Nonwoven fabric for pleated filters, and a production process therefor
AssigneeToray Industries, Inc.
InventorsHiroyoshi Horiguchi, Makoto Nishimura, Kaori Iwasaki
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Abstract
Nonwoven fabric for pleated filters comprising a sheath-core conjugate filament in which the core component is made of a polymer higher in melting point and the sheath component is made of a polymer lower in melting point, having compressively bonded portions dotted by embossing, with a weight per unit area X (g/m2) of the nonwoven fabric and a stiffness Y (mgf) obtained according to the Gurley method of JIS L 1096 of Y/X2≧0.03 and X≧120.
Claims11
A pleated nonwoven filter fabric for making into pleated filters comprising a plurality of sheath-core conjugate filaments in which the filament core component is made of a polymer higher in melting point than the sheath component and the sheath component is made of a polymer lower in melting point than the core component, wherein the surfaces of the nonwoven fabric have a plurality of compressively bonded dented portions at dotted locations, and the fabric weight per unit area X (g/m2) of the nonwoven fabric, measured according to the method of JIS L 1906, and the stiffness Y (mgf), measured according to the Gurley method of JIS L 1096, satisfy the following formulae:
- Y/X2≧0.03
- X≧120.
Dependencies are inferred from the claim text.