Abstract: Provided is a spunbond nonwoven fabric for use in filters which has excellent rigidity, folding endurance, and uniformity of a weight per unit area, and which also has excellent dust collection performance and mechanical properties. The spunbond nonwoven fabric for use in filters includes a thermoplastic continuous filament and has a partially fused portion. The nonwoven fabric has a stiffness of 2 mN or more and 100 mN or less, a weight per unit area-CV value of 5% or less, and a weight per unit area of 150 g/m2 or more and 300 g/m2 or less.

Abstract: A nonwoven fabric for curtain in an embodiment of the present invention is formed from fibers having a thermoplastic resin as a main component, said nonwoven fabric for curtain being characterized in that: in the surface of the nonwoven fabric, the fibers are fused together at points where the fibers intersect, and the fibers are mutually isolated at locations other than the intersecting points; and furthermore, the KES surface roughness SMD of at least one side of the sheet is 1.2 ?m or less, and the longitudinal tearing strength per fabric weight is 0.50 or more.

Abstract: A spunbond non-woven fabric includes a thermoplastic continuous filament. A CV value of air permeability of the non-woven fabric is 15% or less, bending resistance in a machine direction of the non-woven fabric is 40 mN or more and 80 mN or less, the non-woven fabric includes a projected part and a recessed part, and in a non-woven fabric cross-section, a thickness from one surface to another surface of the projected part is determined to be tA, a thickness from one surface to another surface of the recessed part is determined to be tB, and respective distances from one surface of the projected part to one surface of the recessed part are determined to be tC and tD (tC<tD), and the non-woven fabric has a relation represented by formulas (1) and (2) below: 0.5?1?tB/tA<1.0??(1) 0.65<tC/tD<1.0??(2).

Abstract: Provided is a spunbound nonwoven fabric for use in filters which has excellent rigidty, folding endurance, and uniformity of a weight a unit area, and which also has dust collection perforance and mechanical properties. The spunbond nonwoven fabric for use in filters includes a thermoplastic continuous filament and has a partially fused portion. The nonwoven fabric has a stiffness of 2 mN or more and 100 mN or less, a weight per unit area-CV value 5% or less, and a weight per unit area of 150 g/m2 more and 300 g/m2 or less.

Abstract: A nonwoven fabric for curtain in an embodiment of the present invention is formed from fibers having a thermoplastic resin as a main component, said nonwoven fabric for curtain being characterized in that: in the surface of the nonwoven fabric, the fibers are fused together at points where the fibers intersect, and the fibers are mutually isolated at locations other than the intersecting points; and furthermore, the KES surface roughness SMD of at least one side of the sheet is 1.2 ?m or less, and the longitudinal tearing strength per fabric weight is 0.50 or more.

Abstract: The spunbond non-woven fabric for a filter includes a composite polyester fiber containing a low melting point polyester arranged in the vicinity of a high melting point polyester, the low melting point polyester having a melting point 10 to 140° C. lower than the melting point of the high melting point polyester, the spunbond non-woven fabric having a surface layer and a back layer, the composite polyester fiber having a single fiber fineness of not less than 1 dtex and less than 3 dtex at the surface layer and said composite polyester fiber having a single fiber fineness of not less than 3 dtex and not more than 5 dtex at the back layer, and the spunbond non-woven fabric having a basis weight of 130 to 300 g/m2. A spunbond non-woven fabric for a filter having high rigidity and air permeability as well as excellent dust brush-off performance is provided.

Abstract: A spunbond non-woven fabric for a filter has high rigidity and air permeability as well as excellent dust brush-off performance. The spunbond non-woven fabric for a filter includes a composite polyester fiber containing a low melting point polyester arranged in the vicinity of a high melting point polyester, the low melting point polyester having a melting point 10 to 140° C. lower than the melting point of the high melting point polyester, the composite polyester fiber having a single fiber fineness of not less than 1.5 dtex and less than 5.0 dtex, the spunbond non-woven fabric having a basis weight of 150 to 300 g/m2, an apparent density of 0.25 to 0.40 g/cm3, an air permeability per basis weight of 0.05 to 0.45 (cm3/cm2·sec)/(g/m2), and a bending resistance per basis weight, in at least one of the machine direction (MD) and the transverse direction (TD), of 0.09 to 0.32 (mN)/(g/m2).