anyone know of dyneema lines?

[bendover 0]

Katan came with dyneema lines instead of the spectra, I am unfamiliar with these lines, anyone care to give me some insight.

Thank You

Ben

[ORANGENBLUE 0]

are you positive that they are dyneema? Dyneema is more commonly found on paragliders and tend not to hold up to loads of opening shock.

[skydiverek 63]

I always thought Dyneema = Spectra = Microline.

[bendover 0]

The tag that came with it from para gear said 650 dyneema for the lines.

[bendover 0]

If spectra is dyneema thats fine I just am uneducated on this subject and would love to be learned.

Thanks for any input anyone can give.

[ORANGENBLUE 0]

dyneema is a sheethed nylon line. the second picture shows what can happen when large shock is applied.

[pchapman 279]

Dyneema and Spectra are basically the same thing chemically, developed and produced by different companies. They're both in the category of Ultra High Molecular Weight Polyethylenes (UHMWPE) or High Density Polyethylenes (HDPE).

While the basic molecules may be the same, the fibres and woven or unwoven lines that are created from them will vary in characteristics.

[bendover 0]

so is this a safe thing? like spectra?

[jakee 1,489]

Quote

so is this a safe thing? like spectra?

Quote

Dyneema was invented by DSM in 1979. It has been in commercial production since 1990 at a plant in Heerlen, the Netherlands. Honeywell developed a chemically identical product, which is sold under the brand name Spectra. Though the production details are somewhat different, the resulting materials are comparable in properties.

From Wikipedia.

Do you want to have an ideagasm?

[cobaltdan 0]

DSM (a dutch company) is the inventor of fiber produced from Ultra High Molecular Weight Polyethelyene (UHMWPE).

They licensed the process to Honeywell in the united states which produces UHMWPE fiber under the trademark Spectra, in Europe DSM manufactures UHMWPE under the trademark Dyneema.

There are various grades of UHMWPE, with very slightly varying strengths. But basically Spectra and Dyneema are the EXACT same thing.

In fact manufacturers use like grades interchangable when braiding into lines. So you may have already been jumping dyneema lines, being told it was spectra...

note: Honeywell is slowly divesting in the u.s. market and DSM recently invested $5 Billion for a fiber line in the Carolinas (this was to probably get around the berry amendment and supply the u.s. military. dyneema and not kevlar is becoming the primary ballistic yarn used in the world). so in a few years we will probably see a post from someone asking what are spectra lines and why arent they dyneema?

-

Daniel Preston <><>
atairaerodynamics.com (sport)
atairaerospace.com (military)

[sysop 0]

I have test speedflying wing with dyneema lineset. Not good. Very soft than standart spectra-500, but have specification for 300 kg. but XMA soft too, but more think.

www.speedflying.ru
Mountian Fly School

[jakee 1,489]

Quote

I have test speedflying wing with dyneema lineset. Not good. Very soft than standart spectra-500, but have specification for 300 kg. but XMA soft too, but more think.

What exactly do you mean by soft?

Do you want to have an ideagasm?