| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive nonwoven fabric that is resistant to breakage caused by pulling because the fabric undergoes no embrittlement by exposure to heat from the production process and can retain the strength even when the unit weight of the fabric is low and is not restricted to the fiber length, different from the wet process. SOLUTION: The backing fiber comprising carbon fiber as inorganic fiber 5, polypropylene fiber as water-insoluble thermoplastic organic fiber 6 and polyvinyl alcohol fiber as water-soluble organic fiber 7 are mixed and the resultant fiber assembly is needle punched whereby a fabric sheet is formed. Then, the water-soluble organic fiber 7 is softened or fused and solidified by drying whereby the contact points between the fibers in the fiber assembly are connected. COPYRIGHT: (C)2005,JPO&NCIPI
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