| 摘要 |
<p>A non-woven material containing from 2% to 25% by dry weight of an alkali-soluble, water-resistant in neutral to weakly acidic solutions, binder for non-woven materials based on an aqueous vinyl acetate copolymer containing protective colloids and optionally emulsifiers and having the following monomer units (1) 50% to 70% of vinyl acetate (2) 20% to 35% of vinyl esters of higher alkanoic acids and/or higher alkyl esters of acrylic or methacrylic acids, and (3) 3% to 15% of ethylenically-unsaturated acids, said binder being applied to said non-woven material as an aqueous dispersion and subsequently dried.</p> |
