| 摘要 |
<p>B 30595 Paper An amino-aldehyde, eg urea-formaldehyde, resin is converted into fibres and used to form at least 1% by weight of the fibrous component of paper. The resin fibres, which are free of bound inorganic oxyacid radicals and carbohydrate, have a degree of cure of between 50 and 90%. The use of such partially cured resin fibres gives an improvement in the strength of the paper.</p> |
