Heat-shrinkable sheet
AssigneeSekisui Kaseihin Kogyo Kabushiki Kaisha
InventorsMasahiro Tsubone, Keizo Ono, Tohimasa Ito
Life of this patent
Estimating the term…
Abstract
A heat-shrinkable sheet made of a foamed thermoplastic resin having a number of cells and which is adapted to cover a fragile container such as a glass bottle, is heat-shrunk so that said sheet can stick to the container. The cells of the sheet are burst, i.e., opened or collapsed, so that the surface of the sheet which contacts the surface of a container is formed in a convexo-concave surface, which facilitates the entry of boiling water or cooling water between the sheet and the surface of the container when the sheet is adhered to the container.
Claims10
A heat-shrinkable sheet comprising a sheet of a foamed thermoplastic resin at least one side of which has a convexo-concave surface having convex and concave portions formed by opened cells or by opened cells and collapsed cells of the foamed sheet.
A container comprising a rigid substrate and, tightly contacting at least a portion of the outer surface of said substrate, a heat-shrunk sheet formed from a heat-shrinkable sheet comprising a foamed thermoplastic resin sheet, the side of which is in contact with said rigid substrate having a convexo-concave surface formed of open and/or collapsed cells of said foamed thermoplastic resin sheet.
Dependencies are inferred from the claim text.