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Testing thermoplastic & curable molding materials

A key aspect of the characterization of molding materials is the inter-laboratory reproducibility of test results. The machining of specimens, specimen shapes, and test sequences are all specified in detail in the respective test standards. Tensile tests on plastics according to ISO 527 or ASTM D638, flexure tests according to ISO 178 or ASTM D790 are a few important examples. Both the repeatability and traceability capabilities, which ensure reliable test results, are subject to strict requirements. In the area of quality control , the development of properties over time and compliance with specified tolerances are the essential evaluation standards.

Some of the most important tests on thermoplastic and curable molding materials and associated test standards can be found in the following overview:

Quasi-static tests Tests at high strain rates Creep tests Melt flow index/ HDT VST / hardness

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Quasi-static tests

ISO 527-1 & ISO 527-2: Tensile tests on plastics
Plastics | Tensile test
ISO 527-1, ISO 527-2
to Tensile test ISO 527-1/-2
Tensile properties determined with tensile test on plastics to ASTM D638
Plastics | Tensile test
ASTM D638
to Tensile properties ASTM D638
3-point bend test plastics ISO 178
Plastics | 3-point flexure test
ISO 178
to 3-point bend test ISO 178
ASTM D790: ZwickRoell test fixture for the 3-point flexure test plastics
Plastics | 3-point flexure test
ASTM D790
to 3-point flexure test ASTM D790

Tests at increased and high strain rates

ISO 179-1 & ISO 179-2: Charpy impact strength and notched impact strength
Plastics | Impact strength Charpy
ISO 179-1, ISO 179-2
to Charpy impact strength, notched impact strength ISO 179-1 ISO 179-2
ASTM D256: Izod impact test, pendulum impact resistance of plastics
Plastics | Impact strength Izod
ASTM D256
to Notched Izod Impact Strength ASTM D256
Flexural impact test Plastics IZOD ISO 180
Plastics | Impact strength Izod
ISO 180
to Izod impact strength Notched impact strength ISO 180
Tensile impact tests on plastics to ISO 8256 and ASTM D1822: test arrangement method A
Plastics | Impact test, tensile
ISO 8256, ASTM D1822
to Tensile impact tests to ISO 8256, ASTM D1822
Tensile Tests on Plastics at High Strain Rates to ISO/CD 22183, ISO 18872, SAE J 2749
Plastics | Tensile test at high strain rates (high-speed tensile test)
ISO 18872, ISO 18989 (draft), VDA 287, SAE J2749
Crash simulation
to Tensile testing at high strain rates ISO/CD 22183, ISO 18872, SAE J 2749
Puncture test on test plates to ISO 6603-2, ISO 7765-2, ASTM D 3763
Plastics | Puncture test on test plates
ISO 6603-2, ASTM D3763
to Puncture test on test plates ISO 6603-2, ISO 7765-2, ASTM D3763

Creep tests

Tensile creep test and compressive creep test on plastics
Plastics | Creep tests
ISO 899-1, ISO 899-2, ASTM D2990, ISO 16770
to Creep test ISO 899 ASTM D2990

Rheological and thermal properties, hardness

MVR test plastics, MFR test plastics and additional characteristic values of the melt flow test
Plastics | MFR & MVR determination, general information
MFR and MVR tests and other characteristic values of melt flow tests on plastics
Overview of the melt flow test incl. definition of the test methods for MFR and MVR tests and determined characteristic values, comparison between the test methods and standards ISO 1133, ASTM D1238 and ASTM D3364.
to MFR and MVR Test
ASTM D1238 & ASTM D3364 determination of melt flow rate MVR, MFR and FRR
Plastics | Melt flow test (MFR, MVR, FRR)
ASTM D1238, ASTM D3364
Determination of melt mass-flow rate (MFR), melt volume-flow rate (MVR), flow rate ratio (FRR)
to Determination of melt flow rate ASTM D1238
ISO 1133-1 and ISO 1133-2: Melt flow index testing plastics MFR / MFI & MVR
Plastics | Melt flow test (MFR, MVR)
ISO 1133, ISO 1133-1, ISO 1133-2
Determination of melt mass-flow rate (MFR or MFI), melt volume-flow rate (MVR)
to Melt flow index test ISO 1133
Heat deflection temperature: heat deflection temperature according to ASTM D648 and ISO 75: detailed view of 3-point bending die with specimen
Plastics | heat deflection temperature
ASTM D648, ISO 75 (part 1 to 3)
to Heat deflection temperature ASTM D648 ISO 75
Test method according to ISO 306 and ASTM D1525 for determining the Vicat softening temperature, specimen and Vicat needle in detail view
Plastics| Vicat softening temperature VST
ISO 306, ASTM D1525
to Vicat softening temperature
Close-up of a plastic hardness test according to ASTM D785 & ISO 2039-1/-2 using a Rockwell hardness tester from ZwickRoell
Plastics | Hardness Ball Indentation & Rockwell
ASTM D785, ISO 2039-1, ISO 2039-2
to Hardness Testing
Portable durometer / Shore hardness tester for Shore hardness testing according to ASTM D2240
Plastics | Hardness Shore
ISO 48-4, ASTM D2240
to Shore hardness test
IRHD hardess tester
Plastics | IRHD hardness
ASTM D1415, ISO 48-2
to ASTM D1415 | ISO 48-2 IRHD hardness testing

Automation possibilities in the characterization of molding materials

Automated characterization of molding materials is used in particular in the research and development sector, where statistically reliable material characteristic values are required. Robotic testing systems are available in different task-specific versions.

The automated testing system features a specimen magazine and can also be used for tests in temperature chambers. To expand you testing capacity, you can integrate multiple machines, for example, for tensile and flexure tests, impact tests or hardness testing.

Automated testing systems Why automate? Contact us

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