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NYLON. Tutor: Josanne Ghirxi B.Pharm (Hons), P.G.C.E. School: St Benedict College, Margaret Mortimer GJL, Malta. A Project by Deborah Francalanza. Nylon - Definition. A generic classification for a family of synthetic polymers known as polyamides.

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Nylon l.jpg

Tutor: Josanne Ghirxi B.Pharm (Hons), P.G.C.E.

School: St Benedict College, Margaret Mortimer GJL, Malta

A Project by Deborah Francalanza

Nylon definition l.jpg
Nylon - Definition

  • A generic classification for a family of synthetic polymers known as polyamides

  • First produced on the 28th February 1935 by Wallace Hume Carothers, an American chemist, at DuPont

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DuPont Corporation

  • An American chemical corporation

  • Currently the world's second largest chemical company in terms of market capitalization

  • Wallace Hume Carothers appointed as head of DuPont Organic Chemistry Department in 1927

  • Carothers was born on the 27th April 1896 in Iowa and died in 1937

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Early history of nylon production

  • To replace Asian silk with a similar, durable but less costly product

  • Carothers produced half-an-ounce of a polymer (labelled as polyamide 6-6) at DuPont Corporation on 28th February 1935. The polymer was eventually developed into a commercial product - Nylon

  • Early use of nylon was in parachutes, tyres, tents, ropes, ponchos and other military supplies

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Characteristics of nylon

  • Varies in luster

  • Durable and elastic

  • Easy to wash and can dye

  • High resistance to insects, fungi and chemicals

  • Abrasion resistant

  • Melts instead of burning

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Modern use of Nylon

  • Clothing - footwear, velcro, carpet fibre

  • Auto parts - petrol tanks, gears, bearings

  • Abseiling gear - slings and ropes

  • Sports items – racquet strings, basketball netting, fishing lines

  • Strings - music instruments

  • Medical equipment - filtering media in sterilising, sutures

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Visit to Nylon Knitting Malta Limited

  • Production of synthetic fibres and finished fabric used in diapers from raw material

  • Raw material (PA6) arrives in big bags and unloaded into silos

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Extrusion and Spinning

  • PA6 is fed to the extruder

  • Heated into a molten state and pressure fed from the extruder via heated jacket tubes to spinning pumps

  • Polymer is forced through a complex filtration system and finally through spinerettes

  • Yarn is automatically wound on spools to a pre-determined weight

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Draw Warping and Warp Knitting

  • Draw warping machine runs new load of yarn whereby beams with defined number of threads and meterage are produced

  • Beams are loaded on knitting machines that produce fabric rolls of a chosen type, width, and length

  • Finished rolls are transferred to packing machines, labelled, and checked prior exportation

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