COEXTRUSION DIE AND SYSTEM, METHOD OF MAKING COEXTRUDED ARTICLES AND COEXTRUDED ARTICLES MADE THEREBY
First Claim
1. An extrusion die for co-extruding a first molten polymeric material and a second molten polymeric material, the die comprising:
- a first die portion;
a second die portion; and
a shim separating the first die portion and the second die portion, the shim having a first side and a second side, the first side of the shim forming a boundary of the first die portion and defining a first die cavity, the second side of the shim forming a boundary of the second die portion and defining a second die cavity, a dispensing edge comprising a plurality of first and second extrusion openings, a plurality of first feed channels connecting the first die cavity to the first extrusion openings along the dispensing edge, and a plurality of second feed channels connecting the second die cavity to the second extrusion openings along the dispensing edge, the first and second extrusion openings arranged along the dispensing edge to provide;
(a) an interfacial zone comprising portions of first extrusion openings disposed between portions of second extrusion openings,(b) a first continuous zone comprising portions of the first extrusion openings arranged in side-by-side relation to each other, and(c) a second continuous zone comprising portions of the second extrusion openings arranged in side-by-side relation to each other,wherein, the interfacial zone is disposed between the first continuous zone and the second continuous zone.
1 Assignment
0 Petitions
Accused Products
Abstract
An extrusion die (20) and method for co-extruding a first molten polymeric material and a second molten polymeric material. The die includes a first die portion (20), a second die portion and a shim separating the first die portion and the second die portion. The shim has a first side and a second side, the first side of the shim forming a boundary of the first die portion and defining a first die cavity (38), the second side of the shim forming a boundary of the second die portion and defining a second die cavity (40). A dispensing edge (36) is provided having a plurality of first and second extrusion openings, a plurality of first feed channels connecting the first die cavity to the first extrusion openings along the dispensing edge, and a plurality of second feed channels connecting the second die cavity to the second extrusion openings along the dispensing edge. The first and second extrusion openings arranged along the dispensing edge to provide an interfacial zone having portions of the first extrusion openings disposed between portions of the second extrusion openings. The die is used in an extrusion system and a method for making a multilayered article.
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Citations
25 Claims
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1. An extrusion die for co-extruding a first molten polymeric material and a second molten polymeric material, the die comprising:
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a first die portion; a second die portion; and a shim separating the first die portion and the second die portion, the shim having a first side and a second side, the first side of the shim forming a boundary of the first die portion and defining a first die cavity, the second side of the shim forming a boundary of the second die portion and defining a second die cavity, a dispensing edge comprising a plurality of first and second extrusion openings, a plurality of first feed channels connecting the first die cavity to the first extrusion openings along the dispensing edge, and a plurality of second feed channels connecting the second die cavity to the second extrusion openings along the dispensing edge, the first and second extrusion openings arranged along the dispensing edge to provide; (a) an interfacial zone comprising portions of first extrusion openings disposed between portions of second extrusion openings, (b) a first continuous zone comprising portions of the first extrusion openings arranged in side-by-side relation to each other, and (c) a second continuous zone comprising portions of the second extrusion openings arranged in side-by-side relation to each other, wherein, the interfacial zone is disposed between the first continuous zone and the second continuous zone. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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4. (canceled)
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24. An adhesive article, comprising:
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an extruded pressure sensitive adhesive material layer having a first major surface and a second major surface, the second major surface having a microstructure provided by an extrusion die; and an extruded release liner comprising a polymeric material layer having a first major surface and a second major surface, the first major surface of the release liner being releasably affixed to the second major surface of the pressure sensitive adhesive material and the first major surface of the release liner having a microstructure complimentary to the microstructure of the second major surface of the pressure sensitive adhesive material layer; wherein, the microstructure on the first major surface of the extruded release liner will retain its microstructure when heated to the melting temperature of the first polymeric material.
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25-32. -32. (canceled)
Specification