Norafin – Spunlace

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Spunlaced non wovens from Norafin

The spunlace process

Spunlace technology, also known as hydroentanglement, uses fine high pressure water jets to entangle dry-laid short staple fibres into a coherent textile-like fabric. In addition, Norafin spunlace process allows the production of multi-layered structures with the inclusion of scrims and other roll goods. The schematic below demonstrates the basics of the spunlace process.

The spunlace process

The spunlace process

Characteristics

Characterised by binder free processing, even fibre dispersion, relatively low bulk and through thickness fibre architecture, spunlaced nonwovens have relatively high tensile strength and good dimensional stability.

With potential base weights of 15 – 750g/m2 the spunlace process gives a non woven with the following material characteristics:-

  • light weight, tear resistant, durable
  • homogeneous, flexible, conformable
  • binder free – easily conformable around complex curvatures
  • 3 dimensional fibre orientation
  • isotropic MD:CD properties
  • rapid wet-out, easy-to-impregnate
  • intermediate fibre volume fraction
  • apertured for rapid resin wet out or “flat” for optimum surface finish

The photo below shows a spunlaced  apertured para aramid material

Apertured para aramid

Apertured para aramid

Composite processes

Spunlaced non wovens from Norafin are suitable for the following composite manufacturing processes:-

  • hand lay-up
  • pultrusion (click here for more information)
  • mandrel winding and filament winding (click here for more information)
  • roll wrapping
  • vacuum infusion
  • resin transfer moulding (RTM) and vacuum assisted resin transfer moulding (VARTM)

Applications

Spunlace non –woven products for applications in composites include:-

  • polyester for high quality surface, enhanced resistance to corrosion and UV exposure
  • para-aramid for improved impact and wear resistance
  • basalt, pre-ox and phenolic fibres for surface fire protection
  • conductive blends for surface static dissipation, EMI shielding and heating applications, etc.
  • flax for biodegradable eco-friendly credentials, good vibration and UV absorption properties and a pleasing, natural aesthetic finish

For more information about composite products from Norafin Industries please visit www.norafin.com