Page 72 - 《橡塑技术与装备》2017年17期（9月橡胶版）

橡塑技术与装备（橡胶） CHINA RUBBER/PLASTICS TECHNOLOGY AND EQUIPMENT (Rubber)

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Influence factors of hardness of EPDM foaming vibration products and
relationship with springrate ratio

Wang Qiaoling, Ji Chengyuan, Zhao Yang, Gao Guangtao
（Qingdao University of Science & Technology, Qingdao 266042, Shandong,China）

Abstract: This paper explored the relationship of EPDM foaming material between the hardness and
springrate ratio by experiment, discussed the relation between the stiffness and foaming material vibration
performance. It is found that Mooney viscosity, hardness, and crosslinking density decreased gradually with
the increase of dosage of paraffin oil; The foaming materials is best, springrate ratio is smaller, when paraffin
oil consumption is 15 phr; Dosage of antiager will not affect the Mooney viscosity of mixing rubber. When the
total dosage of antiager RD/4020 and 4020 is 3 phr, crosslinking density and hardness obtained maximum
value; With the increase of the dosage of antiager RD/MB, the crosslinking density and hardness decreases
first and then increases; The springrate ratio decreases first and then increases with the increase of dosage
of antiager RD/4020; With antiager RD/MB, 4020 dosage increased, springrate ratio increases first and then
decreases. In order to study the relationship between hardness and springrate ratio of EPDM foaming material
activity, we selected the plasticizing system and protection system, explored the associated vulcanization
characteristics, Mooney viscosity, crosslinking density, foaming ratio and hardness, analyzed hardness and the
trend of springrate ratio.
Key words: EPDM foam material; vibration reduction; hardness; springrate ratio

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