| 摘要 |
This three-layer laminate sheet provided with porous fiber layers consisting of a core material of a nonwoven fabric composed mainly of thermoplastic fibers, and a layer above and a layer below the core material composed mainly of fine diameter cellulose fibers, wherein the air resistance of the three-layer laminate sheet, as measured by the Gurley method, is 1000 seconds/100 mL or less, the mass per unit area of the three-layer laminate sheet is in the range of 2 g/m2 to 15 g/m2, and the thickness of the three-layer laminate sheet is in the range of 5 mum to 40 mum. If the upper porous fiber layer is specified as (P), the lower porous fiber layer is specified as (Q), the nonwoven fabric is specified as (S), and the three-layer laminate sheet composed of P, Q and S is specified as (P/S/Q), a method for manufacturing the three-layer laminate sheet involves overlapping (P) and (Q) with (S), which has been prepared in advance, so as to attain (P/S/Q), and then integrating (P/S/Q) by applying pressure while in an overlapping state. |
