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Method for the production of polypropylene yarn

Image Number 2 for United States Patent #5277859.

A process and apparatus for producing multi filament yarn from polypropylene polymer. The process includes the steps of spinning an undrawn yarn using a spinnerette, and winding the undrawn yarn on a bobbin. Subsequently the undrawn yarn is unwound so that no twist is imparted to the yarn and the yarn is then drawn between godet rollers through a convection oven, the drawn yarn being wound on a bobbin.

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