Rubber material quality issue: There may be poor quality raw materials or impurities mixed in the rubber material, which can affect the dispersion performance of the rubber material.

Improper mixing process parameters: Improper setting of temperature, time, shear force and other parameters in the mixing process may lead to poor dispersion of the rubber material. For example, excessive temperature or short mixing time may lead to insufficient dispersion of the rubber material.
Mixing equipment issue: The performance and state of the mixing equipment can also affect the dispersion performance of the rubber material. Equipment wear, scaling or carbon accumulation on the inner wall of the mixing cylinder, and other issues can all lead to poor dispersion of the rubber material.

Improper use of additives: The selection and use method of additives are crucial for the dispersion performance of the adhesive. If the selection of additives is improper or the amount added is not accurate, it may lead to poor dispersion of the adhesive.

Improper mixing operation: The technical level and experience of mixing operation can also affect the dispersion performance of the rubber material. Factors such as the operator's mastery of the mixing process and equipment, as well as operational standardization, may lead to poor dispersion.
Environmental factors: Environmental conditions such as humidity and temperature may also have an impact on the dispersion performance of the adhesive. Environmental factors such as high or low humidity and temperature fluctuations can lead to poor dispersion of the adhesive.

In summary, the causes of poor dispersion of mixed rubber may be a combination of factors such as rubber material quality issues, improper mixing process parameters, mixing equipment issues, improper use of additives, improper mixing operations, and environmental factors.