| 摘要 |
<p>The present invention relates to a method of reducing the clogging of nozzles and slits and diminishing the formation of deposits in the spin bath system in the process of making viscose filamentary and film materials by using an amphoteric surfactant having the formula (I): RNA(CnH2nNA)x-1A where R represents a hydrogen or an alifatic group with 1-24 carbon atoms, each A represents a hydrogen, an alifatic group with 1-24 carbon atoms, or BOOCCmH2m-groups, where m is a number from 1-3, B is hydrogen or a salt forming cation, n is a number from 2-3, x is 1-8, and the number of BOOCCmH2m- groups are from 1 to x+2, with the provision that the total number of carbon atoms in the aliphatic groups is from 8 to 45. The amphoteric surfactant has an excellent anticlogging effect, since it is a good dispersant and prevents or reduces precipitation in the spin bath. In addition, it has a low foaming and is very stable.</p> |
