SU1186718A1 - Method of desizing cellulose-containing fabrics sized with starch - Google Patents

Description

The invention relates to the textile production, in particular to the technology of desizing cellulose-containing fabrics before subsequent cooking and / or bleaching. five

The purpose of the invention is to increase the resistance of tissues to abrasion.

In the solution for impregnation may include the usual target additives, such as wetting. In the examples, the known wetting agent sulfosid-31, containing, in wt.%, Is used: the sodium salts of alkyl benzene sulfonic acids 25; polyoxyethylene glycol esters of synthetic fatty acids of the C _(0- C _{) b} 70 fraction; BA antifoam 5.

Example 1 (known). Surovchyu calico (. Art 274) containing starch shlihturasshlihtovyvayut February 20 h at 70 C ^th, module 1:40, pH 7.1 in an aqueous bath containing, g / l:

Pancreatic amylase preparation (diaferman A) 5.0 Sodium dithionite 1.0 Sodium salt of nitrylacetic acid 1.5 Sodium bisulfite 0.5 Sodium sulfite 0.5 After 2 hours, the fabric is washed and

impregnated with an aqueous solution containing, g / l:

35% peroxide .35

hydrogen 20.0 Sodium hydroxide oh oh Sodium silicate 5.0 Magnesium salt these pentamine tetra- 40 acetic acid 3.0 Oxyzlating nonylphenol 3.0 ^: Then squeeze, steam in an atmosphere.

The ferrum is saturated with steam at 45–98 ° C for 2 h and washed with hot and cold water.

Bleached fabric has 950 cycles of abrasion resistance. The dressing is absent, the whiteness is 83.1%, the specific viscosity 50 is 1.82.

Example 2. Severe calico (art. 274) containing starch

/ GO / P

dressing, impregnated at 45 With an aqueous solution containing, g / l: 55

Caustic soda 3.0

Sodium sulfide 4.3

Drug sulfosid-31 0.5

Then squeeze, steam in an atmosphere of saturated water vapor for 30 minutes, washed with hot and cold water, acidified with 5 g / l of an aqueous solution of sulfuric acid, washed with cold water 'and impregnated with an aqueous solution containing, g / l:

100% hydrogen peroxide 3.5

Sodium silicate 9.0

Caustic soda 2,5

The drug sulfosid-31 0.5 Then steamed in an atmosphere crust;

water for 30 minutes and washed with hot and cold water.

Then they are squeezed, kept at 25 ° C for 120 minutes, washed with warm water and bleached under conditions similar to those described in Example 1.

Bleached fabric has an abrasion resistance of 1,150 cycles. The dressing is absent, whiteness 83.0%, specific viscosity 1.85.

Example 3 (comparative).

In the composition of the impregnating solution using another well-known reducing agent - bisulfite. Severe, containing starch dressing, cotton-symblon sateen (art. 629) with an investment of 33% high modulus viscose fiber is impregnated at 60 ° C with an aqueous solution containing, g / l:

Sodium hydroxide 60 Sodium bisulfite 2.0 Sodium silicate 2.0 Drug sulfosid-31 2.0 Then squeeze, steam in an atmosphere.

The ferrum of saturated steam for 30 minutes is washed with hot and cold water, acidified with 5 g / l of an aqueous solution of sulfuric acid, washed with cold water and impregnated with an aqueous solution containing, g / l:

100% peroxide hydrogen 3.5 Sodium silicate 9.0 Sodium hydroxide 2.5 Sulfoside preparation 31. 0.5 Then steamed in atmosphere

With steam of 30 minutes and washed with hot and cold water.

Bleached fabric has 930 cycles of abrasion resistance. The degree of removal of dressing 95%, whiteness 83.3%.

Example 4. Severe cotton-sibonovy sateen (art. 629), containing starch dressing, impregnated at 45 ° C with an aqueous solution containing, g / l:

3

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Sodium hydroxide 5.0 Sodium sulfide 6.2 Drug sulfosid-31 1.0 Then squeeze, maintained at

20 ° C for 90 min, washed with warm water 5 and carry out the decoction and bleaching in conditions similar to those described in example 3.

Bleached fabric has an abrasion resistance of 1264 cycles „!! 1x, that is absent, whiteness 83.5%

Example 5. Severe cotton-sibling cotton (art. 629) containing starch dressing is impregnated at 45 ° C with an aqueous solution containing 15 g / l:

Caustic soda 4.0

Sodium Sulphide 5.0

Drug sulfosvd-31 0.75

Then they squeeze out, “withstand 120 mI at 20–23 ° C, rinse with warm water and carry out a decoction and bleaching under conditions similar to those described in example 3„

Bleached fabric has resistance to abrasion for 1210 cycles.

No dressing, whiteness 83.7%

Example 6. (comparative). A harsh cotton fabric percale (Art. 7011 “a”) containing starch-containing sizing is impregnated at 60 ° C with an aqueous solution containing g / l:

Sodium hydroxide

Sodium silicate

Sodium bisulfite

Sulfosid-31

Then squeeze, steam for 90 minutes in an atmosphere of saturated water vapor and wash with hot and ₄ θ

cold water.

Boiled tissue has a resistance to abrasion. 1147 cycles. The degree of removal of dressing 75%.

Example 7. Severe fabric 45 percale (art. 7011 "a"), containing starch dressing, is impregnated at 45 C with an aqueous solution containing, g / l:

Caustic soda 5.0 50

Sodium Sulphide 6.2

Drug sulfosid-31 0.5

Then squeeze, incubated at 20 ° C for 360 minutes, washed with warm water and boiled. 55

Boiled tissue has an abrasion resistance of 1442 cycles, no dressing.

35.0

2.0

3.5

0.5

35

Example 8 (comparative). Severe fabric percale (art. 7011 "a") containing starch dressing is impregnated at 90 C with a solution containing, g / l:

Caustic soda 180.0

Sodium bisulfite 5.0

Drug sulfosid-31 5,0

Then squeeze, steam for 15 minutes in an atmosphere of saturated water vapor and wash with hot and cold water.

The fabric has an abrasion resistance of 1770 cycles. The degree of removal of dressing 80%.

Example 9. The severe fabric percale (art. 7011 "a") containing starch dressing, impregnated at 45 ° C with an aqueous solution containing, g / l:

Caustic soda 5.0

Drug sulfosid-31 0.5

Sodium Sulphide 6.2

Then squeeze, incubated at 25 ° C for 360 minutes, washed with warm water, boiled and mercerized, as in Example 8.

The fabric has abrasion resistance 2254 cycles, no dressing, specific viscosity 2.01.

Example 10 (comparative). Severe cotton lavsan fabric "Flute" (art. 975) is impregnated at 45 ° C with a water solution containing, g / l:

100% hydrogen peroxide 10.0 Sodium silicate 22.0 Sodium hydroxide 4.0 Sulfosid-31 2.0 Then squeeze, steamed in

The atmosphere is saturated with steam for 60 minutes and washed with hot and cold water.

Bleached fabric has an abrasion resistance of 1021; .Ikl, whiteness 84.5%, degree of dressing removal 93%.

Example 11. Severe cotton-cotton fabric "Flute" (art. 975), containing starch dressing, is impregnated at 45 ° C with a solution containing, g / l:

Caustic soda 5.0

• Sodium Sulfide 5.0

Drug sulfosid-31 0.5

Then squeeze out

at 20 With 20 min., washed with warm

five

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water, and bleaching is carried out, similarly to the example of MOT.

Bleached fabric has an abrasion resistance of 1350 cycles, no dressing, whiteness 84.8%. Example 12 (comparative)

washed with hot and cold water. Bleached fabric has an abrasion resistance of 1510 cycles. The degree of removal of dressing 95%,

Semi-linen fabric (art. 05205), y * Example 13. Semi-linen containing starch dressing, pro. _ about fabric (art "05205) containing feed at 60 ° C water solution ^ ten maximum dressing, impregnated at 45 ° C containing, g / l: aqueous solution containing, g / l: Sodium hydroxide 60.0 Caustic soda 5.0 Sodium silicate 2.0 Sodium Sulphide 5.6 Sodium bisulfite oh oh Drug sulfosid-31 0.5 Drug. Sulfosid-31 3.0 15 Then squeeze, stand

Then squeeze, steam at 100 ° C in an atmosphere of saturated water vapor for 10 min, washed with hot and warm water, impregnated with an aqueous solution containing, g / l:

Sodium chloride (based on active chlorine) 15.0

Monoammonium phosphate 8.0

Sodium Nitrate 0, 3

100% hydrogen peroxide 0.5

Then steamed in the atmosphere

saturated water vapor 60 min

water Further processing of alkaline and bleaching solution are, similarly to example 12.

20 Bleached fabric has abrasion resistance 2154 cycles, no dressing, whiteness 85.0%.

Resistance to abrasion is determined on the device IT-ZM-1. Abrasion

25 samples are carried out at an operating rate of the abrasive head of 100 OBU, with a specific load on the sample of 1 kg / cm ² on a scale of 3 kg.

The result is calculated as the average of 5 measurements.

Claims (2)

The method of treatment of cellulose-containing tissue, treated with starch, including impregnation with an aqueous solution of a reducing agent, characterized in that, in order to increase the resistance of tissues to abrasion, the impregnation is carried out in a solution containing 4.36.2 / vol / occ / ohms / hectare of abrasion of tissues, the solution is impregnated with a solution of 4.36.2 / oh / o / ac / 8) / ohms / hens, which is 4.36.2 /. 0-5.0 g / l of caustic soda, after which the fabric is kept at 20-25 ° C for 20-360 minutes. § 51) P 86718 one 1186718 2