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Polyurethane shrinkage percentage.
You can expect a mold shrinkage percentage of between 0.
Polyurethane shrinkage percentage. 6% Mar 17, 2021 · The size shrinkage of cast polyurethane products is mainly based on the following two reasons. When the pouring material changes from liquid to solid, the molecular cohesion increases, which makes the product size smaller. MD 0. 5% / TD 0. 0 shows total shrinkage for TPU grades in relation to wall thickness and Shore hardness. Plastic Shrinkage rate is a volume contraction rate of polymers from the melt state and the cooled condition that will determine the molding parts dimension and accuracy, it is expressed in percent. Total shrinkage is a result of molding shrinkage and post-shrinkage. This can occur during annealing and also during the longer-term storage of parts. 3-0. 4% and 1. This chart outlines typical mold shrink rates, as well as tonnage recommendations and vent depth values for commonly used plastic materials. Jul 13, 2025 · Get information on shrinkage of plastics and learn why it is important to determine the molding shrinkage ratio of plastic. 4% depending on the hardness of the TPU being used and the wall thickness of the part being made. For this reason it is dificult to predict shrinkage with any great accuracy. . 4-0. Figure 7. You can expect a mold shrinkage percentage of between 0. pesyindvnisqhuhhktaexxafmsljlsjigrphzmkbrrpt