Scientific Research Sharing
In the papermaking industry, dry strength is a critical metric that determines a paper’s ability to resist...
ASA or AKD
Added to the wet-end system of the paper machine to improve water resistance of paper, reduce...
1. Overview of Foam Testing Methods
Foam and anti‐foam performance in papermaking can be evaluated...
介绍
内部施胶可以防止水性液体渗透到整个纸张。内部施胶是通过在流浆箱前向纸浆中添加材料来实现的，以阻止水渗透到最终的纸张中。施胶分子的非极性部分可以减缓水的渗透。施胶分子的反应性部分将其锚定在纤维表面。
表面施胶的原理不同，它发生在施胶压榨过程中，淀粉（或其他材料）会填充纸张的毛细孔，使水的渗透变得更加困难。淀粉不像内部施胶剂那样具有疏水性。
自19世纪初开始使用的明矾松香施胶，仅在pH值低于7左右时才有效。碱性施胶则发展于20世纪40年代和50年代。近年来，碱性施胶在美国广泛用于填充碳酸钙的印刷纸，这种纸张的pH值必须在7或更高，因为在酸性条件下，碳酸钙会分解成二氧化碳气体，导致纸张出现麻点。
纸张可能是：
硬质施胶纸（对液体渗透有很强的抵抗力，例如许多印刷和包装纸），
松散尺寸（对液体渗透的抵抗力较低，例如新闻纸），或
无施胶（毛巾、吸墨纸和卫生纸）。
内部尺寸确定有两种常用方法：
松香施胶必须在...
1. INTRODUCTION
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Introduction
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