Moisture barrier fabric and methods of making same

D - Textiles – Paper – 06 – N

Patent

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Details

D06N 3/04 (2006.01) C11D 1/00 (2006.01) C11D 3/10 (2006.01) D04H 1/46 (2006.01) D04H 18/00 (2006.01) D06C 29/00 (2006.01) D06L 1/12 (2006.01) D06L 1/14 (2006.01) D06L 1/16 (2006.01) D06M 11/76 (2006.01) D06M 15/256 (2006.01) D06M 15/263 (2006.01) D06M 15/277 (2006.01) D06M 15/564 (2006.01) D06M 15/568 (2006.01) D06M 15/576 (2006.01) D06M 15/693 (2006.01) D06N 3/14 (2006.01) D06N 3/18 (2006.01) D06N 7/00 (2006.01)

Patent

CA 2440135

The invention relates to a method for preparing a moisture barrier fabric comprising needling the fabric in a direction substantially opposite to the advance direction of the fabric with barbed needles to increase the density of the fabric by entangling the fibers thereof, open-width washing of the needled facecloth fabric with a detergent and sodium carbonate to further increase fabric density by allowing the fabric to neck down or bulk at a substantially random rate, coating one side of the fabric with at least one coating of a latex formulation for use in forming the backcoating of the moisture barrier fabric, comprising a (meth)acrylic acid urethane copolymer having a curing temperature of approximately 250 to 275 ~F, and immersing the dry moisture barrier fabric, including the latex backing, into a bath of fluorochemical and a solution containing about 10 to about 15 wt% polyurethane, and removing excess fluorochemical from the treated fabric.

La présente invention concerne un procédé de fabrication d'un tissu étanche consistant : à aiguilleter le tissu dans un sens sensiblement opposé au sens d'avancement du tissu au moyen d'aiguilles à barbes de sorte que la densité du tissu soit accrue par l'entremêlement des fibres du tissu ; à laver au large le carré de tissu aiguilleté avec un détergent et du carbonate de sodium pour que la densité du tissu soit encore accrue, de sorte que le tissu soit soumis à la striction et gonfle à un taux sensiblement arbitraire ; à garnir une face du tissu avec au moins un revêtement d'une formule de latex permettant de former une enduction d'envers du tissu étanche, comprenant un copolymère uréthane d'acide (méth)acrylique présentant une température de durcissement comprise approximativement entre 250 et 275 ·F ; à plonger le tissu étanche sec, y compris le support en latex, dans un bain renfermant un composé fluoré et une solution contenant environ de 10 à 15 % en poids de polyuréthane ; et à enlever l'excès de composé fluoré du tissu traité.

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