Dolezych

THE PRODUCTS OF FUTURE

KOOKA, Your Runway Toward Success

Tel：+886.2.2999.8888

Email : info@kooka.com.tw

Address : No. 3, Lane 265, Sec., 2, Heping East Road,

Da-an District, Taipei 106101, Taiwan

Tel : +886.2.2700.6299

Fax : +886.2.2700.3662

Email : info@kooka.com.tw

KOOKA Technology Corporation

The DoNova® textile chain characteristics :

up to 85% less weight
patented construction*
multilayered redundant system ensures safety
Certified by Dekra
abrasion and wear-resistant material
electrically non-conductive
floats on water
non-corrosive
reduces the danger of injury
Temperature range from -40 °F (-40°C) to 158°F (70°C)

* Patent-No. WO2013186206

DoNova® PowerLash, Heavy load securement at its best

When used as a lashing chain DoNova® PowerLash challenges the steel chain grade 80 with nominal thickness 13 mm. Certified by Dekra and with a lashing capacity of 10.000 daN even the heaviest loads can be secured easily.

The extreme low weight of DoNova® PowerLash provides for easy handling of heavy duty load securing devices. This enables the handling of longer lashing chains with more than 20 m of usable length even with only one operator.

The flexible textile chain-links can be connected with nearly every high-tensile chain component. In order to shorten the chain a standard high-tensile shackle is sufficient.

This chain is produced in cooperation with DSM and is suitable for heavy use since it is extremely resistant against abrasion, chemicals and seawater.

DoNova® Perfect for lifting delicate loads

When DoNova® is used as a lifting chain - besides the spectacularly easy handling - the protection of the load is in focus.

The soft and flexible webbing chain is suited perfectly to lift delicate loads or to protect sensitive surfaces from damages by the lifting device.

The DoNova® PowerLift is as powerful as a lifting chain grade 80 with 13 mm diameter.

The 25 mm width webbing made of Dyneema® in a single leg DoNova® PowerLift - textile chain sling reaches a carrying capacity of 5000 kg. With a 4-leg chain sling the WLL is 10.500 kg. Low weight and best handling is guaranteed.

For lifting asymmetric loads DoNova®-PowerLift can be easily shortened with high strength shackles.

The DoNova®

The DoNova® textile chain is made of chain links consisting of several layers of high performance webbing made with Dyneema®. That creates unique advantages because DoNova® is strong as high strength steel chain grade but up to 85% lighter.

DoNova® is used where quick and efficient lashing or lifting is required.

Safe working has never been this easy!

And as we rank the security of the working tools first, the textile chain is dekra-certified for variants PowerLash and PowerLift.

High-performance fibers from Dyneema®

Premium in every respect

DSM Dyneema is the inventor and manufacturer of the UHMWPE fiber (Ultra High Molecular Weight PolyEthylene), which is marketed under the brand name Dyneema®, the world's strongest fiber™.

Dyneema® offers maximum strength combined with minimum weight. For the same weight it is 15 times stronger than quality steel and up to 40% stronger than aramid fibers. The Dyneema®fiber floats on water and has an extremely high resistance to abrasion and cutting as well as being resistant to moisture, UV light and chemicals.

Products made from Dyneema® fibers are used in many different sectors where highest performance and reliability count.

Dyneema® fibers are used for example in Aviation, Maritime and Offshore-Sector, Commercial fishing, for the production wear-resistant textiles like gloves and in the heavy lifting sector.

FAQ – Dyneema® fiber

1. What is Dyneema®?

Dyneema® is the brand name for a high-strength UHMWPE fiber from the Dutch company DSM. Dolezych uses the fibers for round slings (yarn and round sling hoses) and webbing (lashing straps + textile chain). The fiber types SK 38, SK 75, SK 78 and DM 20 are used. These fiber types essentially differ in their tensile strength.

2. How tear-resistant are webbing made from Dyneema® fibers?

At the same weight, straps made from Dyneema® fibers are three to five times more tear-resistant than straps made from polyester, polyamide or polypropylene fibers. Or to put it the other way around: belts made of Dyneema® fibers are more than three times lighter than belts made of the three fiber materials mentioned with the same tear resistance.

3. Stretching

Dyneema® fibers have a low elongation at break of only 3.5%, i.e. similar to steel wire (2%). On the other hand show polyester fibers (10%), polypropylene fibers(10%) and polyamide fibers (20%) have much higher elongations at break and thus a highly elastic behavior under tensile stress. Corresponding belts made of Dyneema® fibers also show a very low elongation at break of only 4%, similar to a steel cable and thus respond to tensile loads much more directly.

Since the linear elongation of Dyneema® lashing straps is a linear function of the tensile load, at 50% of the breaking stress (SF = 2) the elongation is only 2% (4% x 0.5). At 33% breaking load (SF = 3) it is only 1.32% (4% x 0.33). Example: A three meter long Dyneema® belt only stretches by around 3.96 cm under this load; A belt made of polyamide fibers stretches by around 60 cm and one made of polyester by around 30 cm.

4. Abrasion resistances

Belts made from Dyneema® fibers are also used where the highest abrasion resistance is required, such as in nets for air transport or for helicopter nets. They are also used as harnesses in Formula 1, in equipment for rocky high mountain sports and in synthetic link chains. Depending on the industry standard, belts made of Dyneema® fibers are certified according to a wide range of abrasion tests, for example according to the EN standard using the Martindale method.

Generally speaking, belts made from Dyneema® fibers are up to a hundred times more abrasion resistant than belts made from aramid fibers. They are up to thirty times higher than belts made of polyamide and up to ten times higher than belts made of polyester. In addition to the high yarn strength, the low coefficient of friction of Dyneema® fibers (0.05) contributes to the "self-lubricating behavior" and thus to excellent abrasion resistance.

5. Bending and tension fatigue

Depending on the fiber type, belts made of Dyneema® fibers can be bent +/- 180 degrees more than ten thousand to one hundred thousand times without showing significant fatigue failure. This means that the bending fatigue of Dyneema® is up to a thousand times lower than that of other fibers, which tire and break quickly when bent frequently.

6. Temperature range

Tension-free belts made of Dyneema® fiber can be used between -273°C and +70°C. As the temperature drops far below zero, their tear strength increases significantly by another 30%. Even under cryogenic (extremely low temperatures) conditions, belts made of Dyneema® do not become brittle, in contrast to steel. They remain soft and flexible. Belts under pretension can be used briefly up to +100°C.

7. Melting point

Dyneema® fiber is made from crystalline ultra high molecular weight polyethylene (UHMWPE). At 152° C, its melting point is far above that of, for example, high density PE (135° C) and low density PE (120° C).

8. Flame retardancy and fire safety Dyneema® fiber belts are relatively difficult to ignite. When the energy supply is removed, they go out by themselves. Other measures, such as suitable equipment or sheathing, can further increase fire safety. Applications made from Dyneema® fiber have successfully passed the statutory flame retardant tests for use in e.g. aerospace, military equipment and Formula 1 racing cars.

9. Cut resistance

Dyneema® fibers are up to five times more cut-resistant than polyester fibers. In processing, Dyneema® fibers are therefore preferably cut cleanly with micro-serrated titanium scissors or with electrically heated knives. Dyneema® fibers are widely used in cut-resistant protective work clothing (e.g. gloves for glaziers and butchers, chainsaw trousers, nail-proof shoe soles).

Depending on the textile construction, fiber type and industry standard, cut-resistant clothing made from Dyneema® fibers achieve the highest cut protection classes 3, 4 and 5, just like steel wire and glass fibres. In practice, webbing made of Dyneema® fiber has proven to be quite resistant to cuts and requires great force and suitable cutting tools to cut through. Cut protection sleeves made of Dyneema® fibers (woven, knitted, warp-knitted) are therefore becoming increasingly popular when it comes to safe edge protection and vandalism protection for ropes and belts.

10. What colors are Dyneema® webbings available in?

Dyneema® fibers can be solution dyed. Commercially, Dyneema® Purity™ is available in blue and yellow for surgical use. Dyneema® Black™ is available as a black yarn for industrial applications. Most Dyneema® yarns are offered undyed in opaque white. Re-dyeing of Dyneema® yarns usually produces rather dull colors. Some twisting mills offer post-coated Dyneema® yarns that can be ordered in different colors and adhesion qualities. Belts made of Dyneema® fiber are offered by the weaving mills with different finishes and colors.

11. What does "creep" mean for Dyneema® fibers and how do the individual fiber types differ?

In contrast to length-reversible tensile elongation, creep in fibers is understood as the permanent linear change in length. This is caused by permanent high tensile stress. This is accompanied by a reduction in the titre (yarn count). All materials will creep under permanent loading if the 3T criteria are met: the temperature Ƭ must be high enough, the linear stress T (tension) must be high enough and the time t must be long enough.

Think of church windows thickened at the bottom (high: t, T) or the drawing of thin wire from glowing thick blanks in the rolling mill (high: T, Ƭ). Compared to SK75, one of the "longest-serving" Dyneema® fibers, the newer SK78 fiber creeps three times less under continuous load. In other words: In order to achieve the same change in length, three times the tensile stress T must be applied with SK78 or three times the time t can be invested. Below Ƭ< 10° C, no measurable creep occurs with any Dyneema® fiber type. The new fiber type DM20 creeps ten times less than SK78 and is therefore qualified as creep-free for most applications.

12. Chemical resistance

Polyethylenes in general, UHMWPE in particular and therefore Dyneema® fibers as such are extremely resistant to most chemicals. Dyneema® fibers resist strong acids and bases. Aggressive hydraulic oils, seawater and solvents can hardly harm it. Polyester fibers, on the other hand, are not e.g. resistant to alkalis and show significantly higher chemical reactivity. Only aggressive oxidants such as ozone, pure oxygen, strong UV radiation or permanganate damage Dyneema® fibers. We will be happy to send you further information on request.

13. Lightfastness and UV resistance

Dyneema® fibers and polyester fibers are comparable in this respect and thus significantly surpass all other synthetic fibers in terms of their lightfastness and UV resistance. The following applies: the thicker a belt, the more UV-resistant it is, since the penetration depth of UV radiation and thus damage is limited to ten microns ("skin core protection"). The shielding can be further increased by UV-spin-stabilized fiber variants as well as by equipping and coating the belt.

14. Toxicology and Life Cycle Assessment

Through environmentally friendly and energy-efficient production, such as consistently using green electricity, Dyneema® fibers can achieve a better ecological balance than steel. In principle, Dyneema® fibers can also be polymerized and spun from ethene gas obtained biologically or from thermal recycling of PE. UHMWPE and Dyneema® fiber are bio-inert. They are used permanently and safely in the human body, for example as hip joints, surgical threads or as certified hygienic protective and work clothing in the food industry.

Dolezych – your partner for secure lifting and transport

The name Dolezych has stood for competence and performance for more than 85 years. Products and services that meet the most exacting demands for quality make Dolezych one of the first ports of call for cables, lifting, slinging and load-fastening equipment. Modern technology and continuing innovation have made the company into one of Europe’s biggest suppliers.

Nowadays about 650 employees work at the headquarters in Dortmund and at seven subsidiary companies abroad:

In the factory, on the building site, on road, rail, sea and air – the 20,000 and more items produced by Dolezych are used wherever loads have to be lifted, transported or secured. The enormous variety is a reflection of customers’ needs: in addition to universally applicable equipment, real life is always full of special cases.

The company therefore aims to provide a full spectrum of products, and to develop new ones whenever customers need them. On top of this, Dolezych offers a comprehensive package of services, including consultation, inspection, servicing and repair for all lifting, slinging and load-securing gear, an online shop and a 24-hour delivery service for stock articles across Germany. In order to promote understanding of lifting and load-securing technology, Dolezych has provided specialist seminars and training courses for more than 20 years.

DoRapid Patented Side Loading Ratched Straps by Dolezych

Lashing strap with side loading

DoRapid-Zurrgurt Faster lashing saves time: Frequent loading and unloading operations often mean to the driver time-consuming feeding the webbing into the ratchet, tightening, loosening, unloading and possibly removing the webbing from the ratchet. With the new Doleco USA Ratchet you are saving valuable time when lashing:

The strap is inserted through a side gate directly into the spool, which eliminates the time-consuming threading process of webbing into the ratchet。

Advantages of the DoRapid ratchet:

Up to 40% faster lashing!
Simplified Handling
For 50 mm webbing
STF up to 300 daN