Method of forming a partially perforated foam
AssigneeSealed Air Corporation (US)
InventorsShau-Tarng Lee, Maurizio Brandolini
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Abstract
A method for accelerating the release of a flammable blowing agent from an expanded foam is disclosed. According to the method, an expanded foam structure is perforated to form a first series of channels extending partially through its thickness from a first surface and a second series of channels extending partially through its thickness from a second surface opposite the first surface. The channels provide paths enabling the blowing agent to escape more rapidly from the interior of the expanded foam structure.
Claims9
A method for providing accelerated release of a blowing agent from an expanded foam structure, comprising
- providing an expanded foam structure having first and second surfaces separated by a predetermined dimension, said foam structure having said blowing agent therein;
- perforating said foam structure to form a first series of channels extending from said first surface toward said second surface, said first series of channels having a length of up to about 50 percent of said predetermined dimension;
- and
- perforating said foam structure to form a second series of channels extending from said second surface toward said first surface, said second series of channels having a length of up to about 50 percent of said predetermined dimension, said second series of channels being formed so as to not connect with said first series of channels.
Dependencies are inferred from the claim text.