textiles knitted fabrics

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  • origin of synthetic fibres
    • polyester
      • produced by the polymerisation(joining small molecules up to make long ones)of chemical's derived from oil
        • the polymer produced is melted and then extruded into a stream of cold air in a process known as melt spinning
        • is produced in the same way as polyester and also uses melt spinning
          • the polymer produced is melted and then extruded into a stream of cold air in a process known as melt spinning
    • nylon
      • is produced in the same way as polyester and also uses melt spinning
      • micro-fibres
        • synthetic fibres, are less than one denier thickness
          • tactel is often used for sportswear, as it is 25% lighter than cotton
    • fabrics
      • have all sorts of uses such as clothing, automotive, puposes, engineering, interiors and architectures
      • knitted fabrics
        • are made up of a series of interlocking loops.
          • the loops make the fabric stretchy
            • knitted fabrics have further stretch or elasticity by adding lycra
        • weft knitting
          • knitted in horizontal rows with horizontal ribs on the wrong side fabric and V shape loops on the right side of the fabric
            • the loops hold place by interlocking above and below each row
              • fabrics produced byusing this method are;
                • t-shirts
                • sports shirts
                • kinitted sweaters
        • warp knitting
          • fabrics are created using a series of interlocking loops and chains, which run vertically along the fabric
            • this process can only be done by machine
              • creates a firmer fabric which keeps its shape and doesn't ladder when cut
                • fabrics produced by this methodcan be either fine and lightweight(nets and lace)
                  • or heavier such as towelling or velour
    • characteristics of knitted fabrics
      • knitted fabrics are warm
      • knitted fabrics can be bulked using a finishing process called brushing which gives the finished fabric a fluffy surface.can be applied to products such as fleeces

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