섬유
Meltblown Lyocell.
- 출판일2002.07
- 저자
- 서지사항
- 등록일
2016.11.02
- 조회수
244
Weyerhaeuser Company's melt blowing method for lyocell fibers manufactures cotton-like fibers that have a natural crimp and low luster and are resistant to fibrillation under wet abrasion conditions. An extruder with multiple spinnerets extrudes filaments into a turbulent high velocity air stream, where an air gap draws them into a regenerating bath. A rotating takeup roll with a slower surface speed than that of the descending filaments collects the drawn fibers. A recycling system collects and recycles the excess N-methyl morpholine oxide for reuse. Pulp with an alpha-cellulose content of less than 90 percent and a degree of polymerization of 300-1,000 ensures that the resultant fibers have a hemicellulose content of 13-15 percent. Laboratory tests using a bleached kraft southern softwood pulp indicated that the absence of the capillary head affected fiber count. Air bubbles and foreign matter had no effect on fiber quality. The method bears United States patent number 6,306,334