Abstract:

The polarity and water absorption of ramie is reduced after modification,then it can be compounded with polypropylene as new and excellent automobile internal decorating materials.Experiment finds that melamine formaldehyde resin could reduce the ramie fiber's water absorption.But it usually has low storage stability.For improving the storage stability,the property of Melamine formaldehyde resin is modified by polyvinyl alcohol.The influences of the polyvinyl alcohol's addition,reaction's terminal,reaction temperature,pH and pH adjusting way,and solution's pH adjusting temperatures when it arrives reaction's terminal point no storage stability are investigated.The melamine formaldehyde resin can be stored stably for two months long.The ramie fiber was modified by home-made melamine formaldehyde resin,then unmodified and modified fiber's water absorption was detected,the result shows that modified ramie fiber's water absorption reduced notably.

Key words: melamine formaldehyde resin, storage stability, modification, ramie, water absorption