Melt spinning solution dyed filaments and improved spin pack the

Details Melt spinning solution dyed filaments and improved spin pack the Melt spinning solution dyed filaments and improved spin pack the

1981-02-23

1982-07-20

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With step of cleaning, polishing, or preconditioning...

264 78, 264176F, B28B 704

Patent

active

043405525

ABSTRACT:
A method of melt spinning solution dyed polypropylene filaments, with quicker color changes, comprises passing solution dyed polypropylene melt of a first color at a temperature below 400.degree. F., particularly in the range 350.degree. F. to 360.degree. F., through a plurality of shallow horizontally disposed cavities in a spin pack. Each cavity contains a set of horizontally disposed mesh screens which occupies at least one-third of the depth thereof, the melt passing through all of the sets of mesh screens and occupying only a low internal volume in the spin pack as it passes therethrough and is extruded therefrom. Then, when it is needed to change color, natural polypropylene melt is passed through the spin pack and natural filaments extruded. Thereafter, solution dyed melt of a second color is passed through the spin pack and filaments of the second color extruded, the color change from the first color to the second color being effected quickly and completely by purging through the spin pack.

REFERENCES:
patent: 2883261 (1959-04-01), McGeorge
patent: 2947598 (1960-08-01), Mavagliano et al.
patent: 3028627 (1962-04-01), McCormick
patent: 3634576 (1972-01-01), Stuchlik
patent: 3938925 (1976-02-01), Lees
patent: 3969312 (1976-07-01), Lees
patent: 4225299 (1980-09-01), Roberts

Affiliated with

Also associated with

Rating

Melt spinning solution dyed filaments and improved spin pack the does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Melt spinning solution dyed filaments and improved spin pack the, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Melt spinning solution dyed filaments and improved spin pack the will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-249888