涂胶+PE缠绕挤出机：胶粘剂缠绕：由于聚乙烯层与熔结环氧涂层粘接力较差，利用胶粘剂提高熔结环氧涂层与聚乙烯层两种不同极性材料粘接力，胶粘剂的涂敷必须在环氧粉末胶化过程中进行。
Gluing + PE winding extruder: adhesive winding: due to the poor adhesion between polyethylene layer and fusion bonded epoxy coating, the adhesive is used to improve the adhesion between fusion bonded epoxy coating and polyethylene layer, and the application of adhesive must be carried out in the process of epoxy powder gluing.