HUEC 2040 Exam 3

HUEC 2040 Exam 3 - AcrylicsProperties Luster...

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Unformatted text preview: AcrylicsProperties Luster Lustered&delustered o Titanium dioxide Crimped o Decreased luster Specific gravity lightweight, soft bulkiness similar to nylon Elasticity& resilience Low elasticity & recovery o Goodelongation Goodexcellent resiliency o Crimpedgood bending recovery & compressibility Absorbency & Moisture regain Good wicking o Quick drying o Wicks on surface, doesnt take in the moisture Low moisture absorbency o Does not shrinkwet o Low absorbency=more static, more uncomfortable to wear Low moisture regain o Does not dye well Dimensional Stability Does not shrink when wet Launderingcare labels Heat setthermoplastic o Does not melt Electrical Conductivity Low Antistatic finishes EX: taking things out of the dryer Effects of heat: combustibility Burning o Ignites, burns o Hard black bead residue Does not exhibit typical melt Steamshrinks High, dry heatyellows, darkens Heat set Chemical reactivity Excellent chemical resistance, heat & UV light resistance Dry cleaning solventsok Bleachesok Resistance Microorganisms, mildew o Odor, mildew resistant Sunlight o Very good to excellent Agingno effect Bicomponent Acrylics Extruding 2 different acrylic materials together as one fiber o Each different shrinkage properties Knitted goods Laundered & tumble-dried o Returns to crimped & bulked shape Uses Sweaters, fleece fabrics, hand knitting yarns, blankets, carpets Drapery & upholstery fabrics Alone or in blends CAST ACRYLICUSES LENS o Electrical testing o Scientific equipment o Furniture Care procedureacrylics Follow care labels Laundered & dry-cleaned Lower dryer setting o Remove immediately MODACRYLICS 1949 o Manufactured before acrylics o Union carbide company 1960FTC o Separate classification A manufactured fiber in which the fiber forming substance is ANY synthetic polymer composed of less than 85% but at least 35% by weight of acrylonitrile units Modacrylicsmanufacture Acrylonitrile& other materials Dissolved in appropriate solvent Spun, drawn & cut in staple length o Dry or wet spun MODACRYLICS ARE SOLD ONLY AS A STAPLE FIBER Crimp addedend use Modacrylicsproperties Physical appearance Cross sectional o I r regular flat shape o U-shape to peanut shape Longitudinal o Striations o Grainy effect on surface Strength o Relatively strong giber Specific gravity o Comparable to wool o Thermo insulator Light weight, soft Yet keeps you warm o Natural hand Softness similar to animal fur Elasticity & resiliency o Good elastic recovery Stretching, bending o High resilience Return to shape o Modulus & elongation Slightly higher than acrylic Absorbency & moisture regain o Low o Dyeable o Quick drying o Good stain resistance Waterborne soil Dimensional stability o Good stability o Good shape retention...
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This note was uploaded on 05/06/2010 for the course HUEC 2040 taught by Professor Staff during the Fall '08 term at LSU.

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HUEC 2040 Exam 3 - AcrylicsProperties Luster...

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