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Home > Dangerous Goods Packagings > Verification of the suitability of alternative plastics moulded materials > Test procedures and requirements
The following tests for the comparison of the HDPE grades are performed according the Dangerous Goods Rule 003 (BAM-GGR 003). The named tests are not only for grades of HDPE but also for additional polymeric materials applicable.
In the comparison of the material parameters specifies A the particular material parameter of the approved HDPE grade of the original design type and B the material parameter of the alternative HDPE grade.
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| Test method | Bild |
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| The production of squeeze plates with various thicknesses is performed in compliance with the press conditions specified in the above named standard. Test pieces are taken from the pressed plates and used to determine the material characteristics. |
Bucher plastics press KHL 100, for manufacturing plate-like semi-finished products using thermoplastic plastics |
| Test method | Image |
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Relative density D at 23°C is determined using the buoyancy method. The test material used consists of tempered sections from the mid area of the squeeze plate, plate thickness s = (4 ± 0.2) mm. Specification BAM – GGR 003:
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The melt-flow index MFR is determined at 190°C using a predefined load. The test material consists of the granular material in its supplied condition and stamped sections having an edge length of l ≤ 4 mm from the squeeze plate, plate thickness s = variable. Specification BAM – GGR 003:
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Zwick 4106 mass-flow tester for determining the mass-flow rate of plastics |
| Test method | Image |
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Impact strength acN is determined using the Charpy impact strength method in compliance with ISO 179/1eA at -30°C. The type 1 test specimens with a single notch A are taken from the middle area of the squeeze plate using a metal cutting method; plate thickness s = (4 ± 0,2) mm. Specification BAM GGR 003: acNB ≥ acNA - 10 % |
Zwick 5113.300 pendulum impact tester with semiautomatic constant-temperature/feeder unit for determining the impact strength of plastic materials |
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Stress crack sensitivity FNCT is determined in a creep rupture test using a specimen C in a 2 % by weight solution of Akropal N100 in water at 50 °C and with a tensile stress of approx. σ = (9 ± 2) MPa. The calculation for the actual load is performed following a microscopic assessment of the fracture surfaces of the test specimen. The type C test specimens are cut from the middle area of the squeeze plate with thickness s = (6 ± 0.2) mm, and notched all around using a razor blade. Specification BAM - GGR 003: FNCTB ≥ FNCTA - 20 % |
Frank creep rupture test facility, for determining stress crack sensitivity (FNCT) in plastic materials
Facility for applying notches to specimens made of plastic
Fracture surfaces of the specimens subjected to the creep rupture test (FNCT) |
| Test method | Image |
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To determine sensitivity towards oxidative degeneration Ox, specimens are subjected to method C1 - Measurement of melt-mass flow rate MFR (melt-flow index) before and after storage of the specimens using a 55% nitric acid at 40 °C. The test conditions for determining the MFR in compliance with DIN EN ISO 1133 - temperature and load - are set in agreement with the granulate that is tested beforehand. The test specimens used consist of two squeeze plates each, plate thickness s = (2 ± 0.2) mm. Specification BAM – GGR 003: OxB ≤ OxA + 20 % |
Specimen storage for specimens to be used for determining sensitivity towards oxidative degradation |
