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US 2022/0010458 A1Published application
Spinneret block with unitary spinneret body and nozzles for use in the manufacturing of spun-blown fibers
AssigneeTeknoweb Materials S.R.L.
InventorFabio Zampollo
Life of this patent
Estimating the term…
Abstract
The present invention relates to a particular execution for a die block for spun-blowing process for forming a fibers or filaments that may further form a spun-blown web or nonwoven comprising such a formed fibrous web, e.g. as a layer in a multi-layer composite web. The die block comprises a spinneret block with unitary spinneret body and nozzles.
Claims18
A die block for forming meltblown filaments comprising:
- wherein said spinneret block, said air distribution plate, said exterior air plate, and said cover strip mounted in this order and secured by said securing means such that
- said nozzles protrude through corresponding openings in said air distribution plate and further through corresponding openings in said exterior air plate, and
- such that polymer passageways are formed for molten polymer passing from said polymer supply side of said spinneret body through said nozzles;
- and
- such that air passageways are formed for air passing from said air supply through openings in said air distribution plate and said exterior air plate;
- whereby said openings in said exterior plate and said nozzles are adapted so as to allow molten polymer exiting said nozzles and air flowing through the openings of said exterior air plate are essentially parallel,
- wherein
- said spinneret body and said nozzles are unitary.
5 more elements
(canceled)
A method for the manufacture of a die block comprising a spinneret block comprising a spinneret body and a plurality of nozzles, an air distribution plate, and an exterior air plate, comprising:
- providing a single piece of die block precursor;
- machining from said single piece of die block precursor
- a spinneret block comprising
- nozzles;
- air inlet and distribution chamber;
- an air distribution plate;
- an exterior air plate,
- wherein said machining is high precision CNC treatment.
5 more elements
(canceled)
Dependencies are inferred from the claim text.