Patent ID: 9611588
Date: 2017-04-04
CPC Classifications: D01D,D01F,D21H,Y10T

Claim:
1. A method for producing a fiber based packaging material with a barrier layer, the method comprising providing a fiber based substrate having a surface, depositing ultrafine polymer fibers having a diameter less than 5 μm on the surface of the substrate by the use of electrospinning or meltspinning, and post treating the substrate together with the polymer fibers on the surface to cause the polymer fibers to melt and coalesce together into a barrier layer film on the surface of the substrate, wherein the post treating step comprises at least one of increasing the temperature of the ultrafine polymer fibers, applying pressure to the ultrafine polymer fibers, subjecting the ultrafine polymer fibers to an electric field, radiation curing of the ultrafine polymer fibers, and decreasing the temperature of the ultrafine polymer fibers.