TCI logo MECHANO-CHEMICAL COTTONIZING OF SHORT LINEN FIBERS

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Leader of the group:

Gubina Svetlana M.
Senior scientist, Institute of Solution Chemistry; 
Ph. D 1971, Ivanovo Institute of Chemical Technology

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Staff: 

Stokozenko Valerija G.
Senior scientist, Institute of Solution Chemistry
Ph.D 1988, Ivanovo Institute of Chemical Technology

Larin Igor Yu.,
Assistant Professor, Ivanovo Textile Academy;
Ph.D 1985 , Ivanovo Textile Academy

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The increased popularity of linen goods is due to their high hygienic and comfort properties. Pure linen goods are considered to be elite and expensive, that is why most linen raw material is processed in blended yarn using classic cotton- and wool weaving technologies which are more efficient in comparison with the technology of flax weaving.

The process of joint linen-with-cotton or linen-with-wool weaving is impossible without preliminary modification of the properties of the linen fibers. This problem is being solved by cottonizing technology. In Germany, Uk and France several methods for mechanical cottonizing of linen fibers have been deveoped and special equipment has been constructed.

Russian flax, known for its low quality (the content of firm wood-like fractions - 40-60%, high concentration of impurities, small fiber length) is processed into fabrics of everyday necessities only for 25-30%. Neither foreign equipment, nor the existing native cottonizing aggregated apparata can produce high quality cottonine. This is the reason why only 20% of cottonine can be used in blends; consequently,only a limited range of blends can be manufactured using such yarn. Additionally, such yarn causes increased breakageduring weaving, accelerated wear of equipment, harmful working conditions due to its high dust content.

A group of scientists from the Institute of Solution Chemistry and Ivanovo Textile Academy headed by Svetlana M Gubina have developed a novel highly effective method of cottonine production (mechano-chemical) which can be realized using standard equipment.

This method doubles the quantity of fibrous materials that can be extracted from the wastes of the standard process of obtaining long linen fibers from flax.

The distinctions of newly produced cottonine are:
bullet5.gif (101 bytes)  very low linear density;
bullet5.gif (101 bytes)  exellent weaving properties;
bullet5.gif (101 bytes)  high degree of admixtures and impurities removal;
bullet5.gif (101 bytes) low percentage of non-weavable fibers (in comparison with mechanical cottonine, the losses in weaving cotton blends are 2-4 times less, in wool blends weaving the losses are reduced to 2-3%).

The combination of these characteristics makes mechano-chemical cottonine suitable for joint processing with cotton and other natural and synthetic fibers; this has been proved by extended industrial testing.

The experimental batches of yarn and fabrics have been manufactured with 25-50% cottonine content and have shown remarkable hygroscopicity, softness, and comfortability.

New technology for a one-stage process for cottonizing and dyeing short linen fibers with vat dyes has been developed. This provides the possibility to produce coloured cottonine without deterioration of its weaving properties.

The created mechano-chemical cottonizing technology can therefore be used to manufacture:
bullet5.gif (101 bytes)      textile products - mechanical cottonine,
         mechano-chemical cotonine,
         coloured cottonine;
bullet5.gif (101 bytes)       products for medicine and pharmacology
         highly hygroscopic cotton wool,
         ecologically pure sorbents.

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Recent publications

1. Gubina S.M., Larin I.Yu., Stokozenko V.G., Shitik E.V., Moryganov A.P. Technological aspects of cottonine production and processing. Tekstilnaja promyshlennost (Textile Industry), No 4-5, (1995), P. 49-55.
2. Gubina S.M., Larin I.Yu., Stokozenko V.G., Moryganov A.P., Shitik E.V. New technology for linen fiber scutching wastes cottonizing and the application of cottonine for yarn and fabrics production. Tekstilnaja promyshlennost (Textile Industry), No 2 (1995), P. 13-21.
3. Gubina S.M., Stokozenko V.G., Larin I.Yu., Moryganov A.P. The specificity of mechano-chemical cottonine production and processing into yarn and fabrics. Tekstilnaja promyshlennost (Textile Industry), No. 6, (1997), 18-21.
4. Gubina S.M., Stokozenko V.G. About the method of cottonine content definition in blends with cellulosic fibers. Tekstilnaja Khimija (Textile Chemistry), No 1(10), (1997), P. 95.
5. Gubina S.M., Stokozenko V.G., Larin I.Yu., Razumov F.I., Dadeeva E.N. Application of cottonine in woolen fabrics manufacturing. Tekstilnaja Khimija (Textile Chemistry), No 3(12), (1997), P.27-28.

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Address:
Institute of Solution Chemistry of the Russian Academy of Sciences,
1, Akademicheskaja Street Ivanovo 153045 Russia
Fax: 7 0932 378 509
e-mail: textile@ihnr.polytech.ivanovo.su
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