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Rubbers have the same or different layers, which must be firmly bonded together during the tire production process. It is very important that many components of composite rubber can be automatically bonded before curing, such as tire belts, rubber hoses, etc. In the production of tires, before vulcanization, the internal cord, tire tread and side parts should be well bonded, natural rubber has a good viscosity, but like SBR (butadiene), NBR (nitrile), IIR, RPM, EPDM (EPDM) these different synthetic rubber, they have lower adhesion, They are sometimes used alone or in combination with natural rubber. Tackifying resin is usually added to achieve better results. The tackifying resin has a good tackifying effect when adding 3-5 (percent), it can be better compatible and dispersed during rolling process, and can have a plasticizing effect, and will not lose viscosity in long-term storage, and does not affect the vulcanization performance.