Abstract:

 Pea starch was used as raw material to produce film forming agent in this study. The starch was processed by isoamylase firstly, and then the obtained product was subjected to hydroxypropylation. We studied the effects of enzyme reaction time, the dosage of propylene oxide, etherification time, reaction temperature and the dosage of sodium hydroxide on the performance of film forming agent. The reaction conditions were optimized via orthogonal test as follows: enzyme reaction time was 12 h, propylene oxide 4 g, reaction time 16 h, reaction temperature 45 ℃, sodium hydroxide 0.4 g. The results show that the modified product as the filmforming agent in glass fibre sizing could ensure the successful drawing process.

Key words: sizing, pea starch, etherification, filmforming agent