Q
polypropylene shrinkage percentage
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Polypropylene (PP) is a thermoplastic polymer widely used in various applications, from packaging to automotive parts. It undergoes a process called shrinkage, where the material contracts as it cools after being molded. The shrinkage percentage can vary but typically ranges from 1% to 2.5% for unfilled PP. Factors influencing this shrinkage include the polymer's grade, the processing conditions such as temperature and pressure, and the part's design, including thickness and geometry. To mitigate undesired effects of shrinkage, careful design adjustments and processing condition optimizations are essential. This way, manufacturers can ensure the dimensional accuracy of the final product.
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