Die head assembly, apparatus, and process for meltblowing a fiberforming thermoplastic polymer
US6200120A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1997 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Dec 31, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/68
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A die head assembly for meltblowing thermoplastic material comprising a first chamber for receiving a pressurized fluid, a second chamber for receiving a pressurized molten thermoplastic material, the second chamber defining an outlet through which the molten thermoplastic material exits the die head, and a fluid tube removably securable to the first chamber and defining a passageway having an inlet in communication with the first chamber and an outlet extending at least into the outlet of the second chamber. The die head assembly of claim 1, wherein the outlet of the second chamber defines a longitudinal axis, and the outlet of the second chamber and the outlet of the fluid tube define at least one elongated opening therebetween elongated in a direction extending substantially perpendicular to the longitudinal axis, the molten thermoplastic material passing through the elongated opening as it exits the die head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.