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US 2012/0256357 A1Published application
Use of coanda effect devices to produce meltblown webs with improved side-to-side uniformity
Assignee3M Innovative Properties Company
InventorsWilliam P. Klinzing, Andrew W. Chen, James C. Breister, Patrick J. Sager
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Abstract
An apparatus for producing meltblown webs includes a meltblowing die having a plurality of filament outlets, a collector for receiving filaments of polymeric material expelled from the filament outlets, and a first Coanda effect device positioned adjacent to the path of the filaments adjacent to the last filament outlet at an end of the meltblowing die. Methods of forming meltblown webs using such an apparatus are also disclosed.
Claims17
A meltblowing apparatus, comprising:
- a meltblowing die having a plurality of filament outlets,
- a collector for receiving filaments of polymeric material expelled from the filament outlets, and
- a first Coanda effect device positioned adjacent to the path of the filaments adjacent to the last filament outlet at an end of the meltblowing die.
A method of forming a meltblown media, comprising:
- providing a meltblowing die having a plurality of filament outlets,
- positioning a first Coanda effect device adjacent to a first end of the meltblowing die,
- expelling molten filaments from a meltblowing die,
- manipulating the flight of the molten filaments with the first Coanda effect device, and
- collecting the molten filaments to form a web of nonwoven fibrous media.
2 more elements
Dependencies are inferred from the claim text.