Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1995-12-18
1997-03-11
Knable, Geoffrey L.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156210, 15624422, 156336, 1062142, 1062101, B31F 504
Patent
active
056097115
ABSTRACT:
A method whereby a significantly pregelatinized starch bearing adhesive composition may be used for bonding two laminae such as corrugated board or other panel products. A feed stream of essentially ungelatinized starch is sent to an application device. There it is significantly gelatinized within the application device and applied to the substrate laminae. The adhesive at the time of application is no longer a liquid, but is a partial gel, a gel, or a thermally melted composition. The adhesive is extruded onto the substrate as a multiplicity of parallel beads or as a full width ribbon. Temperature of the melted starch composition may be reduced prior to extrusion to limit puffing or expansion of the extrudate. The resulting laminae may be pressed tightly face to face or they may remain somewhat spaced apart by the beads of adhesive. The method allows the use of both refined and unrefined starch bearing materials to be used in the adhesive composition.
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Gehr Keith D.
Knable Geoffrey L.
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