Patent ID: 9587329
Date: 2017-03-07
CPC Classifications: D01D,D04H

Claim:
1. A process for meltblowing polymer into a fibrous material having high beta crystalline content, the process comprising the steps of: extruding and moving melted polymer to a meltblowing die; receiving the melted polymer from the extruder with a plurality of longitudinally extending die tips, each die tip having a spinneret; attenuating melted polymer axially from the plurality of spinnerets; flowing hot air through longitudinal fluid material flow through passages disposed along each longitudinal side of each die tip, contacting the melted polymer at the spinneret polymer outlet, and axially attenuating the melted polymer from each spinneret in fibrous form; spraying a liquid into the fibrous melted polymer immediately upon being attenuated from each die tip wherein a substantial amount of liquid being sprayed is at an angle between about 20° and about 85° toward the attenuation axis of the die tip; and collecting the fibers attenuated from each spinneret.