精梳棉、长绒棉和棉短绒三种棉浆的打浆性能比较研究

Comparative Study on the Refining Performance of Combed Cotton, Long Staple Cotton, and Cotton Linter Pulp

关键词:  棉浆  打浆  分丝帚化  比表面积

Key Words:cotton pulp  refining  fibrillation  specific surface area

摘要:本论文以精梳棉、长绒棉和棉短绒三种棉浆为研究对象,分析了三种棉浆的打浆历程,研究了三种棉浆的纤维形态、表面形貌在打浆过程中的变化规律,探讨了打浆程度对棉浆比表面积的影响,并比较了三种棉浆的纸页物理性能。研究结果表明,当目标打浆度为60.0°SR时,精梳棉、长绒棉和棉短绒三种棉浆所需打浆转数分别为30、33和23 kr。相同打浆转数时,长绒棉的打浆度和保水值最低、纤维长度最大、比表面积最小,说明长绒棉吸水润胀、分丝帚化程度和横向切断程度低于精梳棉和棉短绒。当打浆度为60.0°SR左右时,,长绒棉的抗张指数比棉短绒高约34%,其耐破指数分别比精梳棉和棉短绒高24%和65%,其撕裂指数分别是精梳棉和棉短绒的1.9倍和2.4倍。

Abstract:This study investigated the refining performance of three types of cotton pulps: combed cotton, long-staple cotton, and cotton linters. The research analyzed the refining process, examines changes in fiber morphology and surface characteristics during refining, evaluated the impact of refining degree on specific surface area, and compared the physical properties of paper sheets made from these pulps. Results shown that to achieve a target beating degree of 60.0°SR, the required refining revolutions for combed cotton, long-staple cotton, and cotton linters are 30, 33, and 23 kr, respectively. At the same beating revolutions, long-staple cotton exhibited the lowest beating degree and water retention value, the longest fiber length, and the smallest specific surface area, indicating lower levels of hydration, fibrillation, and lateral cutting compared to combed cotton and cotton linters. When the beating degree was approximately 60.0°SR, the tensile index of long-staple cotton was about 34% higher than that of cotton linters. The burst index was 24% and 65% higher than that of combed cotton and cotton linters, respectively, while the tear index was 1.9 and 2.4 times greater than those of combed cotton and cotton linters, respectively.