Spunbond nonwoven fabric for use in filters, and manufacturing method thereof
AssigneeToray Industries, Inc.
InventorsShinobu Mizogami, Hiroyuki Matsuura, Ryoichi Hane
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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.
Claims14
A spunbond nonwoven fabric for use in filters, comprising a thermoplastic continuous filament and having a partially fused portion, wherein the nonwoven fabric has a stiffness of 2 mN or more and 100 mN or less, a weight per unit area-CV value of 1% or more and 5% or less, and a weight per unit area of 150 g/m2 or more and 300 g/m2 or less;
- wherein the thermoplastic continuous filament is a composite type filament in a form of core-sheath, in which a polyester low melting point polymer having a melting point lower than that of a polyester high melting point polymer by 10° C. or higher and 140° C. or lower is arranged as a sheath around the polyester high melting point polymer as a core;
- wherein the polyester high melting point polymer/polyester low melting point polymer include combinations of PET/PBT, PET/PTT, PET/polylactic acid, or PET/copolymerized PET;
- and
- wherein the spunbound nonwoven fabric has folding endurance of 100,000 times or more, as measured according to JIS P8115:2001 “Paper and board—Determination of folding endurance—MIT method”.
Dependencies are inferred from the claim text.