Huanren Lab

 Project Introduction

Hardness is a mechanical property that measures the degree of material software, and almost all materials will produce plastic deformation. Hardness testing is simple in equipment and convenient and fast in operation, so it is widely used and can be regarded as non-destructive testing. The hardness test methods include pressing and scribing, which include Brinell hardness, Shore hardness, Rockwell hardness, Vickers hardness, microhardness and Mohs hardness.

The mechanical properties of materials refer to the mechanical characteristics that materials exhibit when they are subjected to various external loads (tension, compression, bending, torsion, impact, alternating stress, etc.) under different environments (temperature, humidity, and medium).

Mechanical properties

Mechanical properties are the ability of polymer materials to resist deformation and fracture.

Elasticity: the ability of the material to maintain and restore its inherent shape and size under external forces;

Plasticity: It is the ability of a material to undergo irreversible permanent deformation under the action of external forces;

Strength: It is the resistance of a material to deformation and fracture;

Hardness: refers to the ability of a material to resist pressing into its surface by other harder objects;

Lifespan: refers to the ability of a material to resist damage and failure under the long-term or repeated action of external forces;

Failure: The material is in service under load and environment, cannot resist deformation and fracture, and loses its intended efficiency and is damaged.

Hardness of commonly used polymer materials

Method standards

GB-T 2411-2008 Plastic Shore Hardness Test Method

GB/T 531.1-2008 Vulcanized rubber or thermoplastic rubber-Part 1: Shore hardness meter method

EN ISO 868-2003 Plastics and hard glue. Determination of needle hardness with hardness meter [SHORE hardness]

ASTM D2240 Rubber Shore hardness test method