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CUSTOM SHOCK CORDS, STRAPS AND NETS

SANDOW THE GUIDE

What is a bungee cord?

Abungee cordis anelastic cordmade of:

a rubber (latex) core or a multi-filament polymer,
a braided or knitted sheath made of polyamide, polyester, polyethylene, polypropylene, aramid, and other technical fibers.
with a fitting (hook, loop, eyelet, crimp tube, etc.) at each end.

The elastic cord meets a wide range of mechanical specifications (tensile strength, elongation, flame resistance, abrasion resistance, etc.) in accordance with the customer’s specifications.

The origin of the word:

Eugen Sandow, whose real name was Friedrich Wilhelm Mueller (1867–1925), was a German athlete who is considered the first well-known bodybuilder; he performed in exhibitions and films around the world in the early 20th century

He is widely regarded as the father of modern bodybuilding.

For his workouts, Sandow used equipment featuring elastic rubber bands, which were later adapted for many other uses. Over time, “SANDOW” has become a common noun in the French language.

The bungee cord can also be referred to as a“tensioncord,”“elastic cord,” or“stretcher.”

What are the differences between a strap and a net?

Theflatwebbingorropeis woven in a range of widths (8 mm to 120 mm). It is available in elastic or rigid versions, high-strength, made of aramid (Kevlar, etc.), rot-proof, resistant to hydrocarbons and abrasion, flame-retardant, self-tearing, or meeting other technical requirements. Thewebbingcan be supplied on a spool or fitted with metal, plastic, or overmolded end fittings according to the customer’s specifications. The seams can be high-strength and self-tearing to address issues related to absorbing violent impacts.

Thenet is custom-made, reinforced, fire-resistant, certified, and available in a variety of lengths, widths, and mesh sizes. It is manufactured according to customers’ technical specifications, such as cargo nets, stop nets, and safety nets.

What are the components of a bungee cord?

A bungee cord consists of a core:

made of natural latex,
any other extruded polymer.

And abraidedcottoncord:

polyamide,
polyester,
polyethylene,
polypropylene,
Kevlar,
aramid,
fiberglass,
Technora.

Depending on the desired mechanical properties of the bungee cord.

What is bungee cord braiding (or weaving)?

Braiding is the technique used to manufacture theprotective sheath of an elastic cord. The braiding process involves covering a multi-strand core made of natural latex, synthetic rubber, various polymers, etc., with textile yarn through the precise rotation of spools. This is a crucial step in determining the mechanical properties of the elastic cord and in customizing it (colors and patterns).

Thebraiding wiremay consist of:

cotton,
polyamide,
polyester,
polyethylene,
polypropylene,
Kevlar,
aramid,
fiberglass,
Technora.

Each elastic cord or shock cord can be braided in a single or double layer.

Check out our selection of bungee cords

Is it possible to customize the braiding?

Colors: A wide range of standard colors is available for all yarn grades.
Custom colors can also be produced using dye baths based on the Pantone color reference system.

Patterns: zebra, jacquard, rounded… featuring color markers, squares, solid lines, and waves. Any type of pattern can be considered upon request.

What are the different treatments available for bungee cords?

There are various treatments that can be applied to bungee cords, including:

heat resistance and flame retardancy,
waterproofing,
flame retardancy, IR reflectivity,
waterproofing,
the rot-proof treatment,
abrasion resistance,
dyeing,
printing,
sublimation.

REQUEST YOUR TREATMENT DIRECTLY THROUGH OUR CONTACT FORM

Specific treatments may be available depending on individual needs.

What are the different ways to set up and assemble the bungee cord?

Crimping,binding, and overmolding can be performed usingsteelor plastichooks, terminals, and ferrules. This process is used to produce finished products such as bungee cords, straps, and even nets.

Any assembly made using ELASTIC, STRAP, or NET with:

hooks,
loops,
carabiners,
pods,
stainless steel tubes,
rings
shackles,
chains and other fittings.

Elastic cords, straps, and nets can be made of plastic, galvanized steel, brass, or stainless steel.

For all diameters ranging from 1 mm to 40 mm,overmoldingis available for certain parts.

What are the unique features of bungee cords?

The mechanical properties ofthe elastic cablewill be optimized to meet the established specifications: force, elongation, stiffness, strength, frequency absorption, and return capacity (hysteresis).

The specific characteristics are adjusted according to the desired properties:

flexibility and elongation of over 300%,
resistance: load, hydrocarbons, abrasion, friction, and environmental conditions
environmental factors: temperature, saltwater, chemicals…
temperature changes: cold or heat,
fire-resistant or self-extinguishing,
vibration damping and frequency absorption,
conductivity,
self-locking.

Fire-resistant and capable of withstanding extreme conditions and deformation, SANDOW can be the ideal solution for a specific need, ensuring the linearity, repeatability, and long-term durability of products.

For every need and every challenge, a custom solution.
Once all technical specifications have been identified in collaboration with the purchasing department or the R&D department, the bungee cord is designed, tested, and developed.

Contact our engineering department

What are the main applications?

There are many applications; here is a list of potential uses:

fastening,
suspension,
propulsion,
depreciation,
securing,
mooring,
shock absorption or impact absorption,
load reminder,
frequency absorption.

Other specific applications are subject to confidentiality agreements with our clients. Therefore, if you would like to learn more about your application, please contact our team directly.

REQUEST AN APPOINTMENT THROUGH OUR CONTACT FORM SO WE CAN DISCUSS YOUR USE CASES WITH OUR TEAM

Elastic cords, straps, or nets are highly effective tools for:

mechanical safety,
vibration tests,
crash test,
ejection,
motorization,
mobility assistance,
load reminder,
interior equipment,
pre-tension,
stop at a certain load,
environmental issues.

More examples of applications are available here:Applications and uses of technical bungee cords.

How do you choose the right bungee cord?

The right bungee cord for every application!
Depending on the intended use and the required mechanical properties,choosing the right bungee cordis crucial.
Resistant to a specific load, abrasion-resistant, with high elongation (+300%), and capable of withstanding temperatures from -60°C to +200°C, or even flame-retardant, as well as conductive or suitable for marine and chemical environments, and finally meeting customer certification requirements such as FAR 25.853, MVSS 302, ADB 0031… SANDOW TECHNIC offers awide range of bungee cordsand technical solutions.

Following a study conducted over a period of more than two years,SANDOW TECHNIChas mastered the dynamic stiffness of rubber bands (stiffness), regardless of their diameter and damping coefficient at a given frequency, enabling the company to provide precise solutions to a wide range of suspension, modal analysis, and vibration challenges that are becoming increasingly sophisticated and demanding.

Our engineering department is available to work with you to develop a technical solution tailored to your needs.

What services does SANDOW TECHNIC offer?

Sandow Technic Company

Founded in 1963, SANDOW TECHNIC became a leader in the automotive (with SANDOW AUTO) and marine (YACHT line) markets. Later, the “bungee cord” product was adapted for industrial applications. Over the course of more than 50 years, SANDOW has thus become a benchmark in the industry. Our collaboration with companies in sectors such as aerospace, automotive, sports, civil and military aviation, defense, general mechanics, industry, maritime works, and the navy, has given us genuine market expertise and established us asa leading specialistinelastic cable,professional webbing, and industrial netting.

SANDOW TECHNIC is ISO 9001 certified and has been EN 9100 certified since 2020

ADVICE AND SUPPORT

Our engineering department is available to work with you to develop a technical solution tailored to your needs. From design and prototyping to mass production, SANDOW TECHNIC supports you through every stage of your project.

FROM WEAVING SERVICES TO CUSTOM SOLUTIONS

Through the custom development of new products and comprehensive solutions,
a product line tested and certified according to the customer's CDC standards,
specialized fabric treatments to enhance their resistance to heat and fire (flame retardancy), water (waterproofing, water-repellency, or other rot-resistant treatments), and infrared reflectivity, as well as offering dyeing, printing, sublimation, jacquard weaving, and any other custom personalization options.
Finally, expertise in braiding, weaving, and high-strength, self-tearing seams for shock absorption applications.

A PROVEN AND RECOGNIZED QUALITY SERVICE

All of our technical products—including nets, straps, andbungee cords—are tested after manufacturing. Each component can also be inspected after assembly.
A controlled manufacturing process with batch identification and monitoring of shop floor performance.
Effective quality process: inspections, FDD, FDF / Control and management of traceability documents: FAI.
Traceability and monitoring of our suppliers: certificates of materials, origin, and methods.
Traceability of our products for 20 years.
Tried-and-tested products: breakage testing, temperature testing.

CONTINUOUS INNOVATION

Collaboration with an engineering firm and laboratory on the dynamic characterization of our product lines.

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Collaboration with companies in the materials and extrusion industries, such as Saint-Gobain, on the development of a new polymer that is even more durable while maintaining the mechanical properties of latex.

Certification from CETIM in the automation and robotization of industrial processes and the workshop’s unique expertise.

What product lines does SANDOW TECHNIC offer?

Diameter: 1 mm to 40 mm.
Available in rolls or pre-assembled with end caps.
Any length within the limits of the roll: 500 meters or more if spliced.

SANDOWS STANDARDS

Elasticcords made from standard-gradeelastic cables—ranging in diameter from 1 to 32 mm and offering 100% elongation—are available in various materials: cotton, polyamide, polyester, polyethylene, and polypropylene.

EXPLORE THE AVAILABLE SANDOW STANDARDS

SANDOW AVIA

is a line oftechnical elastic cablesthat comply with the ASNA0243 aerospace industry standard. Their strength is guaranteed based on their diameter and elongation (= 100%). Diameters range from 4 mm to 40 mm, with a tensile strength ranging from 1 to 700 daN.

Guaranteed linearity, repeatability, and long-term stability
Compliance with B.S. (British Standards) and U.S. Mil-Spec standards.

EXPLORE THE AVAILABLE AVIA ELASTICS

Custom-made SANDOW TECHNIQUE

A wide range of products custom-designed to meet the customer's technical specifications.

EXTRA-FLEXIBLE SANDOWwith high elongation of up to 300%, or designed to withstand specific forces and meet specific environmental requirements (temperature, seawater, chemicals, fire, etc.).

CONDUCTIVE ELASTIC CORD: A braided elastic cord reinforced with a wire that provides electrical conductivity while maintaining the product’s mechanical properties and elasticity.

Elastic cords resistant to extreme temperature fluctuations(-60° to +220°) or to friction and abrasion, made of aramid fibers (Kevlar, Kermel, Vectran, Technora, etc.)
A range of certified elastic cordsthat ensure frequency absorption.

SANDOW NON-FLAMMABLE, certified in accordance with the specific requirements of aerospace, automotive, rail, and industrial standards.

FAR 25.853 Certification
MVSS302 Certification
ADB0031 Certification

EXPLORE CUSTOMIZED SOLUTIONS

SANDOW TECHNIC is certified:

And since 2020, EN9100
ISO 9001

What are the storage conditions?

Under normal temperature and pressure conditions, a bungee cord has the following characteristics:

Storage conditions: Store in a cardboard box away from light and drafts, at a stable room temperature year-round. The maximum storage period is 3 years.

This information is provided for reference only. These figures depend on usage, external factors, wear and tear, fastening systems, etc.