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US 8,679,607 B2Granted
Foamable article
Assignee3M Innovative Properties Company
InventorsJeffrey L. Hamer, Alan R. Seville, Kenneth F. Teeters
Life of this patent
Estimating the term…
Abstract
A foamable article is disclosed. The article includes a substrate and an outer layer covering at least a portion of the substrate and including an unactivated expandable sphere foaming agent and an unactivated chemical foaming agent. The unactivated foaming agents may be activated to increase the volume of the outer layer.
Claims12
An article comprising:
- an elongate core comprising a first material and having first and second ends and an outer major surface;
- and
- an outer layer comprising a second material and covering at least a portion of the outer major surface of the elongate core, the second material comprising an unactivated expandable sphere foaming agent and an unactivated chemical foaming agent;
- wherein the unactivated foaming agents may be activated to increase the volume of the outer layer, and the core exhibits a stiffness that is greater than a stiffness of the outer layer.
1 more element
An article comprising:
- a substrate comprising a first material and having a major surface;
- and
- an outer layer comprising a second material and covering at least a portion of the major surface of the substrate, the second material comprising an unactivated expandable sphere foaming agent and an unactivated chemical foaming agent;
- wherein the unactivated foaming agents may be activated to increase the volume of the outer layer, and wherein the substrate exhibits a stiffness that is greater than a stiffness of the outer layer.
1 more element
Dependencies are inferred from the claim text.