METHOD AND DEVICE FOR FORMING A LONGITUDINAL FIBRE WEB AND FOR FORMING A TRANSVERSE FIBRE WEB AND FOR FORMING A CROSS FIBRE WEB AND FOR FORMING AN AIRBAG

摘要

A method for manufacturing an inflatable body (1020), such as an airbag, comprises the steps of:
providing a first longitudinal fibre web (61) comprising a
first substrate layer (63) with a first set of fibres (62);
providing a second longitudinal fibre web (71) comprising a second substrate layer (73) with a second set of fibres (72);
cutting web segments (75) from the second longitudinal fibre web;
positioning the web segments onto the said first longitudinal fibre web at an angle;
performing a heat treatment, so that at least the substrate layers of the two webs melt together, in order to thus form a crossply (1000; 2000);
placing two sheets of crossply onto each other;
locally performing a heat treatment on the two sheets so that the carrier layers locally melt together, wherein the melting spots together form a curved sealing line (1010) defining an inner space (1013) between both sheets.