新闻纸厂胶粘物组分的分离与分析

对新闻纸厂网前筛筛板上的沉积胶粘物进行了分离与分析.结果表明,以聚醋酸乙烯酯和聚丙烯酸酯为代表的人工合成聚合物以及机械浆中的木材树脂是产生胶粘物的根本来源,但它们在胶粘物沉积中的含量只有约5%.胶粘物沉积中大部是无粘性的碳酸钙和细小纤维,说明碳酸钙等物质会与具有粘性的树脂类物质粘附在一起形成大量的沉积物.

Separation and Analysis of the Stickies Deposit in Newsprint Mill

A lot of contaminants such as pressure-sensitive adhesive,hot melt adhesive,coating adhesive,ink binding adhesive from waste paper as well as the lipophilic wood resins are released and dispersed in the pulp suspension in newsprint mills where secondary fibers are used,and those contaminants can form the deposit on the forming wire,press section and dryers or the surface of paper sheets,which is harmful to the production efficiency and the product quality.The deposit from the pressurized screen before the wire section in Nanping Paper Mill was sampled and analyzed,and the results showed that polyvinyl acetate(PVAc),polyacrylate(PA) and the wood lipophilic extractives were the representatives of the deposit,but their content in the deposit was only about 5%.Most of the substances in the deposit were the non-sticky calcium carbonate and fines that could adhere to the sticky contaminants and deposit together,resulting in a great deal of the deposit.