玉米纳米淀粉在低定量涂布纸中的应用研究

Study on the Application of Corn Nanostarch in Light Weight Coated Paper

中文关键词:  玉米纳米淀粉  双螺杆挤压  低定量涂布纸  涂料

Key Words:corn nanostarch  twin screw extrusion  light weight coated paper  coating

中文摘要:

      采用双螺杆挤压法制备玉米纳米淀粉并研究其作为涂布胶黏剂在低定量涂布纸（LWC）中的应用。结果表明，玉米纳米淀粉颗粒的结晶区被破坏，结晶度显著下降，玉米纳米淀粉平均粒径100 nm左右；玉米纳米淀粉为白色粉末，冷水可溶，黏度低，可直接以干粉形式与颜料一起分散配料；在丁苯胶乳与普通涂布淀粉比例为8∶4的涂料配方中，采用6份玉米纳米淀粉同时取代4份普通涂布淀粉和4份丁苯胶乳时，涂料的保水性能提高62.6%，涂布后LWC的印刷表面强度提高12.9%，其他各项性能指标满足要求。

Abstract:

      The corn nanostarch prepared by twin screw extrusion was used as coating adhesive in light weight coated paper in this study. The results showed that the crystalline area of corn nanostarch granules was destroyed by twin screw extrusion， and its crystallinity was decreased and its average particle size was about 100 nm. When the coating formula of styrene butadiene latex and coating starch ratio of 8∶4，was replaced by the formula of styrene butadiene∶cornnanostarch=4∶6， the water retention valueof the coatings decreased by 62.6%， the printing surface strength of the LWC increased by 12.9%， and other performance requirements were satisfied．