Annealing Plastic Sheet

Rod and sheet present with different stress characteristics due to their unique geometric shapes.

Annealing plastic sheet. The importance of annealing plastic rod and sheet. Annealing plastics can increase the longevity of your machined plastic parts and components saving you time and money. Proper annealing of your plastic rod or sheet is directly related to the quality of the finished machined plastic part. Eden prairie mn 55344 get directions 800 776 7769.

This is an important step of the molding process because most plastic materials are poor conductors of heat which can lead to part damage. Annealing is the process of relieving stresses built up in the materials during processing. Stress can be caused by any process that intrudes heat to a plastic. Generally speaking most stock shapes are annealed after molding using a proprietary stress relieving cycle to minimize any internal stresses that may result from the manufacturing process.

952 934 2303 2018 plastics international. Dmitri kopeliovich annealing of plastics is a heating of a polymeric part to below it s glass transition temperature in order to relieve the internal stresses introduced into the part during its fabrication molding cooling after molding machining welding in order to mold a plastic it is soften by heating and then forced into a cavity where it cools down and shrinks. Annealing acrylic thermoform plastics annealing is the process of relieving stresses in molded or formed plastics by heating to a predetermined temperature maintaining this temperature for a set period of time and slowly cooling the parts sometimes formed parts are placed in jigs to prevent distortion as internal stresses are relieved during. The annealing process is performed on plastics to remove stress that could potentially result in cracking wearing poor chemical resistance or degradation of the performance of the material.

This white paper covers the factors that make necessary the annealing of polycarbonate a plastic material and highlights the problems that may arise if materials are not annealed. Annealing is a stress relief process which allows the material to decompress back to a relaxed state. For example plastic rod reacts in a radial fashion since turned diameters. Many of the high quality materials including engineering plastics and high performance materials are run through a specific annealing process by the manufacturer to reduce internal.

Experience has shown us that very few machined plastic parts require annealing after machining to meet dimensional or performance requirements.