Anti-microbial cellulosic fibrous material
(57) Abstract:Anti-microbial cellulosic fibrous material. Use: in various fields of national economy in the manufacture of antimicrobial spectralogic, bed linen and clothing. The inventive antimicrobial material comprises chemically treated flax fiber and contains 3 to 15 wt. % drug iteron from a mixture of complex compounds polyvinylpyrrolidone (mol.m. 20000 - 30000 and iodine with potassium iodide. Material are impregnated linen canvas in 5 - 25% aqueous solution of iteron when module 1 bath:40-50 and a temperature of 20 - 60°C for 5 to 10 minutes, wringing with the level of 60 - 70% and dried at 80 - 100°C until the moisture content of 3 to 5%. Antimicrobial activity of a material according to the method of the infected agar against Staphylococcus 14 - 22 mm, the rigidity of the material in bending 600-620 MKSM2the material has a soft feel (touch), similar to the material from cotton fiber. After five washings, the material contains 42% of the drug iteron from its original content, and after ten washings - 20%. table 1. The invention relates to textile production, namely antimicrobial fibrous materials that can be used is, the hope.Known anti-microbial cellulosic fibrous material impregnated with a composition containing a synthetic rubber SCTN based on low molecular weight polydimethylsiloxane, curing catalyst TO-10C on the basis of methyltriacetoxysilane in the amount of 5% by weight of the rubber, as the organic solvent carbon tetrachloride .The disadvantage of this material is the use of components of non-traditional chemical synthesis, as well as all finishing compositions contain an organic solvent, in particular chetyrehhloristy the carbon in an amount up to 1 wt.% remains in the modified product.Known antimicrobial material, made of cotton gauze, modified graft copolymer of low molecular weight polydimethylsiloxanes links mol. m 24000-51000, 2,0-20,0; hardener - methyltriacetoxysilane 0,4-4,0%; iodine 0.2 to 7.0 percent, the organic solvent is carbon tetrachloride-rest .Technology of production of known antimicrobial material is quite complex and the properties remain at the level of the known materials of the same purposes, and is also used toxic organic solvent.However, the antimicrobial activity of these materials is not high enough.Known use as an antimicrobial agent in iodoform complex compounds of iodine with solvents and polymeric carriers .However, the technology for producing such antimicrobial materials difficult.The closest in technical essence to the invention is anti-microbial cellulosic fibrous material (cotton gauze), modified graft polymer - sulfhydrate vinylidenechloride (PBATP) - 5.7% and containing 8.6% of iodine .However, the known material, the modified grafted polymer degrades environmental safety, besides the cost of the material itself due to the high cost of its production technology.The purpose of the invention is the enhancement of antimicrobial activity while maintaining the carcass material.This goal is achieved by known anti-microbial cellulosic fibrous material containing a fixed antimicrobial agent on the basis of iodine, and according to the invention it is made from flax fibers, and as antimicrobial agent includes preparation is e 3-15% by weight of the material.Preparation iteron has high antibacterial activity against various microogranisms. It is used as an antiseptic.The proposed antimicrobial fibrous material prepared according to the following technology.As the material for the fibrous basis using woven or non-woven fabrics of flax fiber.Preparation iteron are a mixture of a complex of polyvinylpyrrolidone-iodine (mol.m. 20000 to 30,000 with potassium iodide and contains 6-8% active iodine.Material made from flax fiber, refined technological mode of boiling Rove on the devices of type AAA.The successive stages of processing and the composition of solutions:
1. The degumming - soda ash to 7.0-18.0 g/l;
sodium bisulfite and 0.2-0.8 g/l;
sodium silicate 0.6 to 2.0 g/l;
the nonionic wetting agent of the type of 0.20-0.45 g/l;
alkalinity, counting on caustic soda 3,3-8.0 g/l;
2. Washing-solution of sodium tripolyphosphate 0.6 to 1.1 g/l for 15 min at a temperature of 65-70aboutC.- hot water for 10 minutes at a temperature of 65-70aboutC.3. Acidification - acetic acid 0.7 to 1.1 g/l for 10 min at a temperature of 45-50aboutC.4. PR is 5% aqueous solution of iteron.Then in the resulting aqueous solution is placed the required amount of base material, impregnated at a temperature of 20-60aboutC for 5-10 min, the module impregnation 1: 40-50. Then press material on rolls up to 60-70% of body weight, dried at a temperature of 80-100aboutWith to a moisture content of 3-5%.P R I m e R 1. Prepare a 5% solution of iteron, which is impregnated with 1 m2linen canvas with pod bath 1:50. Then the canvas press on rollers to a residual weight gain 60% and dried at 40aboutC for 2 hOn the similar technology made samples according to examples 2-3, shown in the table.P R I m e R 4 (ed. St. N 1513959). Cotton gauze that is modified by grafting-alpherafinancialservices (PLATM), process management 20% aqueous solution, then wring out to gain 95% , dried, and then treated with 10% aqueous solution of hydrogen peroxide when the module baths 40:1 for 5 min, press again to gain 95% and dried.Modes of production and properties of the material according to examples 1-4 are presented in the table.Testing of antimicrobial activity of the material carried out by the method of "Infected agar on a standard strain of Staphylococcus 209, determining the i.i.d. data table follows, what antimicrobial activity of the proposed material has increased from 14 to 22 mm at the concentration of active substance in material 0,03-0,15% instead of 8.6% prototype. Moreover, the material acquires a carcass characteristic of the cotton fiber, the rigidity they are essentially the same, which is important for the manufacture of bed linen and clothing. Anti-microbial CELLULOSIC FIBROUS MATERIAL containing a fixed antimicrobial agent on the basis of iodine, characterized in that it is made from flax fibers, and as an antimicrobial agent contains the drug iteron from a mixture of complex compounds of polyvinylpyrrolidone and iodine with potassium iodide in an amount of 3 to 15% by weight of the material.
SUBSTANCE: invention can be used as fillers of composite materials of structure, heat protecting, anti-electro-static purpose and also at production of carbon fibrous adsorbents, catalyst carriers, materials for protection from electro-magnetic radiation, nano structured composite, fullerenes, nano tubes etc. The procedure consists in impregnation of a source unidirectional braid with solution of fire retardant. Braid is made of hydrated cellulose fibres with fine crystal non-tensioned structure with diametre of filament from 8.5 to 15 mcm at its linear density 0.07-0.17 tex. Further, the procedure consists in drying, non-oxidation stabilising carbonisation and graphitisation. As a fire retardant there is used water solution containing 150-200 g/l of ammonia chloride and 10-30 g/l of urea or water solution containing 250-300 g/l of ammonia sulphate and 20-40 g/l of urea. Drying is carried out by electric heating at 120-140°C during 30-60 min. Before carbonisation braid is treated in oxygen containing atmosphere at 140-180°C during 30-90 min. Multi-zone carbonisation is performed in current of inert medium at rate 2.5-4.5 m3/hour during 40-80 min for 5-10 min in each zone with shrinkage of source hydrated cellulose fibre at 10-30 % and at temperature from 170-230°C to 690-710°C. During carbonisation products of pyrolysis in a zone of their highest release are withdrawn due to a low excessive pressure of neutral gas of 120-150 mm of water column at continuous oxidation in spots of combustion. Graphitisation is carried out at 1000-2400°C in medium of nitrogen or argon with contents of oxygen not over 0.001% at rate of drawing 15-50 m/hour.
EFFECT: reduced duration of process, considerable reduction of humidity of produced carbon fibre, multi-zone carbonisation with guaranteed maintenance of uniform temperature of each zone, reduced release of amorphous carbon as product of resin decomposition and prevention of its settling on surface of produced carbon fibre.
7 cl, 2 ex
FIELD: chemistry; production methods of composition for thread coating.
SUBSTANCE: composition includes x) = 10-50 mass.% of polyethylene wax with melting temperature from 110 to 150°C, y) = 10-50 mass.% compound ether compositions of conjoint polymer produced from α-olefine containing from 10 to 24 carbon atoms and unsaturated dicarboxylic acid selected from maleinic acid, fumaric acid, itaconic acid and citraconic acid z) = 100-(x+y) mass.% of silicon oil composition with 100 to 100- MPa-c viscosity at 20°C. Threads, fibres or filaments produced by spinning, stretching and texturing, if necessary, are subject to treatment with the specified composition.
EFFECT: items are ensured with high resistance property.
17 cl, 2 tbl, 3 ex
SUBSTANCE: invention relates to production of absorbing nonwoven products and deals with substrate, containing foamed useful agents, and method for thereof obtaining. It includes fibrous cloth and layer of useful agent, wherein useful agent is selected from additive composition, intensifying component and their combinations, with useful agent being in foamed condition and fixed on the surface of fibrous cloth as a result of creping. Method for creping nonwoven substrate includes the following stages: (a) provision of presence of nonwoven substrate; (b) placement of applicator near hot impermeable drying surface; (c) application of aqueous foamed useful agent on drying surface by means of applicator; (d) formation of adhesive film on drying surface by foamed useful agent; (e) direct fixation of nonwoven substrate with adhesive film, located on drying surface; and (f) scraping of fixed nonwoven substrate and adhesive film from drying surface.
EFFECT: invention provides creation of method for application of additive composition as such, or in combination with softness-intensifying particles, on the surface of drying device and finally, on substrate in order to achieve substrate with increased softness.
20 cl, 17 dwg, 17 tbl, 10 ex
FIELD: textile and paper.
SUBSTANCE: invention relates to absorbent nonwoven products and concerns a substrate, containing foamed useful substances. Nonwoven substrate comprises a fibre cloth, which determines the surface, and a layer of the useful substance. Useful substance is an additional composition. Useful substance is foamed and is connected with said surface of the fibre cloth by means of the creping process so, that the additional composition on said substrate forms the surface, which is more similar to a film, than the substrate. Nonwoven substrate is printed and demonstrates more improved printing in comparison with an untreated substrate.
EFFECT: invention provides a nonwoven substrate for absorbent products, which demonstrates improvements, selected according to a tactile sensation, printing, bulk, elasticity/extensibility, reduction of hysteresis, ability to reduce, reduction of ripple marks and their combinations in comparison with an untreated substrate.
40 cl, 10 dwg, 5 tbl, 3 ex