| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a coating-booth filter capable of simplifying a manufacturing step, preventing increase of pressure loss by a film-formation phenomenon of a molten resin, and preventing a waving of a filtering media by a thermal contraction ratio between fiber layers and formation of a wrinkle of a heat-bonding fiber sheet. <P>SOLUTION: The coating-booth filter 40 consists of a laminate of a short fiber layer 1 and a heat bonding fiber sheet 2 with a part of the respective fibers melted and thermally bonded. The short fiber layer 1 contains a mixed fiber of a high melting point fiber and the heat bonding fiber, and the heat-bonding fiber sheet 2 is a composite short fiber. Prior to thermal adhesion, a tension is given to the one having a small thermal contraction ratio of the short fiber layer 1 and the thermal bonding fiber sheet 2 to a degree of canceling a difference of the thermal contraction ratio. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
