卫生用纸漂白针阔混合浆高浓磨浆工艺研究

Study on the High-consistency Refining Process of Bleached Softwood and Hardwood Mixed Pulps for Tissue Paper Production

关键词:  卫生用纸  高浓磨浆  细小纤维含量  松厚度  纤维配比

Key Words:tissue paper  high-consistency refining  fines content  bulk  fiber ratio

摘要:通过生产线高浓磨浆、生产线高浓磨浆+实验室低浓打浆、生产线低浓磨浆、实验室低浓打浆4种工艺，分别获得混合高浓浆、混合高浓+低浓浆、混合低浓浆和实验室浆，研究了不同打浆工艺对漂白针叶木浆和漂白阔叶木浆混合浆（质量比30∶70）纤维性能及卫生用纸手抄片物理性能的影响。结果表明，与混合低浓浆相比，混合高浓浆的细小纤维含量少，纤维扭结较明显，制备的手抄片松厚度、柔软度及吸水性较好；混合高浓+低浓浆纤维扭结指数更大，细小纤维含量更低；其中，生产线高浓浆的浆浓为18%时，混合高浓+低浓浆手抄片的抗张指数、松厚度、柔软度及吸水性均优于混合低浓浆手抄片；混合高浓+低浓浆手抄片（长纤配比30%，打浆度23 °SR）与实验室浆手抄片（长纤配比35%，打浆度23 °SR）的抗张指数和吸水性相近，松厚度高5.7%、柔软度低27.6%。

Abstract:The effects of different refining processes on the fiber properties of mixed pulp of bleached softwood pulp and bleached hardwood pulp （mass ratio of 30∶70） and the physical properties of handsheets for tissue paper were investigated by four processes： high-consistency refining on production line （HC pulp）， high-consistency refining on production line + low-consistency refining on lab （HC+LC pulp）， low-consistency refining on production line （LC pulp）， low-consistency refining on lab （lab pulp）. Through these four refining processes， the HC pulp， HC+LC pulp， LC pulp， and lab pulp were obtained， respectively. The results showed that compared with the LC pulp， the HC pulp contained fewer fine fibers， the fiber kink index was more obvious， and the prepared handsheet had better bulk， softness and water absorption. HC+LC pulp had a higher fiber kink index and a lower content of fine fibers than LC pulp. Among them， the tensile index， bulk， softness and water absorption of HC+LC handsheet were better than that of LC handsheet when the pulp concentration of high-consistency refining on production line was 18%， and the tensile index and water absorption of HC+LC handsheet （long fiber ratio of 30%， refining degree 23 °SR） were similar to those of the lab handsheet（long fiber ratio of 35%， refining degree 23 °SR）， with 5.7% higher bulk and 27.6% lower softness.