When using nitrile rubber or nitrile reclaimed rubber to prepare some hoses, tapes, seals, and shock-absorbing products, metal framework materials are required to improve the mechanical strength and shape stability of nitrile products and prolong the service life of the finished product. In actual production, the adhesion between the nitrile rubber/reclaimed rubber and the metal framework material has a great influence on the comprehensive physical properties of this type of nitrile rubber products. Rubber product manufacturers need to take appropriate measures to further improve the nitrile rubber/reclaimed rubber. Adhesion to metal materials.
When using nitrile rubber or nitrile reclaimed rubber to prepare rubber products containing metal materials, the type and amount of reinforcing agent in the rubber formula, the type and amount of plasticizer, surface roughness, rubber hardness, bonding method and coupling Factors such as chemicals will affect the adhesion between nitrile rubber/reclaimed rubber and metal materials.
1. Reinforcing agent use skills
In the production of nitrile rubber products containing metal skeletons, the amount of reinforcing agent is second only to rubber raw materials, which has a greater impact on the adhesion between rubber and metal materials. In actual production, carbon black and silica are the most commonly used 2YLYY38 reinforcing agents. In theory, carbon black with small particle size is easier to be embedded in the voids on the surface of the solid material to be adhered than white carbon black. The wettability between the adhesive and the adherend is good, the shear strength is high, and the adhesion between metal materials and rubber Bigger.
When carbon black is used to reinforce nitrile rubber or nitrile reclaimed rubber, the more the amount of carbon black, the greater the shear strength of the adhesive and the further increase in system adhesion. Therefore, an appropriate increase in the amount of small particle size carbon black can improve the adhesion between the nitrile compound and the metal material.
2. Tips for using plasticizers
In the production of nitrile rubber products, plasticizers can reduce the force between rubber molecular chains, improve rubber processing technology, and improve the physical and mechanical properties of the rubber. Commonly used plasticizers for nitrile rubber/reclaimed rubber are coumarone resin and DOP. In actual production, the adhesion performance between DOP-based nitrile rubber and metal materials is better than that of coumarone resin. Properly increasing the amount of DOP under the premise that other physical properties allow it can further improve the adhesion between rubber and metal.
When nitrile rubber or nitrile reclaimed rubber is used to produce rubber products containing metal skeletons, choosing appropriate types of reinforcing agents and plasticizers, and reasonable control of the amount of compounding agents can significantly improve the bonding performance between nitrile and metal materials. . In actual production, what other measures can rubber product manufacturers take to improve the adhesion between nitrile rubber and the metal skeleton, I will continue to discuss with you later.
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