Acrylic and modacrylic fiber stabilized against sunlight

Production method of acrylic fiber or modacrylic fiber to be used in outdoor textiles comprising the steps of:

• a) polymerizing at least 85% acrylonitrile and vinyl co-monomer or polymerizing at least 40% acrylonitrile, at least 40% vinylidene chloride and vinyl co-monomer,
• b) preparing a dope solution by dissolving the obtained polymer in polar aprotic solvents,
• c) transferring the dope mixture by means of a pump onto the plates called spinnerets, which have holes to define the fiber diameter,
• d) giving the dope mixture received out of the plates a filament form in the coagulation bath,
• e) washing the filament to remove the excess solvent,
• f) transferring the washed filaments to the finishing bath without allowing them to dry and then drying them,
• g) crimping and annealing filaments obtained after drying,
• characterized in that it includes the following process steps to increase the resistance against surface heating and UV light caused by sunlight,
• adding a HALS solution, UV absorbing solution and IR reflective dispersion, each prepared in a separate container, into the dope solution mentioned in process step b or
• adding the prepared IR reflective dispersion into the dope solution mentioned in process step b,
• adding HALS and UV absorbing material prepared by encapsulation in water separately, into the finishing bath before process step f.