硅酮工艺 - dow corning.pdfVIP

化学药品 Chemicals 硅酮正越来越多地用于粗浆洗涤 硅酮工艺 Silicones are increasingly used in brownstock washing 粗浆洗涤操作受益于硅酮工艺 撰文：詹姆斯·哈勃默勒 Silicone processing Silicone processing benefits pulp brownstock washing operations - By James Habermehl 从1943年硅酮被商业应用以来，这种材料日益广泛应用 ince their commercial introduction in 1943, silicones 于一系列行业及加工之中。在纸浆纸张生产及加工操作 have found ever increasing utility in a broad range of 自中也是如此。硅酮用于压敏标签剥离的流水作业已有多 Sindustries and applications. This has also been the case 年。近年来，将硅酮在牛皮纸粗浆洗涤中作为消泡剂使用，具有重 in pulp and paper production and converting operations. 要利益。 Silicones have been used for many years in pressure sensitive 一般情况下，常规矿质油消泡剂都包括乙烯双硬脂酰铵 label release liner production. More recently, significant interest （EBS），这是一种类似于疏水颗粒的蜡状物。基于该技术的消泡 has developed in their use as a defoamer in kraft brownstock 剂已经在去除沥青沉淀上显示出重要贡献。在过渡到“白油”技术 washing operations. 之前，矿物油消泡剂被认为是制浆厂二苯并二恶英（戴奥辛）前体 Conventional mineral oil-based defoamers typically contain 的来源。 ethylene bisstearamide (EBS), a wax-like material, as the 硅酮消泡剂配方中，一般使用疏水硅来替代乙烯双硬脂酰铵， hydrophobic particulate. Defoamers based on this technology 它除了具有杰出的防泡沫性能外，还显示出卓越的纸浆滤水性能。 have been demonstrated to contribute to pitch deposits. Prior