Articles including microcellular foam materials as components thereof
AssigneeRexam Release, Inc.
InventorLeRoy H. Keiser
Life of this patent
Estimating the term…
Abstract
The invention is directed to a variety of articles which include a sheet of microcellular foam material. Exemplary articles include release liner sheets, face stock, label stock, and the like. The cell density of the sheet of microcellular foam material lies in a range from about 10.sup.9 to about 10.sup.15 cells per cubic centimeter of the sheet, and the average size of the cells is less than about 10 microns. The invention also provides processes for the manufacture of articles which include a sheet of microcellular foam material as a component thereof.
Claims14
A release liner sheet consisting essentially of:
- a sheet of microcellular foam material having a plurality of cells distributed substantially uniformly throughout said sheet, the cell density of said cells in said sheet lying in a range from about 10.sup.9 to about 10.sup.15 cells per cubic centimeter and the average size of said cells being less than about 10 microns;
- and
- a release material on a surface of said sheet.
A release liner sheet comprising:
- a sheet of microcellular foam material having a plurality of cells distributed substantially uniformly throughout said sheet, the cell density of said cells in said sheet lying in a range from about 10.sup.9 to about 10.sup.15 cells per cubic centimeter and the average size of said cells being less than about 10 microns, said microcellular foam material comprising a copolymer of a release agent with a thermoplastic polymer;
- and
- a release material on a surface of said sheet.
Dependencies are inferred from the claim text.