1. High elasticity: low elastic modulus, large elongation deformation, recoverable deformation, and can maintain elasticity in a wide temperature range (-50~150℃).
2. Viscoelasticity: rubber materials are affected by temperature and time when deforming and recovering, showing obvious stress relaxation and creep phenomena, and producing hysteresis loss under vibration or alternating stress.
3. Electrical insulation: rubber is an electrical insulating material like plastic.
4. Aging phenomenon: Like metal corrosion, wood decay, and rock weathering, rubber will also age due to changes in environmental conditions, causing performance deterioration and reduced life.
5. Must be vulcanized before use, except for thermoplastic elastomers.
6. Compounding agents must be added.
Other characteristics such as low specific gravity, low hardness, good softness, and good air tightness are all valuable properties of rubber.