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process for the production of paper of high wet and trockenfestigkeit

机译:高湿纸和纸浆纸的生产方法

摘要

Paper is made from an aqueous suspension of paper pulp to which are added (1) a cationic water-soluble or water-dispersible organic polymer and (2) a water-solubilized polymer or copolymer of an alpha, beta-ethylenically unsaturated aldehyde. This polymer has an intrinsic viscosity of at least 0.3 dl/g and is formed by addition polymerization at the ethylenic group of the aldehyde. It may be a polymer of aerolein, methacrolein or their substitution derivatives, or a copolymer of such a monomer with another ethylenic monomer. It may be solubilized by reaction with sulphur dioxide, alkali metal bisulphite, ammonium sulphite or bisulphite or sodium hydroxide. A soluble copolymer of acrolein and sodium styrene-sulphonate can also be used. The cationic polymer may be a cationic starch, e.g. the reaction product of starch and an epoxy-compound containing a quaternary ammonium group or the corresponding chlorohydrix, a polymer or copolymer of such an epoxy compound, an addition polymer of an ethylenically unsaturated monomer possessing a quaternary ammonium group, e.g. a polymer of an alkyl-ammonium salt or of: FORM:1036848/D1-D2/1 where X is a water-soluble anion, or a condensation polymer, e.g. a polyester, polyamide or polyacrethane containing quaternary ammonium groups. The Specification includes lists of such materials. The pulp may also contain emulsifying agents, water-dispersible binding colloids, plasicizers, antioxidants, dyes, filters or alum. The product has good wet and dry strengths, dimensioned stability and fold endurance and may be used for facial tissue, hand towels, maps, filing cards, construction or wrapping paper containers.
机译:纸由纸浆的水悬浮液制成,其中向其中添加(1)阳离子水溶性或水分散性有机聚合物,和(2)α-β-烯键式不饱和醛的水溶聚合物或共聚物。该聚合物具有至少0.3dl / g的特性粘度,并且通过在醛的烯基上的加成聚合反应而形成。它可以是丁香油精,异丁烯醛或其取代衍生物的聚合物,或此类单体与另一种烯键式单体的共聚物。它可以通过与二氧化硫,碱金属亚硫酸氢盐,亚硫酸铵或亚硫酸氢盐或氢氧化钠反应来溶解。也可以使用丙烯醛和苯乙烯磺酸钠的可溶性共聚物。阳离子聚合物可以是阳离子淀粉,例如丙烯酸。淀粉与含有季铵基团或相应的氯羟基的环氧化合物的反应产物,这种环氧化合物的聚合物或共聚物,具有季铵基团的烯键式不饱和单体的加成聚合物,例如烷基铵盐或以下聚合物的形式:<FORM:1036848 / D1-D2 / 1>其中X是水溶性阴离子,或缩合聚合物,例如。含有季铵基团的聚酯,聚酰胺或聚丙烯酰胺。该规范包括此类材料的清单。纸浆还可以包含乳化剂,水分散性粘合胶体,增塑剂,抗氧化剂,染料,过滤器或明矾。该产品具有良好的干湿强度,尺寸稳定性和耐折性,可用于面巾纸,手巾,地图,档案卡,建筑或包装纸容器。

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