Discontinuous polyethylene terephthalate fibres and method...

D - Textiles – Paper – 01 – F

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D01F 6/62 (2006.01) D01D 5/12 (2006.01)

Patent

CA 2378747

The present invention relates discontinuous polyethylene terephthalate fibres characterised by a new combination of properties. The association of new stress-elongation and modulus properties enables the production of discontinuous fibres, textiles or household fabrics having very high aesthetic qualities and utility values. The invention also relates to an economical method in two steps for producing said discontinuous polyethylene terephthalate fibres. Fusion spinning is carried out at a high polymer flow- rate and at a running speed of at least 600 m/min. The drawing, thermal setting, creping and drying steps are carried out on a separate drawing bench.

L'invention concerne des fibres discontinues de polyéthylène téréphtalate caractérisées par une nouvelle combinaison de propriétés. L'association de nouvelles caractéristiques de contrainte-allongement et de module permet d'obtenir des fibres discontinues, des textiles ou des tissus d'intérieur présentant des qualités esthétiques et une valeur utilitaire extrêmement élevées. L'invention concerne également un procédé économique, en deux étapes, pour produire des fibres discontinues de polyéthylène téréphtalate. Le filage par fusion s'effectue avec un débit de polymère élevé et une vitesse de déroulement d'au moins 600 m/min. L'étirage, le thermofixage, le crêpage et le séchage sont effectués dans un banc d'étirage de fibre séparé.

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