Factors Affecting The Adhesion Of Polyurethane Wheel Rubber

The structural design of the rubber strips we commonly use is the same as that of industrial rollers, both of which are made by bonding the outer layer product and the inner layer material together. Therefore, in the processing and production process of polyurethane wheels, the bonding between the outer rubber and the iron wheel has a significant impact on the quality of the finished product, and we cannot ignore the factors that may affect its bonding quality. Next, Yalide will talk about the factors that affect the adhesion of polyurethane wheel rubber.
1. The structure of molecular chains: There is a positive correlation between the polarity similarity and compatibility of bonded rubber molecules. The more similar the polarity and the better the compatibility, the higher the adhesive strength.
2. Molecular weight size: Both high and low molecular weight values can affect the bonding effect. Only by selecting an appropriate molecular weight can the rubber adhesion of polyurethane wheels meet the standard.
3. Composition of rubber material: The use of appropriate post effect accelerators or thickeners can promote deep diffusion of molecules, thereby increasing the viscosity of the rubber material, such as resin, rosin, pine tar, etc. Excessive or insufficient dosage can affect the bonding strength.
4. Surface state of adhesive: The oxide film, frost spray phenomenon, and release agent formed by the oxidation of the adhesive surface will reduce its adhesive strength. Therefore, before bonding, appropriate methods should be used to treat the surface of the adhesive, such as solvent wiping, mechanical roughening, etc.
5. The speed of solvent evaporation: When we use solvent based adhesives for bonding, it is easy for residual solvents to produce pores, which can affect the bonding strength. Both too fast and too slow speed are not conducive to smooth bonding. Therefore, when choosing a mixed solvent that combines speed and slowness, the effect will be better. Low concentration solvents can also be applied multiple times to iron wheels, and the effect is also good.
In addition to the five factors mentioned above that can affect the bonding quality of polyurethane wheel rubber, the bonding time, temperature, and external pressure can also affect its bonding strength to a certain extent. Adhesive work plays an important role in the production and processing of products, and we need to prepare well before processing, fully consider the factors that affect adhesion, in order to avoid compromising the effectiveness of later use.