Spunbond method for producing non-woven fabrics with hygroscopic metastatic feature
US9745673B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2015 |
| Grant date | Aug 29, 2017 |
| Priority date | — |
| Expiry date | Mar 3, 2036 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD10B2401/12
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A spunbond method for producing nonwoven fabrics with hygroscopic metastatic feature. Firstly, fuse prepared bio-polyamide 6,10 into a melt via spunbond method, next extrude and spun and draw the melt to form filaments, then bond and lay the filaments on a conveyer to form a substrate fibrous web of bio-polyamide 6,10. Secondly, blend and dissolve prepared pulp by putting N-methylmorpholine N-oxide (NMMO) dissolving solvent, then dehydrate it to form dope, then extrude the dope out by an extruder with external compressed quenching air for converting it into cellulose filaments, then draw, bond and overlay the cellulose filaments to become uniform natural cellulose filaments on existing substrate fibrous web previously to form an overlaid fibrous web in the conveyer. Finally, coagulate, regenerate and convert the fibrous composite of the bio-polyamide 6,10 and natural cellulose into nonwoven fabric with hygroscopic metastatic feature by orderly applying hydro-entangled needle punching, drying, winding-up processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.