Spun bonded nonwoven fabric, filter laminated filter material, filter material for dust collector pleated filter, dust collector pleated filter and medium jet pulse jet type dust collector

摘要

The spun bond nonwoven fabric of the present invention isIt consists of a thermoplastic continuous filament consisting of a high melting point component and a low melting point component.Partially fused,Convex portions of the non fusion.A fused recess is provided.The rigidity in the MD direction is 20 MN or more and 40 Mn or lessIn the nonwoven sectionThe thickness TA from the surface of the convex to the other surfaceThe thickness TB from the surface of the recess to the other surface isThe distance from one surface of the convex to one surface of the recess isTD (TC < TD)The following equation (1)(2)0.5 ≦ 1 TB / Ta < 1.00.35 < tt / TD < 0.65