Dyneema an alternative to Kevlar?

ct9a_uae · 02-09-2003, 01:06

According to the company that produces it "Dyneema is a superstrong polyethylene fiber produced using a patented gel spinning process. This remarkable fiber is up to 15 times stronger than steel and, weight-for-weight, is 40% stronger than competing aramid fibers. It has high energy absorption and low elongation. Dyneema floats on water, and is extremely resistant to abrasion, moisture, UV rays and chemicals. As a result, it has an almost unlimited range of applications, providing maximum strength and security for minimum weight".
Does anyone know how much it costs and more importantly if it can be used to make composite parts?

Saint · 02-09-2003, 01:36

not a clue but sounds like it would be great stuff to make brake pads out of and clutches from

what do you rekkon ?

AlexV · 02-09-2003, 11:31

Quote:

Originally posted by ct9a_uae
According to the company that produces it "Dyneema is a superstrong polyethylene fiber produced using a patented gel spinning process. This remarkable fiber is up to 15 times stronger than steel and, weight-for-weight, is 40% stronger than competing aramid fibers. It has high energy absorption and low elongation. Dyneema floats on water, and is extremely resistant to abrasion, moisture, UV rays and chemicals. As a result, it has an almost unlimited range of applications, providing maximum strength and security for minimum weight".
Does anyone know how much it costs and more importantly if it can be used to make composite parts?

Hi,
IIRC Dyneema is already used in composite materials known as S-Glass. It has very similar mechanical carachterstics (and also cost) as carbon fibre. It is generally used where the use of carbon fibre is forbidden (as on some classes of racing yachts for example).

AlexV · 02-09-2003, 11:33

Quote:

Originally posted by Saint
not a clue but sounds like it would be great stuff to make brake pads out of and clutches from

what do you rekkon ?

Nope, opposite to aramidic fibres (e.g. Kevlar) dyneema melts at relatively low temps (a lighter is easily enough to do that).

Simon7extreme · 02-09-2003, 12:46

Dyneema is indeed used in S Glass and is expensive. It isn't as expensive as the best quality CF but if you can use CF, do so.

Dyneema is used for the making of very low stretch ropes used in sailing. Very nice and very expensive. However, there can be problems with heat so in ropes that have high friction they have developed a special carbon fibre rope........at over £200 per metre for a rope only 8 mm thick!!!

02-09-2003, 01:06	#1
ct9a_uae Registered User Join Date: Jan 2003 Location: Dubai, United Arab Emirates Car: Black Evo 7 RS2 Posts: 18	Dyneema an alternative to Kevlar? According to the company that produces it "Dyneema is a superstrong polyethylene fiber produced using a patented gel spinning process. This remarkable fiber is up to 15 times stronger than steel and, weight-for-weight, is 40% stronger than competing aramid fibers. It has high energy absorption and low elongation. Dyneema floats on water, and is extremely resistant to abrasion, moisture, UV rays and chemicals. As a result, it has an almost unlimited range of applications, providing maximum strength and security for minimum weight". Does anyone know how much it costs and more importantly if it can be used to make composite parts?

02-09-2003, 01:36	#2
Saint Registered User Join Date: Feb 2003 Location: Lancing Car: Passat 1.8T Posts: 252	not a clue but sounds like it would be great stuff to make brake pads out of and clutches from what do you rekkon ? __________________ ACT and you shall have dinner! THINK and you will be dinner!

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02-09-2003, 12:46	#5
Simon7extreme Registered User Join Date: Aug 2001 Location: London Car: Ex 7 Extreme Owner, now 964 RS Posts: 4,285	Dyneema is indeed used in S Glass and is expensive. It isn't as expensive as the best quality CF but if you can use CF, do so. Dyneema is used for the making of very low stretch ropes used in sailing. Very nice and very expensive. However, there can be problems with heat so in ropes that have high friction they have developed a special carbon fibre rope........at over £200 per metre for a rope only 8 mm thick!!!