| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter for securing sufficient adhesion, without making an adhesive compound remain in an object when removing a filter from the object.SOLUTION: A filter 1 comprises sheet-like nonwoven fabric 2 and an adhesive layer 3 of coating the adhesive compound on at least a part of one surface (a reverse surface) of the nonwoven fabric 2. The adhesive compound is a two-liquid mixed type polyurethane-based adhesive compound including a main agent and a curing agent, and the main agent includes polyurethane polyol having molecular weight of 15000 to 25000, and the curing agent is included by 2.5 to 4.5 pts.wt. to the main agent of 100 pts.wt., and the adhesive layer 3 projects by 20 to 40 μm (an H dimension) from a surface level S of the nonwoven fabric 2 before coating the adhesive compound. Thus, the adhesion of the filter 1 can be improved, and when removing the filter 1, the adhesive compound does not remain in the object. |
