P-RC alkaline peroxide mechanical pulping of hardwood, Part 1: aspen, beech, birch, cottonwood and maple

摘要

Intrinsic handsheet physical properties of P-RC APMP pulps from aspen, beech, birch and cottonwood were investigated. The results showed that when compared at the same tensile strength, birch gave the highest bulk, cottonwood the second, and the other three were about the same. Burst property development followed a slightly different trend: birch aspen ≈ beech ≈ cottonwood > maple. For silver maple and aspen, their P-RC APMP pulps had a higher tensile strength at the same density, or a higher bulk at the same tensile strength, than their kraft pulps. The reasons for the difference are discussed.