Composite materials of silicone elastomers and polyolefin films, and method of making
AssigneesCanton Bio-Medical Products, Inc., Visilox Systems, Inc.
InventorsRobert H. Goodale, James M. DuJack
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Abstract
Composite materials formed of bonded silicone elastomers and polyolefin films, for uses including catheters, closures for piercing by medical needles, and medical containers, the bonding between the normally inert unbondable materials being accomplished by corona discharge treatment of the polyolefin film and the use of an ethyl silicate, ethyl ortho silicate and tetra butyl titanate solution primer on the treated polyolefin adjacent the uncured silicone elastomer such that the materials may be securely bonded one to the other by curing through the application of heat and pressure.
Claims10
A method of chemically bonding elastomeric materials to chemically inert polyolefins, the method comprising:
- exposing a chemically inert polyolefin surface to a corona discharge treatment,
- applying to the corona discharge treated surface of the polyolefin a primer solution of ethyl silicate, ethyl ortho silicate and tetra butyl titanate in an organic solvent,
- placing the treated and primed surface of polyolefin in contact with the surface of an uncured elastomeric compound of molecular weight above 61,000 with a minimum elongation modulus of fifty percent;
- and
- applying heat to the composite material to cure the elastomeric compound while pressing the polyolefin elastomeric compound article firmly together, whereby upon curing of the elastomeric material the polyolefin will be firmly and securely bonded thereto.
Dependencies are inferred from the claim text.