CS197985B1 - Raw jute processing method in textile industry - Google Patents

Description

The invention relates to a method of using a new type of lash emulsion intended to soften raw jute prior to spinning. The emulsion contains as active ingredient partial esters of higher unsaturated fatty acids with polyhydric alcohols.

The scour emulsion is commonly used in the process by treating raw jute in the textile industry. The raw jute is sprinkled with a lard emulsion, then left to rest and steam for several days. The jute fibers soften, soften and remove wood more easily with the scouring emulsion. Up to now, the raw jute was scoured with an emulsion prepared from treated cough oil, mineral oil, suitable emulsifier, gooey soap, soda and water.

The scouring oil commonly used so far has been cough oil, which is obtained by suitable treatment of sperm oil from sperm. The occurrence of aperm oil has recently been greatly limited in the world by the great loss of sperm whales and their defense. A scouring process is essential for the processing of raw jute. Therefore, the new type of lash emulsion containing partial esters of higher unsaturated fatty acids with polyhydric alcohols as an active ingredient is of great importance because it addresses raw jute processing technology independent of the import of hitherto traditionally derived raw materials derived from semen oil.

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The new lash emulsions solve the worldwide problem of scarce epermax for a special case of use in jute processing technology. When using a new emulsion, the jute processing machinery remains unchanged. A considerable advantage of the new scouring emulsion is its superior efficiency over the traditional type of scouring emulsion with oil-based oil. This higher efficiency is favorably influenced by the content of higher fatty acid partial esters of polyhydric alcohols, which are characterized by a stronger bond to the jute fiber compared to the kaelot oil and which allow a lower concentration in the emulsion to provide softening, softening and desired jute fiber treatment for further processing textile industry. This results in a reduction in the consumption of the active ingredient of the bull emulsion with the same effect

The advantage of the composition of the new lace emulsion is the use of a domestic raw material for the preparation of the lace emulsion against the treated cone oil, for the production of which semen oil is imported for foreign exchange.

Partial esters of higher unsaturated fatty acids with polyhydric alcohols are carried out either by direct esterification of fatty acids using conventional esterification catalysts, or by alcoholysis of the corresponding natural triglycerides (e.g., vegetable oils) using alkaline catalysts or by using free fatty acids as catalyst. Both reactions ee are carried out at temperatures of 180 to 250 ° C in an inert atmosphere with stirring.

Vegetable oils, preferably rapeseed oil, refining fatty acids which are refined in the refining of vegetable oils, olein from animal fats, are used as basic raw materials containing higher unsaturated fatty acids. Among the polyhydric alcohols and used, for example, glycerol, pentaerythritol, glycol, diethylene glycol, triethylene glycol, propylene glycol, aorbit, mannitol. The composition of the partial esters of higher unsaturated fatty acids with polyhydric alcohols as reaction products of esterification or alcoholysis is given by the ratio of the feed products to the reaction.

Partial esters of higher unsaturated fatty acids and polyhydric alcohols are used as the principal active ingredient in an amount of 0.5 to 10% in a scrubbing aqueous emulsion together with other additives such as mineral oil, surfactants, greasy soap, alkali hydroxides and carbonates.

The mash emulsion ae is prepared by adding mineral oil and the active ingredient to the water, heating the mixture with stirring, adding a soap, emulsifier, soda and other ingredients and mixing at 100 ° C. After the mixture has been emulsified, the emulsion is cooled to 60-65 ° C and used to sprinkle jute on an apreader. Thereafter, the swollen jute is allowed to sit and steam for 36 to 72 hours at a temperature of 35 to 50 ° C, thereby providing the desired treatment of the jute fiber for carding, drying and spinning. The moisture content of the fibers prescribed by the standard and the use of the new method does not decrease. During the spinning process, the number of yarn breakages is not increased and the performance of the spinning machines is not affected.

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Examples of use:

Example 1

De-acidified rapeseed oil was charged to the esterification reactor and heated to 60 ° C. Then, with stirring, pentaerythritol was gradually added and the reaction mixture was heated to 220 ° C for 3 hours. 0.15 wt.% Potassium hydroxide was added as a catalyst. The working pressure was 26 kPa. Weight ratio of rapeseed oil to pentaerythritol 9: 1. The reaction time was 140 min. The reaction was carried out under a nitrogen atmosphere. After completion of the reaction, the product was cooled to 60 ° C and discharged from the esterification reactor. A mixed partial fatty acid ester of rapeseed oil with pentaerythritol and glycerol, hereinafter referred to as PRODUCT A, was obtained.

A 1000 liter boiler was simultaneously charged with 698 kg of water, 250 kg of mineral oil B 1 and 25 kg of PRODUCT A. The mixture was gradually heated to 80 ° C while stirring, and 18 kg of OL emulsifier (manufactured by Spolek pro chemical and metallurgical production, Boletice n. L., it is a sodium-ammonium soap of olein and linseed fatty acids 8 containing the active ingredient 36 56), 5 kg of gooey soap and 4 kg of soda. The mixture was then heated to 100 ° C and stirred until a uniform emulsion was formed. Preparation took 30 minutes. After preparation and emulsion, the emulsion was cooled to 65 ° C and at this temperature, under constant stirring, was ready to be dispensed as a mash emulsion.

The yarn for SS jute yarn was as follows:

kind of jute % BWA 20 May BWB 15 Dec BTB Dac. 15 Dec BWC 35 Vietnamese A 15 Dec Total 100 ALIGN!

The raw materials of this composition were blended and jute was released.

The edges were hand-clasped with a handful of 3.5 kg fibers on a hand of 1 to 1.2 kg. It was carried out on a milling machine (apreader) to mute and comb the jute with the simultaneous sprinkling of the jute with a prepared emulsion of 22% by weight of the raw material. The strands were wound into coyles. The deposition and steaming of the swollen jute was carried out for 60 hours, a jute temperature of 40 ° C was reached within 48 hours, and after 60 hours 45 ° C. The carding was carried out on rough and fine carding machines. Assessment took place on 3 drawing machines, I. passage was gross, II. middle passage and III. fine passage. The filament was spun on wing spinning machines with a set machine division of 107.95 mm, with a stroke of 165.10 mm at the size of used bobbins 76.20 x 165.10 mm. The yarn number 240 tex, ie 4.2, was spun. The spun yarn was wrapped on cross, conical spools on

197 98S winding machines.

The resulting SS jute yarn showed a strength in the range of 210 to 430 grams, an average strength of 325 grams, a moisture value of $ 16.29, a market distance of 12.26 km, and a quality class.

Example 2

The esterification boiler was charged with olein and triethylene glycol at a weight ratio of 8: 2. The mixture was heated to 230 ° C. After addition of p-toluene sulfonic acid as a catalyst in an amount of 0.6 wt. at an operating pressure of 13 kPa, the reaction was carried out under continuous stirring, esterification for 120 minutes. The reaction was carried out under an atmosphere of carbon dioxide. After completion of the reaction, the reaction mixture was cooled to 70 ° C, the bottom layer containing unreacted triethylene glycol was drained, and the product was discharged from the etherification boiler. A partial ester of higher unsaturated olein fatty acids (predominantly palmitoleic acid, oleic acid and linoleic acid) and triethylene glycol, designated below as PRODUCT B, was obtained.

Into a 1000 l boiler, 695 kg of water, 245 kg of mineral oil B 1 and 27 kg of PRODUCT B were simultaneously charged. The mixture was gradually heated to 70 ° C with stirring and 10 kg of KDE emulsifier (manufactured by Severočeské tuková) were gradually added. it is a condensation product of fatty acids of coconut or palm kernel fat, formaldehyde and diglycol, acting as a non-ionic surfactant and 10 kg of Emulsifier OL (manufactured by the Association for Chemical and Metallurgical Production, Boletice n .; L); ammonium soap of olein and linseed fatty acids and content of active ingredient 36%), 2 kg of caustic soda, 2 kg of soda and 9 kg of gooey soap. The mixture was then heated to 100 ° C and stirred until a uniform emulsion was formed. Preparation took 25 minutes. After preparation of the emulsion, the emulsion was heated to 60 ° C and at this temperature, under constant stirring, was ready to be dispensed as a mash emulsion.

The composite fiber yarn for S-quality jute was:

kind of jute % BWB 7 BTB Dac. 10 BWG 33 BWD 8 Vietnamese A 42 Total 100 ALIGN!

The raw materials of this composition were mixed, the jute was loosened, the fiber jute was broken manually and Example 1. The spreader was ground and combed with jute sprayed with 20% by weight of the raw material. The strands were wound into eoyles. Steaming and boiling

197 995 of jute was carried out for 65 hours, after which the jute temperature was 41 ° C for 48 hours and 46 ° C after 65 hours. Carding and stitching were performed as described in Example 1. The fiber was spun on the wing spinning machines 8 with an adjusted machine division of 120.65 mm, with a stroke of 190.50 mm, with the spool size used being 88.90 x 190.50 mm. The yarn number 300 tex, ie 3.3, was spun. The spun yarn was blown onto the cross, conical bobbins on the winding machines.

The resulting jute S yarn showed a strength in the range of 250 to 500 grams, an average strength value of 360 grams, a moisture content of 15%, a market length of 11.14 km, and was of a quality class.

Claims (1)

Process for processing raw jute in the textile industry prior to spinning, characterized in that, for impregnation of the jute, a mash emulsion containing 0.5 to 10% by weight of active ingredient is used. C12 to C22 unsaturated fatty acid partial esters of polyhydric alcohols having a carbon number of 2 to 8, preferably 1 to 3% of rapeseed fatty acid partial esters of rapeseed oil with pentaerythritol, glycerol or triethylengly around and other conventional ingredients such as eg mineral oil, surfactants, soap, alkali hydroxides and carbonates and water, in an amount of 10 to 30% lash emulsion by weight of the raw material, and jute mating and steaming prior to carding, drying and spinning for 36 to 72 hours at 35 ° C. 50 ° C.