Metal detectable polyurethane film
OwnerStephen Hurstinventor
Life of this patent
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Abstract
A metal and X-Ray detectable polyurethane film having metallic particles blended into the polyurethane when in a liquid form and then having the film extruded so as to fully embed the metallic particles, such as iron oxide, across all areas of the film, which can be used in protective clothing, such as reusable aprons and sleeve covers, for example, in food processing applications. In this manner, the film permits easy detection, and thus removal of, damaged film portions that become detached from the protective garment and inadvertently introduced into the food being processed, before the final processing and packaging thereof.
Claims5
A method for manufacturing a metal detectable polyurethane film, the method comprising:
- compounding polyurethane and metallic particles in a compounder to pelletize the resin and the metallic particles as polyurethane pellets;
- blending and heating a ratio of the polyurethane pellets and additives in a batch blender for a selected period to form a blended mixture liquid film, the additives in the blended mixture liquid film being selected from the group consisting of resins, barium lubricants, pigments, chromium, silicon, carbon, titanium, calcium, and colorants;
- vacuum loading the blended mixture liquid film into a drying hopper;
- dehumidifying the blended mixture liquid film in the drying hopper at an elevated temperature to reach a selected dew point;
- and
- extruding the blended mixture liquid film through an extruder.
Dependencies are inferred from the claim text.