Addition of small proportions of polyamide amine to MF resins for the purpose of resin impregnation yields a considerable improvement in both paper toughness and tensile fracture strength. The fracture strain of impregnated paper with modified resin was enhanced by more than 100% (1.08%) as compared to comparable impregnation with neat MF resin (0.49%) without sacrificing the tensile strength.

中文翻译：

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通过添加聚酰胺胺（PA）来增强MF树脂的延展性能的新途径

为了树脂浸渍的目的，向MF树脂中添加少量聚酰胺胺可显着改善纸张韧性和拉伸断裂强度。与不添加拉伸强度的纯MF树脂（0.49％）相比，改性树脂浸渍纸的断裂应变提高了100％（1.08％）以上。