1. High elasticity: low elastic modulus, large elongation deformation, recoverable deformation, and can maintain elasticity in a wide temperature range (-50~150℃).
2. Viscoelasticity: The rubber material is affected by temperature and time when it deforms and recovers, and exhibits obvious stress relaxation and creep phenomena. Under the action of vibration or alternating stress, hysteresis loss occurs.
3. Electrical insulation: Rubber is an electrical insulating material like plastic.
4. There is aging phenomenon: such as metal corrosion, wood decay, and rock weathering, rubber will also experience aging due to changes in environmental conditions, resulting in poor performance and reduced life.
5. It must be vulcanized before it can be used, except for thermoplastic elastomers.
6. A compounding agent must be added.
Other characteristics such as small specific gravity, low hardness, good flexibility, and good air tightness are all valuable properties of rubber.
Indicators to characterize the physical and mechanical properties of rubber:
1. Tensile strength: also known as breaking strength and tensile strength, it refers to the load on the unit section when the test piece is stretched to fracture, the unit is MPa (MPa), and in the past it was kilogram force/square centimeter (kgf/ cm2).
2. Constant elongation stress: formerly known as constant elongation strength, refers to the load per unit area when the sample is stretched to a certain length. The unit of measurement is the same as tensile strength. Commonly used are 100%, 300% and 500% tensile stress. It reflects the ability of rubber to resist deformation by external force.
3. Tear strength: The load per unit thickness when the special test piece (with a cut or right angle) is torn, indicating the tear resistance of the material, and the unit is kN/m.
4. Elongation: When the test piece is broken, the ratio of the elongation to the original length is called the elongation; it is expressed as a percentage.
5. Permanent Deformation: After the specimen is stretched to fracture, the unrecoverable part of the gauge length elongation deformation accounts for the percentage of the original length. After the external force is removed and placed for a certain time (usually 3 minutes), it is expressed in %.
6. Resilience: also known as impact elasticity, refers to the ability of rubber to return to its original state after being impacted, expressed in %.
7. Hardness: Indicates the ability of rubber to resist the intrusion of external force, which is commonly measured by Shore hardness tester. The hardness range of rubber is generally between 20 and 100, and the unit is Shore A.
Disclaimer: The picture materials and articles on this platform come from the Internet, so the copyright belongs to the original author. If there is any infringement on your copyright and interests, please contact us, we will apologize and delete it quickly. Article source: Rubber Technology Network
Latest news
- The Combination and Foaming Process of
- Famous tire enterprise with multiple d
- Ministry of Commerce Initiate a final
- The Effect of Carbon Black on the Cutt
- Stop work orders encounter rising pric
- Lanzhou Petrochemical's carboxylated n
Contact us
- ADD: Room 4210, CEC Business Hall, No. 121-4, Nanjing South Street, Heping District, Shenyang
- TEL: 13644907299
- FAX: 024-25361668
- E-mail: boss@long-green.cn
> Industry newsCharacteristics of rubber materials
2022-08-23
PREVIOUS：Scorched rubber treatment method!
NEXT：Misunderstood vacuum tire