PROBLEM TO BE SOLVED: To provide a thermally adhesive filter in which fungus shielding properties, air permeability and moisture permeability can be made consistent, also, thermal adhesion can be performed to the other member with strong adhesive power, further, the control of production conditions is easy, and production cost is low.SOLUTION: Provided is a thermally adhesive filter comprising an air permeable paper base material and a thermally adhesive particle layer(s) provided on at least either side of the paper base material, the thermally adhesive particle layer(s) includes the following thermally adhesive particles (I), and the ratio of the thermally adhesive particles (I) occupied in the dry solid content of the thermally adhesive particle layer(s) is 50 mass% or more. The thermally adhesive particle(s)(I): ethylene-vinyl acetate copolymer as a main component, the particles in which the particle diameter lies in the range of 1 to 30 μm.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】遮菌性と透気性、透湿性を両立でき、かつ強い接着力で他の部材に熱圧着でき、しかも製造条件の調整が容易で、製造コストが低い熱接着性フィルタを提供する。【解決手段】透気性の紙基材と、前記紙基材の少なくとも一方の面に設けられた熱接着粒子層とを備え、前記熱接着粒子層は、下記熱接着性粒子(I)を含み、前記熱接着粒子層の乾燥固形分に占める前記熱接着性粒子(I)の割合が50質量%以上であることを特徴とする熱接着性フィルタ。熱接着性粒子(I):エチレン酢酸ビニル共重合体を主成分とし、粒子径が1~30μmの範囲にある粒子。【選択図】なし
