Bleaching and dyeing; fluid treatment and chemical modification – Chemical modification of textiles or fibers or products thereof – Cellulose fibers
Patent
1996-07-19
1998-11-17
Diamond, Alan
Bleaching and dyeing; fluid treatment and chemical modification
Chemical modification of textiles or fibers or products thereof
Cellulose fibers
8137, 8139, 81081, 8111, 8156, 8157, 8141, 57 1R, 19 66CC, 19200, 19201, D01C 100, D06M 1144
Patent
active
058370099
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT/GR95/00015 filed Sep. 5, 1995.
This invention refers to an original method for the processing of cotton yarns: By this method, the traditional mechanical spinning process is substituted by a wet process which involves complete purification of the cotton by rendering it hydrophilic. This process is self-sufficient in terms of energy consumption and does not lead to environmental pollution.
The textiles industry is a field of technical and industrial activity since the Renaissance period. The first industrial installations and specialised industrial equipment have been developed for textiles processing. The textiles industry consumes mainly cotton, which is not being produced in Central Europe, where industrial equipment and installations were first developed. Hence, large capital intensive developments were necessary in the cotton-producing countries for the exploitation of the said raw material. Greece is among the cotton producers, indeed the major European producer. Among the European Union countries, Greece is the country most depending on the cotton and yarn manufacturing industry, an industry requiring highly expensive industrial installations, often becoming problematic and economically unsound. With a production of 700,000 tons/year the problems in the industrial exploitation of this industrial agricultural product may reflect badly on the overall economic performance of the Country.
The exploitation of cotton for yarn production is developed along the following series of processes: different equipment of a high capital and operating cost are used. expensive installations are used, and where an alkaline effluent, difficult to handle, is released. coloured effluents are released.
Thus, the cotton yarn production and the cotton fabric production involve complex processes involving high production costs, a high consumption of water and the release of toxic and other harmful pollutants.
The inventor has been intensively involved in Research and Development work aiming at the reduction of production costs and of water consumption and at the elimination of environmental pollution, for the reduction of the overall cost of yarn and fabric production from cotton.
It was observed that the utilization of devices for cotton accommodation by lap and yarn formation is not possible, as wet processes follow the yarn production process.
It was also observed that cotton can be directly introduced into a wet process, as its presence in an aqueous environment will induce fibre orientation. Should this be combined with cotton purification by rendering it hydrophilic to some desirable extent, the process will be complete and cotton will assume a form convenient for spinning, which will not be prone to agglomeration.
It was also observed that this production process leads to yarn and fabric production at a reduced cost, involving a smaller water consumption and the elimination of environmental pollution problems. This production process will also lead to higher quality--lower coast cotton yarn and fabrics.
This invention refers to and describes a method for yarn and fabric production featuring the above advantages leading to cotton yarn production (and subsequently cotton fabric production) in an overall production process free of environmental pollution, which involves generation of heat in the form of biogas produced by the anaerobic digestion in the thermophilic region of the waste material and refuse produced. Thus, this production process constitutes a clean production technology which is self-sufficient in terms of its energy requirements.
According to this invention, the cotton which is received in packages is passed to a tank filled with water containing calcium hydroxide at a ratio of 2-4% by weight of cotton. It also contains non-ionic detergent at a quantity of 2-5 gr./liter of process water. The cotton is suspended in excess water in the order 1-10 or 1-20 weight/volume. The cotton is carried in a polypropylene net and heated to a temperature of 60.degree. to 150.degree. C., (p
REFERENCES:
patent: 2252730 (1941-08-01), Ridgway et al.
patent: 2970882 (1961-02-01), Kumin et al.
Diamond Alan
Innoval Management Limited
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