Method for manufacturing a kink-resistant fire hose

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 70/10 (2006.01) B29D 23/24 (2006.01)

Patent

CA 2168497

The present invention relates to a non-mandrel method of manufacturing a flexible, kink- resistant hose capable of regaining an original shape after crushing. This process comprises the extruding of a continuous length of an uncured elastomeric tube provided with an adhesive layer and formation of a hose reinforcement layer or jacket around this elastomeric tube. The jacket comprises a tubular sleeve formed by means of a warp yarn running in the longitudinal direction of the tubular sleeve and a weft yarn running in the transverse direction of the tubular sleeve. The weft yarn is interwoven with the warp yarn, and it comprises a combination of a multi-filament weft yarn alternating with a mono-filament weft yarn. The mono-filament weft yarn is characterized by being of extreme stiffness and rigidity, which enables the hose to retain its round shape by resisting collapsing and crushing.

a présente invention se rapporte à une méthode de fabrication sans formage sur mandrin d'un tuyau flexible, résistant aux bouclages, avec la capacité de reprendre sa forme originale après écrasage. Ce processus comprend l'extrusion d'une longueur continue d'un tube élastomérique non vulcanisé doté d'une couche adhésive et la formation d'une couche ou d'une enveloppe de renforcement autour du tube élastomérique. L'enveloppe comporte une gaine formée par un fil de chaîne disposé dans le sens de la longueur de la gaine et un fil de trame disposé dans son sens travers. Le fil de trame est entrelacé avec le fil de chaîne et il comprend une combinaison d'un fil de trame multifilament qui alterne avec un fil de trame monofilament. Le fil de trame monofilament présente des caractéristiques extrêmes de rigidité et de raideur, ce qui permet au tuyau de maintenir sa forme arrondie en résistant à la déformation et à l'écrasage.

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