Abstract Conjugate filaments the components of which are comprised of the same constituents in dissimilar relative concentrations are produced by allowing the constituents of the molten stream of blended incompatible polymers partially to segregate in a forced flow conduit so that material removed from the outer periphery of the stream near the wall of the conduit will be of different relative concentration of constituents than material remaining near the center of the conduit and then removing separate streams of partially segregated material which are fed through suitable spinnerets to produce conjugate filaments. In another embodiment yarns the filaments of which are comprised of the same constituents in dissimilar relative concentrations are produced in the same manner.
A method of claim 1 wherein said molten polymer nearest said conduit wall is pumped from said conduit.
Claim 2
Dependent Claim
41 words
A method of claim 2 wherein said material nearest said conduit wall is removed from the conduit by the action of a gear pump with gears placed in the flow within the conduit to preferentially remove polymer nearest said conduit wall.
Claim 3
Dependent Claim
69 words
A method for producing conjugate filaments comprised of components of dissimilar concentration from a molten blend of incompatible polymers which method comprises: (a) producing streams of molten polymer of dissimilar concentration by the method of claim 1 and (b) passing said molten streams separately into a spinpack suitable for producing continuous conjugate filaments wherein the molten polymer is joined in the conjugate elements by passage through the said spinpack.
Claim 4
Dependent Claim
18 words
A method of claim 4 wherein said conjugate filaments are of a type chosen from sheath-and-core and side-by-side.
Claim 5
Dependent Claim
85 words
A method for producing yarn comprised of filaments of dissimilar concentration of blended incompatible polymers which method comprises: (a) producing streams of molten polymer of dissimilar concentration by the method of claim 1 and (b) passing said molten streams separately into a spin-pack suitable for producing a yarn from dissimilar feed materials so that the yarn produced has some filaments comprised of an incompatible polymer blend dissimilar in concentration from the concentration of the blend of incompatible polymers in the remaining filaments of the yarn.