US 2004/0000581 A1 · Polypropylene/cushioned envelope

Abstract

An envelope includes a front wall having two lateral edges, a top edge, and a bottom edge; and a rear wall having two lateral edges, a top edge, and a bottom edge, the front and rear walls joined along their respective lateral and bottom edges; wherein the front and rear walls each have an outer ply including an outer layer including a propylene polymer or copolymer, polyamide or copolyamide, or polyester or copolyester, and an inner layer including an ethylene homopolymer or copolymer; and an inner ply including an inner and outer surface, including an air cellular or foamed material; the inner surface of the outer ply being adhered to the outer surface of the inner ply. A closure flap or other closure device, and one or more intermediate layers, can optionally be included in the envelope.

Claims23

Dependent claims

An envelope comprising:

a) a front wall having two lateral edges, a top edge, and a bottom edge;
and
b) a rear wall having two lateral edges, a top edge, and a bottom edge, the front and rear walls joined along their respective lateral and bottom edges;
the front and rear walls each comprising
i) an outer ply comprising
(a) an outer layer comprising a polymer selected from the group consisting of propylene polymer or copolymer, polyamide or copolyamide, and polyester or copolyester;
and
(b) an inner layer comprising ethylene homopolymer or copolymer,
wherein the outer ply has an outer surface and an inner surface;
and
ii) an inner ply having an inner surface and an outer surface, comprising an air cellular or foamed material;
the inner surface of the outer ply being adhered to the outer surface of the inner ply.

9 more elements

Dependencies are inferred from the claim text.

Polypropylene/cushioned envelope

Life of this patent

Polypropylene/cushioned envelope

Life of this patent

Abstract

Claims23