| 摘要 |
Nonwoven fabrics are impregnated first with a conventional binder and then with a polyvinyl chloride-antimony trioxide binder. After the second impregnation the fabric is longitudinally stretched while it is being dried, rewetted with water, and then transversely stretched while it is being dried. Further there is disclosed a novel impregnant composition which is useful in fireproofing nonwoven fabrics.
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