Bleaching and dyeing; fluid treatment and chemical modification – Chemical modification of textiles or fibers or products thereof – Treating textiles or fibers from synthetic resin or natural...
Patent
1997-07-11
1998-12-29
Diamond, Alan
Bleaching and dyeing; fluid treatment and chemical modification
Chemical modification of textiles or fibers or products thereof
Treating textiles or fibers from synthetic resin or natural...
81492, 4234473, 4234474, 4234476, 4234477, 4234478, 264 291, 264 296, 264 297, D01F 922
Patent
active
058534296
ABSTRACT:
Method for converting two-dimensional or three-dimensional sheet structures consisting of polyacrylonitrile fibres or substantially of polyacrylonitrile fibres, such as woven fabrics, layered materials, knitted fabrics, felts, or non-woven fabrics, into the thermally stabilized but non-carbonized state, by means of an oxygen-containing or oxygen-yielding gas flowing through the respective sheet fibre structure. This gas or gas mixture is used as a medium for the temperature control in the sheet fibre structure and as a means for supplying the oxygen carrier and also removing the gaseous reaction products. Temperature and flow velocity of the gas/gas mixture are matched to the stabilization characteristic of the respective sheet fibre structure and are controlled precisely. The device used for carrying out the method consists of a furnace (23) which consists of at least one chamber, through which furnace a web of the sheet fibre structure (18) is moved continuously. During this transportation the oxygen-containing or oxygen-emitting gas flows through the sheet fibre structure (18) in a controlled manner.
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Pirogov V. A. et al, "Development of Equipment for Heat Treatment of Carbon Fibres" Fibre Chemistry, Bd. 25, Nr. 5, Sep. 1, 1993, pp. 383, 385.
Fitzer, E., et al, Carbon 13: 63-69 (1975). (Month unknown).
Heine Michael
Kompalik Dieter
Diamond Alan
SGL Technik GmbH
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