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| The Manufacturing Process Pyramid Inc. utilizes only the finest polyurethane (urethane) elastomers selected specifically for drive belt applications. In-house tests are conducted on these elastomers prior to their acceptance and then again during processing so that we remain confident they meet our stringent requirements. We produce all of the extrusions that go into the making of Pyrathane® belts which is where the process begins. Polyurethane is extruded in the desired round or flat cross sectional shape using material which provides the desired physical properties. This extruded material is then cut to a specified length and the ends are thermally welded together. Our welding process molecularly bonds the cut material into an endless belt, producing welds that achieve tensile strengths that nearly match that of the base material. The last step in our process is the removal of a small bead of material which is formed around the belt's cross section during the welding process. This bead is ground away creating a small scuffed area which usually is only visibly detectable and does not effect the performance of the finished belt. Pyramid's quality inspection procedures Pyrathane® is Pyramid Inc.'s registered trade name for its polyurethane elastomer endless stretch belts and cord. |
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