Importance

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Abstract

A process for the preparation of a homogeneous spinning solution for the production of acrylic fibers comprising:

i) preparation of a homogeneous suspension by mixing a powder homopolymer or copolymer of acrylonitrile with a mixture of DMSO/water ranging from 94.5/5.5 to 97/3% w/w at a temperature ranging from 5° C. to 10° C., said mixing being carried out in a time from 5 to 30 minutes, by spraying a stream of the DMSO/water solvent onto a stream of powder homopolymer or copolymer of acrylonitrile, disgregated and premixed;ii) heating the homogeneous suspension from step i) to a temperature from 70° C. to 150° C. in a time from 0.5 to 30 minutes, until the complete dissolution of the homopolymer or copolymer and the formation of a homogeneous solution. This spinning solution is then fed to a storage tank or to the spinning line.

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First Claim