Orthopedic cushion and method for production thereof

摘要

The invention relates to an orthopedic cushion made from a filled elastomer or softened thermoplastics and can be provided with a thin friction-reducing coating made from a non-polar, non-hydrophilic slip-increasing polymer coating namely poly(para-xylene). According to the invention, the above can be achieved by means of a method in which the polymerized polyurethane cushion is subjected to at least one pretreatment step in which volatile components are removed to such an extent as to be able to be immediately coated.

主权项

1. A process for producing an orthopedic cushion which has a friction-reducing coating, comprising:
subjecting an orthopedic cushion material which is made of a filled elastomer, an elastomer gel, a plasticized thermoplastic, or a polyurethane to at least one pre-treatment step in the form of a vacuum treatment or a drying process in which volatile constituents present in the cushion material are extracted out of a surface of the cushion material without extracting across an entire volume of the cushion material an amount of additives and auxiliaries that are needed for mechanical serviceability of the cushion, wherein the volatile constituents include at least one selected from the group consisting of additives, solvents, auxiliaries, processing aids, monomers and water; subsequently coating the cushion with a nonpolar polymer coating which increases slip capability, wherein the coating is applied using a chemical vapor-phase deposition (CVD) or physical vapor-phase deposition (PVD) process.