Developed in conjunction with leading materials specialists, our Gpact gel has seen use in products as diverse as baseball mitts, skateboarder shoes and mechanics' gloves.
Sharp impact (the bang as a hammer hits a nail) and excessive contact stress (using a wrench all day) can cause soreness, tingling and “cold” nerve pain from the fingers to the shoulder joint. Gpact gel material sewn into our gloves dramatically reduces impact forces.
An innovation in shock/impact protection, Gpact dramatically reduces impact forces reaching the hands. Independent lab testing by Ingemansson Technology AB – leading European consultants in acoustics, noise and vibration – verifies the superior performance of this versatile material.
The charts below show the testing of three materials for effectiveness in shock/impact protection. Chart 1 reveals the superior force-reducing capabilities of Gpact when “excited” by a sharp blow, such as in hammer use. With only 45% of the impact force reaching the hands, the worker can feel the effect of using a Gpact glove liner. The difference that workers do not feel is demonstrated in Chart 2, where Gpact dramatically reduces the transmissibility of forces at higher frequencies. These frequencies are experienced as the tool and its handle resonate after each impact. Post-impact “hidden” frequencies can actually cause more damage to the hand/arm system than the initial impact itself. What this means to workers using impact-type tools on a daily basis is superior protection from injury in a variety of applications.
In contact-stress applications, Gpact offers a new level of comfort for personnel facing extended periods of surface contact, such as keyboard users (base of the palm), warehouse workers and glass or lumber handlers. Our GripStrip tool wraps add Gpact protection on the tool itself, with the added benefit of a sure-grip surface for better tool control and less fatigue from over-gripping.
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In response to requests from our extreme sport shoe clients, we’ve developed a dilatant gel material, Gpact II™, that “gives” comfortably and compresses slightly under low stress, but becomes firmer, tighter, and more supportive at the moment of high impact. This effect is known as shear thickening, where the material’s viscosity increases as shear forces increase.
Dilatants are based on particles surrounded by liquid (in this case a gel). Under slow movement or low shear forces, the liquid moves easily around the particles as the material is distorted. But under higher-energy shear forces, such as an impact, the liquid cannot move quickly enough around the particles and friction is increased. The faster the shear or impact, the greater the friction and thus higher viscosity.
This polyester-based gel is more environmentally-friendly than PVC-based materials.
A major benefit of utilizing a dilatant material in shoes is a reduced need for multiple material layers, i.e. separate EVA foam and gel pads. In many shoes, foam midsole components are used to cushion heel strikes during normal wear, such as walking. In sports activities, impacts from jumping and sudden stops/turns can expose the feet to loading as high as 17-18 times the athlete’s body weight. Foam pads simply do not hold up well to these extreme forces.
Dilatant Gpact II offers cushioning during normal wear by remaining soft and highly pliable. When high-impact forces are applied, though, the dilatant material very rapidly stiffens, preventing bottom-out and spreading the impact forces over a larger area.
For athletes, nothing beats the ability to “feel” the surface and assess the connection with regards to traction or lack thereof. Having a thinner, single layer of material in the midsole brings the feet much more tactile feel, providing more control and better performance for the athlete.
Watch a demo: Here
Hand-Arm Vibration Syndrome (HAVS) affects millions of workers worldwide who use electric, gas and pneumatic power tools or stationary tools that transmit vibration to the worker’s hands. Long-haul drivers, heavy equipment operators or persons driving various utility vehicles also risk developing these disorders.
These workers are found in virtually every industrial classification but especially in manufacturing, mining and construction. As the use of vibrating equipment has increased over the years, so has the incidence of various HAVS disorders. Vibration exposure can result in circulatory and nerve damage that is painful and permanent. The development of HAVS may be gradual or a person may begin to feel tingling or numbness of the fingers within a few weeks.
For most HAVS disorders, there is no medical cure. It is obvious, therefore, that protecting workers and removing hazards is critical.
Wearing gloves to protect from vibration would seem to be an obvious solution, but simple fabric or leather gloves have basically no effect on vibration exposure. When sponge or foam materials are incorporated into gloves, they are inefficient at damping vibration. Visco-elastic materials perform better, but are still shown to be relatively inefficient, in some cases even amplifying vibration through human resonance. Hundreds of items are erroneously or deceptively labeled “anti-vibration”, but without testing and certification, those claims of reducing vibration are shaky at best.
Believing that a material could be developed to meet the testing standards applied to vibration reduction materials, Chase Ergo, Inc. worked for more than two years with researchers in the United States and Scandinavia to develop what has become Gfom.
This multi-part vibration-reducing pad was tested extensively in an independent European testing lab, enabling it to be CE-certified for its unique ability to reduce harmful vibration frequencies to levels specified in the ISO (International Organization for Standardization) vibration-glove testing standard.
The ISO standard has been approved and adopted by both the American National Standards Institute (ANSI) and the ASA (Acoustical Society of America) and as of 2007, is now numbered ANSI S2.73-2002 / ISO 10819: 1996 (R2007). This certification requires that material contained in a glove labeled "anti-vibration" must reduce vibration in the middle (31.5 - 200 Hz) and high frequency (200 - 1250 Hz) ranges produced by many power tools. The ISO/ANSI standard details the testing methods to be used, and the results that must be achieved by a glove claiming anti-vibration properties.
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