Fur fell soak process

FIELD: fur industry.

SUBSTANCE: fur fells are treated with aqueous solution of nonionic surfactant and antiseptic, which is aqueous dispersion of acrylic copolymer with dimethylformamide at ratio (1.0-1.1):(5.0-5.1), respectively.

EFFECT: improved physico-mechanical characteristics of fur fells and improved environmental condition.

1 tbl, 2 ex

 

The invention relates to light industry, namely the fur, and may be used during the process of soaking the pelts.

A method of processing fur sheepskin by soaking, degreasing, pickling, tanning, fatliquoring, etc. this : soaking off exercise composition containing sodium sulfite, sodium silicofluoride and nonionic surfactant (nonionic surfactants) (see, for example, processing Technology fur sheepskin, Createrepo., M., 1988).

The disadvantage of this method is the use of toxic sodium fluorosilicate preparation.

The closest in technical essence and the achieved result is a processing method of rabbit, comprising : soaking off fresh-dried material in an aqueous solution of sodium chloride, fertilitate, sodium thiosulfate and nonionic surface substances for 18-20 h at volume ratio of the LCD 9 and a temperature of 38°, meskene, pickling, tanning and so on (see, for example, a single processing technology of rabbit, Createrepo., M., 1990, p.10-11).

The disadvantages of this method are the low stability of the hairline (EAP) skins to the action of aggressive media, low strength characteristics of the leather (CT) fur and environmental degradation of the environment as a result of processing toxic fluorosilicate preparation on the model.

The objective of the invention is the improvement of physical-mechanical and chemical characteristics of fur skins.

The problem is solved by processing of fur skins nonionic surface-active agent and an antiseptic in the aquatic environment. As an antiseptic use the water dispersion of acrylic copolymer with dimethylformamide in a ratio of from 1.0 to 1.1:5,0-5,1, respectively, in the following ratio of components, g/l:

Aqueous dispersion of acrylic copolymer
with dimethylformamide in a ratio of from 1.0 to 1.1:5,0-5,16,0-6,2
Nonionic surfactant1,8-2,0
Waterto 1 liter

Antiseptic consisting of a water dispersion of acrylic copolymer (TU 2241-031-51769914-2003) and dimethylformamide (GOST 20289-74), has antibacterial and antifungal properties. Processing furs data antiseptic increases the resistance of hair to the action of aggressive media, the most intensive razvlecheniy leather fur skins when pickling.

The content of the basic substance in water dispersion of acrylic copolymer of 48%, a particle size of 0.06 μm. Fine particle size aqueous dispersion of acrylic is about a copolymer provides deep penetration into the material being processed. Dispersion copolymer contains preservatives, it is not flammable, not explosive.

Dimethylformamide has as penetrating and antibacterial abilities.

The method of soaking fur skins is as follows.

Example 1. A : soaking off of rabbit fresh-dried conservation method.

The party of rabbit fresh-dry process the canning process in otkachnoj tub of nonionic surfactants in an amount of 1.8 g/l and antiseptic agent consisting of a water dispersion of acrylic copolymer and dimethylformamide in a ratio of 1.0:5,0 respectively, in the amount of 6.0 g/l when the LCD 9 and a temperature of 38°C for 18-20 hours

Example 2. A : soaking off skins fur dry-salted conservation method.

Party skins sheepskin fur dry method of canning process in otkachnoj tub of nonionic surfactants in an amount of 1.8 g/l and antiseptic agent consisting of a water dispersion of acrylic copolymer and dimethylformamide in a ratio of 1.0:5,0 respectively, in the amount of 6.0 g/l when the LCD 10 and a temperature of 25-30°C for 16-18 hours

This method of soaking applicable for sheepskin macromolecule conservation method when the LCD 10 and a temperature of 35°C for 2-4 hours

Further processing of fur skins carried out by known technologies.

The research results of the proposed method of soaking fur skins and indicators imicheskih and physico-mechanical characteristics of furs in the table.

As can be seen from the table, when using components in Atochem solution in amount, g/l:

Aqueous dispersion of acrylic copolymer
with dimethylformamide in a ratio of from 1.0 to 1.1:5,0-5,16,0-6,2
the nonionic surfactants1,8-2,0
Waterto 1 liter

achieved the necessary degree of watering fur skins, bacterially leather skins least, confirming that this antiseptic and antifungal properties. The fat content in the hair cover contains not more than 2%in the leather in the range of 13.0-14.2 percent. Treatment with antiseptic, the specified quantity, contributes the most intensive razvlecheniy the leather when pickling, which is good preparation for the next process of tanning. The temperature of the welding pickled fur skins lower and higher tanned fur skins. So, in the case of treatment of rabbit temperature welding of the leather after pickling is 44°With, in the case of fur 52°C. Temperature welding after tanning CT rabbit is 82-83°C, CT sheepskin 88-89°C.

Table
Otmichnii solution, g/lthe placeholderrabbitsheepskin
12345678
the nonionic surfactants2,01,61,82,02,21,61,82,02,2
NaCl20,0--------
Na2SiF60,8--------
Sodium thiosulfate5,0--------
Na2SO3---------
Aqueous dispersion of acrylic copolymer with dimethylformamide-4,06,06,27,04,06,06,27,0
Chemical and physico-mechanical properties:
Water content, %70,16073737370747475
Bacterially (min)weak (60)weak (210)weak (240)weak (240)weak (240)weak (210)weak (240)weak (240)weak (240)
Temperature welding of TStthat °
after pickle535144444555525252
after tanning757082838275888989
Cr2O3in CT, %0,740,621,171,171,170,91,411,42the 1.44
The fat in CT, %13,011,014,2 14,015,715,013,913,013,5
Ultimate tensile strength, kgf/mm21,231,11,681,691,701,151,541,531,54
Elongation, %434245454548464645
The solubility of the EAP in alkali, %9,07,47,17,07,66,66,16,06,2

Processing furs antiseptic, specified amount, contributes to greater viviremos chromium from tanning solution. Thus, the chromium content in CT fur sheepskin is 1.41-1,42%, CT rabbit 1,17%. The test results show a significant improvement of physico-mechanical properties of the leather and fur skins. Tensile strength tensile CT rabbit is 1,68-1,69 kgf/mm2, CT fur sheepskin 1,53-1,54 kg/mm2. Lengthening at the same time within test standards and 45-46%. The coat of fur skins more resistant to the corrosive environment.

When using these components in a smaller number of nab is udaetsya insufficient values of moisture content and temperature welding, worse physico-mechanical characteristics of the leather and fur skins. An increasing number of components has no significant impact on the improvement of the chemical and physico-mechanical properties of the leather and fur skins.

The moisture content of raw material is determined by drying the samples at a constant temperature in accordance with GOST 13104-77.

Determination of bacterial contamination of raw materials is carried out in accordance with the method of the qualitative and quantitative determination of the degree of damage the leather navedenih furs (water extracts) - Milligram the USSR, Nazarova, ETC, Plyusnina L.P., Korobeinikova I.N. - M, - 1988. - 7 S.

Control degreasing hair is qualitatively by the reaction Lieberman described in the workshop on chemistry technology of leather and fur authors Aggancio, Viersen, ZNIIK, 2002, p.57-58.

Quantitatively the residual content of fatty substances in the leather is determined according to GOST 26129-84 by extraction with dichloroethane.

Viviremos tanning material from a solution by measuring the optical density is determined using a photoelectric calorimeter brand CPK-2 in accordance with GOST 21119.5-75.

Determining the temperature of the welding is made according to GOST 938.25-73 on a special device.

The content of the oxide of chromium in the leather is determined by the photo is colorimetrically method in accordance with GOST 9212-77.

Physical-mechanical tests of fur skins are carried out according to GOST 22596-77.

Determination of solubility of hair in acid and alkali is determined according to the method described in the laboratory of chemistry and technology of leather and fur authors Golovteev A.A., Cutside D.A., Sankin LB, Light and food industry, 1982.

The advantages of this method compared to the prototype is more intense razvlechenie the leather when pickling, increase viviremos chromium from tanning solution, the temperature of the welding fur skins, the limit is increased, the tensile strength leather and sustainability of the hair to the action of aggressive media, as well as reducing the environmental load on the environment by reducing the chromium content in the effluent and exceptions toxic fertilitate sodium.

The method of soaking fur skins by treating them with nonionic surface-active agent and preservative in an aqueous medium, characterized in that as an antiseptic use the water dispersion of acrylic copolymer with dimethylformamide in a ratio of from 1.0 to 1.1:5,0-5,1, respectively, in the following ratio of components, g/l:

Water dispersion of acrylic
copolymer with dimethylformamide
in the ratio to 1.0-1.1:5,0-5,16,0-6,2
Nonionic surface-active
substance1,8-2,0
WaterTo 1 l



 

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FIELD: fur industry.

SUBSTANCE: fur fells are treated with aqueous solution of nonionic surfactant and antiseptic, which is aqueous dispersion of acrylic copolymer with dimethylformamide at ratio (1.0-1.1):(5.0-5.1), respectively.

EFFECT: improved physico-mechanical characteristics of fur fells and improved environmental condition.

1 tbl, 2 ex

FIELD: fur industry.

SUBSTANCE: invention is directed to processing fur sheepskin intended for manufacturing clothing, headgears, footwear parts and other fur items. Crude fur sheepskin of all preservation types is subjected to soaking, first degreasing, squeezing, haircutting, and fleshing according to known technology. Then fur sheepskin is subjected to additional processing in aqueous solution of sodium chloride (15-20 g/L) and nonionic surfactant composition (1-2 g.L) for 2-6 h at 30-32°C. After second degreasing and washing, pickle salting is carried out for 20-24 h. 4-6 hours after the beginning of pickle salting, processing solution is supplemented by 3-5 g composition of nonionic surfactants (1:1 mixture of Neonol AF 9-12 and syntamide 5). Finally tanning and greasing are performed.

EFFECT: improved performance characteristics fur sheepskin intermediate product.

2 cl, 1 tbl, 5 ex

FIELD: textile industry.

SUBSTANCE: method involves water intrusion and boiling of samples of leather fabric. During water intrusion the increase in thickness of leather fabric samples is determined by boiling. Leather fabric samples are measured during water intrusion by means of thickness gauge before boiling and after boiling. Thickness increase of samples is calculated in percents. If thickness of samples increases by more than 50%, leather fabric is subject to mechanical treatment, and namely to scouring.

EFFECT: invention allows determining thickness increase of leather fabric in percents at boiling and based on this the water content which is enough to perform scouring.

3 ex, 1 dwg

FIELD: process engineering.

SUBSTANCE: proposed method comprises raw stock soaking, washing, shearing, fleshing, deoiling by water solution in the presence of anionic surfactant at 42°C, "ЖК" 7, pickling and tanning-oiling by water composition containing sodium chloride, chromium tanning agent and fat emulsion. Proposed composition comprises additionally the mix of nonionic surfactant and chloride alkyl dimethyl benzene ammonium at the ratio of 60-70:30-40 in amount of 0.5-1.0 g/l. Note here that processing is performed for 70-90 min. Composition for tanning-oiling comprises the mix of nonionic surfactant and isopropanol at the ratio of 90:10 in amount of 0.5-1.5 g/l while oiling agent ''Talis'' is used in amount of 4-5 g/l.

EFFECT: higher operating properties.

1 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: method of treating leather material, which involves successive two-step soaking with a surfactant-based composition, liming, deliming, softening, pickling and tanning, wherein at the first soaking step, at the second soaking step, as well as at the liming step, the composition used contains surfactants in form of a product of condensation of float tar with triethanolamine, taken in molar ratio (0.8-1.2):1.0, sodium alkylbenzene sulphonate and neonol with average degree oxyethylation 12, water and isopropyl alcohol, also employs sodium carbonate, sodium sulphide and calcium hydroxide depending on the step. All components are taken in a defined ratio.

EFFECT: invention improves quality of material, reduces concentration of toxic sulphides in waste water, enables to use domestically produced chemicals, including oleic acid production wastes, thereby reducing the cost of the process of treating leather material.

2 tbl, 3 ex

FIELD: technological processes; fur production.

SUBSTANCE: invention can be used in processing of ship-fur and down and fur, primarily beaver hides. Fur stock is subjected to soaking, wet crushing, fleshing, degreasing, washing, stepped pickling, tanning, drying, breaking down, greasing, ageing, crushing, haulage, drying, grinding. Pickling and tanning of fur stock is carried out in an aqueous solution containing silver and copper citrate. Silver and copper content is 225-275 mg/dm3, and solution is used in concentration of 8-12 ml/l. Proposed method increases ultimate tensile strength of leather fabric under tension by 3.5 %, elongation at break by 8 % and elongation at load of 9.8 MPa by 16 % on average, which increases utilisation of this type of fur and improves shaping of designed furs.

EFFECT: method provides prolonged storage of fur semi-finished product in medium of contaminated by microorganisms and mold, and use of silver and copper citrate during dressing has decontamination action on waste water, which improves environmental safety of process.

1 cl, 4 tbl

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