Meaning
Testing standards specify the displacement of liquids to determine the mass per unit volume of non-cellular plastics. Molders use density iso 1183 to verify polymer consistency, detect voids, and calculate the part weight of molded components. This measurement ensures that incoming raw materials match the material datasheet specifications.
Measurement Method
Laboratory testing involves either immersion methods or density gradient column techniques to analyze the plastic specimen. Under density iso 1183, a specimen is weighed in air and then in a liquid of known density to calculate its volume. This procedure requires precise temperature control because density values are highly sensitive to thermal fluctuations.
Quality Control
Production consistency relies on tracking material density to detect contamination or changes in crystallinity. The density iso 1183 standard helps identify when regrind has been mixed incorrectly with virgin resin. Variations in density often correlate with changes in tensile strength, shrinkage, and impact resistance of the finished plastic part.
Economic Calculation
Molders depend on accurate density measurements to convert raw material weight into part volume and piece count. Applying density iso 1183 yields the precise volume needed to optimize resin purchases and minimize plastic waste. Correct values prevent the overfilling of mold cavities and reduce the occurrence of flash during high-pressure injection cycles.
This is particularly valuable when managing high-volume automotive molding runs where material costs dominate the unit price and fraction-of-a-cent savings determine profitability.
