D - Textiles – Paper – 01 – F
Patent
D - Textiles, Paper
01
F
D01F 6/76 (2006.01) C08G 12/32 (2006.01)
Patent
CA 2216872
A process is disclosed for producing filaments from a hydroxy- or aminoalkylmelamine-modified melamine/formaldehyde condensation product. The highly concentrated aqueous solution of a melamine/formaldehyde condensation product is filtered, extruded through a spinning nozzle, the extruded threads are dried in a dry shaft by means of hot air, and the dried threads are processed in a tempering furnace at temperatures that rise progressively up to a maximum temperature from 160 to 250 ~C, thus hardening the pre-condensed product.
L'invention concerne un procédé de fabrication de filaments à partir d'un produit de condensation de mélamine/formaldéhyde modifié par une hydroxyalkylmélamine ou aminoalkylmélamine. On filtre une solution aqueuse très concentrée d'un produit de condensation de mélamine/formaldéhyde, on l'extrude à travers une filière et on sèche à l'air surchauffé les fils extrudés dans un puits de séchage. On traite ensuite les fils séchés dans un four à recuire à des températures qui augmentent successivement jusqu'à une température maximale comprise entre 160 et 250 ·C, de manière à durcir le produit pré-condensé.
Berbner Heinz
Gihr Hartmut
Rachwalsky Uwe
Zettler Hans Dieter
Basf Aktiengesellschaft
Basofil Fibers Llc
Robic
LandOfFree
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