**A Comprehensive Guide to Testing TPE Material Hardness: 9 Key Methods and Practices**
Time of issue:2025-03-13
The hardness of TPE materials is one of the most critical physical properties. Different hardness levels affect the material's tactile feel, strength, vibration damping, and ultimately determine its applications. For new product sampling, how do you test TPE hardness? Here, Subo Technology explains the testing methods:
Key Considerations for New Users: Always confirm the hardness unit specified by the customer. Some clients may reference PVC hardness values, which differ significantly from TPE hardness in both measurement and interpretation.
Testing Methods for TPE Hardness: Most TPE materials use Shore durometers for hardness testing, with the Shore A scale being the most common. The Shore A durometer features a blunt indenter and medium - tension spring. It measures penetration depth from 0 to 0.100 inches:
0 reading: Maximum penetration depth
100 reading: No penetration
For hardness values above Shore A90, the Shore D durometer is more appropriate. It uses a sharper indenter and stiffer spring for accurate measurements in semi - rigid materials.
Testing Protocol: While materials resist initial pressure, creep and relaxation cause gradual deformation over time. Hardness readings can be taken immediately or after a 5 - 10 second delay:
Immediate readingstend to show higher (harder) values
Delayed readings(5 - 10 seconds) provide more accurate results by accounting for viscoelastic behavior
Reading Interpretation: As shown in the diagram, the pointer indicates the material's hardness value. Higher numbers correspond to greater hardness.
