus, the proposed method reduces processing time by 20-25 times, reduces energy consumption by 5-7 times, due to: the need for pretreatment ^; also / saves material for fabric softening by adding]: 'S iūl Omo; advantage is et al, '> it (using' pollute the environment, because there is no wet-chemical reprocessing, .as e. prototype to the same, and 7? / ^increased]; / material strength.

Claims (2)

1. Jeans. and the method of treating various cotton fabrics, !; where the material is sanded by passing it through 5 abrasive / yyChildren, yy y coated with abrasive abrasive, characterized by the fact that the shafts are rotated by one _? direction at frequencies from 800 to 1000 min ^-1 , and the material has a flow rate of '2-5'. m / min, the abrasive material abrasive roughness is 110-50 units. ¹⁰ -, 2. The method of claim 1; b e sils a n d i n g i n g that; that the abrasive material 'may have a pattern and different abrasive coarseness,