The advances of production process are mainly applications of two stage filtration, full filtrate circulation, filter aids, membrane solvent recovery, dewaxing at room temperature, etc.

工艺进展主要是两段过滤、全滤液循环、助滤剂应用、渗透膜溶剂回收、室温脱蜡等。

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Using NaSCN as solvent, flat acrylic fiber was produced by two-step wet spinning process. The selection of spinneret shape and the optimization of process conditions were discussed.

采用硫氰酸钠为溶剂，湿法二步法工艺生产扁平腈纶，探讨了喷丝板的选型和生产工艺的优化。

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The total process of solvent induced crystallization (SINC) includes two steps: the permeation-diffusion of solvent in PET and the crystallization of PET plasticized with solvent.

PET溶剂诱导结晶过程总体上可分为溶剂渗透扩散过程和PET被溶剂增塑后的结晶过程二个阶段。

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