초록 ▼

A method for preparing a foam-layered packaging material, which method includes the steps of providing an outer shell having a bottom wall and upwardly extending side walls defining an interior space and having an open top; pouring onto the bottom wall of the outer shell a predetermined quantity of

A method for preparing a foam-layered packaging material, which method includes the steps of providing an outer shell having a bottom wall and upwardly extending side walls defining an interior space and having an open top; pouring onto the bottom wall of the outer shell a predetermined quantity of a mixture of polyurethane foam-forming reactants; covering the open top of the outer shell with an inner protecting and cushioning layer so as to define a confined space within outer shell; and allowing the mixture of polyurethane foam-forming reactants to foam and completely fill the confined space with polyurethane foam while at the same time forming a direct bond between the foam and the inner cushioning layer over substantially the entire surface of the inner cushioning layer facing the confined space; wherein the predetermined quantity of the polyurethane foam-forming reactants is an amount effective to substantially completely fill the confined space with polyurethane foam and bond the foam with substantially the entire surface of the inner cushioning layer facing the confined space without bleeding therethrough. Foam-layered packaging cases prepared by the method of the present invention are also disclosed.

대표청구항 ▼

[ What is claimed is:] [1.] A foam-layered packaging case comprising:an inner cushioning and protecting fabric layer having a first surface opposite a second surface for receiving an article to be packaged;an intermediate foam layer of an internally blown cellular polyurethane foam having a first su

[ What is claimed is:] [1.] A foam-layered packaging case comprising:an inner cushioning and protecting fabric layer having a first surface opposite a second surface for receiving an article to be packaged;an intermediate foam layer of an internally blown cellular polyurethane foam having a first surface opposite a second surface directly bonded to substantially the entire first surface of said inner cushioning fabric layer without a barrier layer between said first surface of said fabric layer and said second surface of said foam layer and without said foam penetrating through said fabric layer; andan outer shell in direct contact with and surrounding said first surface of said intermediate layer.