Overview
SIST EN ISO 60:2023 specifies a standardized method for determining the apparent density of loose plastics materials-such as powders or granules-that can be poured from a specified funnel. Developed by CEN in coordination with ISO, this standard allows manufacturers, laboratories, and quality assurance professionals to measure the mass per unit volume (apparent density) of pourable plastics materials, supporting consistent product quality and reliable characterization. The method outlined in SIST EN ISO 60:2023 is recognized and harmonized across Europe and internationally.
Key Topics
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Apparatus Requirements:
- Use of a balance accurate to 0.1 g for weighting samples.
- A measuring cylinder of specified dimensions (100 ml capacity, internal diameter of 45 ± 5 mm).
- A standard funnel with defined shapes and dimensions to ensure consistent pouring.
- A straightedge blade for leveling material in the measuring cylinder.
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Testing Procedure:
- The material sample is poured from the funnel into the measuring cylinder.
- Two determinations are performed to ensure accuracy.
- Test samples must not be reused to avoid influencing results.
- Adjustments for challenging samples (e.g., adding small amounts of antistatic agents if flow is hindered by electrostatic charge).
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Result Reporting:
- Results are expressed as grams per milliliter (g/ml).
- The mean of two test results is taken to two significant digits.
- The test report includes all relevant details, such as material identification, individual results, any additives used, statistical data if required, observations, and the test date.
Applications
The determination of apparent density using the SIST EN ISO 60:2023 standard is crucial for several practical reasons:
- Quality Control: Ensures batch-to-batch consistency in the production of plastic powders and granules by verifying density characteristics.
- Material Characterization: Apparent density helps in assessing the 'bulkiness' or handling properties of plastics materials, important for storage, packaging, and transport.
- Process Optimization: Accurate density data supports material dosing, mold design, and process efficiency in injection molding, extrusion, and compounding operations.
- R&D and Compliance: Laboratories and material developers use standardized density measurement for research, product development, and compliance with regulations or customer requirements.
This standard is particularly relevant for producers, processors, and users of thermosetting plastics, as referenced by ICS 83.080.10.
Related Standards
- ISO 61: For materials that cannot be poured from the specified funnel, ISO 61 provides an alternative method for determining the apparent density.
- Other relevant plastics testing standards: EN ISO 178 (Flexural properties), EN ISO 1133 (Melt flow rate) are frequently used alongside EN ISO 60 for comprehensive polymer characterization.
- Quality Management Standards: EN ISO 9001 leverages standardized testing methods like EN ISO 60 to ensure consistency and traceability in quality-critical processes.
By following SIST EN ISO 60:2023, organizations ensure reliable and repeatable measurement of apparent density for pourable plastics materials, facilitating international trade, reducing variability, and supporting product compliance across global markets.
