FASH 290 Lecture Notes - Lecture 7: Acrylonitrile, Phaseolus Lunatus, Tyvek
Document Summary
Raw material is made (synthesized from other shorter molecules) then that raw material is made into fibers (or other things) Raw material is produced through addition or condensation polymerization -cold or hot drawn often modified/engineered. Solubility only reliable test - most are melt spun (acrylic is(cid:374)"t and has significantly different properties) 1939- first syn. fiber (research started in 1928) melt spun polyamide, condensation polymer cold drawn. Fibers (not an elastomer) -color scavenger - oleophilic -like most synthetics, more comfortable as a knit fabric vs. woven. 1951 (usa dacron by dupont) melt spun, condensation polymer hot drawn. Work horse of apparel industry - like most syn. Not affected by moisture so maintains strength when wet. Resembles (not feel like or comfort of) most natural fibers -uncomfortable unless modified - oleophilic, holds bacterial oders. Good for fiber fill due to high resiliency (not thermal retention), produced in filament and staple form. Us production 19(cid:1010)0"s (research started i(cid:374) 20"s (cid:895) low (cid:373)elti(cid:374)g pt.
