IMPROVED FILLING OF PROPELLANT GAS INTO POLYURETHANE SPRAY CANS

A method is described for the production of a pressure container or spray can containing a composition for forming polyurethane foam, with the following steps: closing the container, after introducing the liquid components, by securing into the opening of the container head a valve (10) having a hol...

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Bibliographische Detailangaben
Hauptverfasser: DE BACKER, Wim, VAN GORP, Jo, GEBOES, Peter, BRUGGEMAN, Peter, VERVOORT, Bart, DIRCKX, Veerle, PAUWELS, Ben
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:A method is described for the production of a pressure container or spray can containing a composition for forming polyurethane foam, with the following steps: closing the container, after introducing the liquid components, by securing into the opening of the container head a valve (10) having a hollow valve stem (4) centrally arranged in a round valve cup (1) that extends into the valve collar (2), and pressurizing the closed container by injecting at least one propellant gas through the valve stem (4), whereby the valve is opened by compressing the valve stem (4) relative to the valve collar (2), towards the valve cup (1), characterized in that, during the injection, the valve stem (4) is compressed, from its resting position with the valve (10) closed, over a distance of at most 85% of the compression distance corresponding to the reference point (C) on the force-compression distance curve registered on a test bench for a valve (10) of the same embodiment.