TXMI 3500 Lecture Notes - Lecture 8: Melt Spinning, Diamine, Nylon 66
24 Feb 2017
School
Department
Course
Professor
Document Summary
Synthetic fibers are fibers made from synthetic polymers made from basic raw materials by addition or condensation polymerization. Heat sensitive: softens or melts with heats. Chemically resistant: resistant to most common fiber degradants: non-biodegradable. Pilling: formation of tiny balls of fiber on fabric: fiber tenacity affects pilling, decrease molecular weight to decrease pilling. Static electricity: soil and lint cling; problems in production and use: attracts soil, dust, and lint, hydrophobic. Fiber size and cross section easily modified: controlled by shape of spinneret. Low pilling fiber: reduce flex life by reducing molecular weight. High tenacity fibers: by drawing/stretching, chemical modifications, or combination. Low elongation fibers: use in blends: cellulosic fibers add strength and abrasion resistance. Burn test: synthetic fibers will melt while natural fibers will burn but not melt; not a good test for blends or fr/heat resistant fibers. Microscopic appearance: not a reliable method; no unique visible characteristics.
