The proper use of several adhesive systems that rubber manufacturers must know can significantly red
When using reclaimed rubber to produce rubber products, many rubber compounds need to contact the rubber with the surface of homogeneous or heterogeneous materials, and it is necessary to use an appropriate amount of binders and bonding aids to form a bonding system, such as the common m-methyl-white system. . When using reclaimed rubber to produce tires, conveyor belts, hoses, and rubber-metal composite materials, the materials to be adhered are different, and different types of adhesives and adhesives need to be matched.
1. Common adhesive systems and adhesive materials
Commonly used rubber adhesives are adhesives, direct adhesives, impregnating adhesives and bonding aids. Adhesives can be used in the production of natural rubber, styrene-butadiene rubber, styrene-butadiene rubber, butyl rubber, neoprene and other products, and are mainly used for bonding between rubber, fabric, metal, wood, and concrete. The common meta-a-white system is a direct adhesive, which can be used for bonding between rubber-fabric, rubber-brass, and rubber-zinc. Impregnation adhesives are commonly RFL systems, with rubber-fabric bonding.
In actual production, the adhesion system also needs to use adhesion promoters for rubber-brass, rubber-zinc, rubber-fabric adhesion, common metal compound salt-23, cobalt stearate RC-S95 , boron acylate cobalt RC-B23 and so on.
2.HRH direct bonding system
The HRH adhesive system is the meta-methyl-white adhesive system. In the dry adhesive bonding technology of rubber and fiber, fabric, brass-plated or galvanized steel wire and other skeleton materials, resorcinol or its derivatives are used as meta- Hydroquinone donor, hexamethylenetetramine (HMT) or hexamethoxymethylmelamine (binder A) as methylene donor, silica as adhesion promoter, directly added to the compound ; Resorcinol and methylene compounds can react at vulcanization temperature to generate resorcinol resin with strong adhesive activity. In actual production, m-methyl-white adhesive system is used in the manufacture of rubber tires, conveyor belts , The main types of adhesives for flat belts and hoses. It should be noted that the direct bonding method is not effective on unimpregnated polyester fabrics.
3. RFL Dip Bonding System
The RFL impregnation method can be used for the bonding between nylon polyester, rayon, glass fiber and rubber, and the bonding strength is basically the same as that of the direct bonding method. Since rubber and fiber are very different in modulus, molecular polarity and chemical activity HYL25Y10Y2YYC, it is required that the three components of the RFL impregnation solution match the properties of the adhesive between the modulus, molecular Polarity and chemical activity, usually using activated reactive resins. In RF dips, RF resin is a direct adhesive and L (latex) provides flexibility.
The interface between the rubber and the fabric should be as soft as possible, with good heat resistance and fatigue resistance, able to form a three-dimensional network structure, not flowing and tough under high temperature and high pressure. The RF (resorcinol-formaldehyde) resin component is fluid during drying and has high toughness after drying. In the process of dipping and drying, resorcinol and formaldehyde are condensed to form resorcinol containing methylol, and then the methyl group is automatically oxidized to form a soluble RF resin containing methylene and methylol, which is tough and sustainable. Reactive 3D mesh RF resin.
Reclaimed rubber is the third largest product in rubber, and the commonly used adhesive systems and compounding agents are basically the same as those of natural rubber and synthetic rubber products. In actual production, more rubber product manufacturers use natural rubber, synthetic rubber and suitable varieties of reclaimed rubber to effectively reduce the cost of raw materials on the premise of ensuring the quality of rubber products. Later, the editor will share with you the specific coordination skills of the adhesive system of reclaimed rubber products.