Leakage-proof strip-shaped material for sewing needle hole of filter bag as well as preparation method and application of leakage-proof strip-shaped material

The invention discloses a filter bag sewing needle hole leakage-proof strip-shaped material and a preparation method and application thereof, and belongs to the technical field of non-woven fabrics. The composite membrane sequentially comprises a non-woven fabric layer and a PTFE membrane layer which are overlapped from bottom to top, the non-woven fabric layer is composed of PPS fibers or polyester fibers, and the gram weight of the non-woven fabric layer is 110-150 g/m < 2 >; the air permeability of the PTFE film layer ranges from 50 L/m < 2 >. S.127 pa to 120 L/m < 2 >. S.127 pa. The preparation method comprises the following steps: (1) preparing non-woven fabric base cloth; (2) singeing and calendaring; (3) laminating; and (4) slitting. The application of the filter bag sewing needle hole leakage-proof strip-shaped material in the filter bag sewing needle hole leakage-proof field comprises the following steps that the filter bag sewing needle hole leakage-proof strip-shaped material is stacked over a filt