Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1989-05-25
1990-04-24
Wityshyn, Michael
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156290, 1563084, 156324, 156553, 156555, 156582, B29C 6518, B32B 3120
Patent
active
049197380
ABSTRACT:
A method of and apparatus for dynamically mechanically bonding together a plurality of laminae, at least one of which comprises thermoplastic material: for example, polyethylene. In one aspect of the invention the laminae are forwarded in face to face relation through a pressure biased nip between a patterned nip defining member and an opposing nip defining member (e.g., a relief patterned cylinder and an anvil cylinder) which members are independently driven to maintain a predetermined surface velocity differential between them. In another aspect of the invention which is particularly useful at intermediate and higher line velocities--preferably for line velocities of about 300 feet or more per minute and, more preferably, for line speeds of about 450 feet or more per minute--the nip defining members may be operated with equal surface velocities. In each of these aspects of the invention, the members may be biased towards each other to provide a predetermined pattern-element-psi loading; and, additionally, they may be independently heated to provide each with an elevated surface temperature which is, preferably, in a predetermined range below the melt temperature of the thermoplastic lamina disposed closet to or in contact with each respective nip defining member as the laminae are forwarded through the nip.
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Ball W. Kenneth
Goulait David J. K.
Zorb James E.
Braun Frederick H.
Huston Larry L.
Slone Thomas J.
The Procter & Gamble & Company
Wityshyn Michael
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