What is the difference between Spectra and Dyneema?
Not very much. Both products are HMPE (high modulus polyethlene) materials. This product was originally developed by DSM in Europe and licensed to Allied Chemicals for production in the United States. BCY introducted Dyneema to the archery market in 1995 with its DynaFLIGHT bowstring material which was made from SK65 Dyneema. In 1997, DSM began manufacturing SK75, a higher strength Dyneema with less creep, and BCY introduced this with DynaFLIGHT 97 bowstring material in 1997. There are some slight differences in the two products, Spectra and Dyneema, which really do not effect the performance as an archery bowstring. These would be the number of filaments and the actual makeup of the yarn. In general, SK65 Dyneema is equal to Spectra 1000 and SK75 Dyneema equals Spectra 2000. Note that Spectra 2000 is not available in heavy deniers needed for making archery bowstring material. The main benefits of Spectra and Dyneema over other fibers previously used in archery bowstrings are their ext
