EPDM rubber products processing technology

(1) mixing weigh the components, the order of EPDM rubber, low-density polyethylene, inorganic rigid particles into the mixer, pre-mixed at room temperature for 2-3 minutes, and then the organic priming
The hair raising agent is slowly added to the premix within two minutes, and mixed at room temperature for 6-8 minutes. The quality of dispersion and distribution of all components in the rubber material has an important influence on the quality of the final product, especially the smoothness of the surface of the profile.

(2) Extrusion will be mixed materials into the same direction of rotation parallel twin-screw extruder pelletising. It is necessary to control the set temperature.

(3) Vulcanisation Vulcanisation and the foaming reaction that occurs at the same time have the most important influence on the quality of the final seal.

The temperature at which the vulcanisation starts and the temperature at which the foaming agent starts to react and the accelerator system all have an important effect on the performance of the finished product. The product performance is better when the amount of accelerator is lower. The process temperature must be kept constant to avoid fluctuations in the quality of the finished product. Rheological parameters measured at temperatures comparable to those of the process were used to predict product properties, and meaningful results were obtained. A mathematical model describing the correlation between the rheological properties and the product properties was developed, making it possible to predict the properties of the finished product. The toughness of the composites was significantly improved and the rigidity and toughness were balanced, and the preparation method was simple, the production cost was low, and the applications were wide.