按连续法生产的粘胶丝的接触烘干具有很多特点:单根丝只有一面与加热辊的表面接触,接触面积只占加热辊的4～8%,而且加热面上丝的填充系数愈高,用于烘干丝的热量的单耗愈低。此外,由于接触烘干通常是在一对辊上实现的,其中一个辊是加热辊,所以丝和丝中含有的水分在这对辊上受到短暂的加热后又迅速冷却,加热和冷却重复发生, The contact drying of viscose silk produced by continuous method has many characteristics: the single silk only has the contact with the surface of the heating roller, the contact area only accounts for 4 ~ 8% of the heating roller, and the higher the filling coefficient of silk on the heating surface , The lower the consumption of heat for drying the wire. In addition, since contact drying is usually performed on a pair of rollers, one of which is a heating roller, the moisture contained in the filament and the filament is briefly heated on the pair of rollers and then rapidly cooled, and heating and cooling are repeated ,