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In the production processes of Chinese rubber parts factories and Vietnamese rubber parts factories, to ensure the stable performance of products during transportation and service life, special attention is paid to anti-aging formulas and storage environment control.
1. What is Rubber Aging? What are Its Surface Signs?
During the processing, storage, and use of rubber and its products, the physical, chemical properties, and mechanical performance of rubber will gradually deteriorate due to the combined effects of internal and external factors, eventually losing its usability. This change is called rubber aging. Its surface signs include cracking, stickiness, hardening, softening, pulverization, discoloration, and shape expansion.
2. What are the Factors Affecting Rubber Aging?
The causes of rubber aging are as follows:
(a) Oxygen: When rubber comes into contact with oxygen, molecular chain reactions occur, leading to chain breakage or excessive cross-linking, thereby changing its performance. Oxidation is an important cause of rubber aging.
(b) Ozone: Ozone, which has higher chemical activity, can also damage molecular chains. Especially when rubber is in a deformed state, vertical cracks will form, known as "ozone cracking".
(c) Heat: Increasing the temperature will accelerate the oxidation rate. Many rubber parts manufacturers (including factories in China and Vietnam) conduct heat aging tests to ensure that products maintain elasticity and strength even in high-temperature environments.
(d) Light: Ultraviolet rays can directly break molecular chains or induce oxidation reactions, which mainly occur on the surface layer of rubber.
(e) Mechanical stress: Repeated stress causes damage to molecular chains and triggers oxidation reactions.
(f) Moisture: Moisture can dissolve hydrophilic groups in rubber, accelerating its aging.
In addition, other factors include chemical media, metal ions, high-energy radiation, electrical energy, and biological factors.
High-quality Vietnamese rubber parts factories usually conduct experimental simulations of these factors according to the application scenarios of different customers to control the aging rate from the source.
3. What are the Categories of Rubber Aging Test Methods?
(a) Natural aging test methods: Including atmospheric aging, natural storage aging, underground aging, biological aging, etc.
(b) Artificial accelerated aging test methods: Including heat aging, ozone aging, light aging, artificial climate aging, biological aging, high-energy radiation aging, etc.
In the industry, Chinese rubber parts factories that have CNAS laboratories are equipped with complete artificial accelerated aging testing capabilities to meet the testing needs of high-standard customers in automotive, electronics, industrial sealing, and other fields.
4. Temperature Selection for Rubber Hot Air Aging Test
For natural rubber, the test temperature is usually 50–100℃; for synthetic rubber, it is 50–150℃.Examples:
Nitrile rubber: 70–150℃
Fluorosilicone rubber: 200–300℃
Vietnamese rubber parts factories usually adopt medium-to-high temperature range tests when exporting to European and American markets, while Chinese rubber parts factories implement more precise heat aging grading control according to different application scenarios (such as automotive sealing rings, electronic shock absorbers) to ensure compliance with international quality standards.
In the production processes of Chinese rubber parts factories and Vietnamese rubber parts factories, to ensure the stable performance of products during transportation and service life, special attention is paid to anti-aging formulas and storage environment control.
