TPE Test/Analysis Methods of Our Graus R&D Laboratory

Graus R&D Laboratory TPE Test/Analysis Methods

HARDNESS TEST

-Test Standard: ASTM D 2240

-Purpose: The hardness of thermoplastic elastomers is determined in Shore A and Shore D units.

-Test Equipment: Shore durometer (A & D)

DENSITY MEASUREMENT

-Test Standard: ASTM D 792

-Purpose: The specific gravity of thermoplastic elastomers (TPE) and other solid-form polymers is calculated using alcohol.

-Test Equipment: Analytical Balance and Density Kit

COMPRESSION SET TEST

-Test Standard: ASTM D 395 – Method B

-Purpose: The material's ability to recover its elastic properties after the application of force for specific durations and temperatures is measured. The residual permanent deformation is measured after applying a specific amount of pressure at a known temperature and duration.

-Test Equipment: Compression Set Apparatus

TENSILE STRENGTH AND ELONGATION TESTS

-Test Standard: ASTM D 412

-Purpose: The elastic and plastic behaviors of thermoplastic elastomers under static load are determined.

-Test Equipment: Extensometer

MELT FLOW INDEX (MFI)

-Test Standard: ASTM D 1238

-Purpose: The melt flow index of a molten thermoplastic elastomer is measured. -Test Equipment: MFI Tester

COLOR MEASUREMENT (L* a* b*)

-Test Standard: -

-Purpose: Measures lightness/darkness (L* value), red-green value (a* value), and yellow-blue value (b*) for thermoplastic elastomers.

-Test Equipment: Colorimeter

TEAR TEST

-Test Standard: ASTM D 624

-Purpose: Measures the tear resistance of thermoplastic elastomers.

-Test Equipment: Extensometer