ผลของไฟน์ต่อสมบัติทางกายภาพของกระดาษจากเยื่อโซดายูคาลิปตัส

• Main Author: แพรวพรรณสิริ มีพงษ์
• Other Authors: กุนทินี สุวรรณกิจ
• Format: Theses and Dissertations
• Language: Thai
• Published: จุฬาลงกรณ์มหาวิทยาลัย 2011
• Subjects: กระดาษ; เยื่อกระดาษ; ยูคาลิปตัส; Paper; Wood-pulp; Eucalyptus
• Online Access: https://digiverse.chula.ac.th/Info/item/dc:34669
• Institution: Chulalongkorn University

Physical properties of paper not only depend on process and chemicals but the fiber also has a strong impact on physical properties of paper as well. Fines, defined as small fibers or fiber fragments that can pass through 200-mesh screen can have an impact on paper properties in various ways. In this research, the effects of fines on properties of paper made from bleached and unbleached Eucalyptus fines and pulps were examined by mixing bleached and unbleached fines in various dosages up to 30% with bleached and unbleached pulps. It was found that increased fines content led to decreased fiber length, curl index, kink index and fiber width. Bleached pulp provided higher curl and kink index than unbleached pulp. Paper which contained unbleached fines and/or pulp had high opacity but low brightness. Fines and pulp types did not have a strong impact on paper density as compared to fines content which higher fines content slightly offered denser paper. Fines content also affected paper smoothness because higher fines contents led to smoother paper. Tear index decreased with increasing amount of fines in paper; however, tensile index increased with higher percentage of fines but up to a certain point where the amount fines higher than 20% decreased tensile index. Influences of fines content, pulp types and fines types on physical properties of paper are quite different in each property. However, interfiber bonding and fiber strength are also important for and related to paper properties as well.