石棉胶乳板的抄取工艺

Papermaking Process of Asbestos Latex Sheets

研究石棉胶乳板的抄取工艺。研究发现,石棉纤维含有大量的细小纤维,达到71.57%,因此在打浆时,应以疏解分丝为主,尽量减少纤维的切断。采用PFI磨浆,转数为1500r,此时石棉胶乳板的抗张指数最大,但石棉纤维打浆度高达84°SR,滤水困难。采用CPAM/膨润土助留助滤体系,使石棉纸料的打浆度有明显下降,并且CPAM的最佳用量为0.08%,膨润土的最佳用量为0.25%;APAM的加入使纸料的打浆度大幅度降低,最佳用量为0.08%。

This paper investigates the papermaking technology of asbestos latex sheets. It was found that asbestos fiber contained a large number of fiber fines, reached 71.57%, so it should mainly be scattered and be splited as well as minimize the cut fiber. When the refining revolution reached 1 500r, the tensile strength of asbestos latex sheets reached maximum. At this time, the beating degree of asbestos fibers also reached maximum of 84~SR, and drainability performance was difficulty. In CPAM / bentonite retention and drainage system, the beating degree of asbestos paper materials was decreased significantly, and this system could be used as retention and drainage system for sheet,0.08% and 0.25% were the optimal dosage for CPAM and bentonite. Adding APAM, the beating degree of asbestos paper materials could be decreased and 0.08% was the optimal dosage.