Method for producing a laminated surface
AssigneeAssi Can Aktiebolag
InventorRolf Berg
Life of this patent
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Abstract
In the bonding of two webs, each having a polyolefin resin surface thereon, to form a laminate the polyolefin surface of a first of said webs is heated to a temperature at which the resin will melt or become tacky, while the polyolefin surface of the second of said webs is heated to a given temperature. The heated surfaces are then brought together in a manner to form a substantially permanent bond therebetween. One advantage of the method is that extremely thick high-density plastic foils can be bonded successfully to fibrous carriers.
Claims18
A method of bonding a first web, taken from a first storage reel, to a second web taken from a second storage reel, each of said webs having a polyolefin resin surface thereon comprising the steps of heating the polyolefin resin surface of the first web to a tacky or molten state, heating the polyolefin resin surface of the second web to a given temperature beneath the melting temperature thereof prior to unreeling the second web, substantially maintaining said temperature of the second web throughout the remaining steps, and pressing said polyolefin resin surfaces together while the polyolefin resin surface on the first web remains in the tacky or molten state to form a laminate, the temperature of the second web at lamination being of a magnitude such that said polyolefin resin surfaces, when pressed together, will be joined to form a substantially permanent bond therebetween.
A method according to any one of the preceding claims, in which the second web comprises a high density polyethylene plastic material having a melting temperature within the range of 110.degree. to 150.degree. C., wherein said surface of said second web is brought to a temperature corresponding to 50 to 95% of the melting temperature of said resin.
Dependencies are inferred from the claim text.