Composite integral sheet of highly absorbent wrap material with hydrophobic water-vapor-permeable pellicle

  • US 5,480,693 A
  • Filed: 01/12/1995
  • Issued: 01/02/1996
  • Est. Priority Date: 06/13/1991
  • Status: Expired due to Term
First Claim
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1. A foldable composite integral food wrap, comprising:

  • a foldable sheet having a water-vapor-impermeable polymeric layer disposed between a printable layer and an absorbent layer;

    wherein at least one of said printable layer and said absorbent layer is discontinuously bonded to said polymeric layer at spaced locations, so that at least one of said printable layer and said absorbent layer forms air pockets with said polymeric layer at locations between the bond locations, said absorbent layer being fibrous and having a foraminous hydrophobic water-vapor-permeable pellicle on at least those fibers of the face of said absorbent layer opposite to said water-vapor-impermeable polymeric layer, said absorbent layer comprising the reaction product of in-situ cross-linking of an absorbent water soluble polymer, said reaction product being water insoluble and exhibiting a water-retention capacity of at least about 10 grams of water per gram of reaction product, the amount of reaction product present on an area basis being sufficient to absorb at least about 0.001 grams of water per square centimeter, the total amount of reaction product in said sheet being sufficient to absorb at least 1 gram of water.

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