THREE-DIMENSIONAL FORMABILITY OF PAPER
In this paper factors that control the extensibility and formability of paper are reviewed and described in a systematic way.The extensibility of paper depends on three principal factors: single fibers,inter-fiber con-nections,and the structure of the fiber network.Exten-sibility of fibers can be increased by several means,but highly extensible fibers do not necessarily form paper with high extensibility.This emphasizes the role of inter-fiber connections and network structure in this property.On the other hand,an increase in extensibility is accompanied often by the reduction in tensile stiff-ness and tensile strength.With suitable chemicals,both the strength and extensibility of paper can be improved simultaneously.Recent advancements in the improvement of the ex-tensibility of paper are also presented.Several ap-proaches have been studied: mechanical modification of fibers,application of polymers to the paper,in-plane-compaction and free shrinkage during unre-strained drying.In best cases the contribution of several combined treatments was found to be additive.Elon-gation of paper could be improved from 4%to 30%by a combination of several methods.Such improvements in the elongation of paper imply a great potential to con-tribute to the development of novel and attractive pa-per-based packaging.
E.Retulainen A.Vishal J.Kouko
VTT Technical Research Centre of Finland,P.O.Box 1603,Koivurannatie 1,4010,Jyv(a)skyl(a),Finland VTT Technical Research Centre of Finland,P.O.Box 1603,Koivurannatie 1,4010,Jyv(a)skyl(a),Finland;now
国际会议
第五届制浆造纸新技术国际研讨会(ISETPP)暨第三届国际造纸与环境学术大会(IPEC)
广州
英文
1-4
2016-11-07（万方平台首次上网日期，不代表论文的发表时间）