B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 29/00 (2006.01) B31B 1/62 (2006.01) B32B 7/12 (2006.01) B32B 7/14 (2006.01) D21H 27/32 (2006.01)
Patent
CA 2082795
ABSTRACT A method for adhesively bonding opposed paperboard surfaces to each other to form a strengthened bond in a paperboard product and paperboard products formed thereof, comprising the steps of (A) applying a green-strength adhesive to at least a portion of the first paperboard surface; (B) applying a styrene- butadiene latex adhesive or a modified styrene-butadiene latex adhesive as a strengthening adhesive to at least a portion of either the first or the second paperboard surface such that the green-strength adhesive is substantially offset from the strengthening adhesive when the first and second paperboard surfaces are positioned in an opposed relationship; (C) orienting the first and second paperboard surfaces such that they are opposed to each other; (D) contacting the first and second surfaces together to form the strengthened bond and (F) sufficiently immobilizing the strengthened bond for a suitable period of time to allow the strengthened bond to set. In addition, there is provided a method for adhesivelybonding opposed paperboard surfaces to form a strengthened bond in a paperboard product, and paperboard products formed thereof, by applying a strengthening adhesive consisting essentially of a styrene-butadiene latex adhesive or a modified styrene-butadiene latex adhesive to at least a portion of the first paperboard surface, contacting together the paperboard surfaces to form the strengthened bond and sufficient1y immobilizing the strengthened bond for a suitable period of time toallow the strengthened bond to set. Both virgin and recycled paperboard can be used. bjc/c:\wpf\patwork\apps\1358.002
Culhane William J.
Watkins R. Kenneth
Wright James W.
Meadwestvaco Packaging Systems Llc
Ridout & Maybee Llp
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