| 摘要 |
PROBLEM TO BE SOLVED: To provide a flame retardant non-halogenated and non-phosphorylated non-woven fabric suitably used as a filter material. SOLUTION: This flame retardant non-woven fabric is attached with a flame retardance including a mixture of 20 to 80 wt.% ammonium sulfate and 80 to 20 wt.% guanidine sulfamate on the non-woven fabric. The flame retardant non-woven fabric has 30 to 150 pts.wt. of amount of the flame retardant attached. Or, the flame retardant non-woven fabric substantially covers or impregnates the non-woven fabric by an after-processing treatment. The flame retardant non-woven fabric further includes a flame-retarding assistant. COPYRIGHT: (C)2008,JPO&INPIT
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