A method for producing an air-permeable adhesive tape comprising a substrate and a porous adhesive layer formed on said substrate is provided. The method comprises the steps of: forming a layer of a solution on a substrate, said solution containing an adhesive material in an organic solvent; applying water drops on said layer of said solution while said organic solvent remains in said layer, thereby allowing water drops to sink into said layer, the diameter of said water drops being in the range of 10 to 1000 µm, and the total amount of said water drops applied onto the surface of said layer being 5 to 200 g/m²; evaporating said organic solvent contained in said layer of the solution, thereby forming an adhesive layer that contains said water drops; and evaporating said water from said adhesive layer, thereby forming communicating pores extending from the external surface to the inner surface of said adhesive layer.
本发明提供了一种生产透气胶带的方法,该胶带由基材和在基材上形成的多孔粘合剂层组成。该方法包括以下步骤在基底上形成一层溶液,所述溶液包含有机溶剂中的粘合材料;在所述溶液层上滴
水,同时所述有机溶剂仍留在所述溶液层中,从而使
水滴沉入所述溶液层,所述
水滴的直径范围为 10 至 1000 微米,滴在所述溶液层表面的所述
水滴的总量为 5 至 200 克/平方米;蒸发所述溶液层中所含的有机溶剂,从而形成包含所述
水滴的粘合剂层;以及 从所述粘合剂层中蒸发所述
水分,从而形成从所述粘合剂层的外表面延伸至内表面的沟通孔。