SU1151621A1 - Method of preparing sizing composition for cellulose-containing warp - Google Patents

Abstract

METHOD FOR PREPARING PSHIHTY TSELLKSHOZOSODERZHASCHIH BASES kleysterieatsiey heating starch under stirring an aqueous susp .zii comprising urea, about l m .i chayuschiys in that, in order to reduce breakage bases in weaving while reducing the consumption of starch, is first mixed 1,50-1, 75 mach. dimethylol ethylene urea 0.60, 7 mph. formaldehyde, 1.501, 75 mph. carbamide, 0.0450, 050 wt. oxalic acid and 95.75-96.35 wt.h. water, heated to 40-50 ° C, held for 50-55 minutes, and then 1.8-2.0 parts by weight are introduced into the resulting mixture. starch and a part of water are heated to 95-98 from 35-40 minutes, kept at this temperature for 34 minutes and 9.010, 0 wt.h. sulphite-cellulose (L extract, 0.7-0.85 parts by weight of urea and the rest of the water to a total weight of 200 parts by weight

Description

The invention relates to chemical technology of fibrous materials, namely to the preparation of cellulose-containing bases for weaving. There is a known method for preparing dressings for cellulose-containing basics, including mixing ingredients S1STSTY, gelatisation when heated to and keeping at this temperature, using the following ingredients, kg: Oxidized maize starch Sulphite-cellulose, 0.05 lozenge extract 3.5 Glycerin Up to 700 Water Disadvantages The method is a significant consumption of starch and a high breakage of the bases in the weaving. The closest in technical essence and the achieved result to the invention is the method of preparation of the dressing for cellulose-containing bases, according to which the aqueous suspension of starch is heated to 90 ° C in the presence of urea prior to gelatinization with stirring and worn out for 20 minutes. At the same time, the ratio of starch and carbamide can vary over a wide range of l2J. The disadvantages of this method are the high breakage of the bases during weaving and a significant consumption of starch, including due to the large glue. The purpose of the invention is to reduce the breakage of the basics in weaving while reducing the consumption of starch. This goal is achieved by the fact that according to the method of preparation of shlicht for cellulose-containing bases, including gelatinization of starch by heating while stirring its aqueous suspension, containing urea, first mix 1,501, 75 wt. dimethylol ethylene urea 0.6-0.7 ma.ch. formaldehyde, 1.501, 75 mph. carbamide; 0.045 - 0.050 ma.I. oxalic acid and 95.75-96.35 wt.h. water, heated to 40-50 ° C, incubated for 50-55 minutes, and then 1.8-2.0 wt.h. starch and some of the water is heated to 95-98 ° C for 35-40 minutes, kept at this temperature for 34 minutes, and 9.010 0 wt.h is additionally introduced. sulphite-cellulose extract, 0.70-0.85 wt.h. carbamide and the rest of the water to a total weight of 200 mach. The amount of water introduced with the starch depends on the specific conditions of production and equipment and does not affect the desired result. Dimethylol ethylene urea is introduced in the formulation of carbamol CEM. Sulphite-cellulose extract is produced according to TU 81-10-03276. Example 1 (known). At 25 C., 600 mas. Hours are mixed. water, 70 mach. starch and 10.5 mac. carbamide, stirred, introduced 600 mas. water, heated to boiling and kept stirring for 15 minutes, ep 2. When mixed .1.5 mash. carbamol CEM; 0.6 mach. formaldehyde ;: 1,5 MAH.CH. carbamide, 0.045 wt.h, oxalic acid and 96.35 wt.h. water, heat the mixture to 40 ° C, hold for 50 minutes, mix the resulting mixture with 1.8 mash. starch and 80 math. water, the resulting dispersion is heated to 98 ° C in 35 minutes, held for 3 minutes, 9.0 parts by weight are introduced. sulphite cellulose extract, 0.7 mach. carbamide and water to 200 ma.ch. Example 3. At 25 ° C mix 1.6 mach. carbamol CEM, 0.65 ma.ch. formaldehyde; 1.6 ma.ch. carbamide; 0.048 ma.ch. oxalic acid and 96.1 ma.ch. water, heat the mixture to 45 ° C, incubate for 53 minutes, mix the resulting mixture with 1.9 mash. starch and 80 math. water, the resulting dispersion is heated to 95c in 37 minutes, held for 3 minutes, 9.5 parts by weight are introduced. sulphite cellulose extract, 0.78 mach. carbamide and water up to 200 ma.ch. Example 4. When mixed 1.75 mas. carbamol CEM .0.7 wt.h. formaldegvda; 1.75 math. carbamide, 0.05 wt. oxalic acid, 95.75 ma.ch. water, heat the mixture to 50 ° C, incubated. 55 min, mix the mixture with 2.0 wt.h. starch and 80 math. water, heat the resulting dispersion to 98 ° C in 40 yins, incubate for 4 minutes, enter 10.0 bp. sulphite-cellulose extract, 0.85 mac. carbamide and water up to 200 ma.ch.

S

Physico-mechanical parameters of sanding yarn are given

in tab. one. .

Table

Table 2

Indicators of the process of weaving linen base for technical fabrics of mercury. 15182 are given in tab. 2

Breakage on the basis of, arr / min

0.36

0.32

12.1

12.3

Given in Table. 1 and 2, the data show that the proposed method reduces the breakage of the bases in the weaving while reducing the consumption of starch compared to the known 3-4 times.

Claims (1)

METHOD FOR PREPARING A STOCK FOR CELLULAR-CONTAINING BASES by gelatinization of starch by heating with stirring an aqueous suspension containing urea, characterized in that, in order to reduce the breakage of the weaving while reducing starch consumption, 1.50-1.75 wt. dimethylolethylene urea; 0.60.7 parts by weight formaldehyde *, 1.50- 1.75 parts by weight carbamide; 0.0450.050 parts by weight oxalic acid and 95.75-96.35 parts by weight water, heated to 40-50 ° C, incubated for 50-55 minutes, and then 1.8-2.0 parts by weight are introduced into the resulting mixture. starch and part of the water, heated to 95-98 ° C for 35-40 minutes, kept at this temperature for 34 minutes and an additional 9.010.0 wt.h. sulfite-cellulose extract, 0.7-0.85 wt.h. urea and the remaining amount of water to a total mass of 200 wt.h. >