Reinforcing resin, which significantly improves the hardness of the rubber.
Properties: SY-6700 is a phenol-formaldehyde resin modified by tallow oil; SY-6701 is a phenol-formaldehyde resin modified by cashew nut oil.
Performance: Can significantly improve the hardness, wear resistance, tear resistance, tensile strength and elongation stress of the rubber compound. SY-6700 has a long scorching time and is safe to process; SY-6701 has high modulus and high hardness.
Application: Mostly be used in radial tires to improve the strength and hardness of vulcanized rubber and reduce heat generation.
Use Scenarios
Rubber-based adhesive formulations in tire production require improved tear strength and abrasion resistance
Reinforcing Resin SY‑6700 and SY‑6701 from HEWITT CHEMICAL are suitable for use in rubber adhesive glue formulations where mechanical performance and durability are prioritized. In tire manufacturing, these resins can be incorporated into rubber compounds to enhance tear strength, abrasion resistance, tensile strength, and hardness. SY‑6700 is modified with beef tallow oil and provides a longer scorch time, supporting stable processing during high-temperature vulcanization. SY‑6701, modified with cardanol, offers higher hardness and modulus, contributing to increased dimensional stability of rubber parts. These properties make both resins applicable in rubber based adhesive systems targeting structural integrity in dynamic environments.
Composite rubber structures benefit from enhanced bonding strength and flexibility under mechanical stress
In rubber composites involving multi-layered structures—such as rubber-to-metal or rubber-to-fabric bonding—mechanical reinforcement is essential for maintaining joint integrity. HEWITT CHEMICAL’s SY‑6700 and SY‑6701 resins can be introduced into adhesive formulations to support consistent strength and elasticity. The use of SY‑6700 provides balanced scorch safety with performance, while SY‑6701 contributes to increased modulus and tensile reinforcement. These characteristics make them valuable in systems offered by a rubber adhesive manufacturer, where the need for bonding efficiency aligns with long-term mechanical durability in complex applications.
Industrial rubber parts under dynamic load conditions require improved modulus and wear resistance
Rubber products used in equipment such as conveyor belts, rim linings, and protective covers are exposed to wear, heat, and deformation under prolonged use. Adhesive systems incorporating SY‑6700 or SY‑6701 can help maintain compound stability in these demanding conditions. The resins raise compound hardness and modulus, thereby reducing surface wear and deformation fatigue. This makes them suitable for use in rubber based adhesive systems where extended service life and resistance to mechanical fatigue are required. In such applications, selecting the best adhesive for rubber involves considering compound compatibility, performance under load, and heat stability.
