EVA: it is a solid soluble polymer without solvent and water content. It becomes a kind of colloid with certain fluidity after heating to a certain temperature. 

PUR: it is a moisture reactive hot melt adhesive. It will react with the moisture in the air after the heating operation. After the reaction, it will not be reversible (i.e. heating will not melt), so pur glue is relatively resistant to high temperature. Compared with EVA adhesive, it has obvious improvement of peel strength, which can meet the environmental protection requirements.