Method for producing of viscose staple fiber containing antibacterial preparation and non-woven material from the same

FIELD: chemical and light industry, in particular, production of viscose staple fiber containing antibacterial preparation for manufacture of non-woven material used for manufacture of air filters.

SUBSTANCE: method involves washing formed viscose threads; squeezing to provide 50%-content of α-cellulose; treating with aqueous catamine solution having mass concentration of 15-40 g/dm3; providing two-staged washing procedure in countercurrent of softened water at feeding and discharge temperature difference making 4-6 C at first stage and 3-5 C at second stage. Temperature of aqueous catamine solution is 18-30 C. Resultant thread has linear density of single fibers of 0.17-0.22 tex and mass fraction of 0.6-4.0% of catamine. Thread is subjected to drying process at temperature of drying drum surface of 80-90 C, followed by corrugation and cutting into 60-70 mm long fibers. Method further involves fixing resultant fibrous web by stitching process on substrate of thermally secured polypropylene having surface density of 10-30 g/m2.

EFFECT: enhanced antibacterial properties and reduced aerodynamic resistance of resultant material allowing blowing-off of fibers from filter layer by flow of air under filtering process to be prevented.

3 cl, 2 tbl, 6 ex

 

The invention relates to chemical and light industries and is designed for production of viscose staple fiber with antimicrobial drugs and the production of non-woven material for manufacturing of air filters.

In the prior art by SU 1828883 IPC 7 D01F 11/02 23.07.1993 known method of producing antimicrobial cellulose fibers characterized by processing carboxymethylamino cellulose fibers in an aqueous solution of salts of nitrogen-containing antimicrobial substances by washing with water and drying. As the fiber used viscose fiber containing 05-1,5% of the carboxyl groups in the Na-form.

The processing solution of antimicrobial substances is carried out at a concentration of 0.2-2.5% during 60-100, wring out and additionally withstand fiber for 60-80 C.

The known method is a chemical modification, which cannot be implemented if there is no reaction of the group of fibers or have attached to them drugs antimicrobial compounds.

We stated the way to obtain viscose staple fiber with antimicrobial drug of viscose yarn is a physical modification, based on the introduction into the capillaries and pores of the internal structure of the thread instead of sulfuric acid, salts and sulfur is formed by molding, antimicrobial agents is a, with subsequent fixation of the inner structure of the thread through drying.

This technical result is achieved in that in a method of producing viscose staple fiber with antimicrobial drug of viscose yarn by treating the filaments with an aqueous solution of catamine AB, washing with water, drying, folds and cutting, in which according to the invention emerge from the washing molded threads wring out up to 50% αpulp and treated with an aqueous solution of catamine AB with a mass concentration of 15-40 g/DM3. The yarn is washed by countercurrent softened water in two stages with the temperature difference at the supply and discharge lines constituting the first stage 4-6°and in the second stage 3-5°C. the temperature of the aqueous solution of catamine AB is 18-30°C. the resulting yarn having a linear density of filaments to 0.17; 0.22 Tex (depending on feed viscose), in which the mass fraction of catamine AB is 0,6-4,0%, dried at the temperature of the surface of the drying drum 80-90°, corrugate and cut into a fiber length of 60-70 mm

Viscose staple fiber with antimicrobial substance, obtained by the claimed method, is made of a fibrous layer comprising fibers with a linear density of 0.17 Tex and 0.22 Tex in the ratio 25:75, respectively, which contains 1.1-1.4% of catamine AB and has a surface platnost-500 g/m 2. Formed fibrous layer fasten needle method with a substrate of thermally bonded polypropylene weighing 10-30 g/m2getting non-woven material for air filters.

Analogous to the claimed antimicrobial material is a multilayer antimicrobial filter material on SU 1745297, IPC 7 01D 39/04, 07.07.1992, which is made of needle-punched way from fibrous webs based on viscose fibres of different linear density containing an antimicrobial substance.

The disadvantages of the above known solutions are the low antimicrobial properties, high surface density of the material and blowing the fibers of the layer of filter material flow of filtered air.

The technical result from the use of the present invention to provide an antimicrobial non-woven material with enhanced antimicrobial properties due to the introduction of antimicrobial drug at the capillary level, a lower surface density and low aerodynamic resistance, excluding the blowing of fibers of the layer of filter material flow of filtered air.

The method of obtaining viscose staple fiber with antimicrobial drug of viscose yarn according to the invention carries out the I in the following way.

The spinning solution is formed into a precipitation bath, put plastification stretching and the two-stage leaching softened water supplied by the counter. The temperature of the softened water, the first stage of leaching on the pitch is 60±2°With, on the junction 56-54°C, i.e. the temperature difference is 4÷6°C. the temperature of the softened water to the second stage of leaching on the pitch is 60±2°With, on the junction - 57-55°C, i.e. the temperature difference is 3÷5°C. the resulting temperature gradient across the first and second stages of washing directed against the movement of the thread and creates optimal conditions for the transition of water-soluble impurities from the pores and capillaries of the internal structure of the threads in the wash water.

After the second washing molded threads presses up to 50% αpulp and must be processed with an aqueous solution of catamine AB with a concentration of 15-40 g/DM3and temperature 18-30°C.

The introduction of catamine AB in washed from impurities and depressed, as indicated above, up to 50% αpulp freshly formed yarn is produced at the capillary level. Antimicrobial drug gets into the internal structure of the thread and then fixed it in the drying process in the drying drum surface 80-90°C. Then Poluchenie thread corrugate and cut into a fiber length of 60-70 mm in the aggregate SHA-5K.

p> The invention is illustrated by the following examples of its implementation.

Example 1. Viscose filament formed into a precipitation bath containing 95-110 g/DM3H2SO4, 80-95 g/DM3ZnSO4,280-300 g/DM3NaSO4when the temperature 54-59°C. Then the threads arrive at plastification the hood. After drawing the thread dovolenkovat and subjected to leaching in two stages softened water supplied by a counter-current, the temperature of the softened water, the first stage of leaching on the pitch is 60±2°With, on the junction - 56-54°With the second stage of leaching on the supply - 60±2°With, on the junction - 57-55°C. Then thread wring out up to 50% αpulp, treated with an aqueous solution of catamine AB with a concentration of 15 g/DM3and a temperature of 18°and dried in a tumble dryer at the temperature of its surface 80-90°C. Obtained viscose yarn with antimicrobial drugs have a linear density of filaments 0,17 Tex, a massive share of catamine AB 0.6% and a moisture content of 12%. Then the yarn is subjected to corrugation and cutting the fiber length of 60-70 mm staple Assembly SHA-5K.

Example 2. Viscose filament formed into a precipitation bath containing 95-110 g/DM3H2SO4, 80-95 g/DM3ZnSO4, 280-300 g/DM3NaSO4when the temperature 54-59°C. Then the threads arrive at plastification the hood. After drawing neath dovolenkovat and subjected to leaching in two stages softened water, fed counter-current, the temperature of the softened water, the first stage of leaching on the pitch is 60±2°With, on the junction - 56-54°With the second stage of leaching on the supply - 60±2°With, on the junction - 57-55°C. Then thread wring out up to 50% αpulp, treated with an aqueous solution of catamine AB with a concentration of 15 g/DM3and a temperature of 18°and dried in a tumble dryer at the temperature of its surface 80-90°C. Obtained viscose yarn with antimicrobial drugs have a linear density of filaments 0.22 Tex, a massive share of catamine AB 0.6% and a moisture content of 12%. Then the yarn is subjected to corrugation and cutting the fiber length of 60-70 mm staple Assembly SHA-5K.

Example 3. Viscose filament formed in accordance with example 1. Then treated with an aqueous solution of catamine AB with a concentration of 30 g/DM3and a temperature of 25°C, dried in a tumble dryer. Received viscose yarn with antimicrobial drugs have a linear density of filaments 0,17 Tex, a massive share of catamine AB 2.5% and a moisture content of 12.5%. Then the yarn is subjected to corrugation and cutting on fiber length 6-70 mm staple Assembly SHA-5K.

Example 4. Viscose filament formed in accordance with example 1. Then treated with an aqueous solution of catamine AB with a concentration of 40 g/DM3and a temperature of 30°and dried on the drying drum is. Received viscose yarn with antimicrobial drugs have a linear density of filaments 0.22 Tex, a massive share of catamine AB 4.0% and a moisture content of 13%. Then the yarn is subjected to corrugation and cutting on fiber length 6-70 mm staple Assembly SHA-5K.

Antimicrobial non-woven material was obtained as follows.

Obtained in examples 1-3 fiber serves on dialnow car brand S-140-Sh. On Shipley car fibrous mass rostkovaya, mix and rasshiryayut. Then pneumatically fed into the condenser brand CWA, separate the dust and short fibers, after which the fibrous mass is sent on a carding machine brand H-11-W, where the operation is conducted education fibrous layer consisting of preliminary and final comb through the fibers. Next, the fibrous layer is formed in the canvas on the Converter webs brand PE-201. Molded fibrous canvas is transferred to the feed conveyor to the machine needle marks THEM-1800-M, where through a needle having a notch, is the promotion of fibers through the thickness of the canvas. To avoid knocking antimicrobial fibers when filtering air before operation igloprobivnye canvas of fibers is applied on a substrate of thermally bonded polypropylene weighing 30 g/m3.

Compared to similar offers is expressed antimicrobial non-woven material has a high antimicrobial properties due to the introduction into it of antimicrobial drug at the capillary level, and the use of fibers with a linear density of 0.17 and 0.22 Tex and a substrate of thermally bonded polypropylene weighing 10-30 g/m2provides higher effectiveness of the filter and a lower surface density. All this saves raw materials in the production of non-woven material and its low aerodynamic resistance. Furthermore, the presence of a substrate of thermally bonded polypropylene eliminates the knockout fibers at the air filter.

Example 5. On needle machine THEM-1800-M receive a single layer of viscose antimicrobial filter material of fibrous webs using canvas of fibres and with a linear density of 0.17 and 0.22 Tex in the ratio 25:75. The surface density of the material 400 g/m2content alkyldimethylbenzylammonium (catamine AB) in the material of 1.1%. Tested antimicrobial properties of samples of the filter material according to the method developed by the Federal ncase". As the test culture use Staph aureus 209 p and Bac. subtilis 6633. Microbial load 500000 microbial cells in 1 ml of medium. Antimicrobial activity expressed by the volume of the nutrient medium, in which 1 g of the material inhibits the growth of culture, control is the growth of culture in a nutrient medium without material. One gram of the material inhibits the growth of culture Staph aureus 209 p in a volume of 20 DM3growth Kul is Bac tours. subtilis 6633 - 5 DM3meat-peptone broth (BCH).

Aerodynamic resistance of a material at a specific air flow rate of 5.3 DM /min/cm2- 32,1 mm VST filtration Efficiency dust "6N" - 100%. The efficiency particulate oil mist (average particle diameter 0.3 μm) at a flow rate of air of 1 cm/s to 45%.

The material has overlapping substrate of thermally bonded polypropylene with a surface density of 10 g/m

Example 6. Single-layer antimicrobial material obtained in accordance with example 4. The surface density of the material 300 g/m2content catamine AB in the material of 1.2%. One gram of the material inhibits the growth of culture Staph aureus 209 p in a volume of 20 DM3the growth of culture Bac. subtilis 6633 - 2 DM3meat-peptone broth (BCH).

Aerodynamic resistance of a material at a specific air flow rate of 5.3 DM3/min/cm2- 12.0 mm VST filtration Efficiency dust "6N" - 99,3%. The efficiency particulate oil mist (average particle diameter 0.3 μm) at a flow rate of air of 1 cm/s to 38%.

The material has overlapping substrate of thermally bonded polypropylene weighing 30 g/m2.

Example 7. Single-layer antimicrobial material obtained in accordance with example 4. The surface density of 500 g/m2content Catamenia in the material of 1.4%. One gram of the material inhibits the growth of culture Staph aureus 209 p in a volume of 20 DM3the growth of culture Bac. subtilis 6633 - 2 DM3meat-peptone broth (BCH).

Aerodynamic resistance of a material at a specific air flow rate of 5.3 DM3/min/cm2- 36 mm VST filtration Efficiency dust "6N" - 100%. The efficiency particulate oil mist (average particle diameter 0.3 μm) at a flow rate of air of 1 cm/s to 48%.

The material has overlapping substrate of thermally bonded polypropylene weighing 17 g/m2.

Table 1
Number exampleThe linear density of the filament, TexThe temperature of the wash water, °Conditions for obtaining viscose yarn with antimicrobial drugThe content of catamine AB obtained in thread
I stageStage IIThe concentration of catamine AB in solution, g/cm3The temperature of the solution catamine AB, °
supplyplumsfeed andplums
10,1760±256-54 60±257-5515180,6
20,2260±256-5460±257-5515180,6
30,1760±256-5460±257-5530252,5
40,2260±256-5460±257-5540304,0
The placeholder----20200,64

Table 2
Number ExampleNumber of catamine AB in material %The surface density of materialThe number of layers of material, piecesVolume BCH, in which 1 g of the material inhibits the growth of cultureAerodynamic resistance, mm VST
R6633
 /td> 1+duplicate substrate of thermally bonded polypropylene
51,140020532,1
61,2300-"-205to 12.0
71,4500-"-20236,0
The placeholder1,5400410559,9

1. The method of obtaining viscose staple fiber with antimicrobial drug of viscose yarn by treating the filaments with an aqueous solution of catamine AB, washing with water, drying, folds and cutting, which goes with flush moulded thread wring out up to 50% αpulp and treated with an aqueous solution of catamine AB with a mass concentration of 15-40 g/DM3when this yarn is washed by countercurrent softened water in two stages with the temperature difference at the supply and discharge lines constituting the first with the adiya's 4-6° And in the second stage 3-5°C, the temperature of the aqueous solution of catamine AB is 18-30°, dried filament at the temperature of the drying drum 80-90°S, then the resulting yarn having a linear density of filaments, Tex 0,17-0,22, in which the mass fraction of catamine AB is 0,6-4,0%, cut into a fiber length of 60-70 mm

2. Antimicrobial filter material consisting of a fibrous web on the basis of viscose fibers with a linear density of 0.17 and 0.22 Tex at a ratio of 25:75, respectively, containing 1.1 to 1.4 wt.% catamine AB as antimicrobial substances, and bonded with him punched by way of the substrate, is made of thermally bonded polypropylene weighing 10-30 g/m2.



 

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FIELD: chemical and light industry, in particular, production of viscose staple fiber containing antibacterial preparation for manufacture of non-woven material used for manufacture of air filters.

SUBSTANCE: method involves washing formed viscose threads; squeezing to provide 50%-content of α-cellulose; treating with aqueous catamine solution having mass concentration of 15-40 g/dm3; providing two-staged washing procedure in countercurrent of softened water at feeding and discharge temperature difference making 4-6 C at first stage and 3-5 C at second stage. Temperature of aqueous catamine solution is 18-30 C. Resultant thread has linear density of single fibers of 0.17-0.22 tex and mass fraction of 0.6-4.0% of catamine. Thread is subjected to drying process at temperature of drying drum surface of 80-90 C, followed by corrugation and cutting into 60-70 mm long fibers. Method further involves fixing resultant fibrous web by stitching process on substrate of thermally secured polypropylene having surface density of 10-30 g/m2.

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