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Dyneema® provides strength, robustness and waterproofing, without compromising on lightness. From the outset, Samaya has worked closely with Dyneema®. The know-how of Samaya combined with the performance of Dyneema® fibers enable us to design equipment that combines strength, lightness, waterproofing and durability.
Dyneema® combines the properties of flexibility, waterproofing, mechanical resistance to puncture and tearing, and non-degradation of the material in contact with chemical inputs or UV rays, without compromising on lightness. For the same mass, Dyneema® is 15 times stronger than steel, and light enough to float on water. Samaya has chosen these fibers for a wide range of applications, and has exclusive rights to certain technologies.
Dyneema® filaments are made from ultra-high-molecular-weight polyethylene, i.e. very long, linear molecules containing over 500,000 atoms. The molecules are linked to each other at each atom. They are very strongly bonded thanks to their length, making it an extremely strong polymer and fiber, with Dyneema® being 40% stronger than aramid (like Kevlar) and 5x stronger than polyester at equivalent weight (tenacity g/den).
Samaya has chosen to use a biosourced version of Dyneema® fiber, offering identical performance while reducing its carbon footprint by 90%. In this version, the ethylene used to produce polyethylene is extracted from wood pulp. The extracted polyethylene is mixed with a solvent to form a gel. A spinning process transforms this mixture into Dyneema® monofilaments. The monofilaments obtained are 2 denier, i.e. 9 kilometers of Dyneema® filaments weigh 2 grams.
For a selection of tents in the ULTRA range, Samaya has selected an exclusive composite...
For the body of ULTRA range bags, Samaya has selected Dyneema® Composite Fabric (DCF) laminated with woven polyester. Thanks to its abrasion-resistant properties, the polyester acts as a protective layer for the DCF, preserving its mechanical strength and waterproofing properties and maintaining the DCF's repairability. This hybrid combination, known as DCF H, offers mechanical strength, waterproofing and abrasion resistance.
For the body of ULTRA range bags, Samaya has selected Dyneema® Composite Fabric (DCF) laminated with woven polyester. Thanks to its abrasion-resistant properties, the polyester acts as a protective layer for the DCF, preserving its mechanical strength and waterproofing properties and maintaining the DCF's repairability. This hybrid combination, known as DCF H, offers mechanical strength, waterproofing and abrasion resistance.
Dyneema® filaments can be used in a variety of processes to produce different materials such as yarns and composites. They can also be woven into ropes or fabrics.
To make a Dyneema® yarn, several filaments are interlaced. These yarns can then be woven into a fabric, combined with other yarns to obtain other properties, or braided into ropes or cords. The resulting yarns are lightweight yet highly resistant.
Some of the webbing selected by Samaya is also made of Dyneema®, as are the cords used for Guylines tents, to provide lightness, rigidity and mechanical strength.
The filaments are stacked parallel and perpendicular to each other, without being interwoven, unlike conventional fabric. This method forms the core of Dyneema® Composite Fabric (DCF).
Once the stack has been obtained, it is encapsulated by other components providing additional properties. This complex step is carried out by low-temperature lamination. It enables different layers of material to be bonded together, combining their properties to form flexible, resistant and lightweight materials.
For tent floors, Mylar films are laminated on either side of Dyneema® filaments. These films provide abrasion resistance and waterproofing, while the Dyneema® filaments offer tensile strength. The combination of these materials results in superior puncture and tear resistance properties. In the case of ULTRA range walls, technical features go even further: breathability and air permeability properties are added.
At equivalent mass and compared to a 30D High Tenacity Nylon fabric coated with Polyurethane and Silicone, a DCF is :
- 2 times more tensile strength[1],
- 5 times more tear-resistant[2],
- 10 times more waterproof[3].
These materials can also be easily repaired using a variety of techniques (including cold-pressure patching), thereby extending the service life of Samaya equipment.
[1] According to ISO standard 13934-1
[2] According to ISO standard 13937-2
[3] According to ISO 811
Some of the webbing selected by Samaya is also made of Dyneema®, as are the cords used for Guylines tents, to provide lightness, rigidity and mechanical strength.
Weaving involves the perpendicular interweaving of two sets of threads, called warp and weft threads. The use of Dyneema® yarns to weave a fabric provides an unrivalled weight-to-strength ratio.
