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For sale

 

Specially produced top-of-the-bill djembé- and dunun cord.

Cord 4 mm.

Outside jacket:  Red-black braided high tensile strength low stretch polyester (NO high stretch polypropylene used!).

Core: Aramide 2000 superstrong no-stretch fiber.

Extremely souple and rapid to use. No stretch because of the Aramide 2000 fiber in the core.

Aramide is one of the modern superstrong fibers like Kevlar, Vectran, Dyneema and Twaron. Aramide only can be cut with a very sharp knife. It cannot be melted.

Attention: The end of the cord can be finished by melting the outside polyester jacket and then rolling the melted material between a wetted thumb and index.

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The very thin white cord below the red black cord already withstands 125 kg before breaking. It could tension a djembé on itself ! The red-black cord that we sell (see picture) contains three times this quantity of superstrong and stretchless fibers. To this strength you may add the jacket of low stretch polyester (no high stretch polypropylene is used which is much cheaper and may look the same as polyester) ! Our cord was specially developed to fit on or repair traditional African drums in a professional way !

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How to order ?

Price: € 0,95 per meter.

Shops/ manufacturers: Rolls 250 or 500 meter: Ask for special price.

Costs for package and shipment:

Within the Netherlands up to 10 kg: € 6,50.

Rest Europa until 2 kg: € 12,50

Outside Europe until 2 kg: € 21,00

Complete roll 500 m (>10 kg): Netherlands € 12,50

Complete roll 500 m (>10 kg): Europe (most countries) between € 28,75 and € 39,25 (ask for more details).

Other countries /continents complete roll: € 99,95   

Payments within the Euro zone can be done at zero (or very low) cost by using a special form to be obtained from your own bank. Our invoice will show the necessary data as 1. bank account number, 2. BIC number and 3. IBAN number.

Another option for payment is the Paypal payment system. See www.paypal.com for more info in most used languages. The paypal system uses our email address gerardpvandijk@gmail.com as account "number". Do not pay Paypal straight from a credit card but order your bank to pay the amount of money due to Paypal to the email address gerardpvandijk@gmail.com  Then we will get a confirmation that Paypal received this money and we will be able to transfer this money to a 'normal' bank account number.

Order by phone: Gerard van Dijk +31481434195

or E-mail: gerardpvandijk@gmail.com 

 

General info on cord materials:

Materials

Cord can be manufactured in many different ways and with many different fabrics and combinations between these. Common fabrics are:

  • Nylon (polyamide)
  • Polypropylene
  • Polyester
  • Dyneema
  • Spectra
  • Aramide (Kevlar, Twaron)
  • Vectran
  • PBO (Zylon)

A nylon cord stretches a lot before breaking. UV light will harden the nylon.

Polypropylene stretches even more than nylon. It is cheap but the quality is corresponding because it features also a lot of wear. The cord floats on water.

A Polyester cord is more expensive, but resists wear good. It stretches a lot less than nylon or polypropylene.

For low stretch applications the cord can be pre-stretched. For more serious applications a core of dyneema, aramide, spectra, vectran or PBO can be used. By using polyester as the sheath protecting the core against wear and UV light a perfect no-stretch combination is obtained. During production special attention has to be paid to making a very tight sheath.

Dyneema is similar to Spectra. Can be melted easily, floats on water and has extremely low stretch. It was invented by DSM (Dutch State Mines), while Spectra is manufactured by Honeywell.

Aramide (also known under the name Kevlar (Trade mark of Dupont) and Twaron (Teijin company formerly the Dutch AKZO). Aramide shows very low stretch and a high breaking force. Fibres do not melt.

Vectran has the same (yellowish) colour as aramide, but has a still higher breaking force

PBO is the most modern fibre in this line-up. Very low stretch, no creep (stretch at long term). Very sensitive for UV light ! Already under a TL light it lost 50% of strength in 24 hours. So the line should never be used without an outer jacket of polyester.

 

Core:

polyester

dyneema

aramide

vectran

PBO

stretch (% at breakage)

12%

3,5%

3,7%

3,3%

2,5%

creep

much

much

little

little

almost none

UV-resistance

very good

good

bad

bad

very bad

spec. weight

1,38

0,98

1,41

1,41

1,25

breaking force of an 8 mm cord

1448 kg

3265 kg

 *

2840 kg

4743 kg

breaking force of a 10 mm cord

2290 kg

4735 kg

 *

4400 kg

6946 kg

breaking force of a 12 mm cord

3078 kg

6615 kg

 *

6372 kg

9773 kg

melting point

250°C

150°C

550°C

330°C

650°C

Attention: Numbers are purely for indication.

* No data available but comparable to vectran and dyneema.

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Go to the Service page for more information on how to maintain and repair a djembé or dun-dun ! (French, english and dutch)

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