Structural laminate with corrugated core and related method

Details Structural laminate with corrugated core and related method Structural laminate with corrugated core and related method

1995-04-13

1997-10-07

Loney, Donald

Stock material or miscellaneous articles

Structurally defined web or sheet

Nonplanar uniform thickness material

428120, 428186, 156213, 156250, 156264, 156292, B32B 328, B32B 3100

Patent

active

056745931

ABSTRACT:
This invention provides a structural laminate which includes thin outer layers of cellulose polymer material sandwiched about a corrugated cardboard core, where flutes of the corrugated extend perpendicularly between the outer layers of cellulose polymer material. More specifically, the outer layers of the composite are relatively thin sheets of a delignified cellulose polymer material, and the core comprises conventional corrugated cardboard with at least some, and preferably all of the flutes oriented on edge, i.e., extending perpendicularly between the outer layers. A related method comprises the steps of:
a) forming a stack of corrugated cardboard sheets to a predetermined height, the sheets adhesively secured, one to the other;
b) cutting a plurality of strips of predetermined width from the stack;
c) turning one or more of the strips 90.degree. and adhesively securing the one or more strips to an inside surface of a first outer sheet, thereby forming the inner core; and
d) adhesively securing a second outer sheet over the inner core.

REFERENCES:
patent: 3661099 (1972-05-01), Shelor
patent: 4424753 (1984-01-01), Eatherton
patent: 5008359 (1991-04-01), Hunter
patent: 5140086 (1992-08-01), Hunter et al.
patent: 5433156 (1995-07-01), Hutchison

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