Rubber molding:

    Gum molecular structure of unsaturated long bond elastic body, forming elements, the need for appropriate pharmaceutical additive and external environmental factors (such as time, temperature, pressure, etc.), which is an unsaturated bond damage, re combination of unsaturated bonds, and vacuum-assisted, fully air containing extract. Thus, in order to make molded rubber, play its rightful properties. If there are any missing its molding process (such as recipes error, lack of time, temperature and improper), can cause loss of physical properties, the excess release of drugs, deformation, accelerated aging, a variety of serious adverse phenomenon.

    Rubber materials preparation:

    Formulated rubber materials can be divided into three basic processes:

    1. mastication: plastic practice is to cut raw rubber and raw rubber plasticized, homogenized, with the help of agents kneading operations. The effect is to improve the dispersion of the drug to prevent the friction heat operations may cause rubber scorch phenomenon occurs, thereby changing the workability of the rubber.

    2. Kneading: kneading the blending agent is uniformly mixed with raw rubber mastication completed, the kneading and the merits of a direct impact on whether the product good. Drug dispersion uneven molecular structure can not be completely crosslinked rubber can not achieve the desired physical properties.

    3. extrusion: the completion of kneading raw rubber, after extrusion operation, the rubber compound containing excess air is pushed out and complete the required thickness, in order to facilitate the molding operation within the mold.