Re: [VFB] Scrounged Stuff for Fly Tying

[Henk Verhaar]

On 15 Nov, 2006, at 9:13, Reuven Segal wrote: What is Tyvek? A nonwoven fabric from plastic fibers, used for tear-resistant envelopes as well as for building wrap during construction. It is a DuPont trade name. The fibers are 'standard' polyethylene, bonded by heat. FYI, dyneema, spider wire and the likes are also polyethylene, linearized to massively increase the tensile strength of the fiber (linearization seeks to have the tensile strenght of the macroscopic fiber approach the chemical bond strength of the polymer molecule, by maximizing the intermolecular (vanderWaals) forces). Dyneema has a higher tensile strength than Kevlar, but suffers from inferior heat resistance. It is therefore less well suited for high-friction uses. Henk =============================== ><(((((º> =============================== | Dr. Henk J.M. Verhaar             | e-mail: [EMAIL PROTECTED] | | Ecotoxicoloog en vliegbinder      | tel:    035 656 2128              |  | Stichts End 17                    | mobiel: 06 26 136034              | | NL-1244 PK Ankeveen               | web:    www.xs4all.nl/~flyrod     | =============================== <º)))))>< ===============================