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ABSORBENT STRUCTURES FROM AIRLAID DEFIBRATED WOOD PULP
ABSORBENT STRUCTURES FROM AIRLAID DEFIBRATED WOOD PULP
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机译:空气清净木浆的吸收性结构
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摘要
1500053 Hydrophillic wood pulp baths PROCTER & GAMBLE CO 2 May 1975 [7 March 1975] 18526/75 Heading D1R An absorbent air-laid structure comprises bleached hydrophilic defibrated wood pulp fibres having an average fibre length of at least 2 mm and an average fibre diameter of 0.02 to 0.06 mm, the structure having a density of 0.04 to 0.18 g/c.c. Preferably the fibres are 2 to 55 mm long. Soft woods (gymnosperms) e.g. spruce are steamed to plasticise the lignin and ground. The pulp is treated with dilute sulphuric acid to destroy micro-organisms and with diethylene triamine pentaacetic acid to remove metal ions and washed with de-ionised water. The pulp is rendered hydrophilic by bleaching with a hot aqueous hydrogen peroxide or sodium peroxide in the presence of sodium silicate and magnesium sulphate, or by bleaching with a hydrosulphite and its hydrophilic character further increased by slurrying with acetone/ methanol to extract hydrophobic lipids. The hydrophilic pulp is comminuted and air laid and the web compressed in a hydraulic die or by rolling. The density of the web is measured under load of 5 g/cmSP2/SP. The web may include delignified wood pulp, rayon, cotton, cellulose acetate, wool and asbestos fibres.
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机译:1500053亲水性木浆浴PROCTER&GAMBLE CO 1975年5月2日[1975年3月7日] 18526/75标题D1R吸收性气流成网结构,包括漂白的亲水性去纤维木浆纤维,其平均纤维长度至少为2 mm,平均纤维直径0.02-0.06mm,密度为0.04-0.18g / cc的结构优选地,纤维长度为2至55mm。软木(裸子植物)例如蒸云杉以塑化木质素并磨碎。用稀硫酸处理纸浆以破坏微生物,并用二亚乙基三胺五乙酸处理纸浆以除去金属离子,并用去离子水洗涤。通过在硅酸钠和硫酸镁的存在下用热的过氧化氢水溶液或过氧化钠漂白或通过用亚硫酸氢盐漂白使纸浆具有亲水性,并且通过用丙酮/甲醇制浆以提取疏水性脂质进一步提高了其亲水性。将亲水性纸浆粉碎并进行气流成网,然后将幅材在液压模具中或通过辊压进行压缩。在5 g / cm 2 SP>的负载下测量纤维网的密度。该纤维网可以包括脱木质的木浆,人造丝,棉,乙酸纤维素,羊毛和石棉纤维。
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