FibreMax can produce lightweight precision cables out of almost any fibre material. Each fibre material has its own distinctive properties. The choice for the right fibre is depending on the characteristics of the application. The need for strength or break load, stretch, dimensions or fatigue life will be of influence on the right fibre choice. Also other issues like weight, costs and lifespan can influence the choice. In order to bring light to the different types of fibres we summarize the most common types and their properties.
Polyester is a category of polymers which contain the ester functional group in their main chain. Although there are many polyesters, the term “polyester” as a specific material most commonly refers to polyethylene terephthalate (PET). The Federal Trade Commission’s definition for Polyester fibre: a manufactured fibre in which the fibre-forming substance is any long chain synthetic polymer composed of at least 85% by weight of an ester of dihydric alcohol and terephthalic acid.
– Good strength-to-weight ratio.
– Moderate elongation (15% – 20%).
– Highest UV resistance of any fibre.
– Good abrasion resistance.
– Keeps strength when wet.
Aramid fibres are a class of heatresistent and strong synthetic fibres. The name is a shortened form of “aromatic polyamid”. They are fibres in which the chain molecules are highly oriented along the fibre axis, so the strength of the chemical can be exploited. The Federal Trade Commission’s definition for aramid fibre: a manufactured high-modulus fibre in which the fibre-forming substance is a long-chain synthetic aromatic polyamide in which at least 85% of the amide linkages are attached directly to aromatic rings. Aramid is also known by its trade names Kevlar® or Twaron®.
– Mainly known as Kevlar® or Twaron®.
– Excellent strength-to-weight ratio.
– Highest resistance to heat of any fibre.
– Very low creep.
– Very low elongation (2,4%).
– Poor abrasion resistance.
– Susceptible to axial compression fatigue.
– Non conductive.
– Poor UV resistance.
HMPE (High Modulus Polyethylene) is a subset of the thermoplastic polyethylene. It has extremely long chains, with molecular weight numbering in the millions, usually between 2 and 6 million. The longer chain serves to transfer load more effectively to the polymer backbone by strengthening intermolecular interactions. This results in a very tough material, with the highest impact strength of any thermoplastic presently made.
– Mainly known as Dyneema®, Spectra® or Plasma®.
– Highest strength-to-weight ratio of any fibre.
– Highest abrasion resistance of any fibre.
– Excellent dynamic toughness.
– Very low elongation (3% – 5%).
– Excellent flex fatigue resistance.
– Low resistance to heat.
– High creep.
– Creep ratio can be calculated given the application.