聚乙二醇(PEG)改性对无碳复写纸微胶囊粒径分布的影响

Effect of Polyethylene Glycol Modification on Particle Size Distribution of Microcapsule in Carbonless Copy Paper

无碳复写纸所用的微胶囊由乳化液与三聚氰胺-甲醛树脂乳化合成。通过实验用聚乙二醇（PEG）对乳化液中的苯乙烯-马来酸酐（SMA-520）和三聚氰胺-甲醛树脂进行结构改性,实验结果表明：采用PEG-200改性可使微胶囊的粒度分布集中在6~9μm,完全达到了无碳复写纸中微胶囊最佳粒经4~10μm的要求。

The microcapsule in carbonless copy paper is made of emulsion and melamine-formaldehyde resin. Styrene-maleic anhydride and melamine-formaldehyde resin（ SMA-520） are modified by polyethylene glycol（ PEG） in this paper. The results show that the particle size range of microcapsule in carbonless copy paper can be 6 ~ 9 μm. It can meet the requirements of the optimal particle size 4 ~ 10 μm for the microcapsule in carbonless copy paper.