A method of manufacturing an
inflatable dunnage bag having a wall construction of two integrally fused
layers of
thermoplastic polymer, the outer layer of which is a sleeve of strips of woven
polymer, the inner of layer of which is a continuous layer of gas impervious
polymer. The ends of the sleeve are sealed against the escape of gas. The wall of the bag has a valve for the
admittance of gas to the interior of the bag. The bag is formed by deposition of a continuous molten layer of gas impervious polymer to a sleeve of strips of woven polymer, installing a valve for
admittance of gas into the wall of the sleeve and forming a gas tight seal at the ends of the sleeve. Deposition of the continuous layer of gas impervious polymer may be a two-step process wherein a molten layer of gas impervious polymer is deposited to one exterior side of the flattened sleeve, then to the other exterior side of the flattened sleeve and the sleeve turned "inside-out". The ends of the bag are sealed, may be folded, the folds secured to the exterior of the bag by
adhesive and a binding strip. The
dunnage so manufactured is strong, lightweight, scuff resistant,
moisture resistant, reusable or easily recyclable.