There are two common heating adhesive systems on the front, EVA (polyphylene vinyl acetate) and SBR (styrene butadiene rubber), which are often used for heating viscose layer.
What is the difference between the two adhesives? The sealing degree of EVA adhesive is lower than that of SBR, that is, for any lower belt, it has relatively low action temperature. On the contrary, SBR has high shear force and high viscoelastic capacity. For the same substrate, if SBR and EVA want to obtain the same viscosity (peel force), SBR needs higher temperature and higher shear capacity than EVA. As for which kind of SBR or EVA glue is better, it depends on the needs of users, and there is no absolute conclusion.

There are two common heating adhesive systems on the front, EVA (polyphylene vinyl acetate) and SBR (styrene butadiene rubber), which are often used for heating viscose layer. What is the difference between the two adhesives? The sealing degree of EVA adhesive is lower than that of SBR, that is, for any lower belt, it has relatively low action temperature. On the contrary, SBR has high shear force and high viscoelastic capacity. For the same substrate, if SBR and EVA want to obtain the same viscosity (peel force), SBR needs higher temperature and higher shear capacity than EVA. As for which kind of SBR or EVA glue is better, it depends on the needs of users, and there is no absolute conclusion.