Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – By calendering
Reexamination Certificate
2005-10-18
2010-12-21
Johnson, Christina (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
By calendering
C264S048000
Reexamination Certificate
active
07854871
ABSTRACT:
The present invention provides a method for producing a polyolefin-based resin crosslinked foamed sheet which is excellent in heat resistance and flexibility, has a small diameter of cells, can be developed in various utilities, and is excellent in vacuum moldability. The method for producing a polyolefin-based resin crosslinked foamed sheet according to the present invention comprises the steps of supplying a foamed sheet with closed cells, comprising a polyolefin-based resin, to a gap between one pair of rolls which have different circumferential speeds, and are rotated so that rotation directions on facing surfaces are the same direction, and applying a compression force and a shear stress to the foamed sheet with closed cells simultaneously to rupture a part of closed cells of the foamed sheet with closed cells to communicate closed cells into open cells.
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Geraedts Patrick
Matsumura Michio
Roegies Patrick
Hauth Galen
Johnson Christina
Sekisui Chemical Co. Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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