Process and system for blending a plasticizer with a polysaccharide ester polymer
AssigneeCelanese International Corporation
InventorJoseph Grenci
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Abstract
A process is disclosed for combining a polysaccharide ester polymer with one or more plasticizers in a way that produces a homogeneous blend. The polysaccharide ester polymer can be in the form of particles and fed to a heated extruding device. Separate quantities of plasticizer can then be combined with the polysaccharide ester polymer particles as they are conveyed through the extruding device. Through the process of the present disclosure, a homogenous blended product can be formed that can then be used to form various articles including fibers, films, and molded articles.
Claims20
A process for producing a polysaccharide ester polymer product comprising:
- feeding polysaccharide ester polymer particles into a heated extruding device, the heated extruding device defining a heated barrel having a length;
- after the polysaccharide ester polymer particles have been heated, combining the polysaccharide ester particles with a first quantity of a first plasticizer within the heated extruding device to form a polysaccharide ester polymer and first plasticizer blend;
- combining the polysaccharide ester polymer particles and first plasticizer blend with a second quantity of a second plasticizer in the heated extruding device downstream from where the polysaccharide ester polymer particles were combined with the first plasticizer;
- and
- discharging a plasticized polysaccharide ester polymer product from the heated extruding device;
- wherein the first plasticizer is added to the plasticized polysaccharide ester polymer product in relation to the second plasticizer at a weight ratio of from about 1:2 to about 1:12.
Dependencies are inferred from the claim text.