High tenacity polyester yarns
AssigneeInvista North America S.A R.L.
InventorHans Frankfort
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Abstract
This invention relates a fully drawn high tenacity yarn and a process for making the same from a partially oriented polyester feed yarn in a drawing process comprised of two stages.
Claims17
A fully drawn, untextured filament yarn made from a polymer containing at least 85% polyethylene terephthalate and having a relative viscosity less than or equal to 25 LRV, the yarn having a tenacity greater than 7.4 grams per denier and an elongation greater than 10%.
A partially oriented feed yarn for drawing and forming an untextured filament yarn made from a polymer having a relative viscosity less than or equal to 25 LRV and having 140%-160% elongation at break.
A process of making a partially oriented feed yarn, comprising the steps of:
- supplying a polymer having a relative viscosity of less than or equal to 25 LRV through a spinneret;
- extruding at least a single filament;
- passing the filaments through a quench delay and a hybrid quench zone;
- and
- coalescing the filaments into a yarn bundle and interlacing.
Dependencies are inferred from the claim text.