Adhesive transfer hose having a barrier layer and method of use
AssigneeNordson Corporation
InventorsJim Keough, Leslie J. Varga, Laurence B. Saidman, Wes Fort, Jay Lanier
Life of this patent
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Abstract
A multi-layered hot melt adhesive transfer hose is provided. The transfer hose has a barrier layer that prevents or minimizes the ingress of oxygen and other gases into a conduit of the hose. The transfer hose has at least one structural layer overlaying an exterior surface of the barrier layer to help the hose withstand a high fluid pressure. The barrier layer prevents the hot melt adhesive being transported in the hose from discoloring and charring when the adhesive is heated from about 250° F. up to and including 450° F. for an extended period of time.
Claims20
A multi-layered hot melt adhesive transfer hose, comprising:
- a flexible metal inner tube for transporting heated liquid hot melt adhesive and forming an impermeable barrier layer configured to prevent an ingress of oxygen from passing through the flexible metal inner tube and into the hot melt adhesive;
- at least one structural layer configured to withstand a fluid pressure;
- an outer covering overlaying and in contact with an exterior surface of the at least one structural layer;
- and
- a heater for maintaining the hot melt adhesive at a set point, wherein the heater is adapted to be electrically coupled to a power source controlled to maintain the set point to about 230° C. (450° F.) or less for an extended period of time.
Dependencies are inferred from the claim text.