| abstract |
The invention discloses a preparation method of a filter felt, which comprises the following steps: s1, opening and mixing the short fibers; then preparing a fine felt through a mechanical net forming process; s2, laying a layer of fine felt on the upper surface and the lower surface of the base cloth, pre-needling, and main needling to obtain an intermediate filter felt; s3, taking the middle filter felt, performing dipping treatment, and then drying and shaping to obtain the filter felt; wherein the short fiber is aromatic polysulfonamide short fiber and furyl aromatic polyamide short fiber, and the base cloth is basalt fiber base cloth. The filter felt prepared by the invention has good high temperature resistance, corrosion resistance, high temperature dimensional stability and dust stripping performance. |