Introduction to rubber parts manufacturers rubber aging
The preparation of rubber raw materials can be divided into three basic processes:
1. Plasticizing: plasticizing is to cut the raw rubber, plasticize and homogenize the raw rubber, and help the mixing operation of the mixture. The effect is to improve the dispersion of drugs, prevent friction heat in operation, and cause scorching of rubber, so as to change the processability of rubber.
2. Mixing: mixing is to evenly mix the matched drugs into the raw rubber after plastic mixing, and the quality of mixing directly affects the quality of the product. The drug dispersion is uneven, the molecular structure can not be completely crosslinked, and the rubber can not achieve the ideal physical properties.
3. Press out: for the raw rubber after mixing, press out the excess air contained in the rubber and complete the required thickness to facilitate the molding operation in the mold.
The molecular structure of raw rubber is an elastomer with unsaturated long bond. Therefore, in the forming elements, appropriate drug additives and external environmental factors (such as time, temperature, pressure, etc.) are required to destroy its unsaturated bond, re combine it into saturated bond, and completely force out the contained air with the aid of vacuum. Only in this way can the formed rubber give full play to its due characteristics. If there is any defect in the forming process (such as wrong formula, insufficient time, improper temperature, etc.), it can cause the loss of physical properties, the release of excess drugs, deformation, accelerated aging, and various serious adverse phenomena.
The rubber parts manufacturer will introduce the aging phenomenon of rubber to you:
According to the environmental conditions in which the finished rubber products are located, the phenomena such as cracking or hardening and rubber physical property degradation over time are called aging phenomenon. The causes of aging include external and internal factors:
1. External factors: external factors include oxygen, oxide, ozone, heat, light, radiation, mechanical fatigue, lack of processing process, etc.
2. Internal factors: internal factors include the type of rubber, forming method, bonding degree, type of cooperating drugs, factors in processing engineering, etc.
The prevention of aging phenomenon focuses on the correct rubber type selection and formula design, plus rigorous production concept. Only in this way can the service life of rubber products be increased and their special functions be brought into play.