What does EVA stand for?
EVA stands for the synthetic material ethylene-vinyl-acetate and is a highly valuable raw material, which is used in granulate form in the production of nora® products.
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What is the advantage of a composite sheet compared to individual products?
The use of composite sheets is more efficient, because it saves time and money. Two different materials are already bonded together so that no further bonding is necessary. This eliminates the risk of the different materials shifting as they are worked or of bubbles forming at the joint. In addition, there is no hardening due to a bonding layer, and there is greater retention of volume, because no deep drawing is needed.
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How long must the material cool after forming on the last?
For the cooling time the recommended rule of thumb is: activation time x factor 2 = optimal cooling time. Through the use of deep drawing equipment with a cooling system, the cooling process can be accelerated. Note: If the cooling time is too short, formed materials can pull away from the last.
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Can I warm nora® materials on a stovetop?
Basically, closed heat sources, such as an oven, are preferable. One-sided warming on a stovetop should only be used for material thicknesses of up to 8 mm, because otherwise you cannot guarantee that there will be uniform warming throughout.
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What temperature is optimal for warming a Lunatec combi sheet?
The oven should be set to a temperature of 130°–150° C.
Background: At this setting, the material consistently reaches an optimal temperature of 120-130° C. Please note the different activation times for the individual composite sheets! We would be happy to provide you with the appropriate documentation.
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What does “SG plus” stand for?
SG plus stands for proven disinfectability, outstanding quality under static and dynamic long-term stress, and a certified production site. The SG plus test mark adds microbial and physical tests and monitoring of the production site to the requirements of the eco-label ‘Schadstoffgeprueft’ (SG). This test mark was developed exclusively for nora® products.
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When nora® products are used, is it possible to track and trace them?
Yes, the batch numbers printed on the material ensure the necessary reliability for your quality management. The batch number can be used to reproduce the history of product manufacture at any time.
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Is it true that CONTITECH belongs to nora®?
In 2001 the repair materials of the brand CONTITECH found a new home in the nora® shoe component product range. Regarding the proven quality of CONTITECH heel and outsole materials, nothing has changed. Since then, the items have been integrated into the nora® product range and are managed under the brand nora®.
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If the last is rough, the unevenness always shows up in the material, how can I prevent this?
For rough lasts, it is recommended that you use a specimen shoe sheeting on the last, which evens out the roughness, making the surface of the material smoother.
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Where does the raw material rubber come from?
Natural rubber is a renewable raw material that is obtained from the sap of the tropical rubber tree (Hevea brasiliensis) and is delivered in the form of pressed balls of natural rubber. Industrial rubber is obtained through polymerisation of certain refinery products of petroleum. It is possible to produce rubbers with particular properties through targeted manufacturing processes. By adding high-quality minerals from natural sources and other components, these custom-tailored rubber types can be formulated to produce rubber mixtures designed for specific applications.
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