添加回收脱墨废渣纤维对硫酸盐浆的影响

通过对北京造纸七厂脱墨废渣进行成分分析,并将回收的细小纤维按不同比例添加至硫酸盐浆抄纸,测定浆料的保水值及纸张的物理性能,并进行X-衍射、表面静态接触角、扫描电镜分析。研究结果显示:脱墨废渣中含有7.75%未过100目的纤维,7.37%的100～200目的纤维。将未过100目的纤维经两段2%H2O2漂白后加入硫酸盐浆抄纸,随加入量从0增加到30%,保水值、浆料纤维结晶度和接触角变化不明显;当细小纤维加入量为10%时,纸张性能略有下降。电镜分析显示加入的细小纤维进入到纤维交织的空隙中。结果表明,废渣可以部分代替原始浆料,为脱墨废渣纤维的回收利用打下基础。

Effects of Adding Recycled Fiber from Deinked Pulp Sludge into Kraft Pulp

The composition of deinked pulp sludge was analyzed and the fine fiber was recycled from it.Water retention value(WRV) and physical properties of the paper were determined.X-ray diffraction,surface contact angle and scanning electron microscopy(SEM) were applied to evaluate the properties of the kraft pulp with different proportions of fine fiber.Results showed that the deinked pulp sludge contained 7.75% fine fibers(R100 fiber) and 7.37% fibers in 100-200 mesh sizes.After a two-stage H2O2-bleaching,the R100 fiber was added into the kraft pulp.The WRV,fiber crystallinity,and contact angle changed insignificantly with the proportion increasing from 0 to 30%.When 10% R100 fiber was added into the kraft pulp,the physical properties of the paper decreased slightly.SEM analysis exhibited that the fine fibers run through the gaps of intercrossing fibers.The results indicate that recycled fiber from deinked pulp sludge can partially replace kraft pulp.