Valve Bag
OwnerHans-Joachim Wichmann, Gunter Sudecuminventors
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Abstract
The invention relates to a vented bag comprising a tubular vent that is secured in a folded base. Said vent comprises an upper face (4) that lies flat on a lower face (2) and consists of a base material that is provided with a weldable layer. The aim of the invention is to obtain a stable connection between the base material and the weldable layer. To achieve this, the weldable layer consists of a polyvinyl alcohol with a saponification degree ≧75%, which is applied to the base material in the form of an aqueous emulsion and is then dried.
Claims6
Valve bag with a tubular valve (1) fastened in a folded bottom, with an upper side (4) lying flat on a lower side (2) and comprised of a base material provided with a weldable layer, wherein the weldable layer is comprised of a polyvinyl alcohol with a saponification degree ≧75% applied in the form of an aqueous emulsion onto the base material and dried.
Dependencies are inferred from the claim text.