Ganter Norm Standard Parts - Catalogue Pagina 2159
Commercieel klantenaanbod**Beste verkopers van Ganter Norm
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Material Characteristics of Plastics Materials and Elastomers Duroplast Technopolymer Elastomers This group includes plastic materials which solidify by chemical reactions. They closely crosslink into spatial lattice patterns of macromolecules which gives Duroplast material high mechanical strength and surface hardness. Their elasticity is low, however. With increasing temperature and once the softening point is exceeded, this group of Technopolymer melts, can be heat distorted and solidifies again after cooling. This process can be repeated any number of times. Unlike Duroplast, there is no chemical reaction during processing. A feature of elastomers is that they can be deformed under minimal tensile or compressive stress. When the force effect decreases or no longer exists, the parts automatically return to their original, undeformed shape. Thus, they demonstrate the typical behavior of rubber. The curing process is irreversible. Unlike Technopolymer, Duroplast cannot be melted because it is rigid up to degradation temperature. Phenolic resins are among the most commonly used Duroplast materials. Technopolymer materials can be subdivided into amorphous and partially crystalline plastics. The disordered structure of amorphous materials allows the production of transparent components by injection moulding right through to crystal-clear parts. Partially crystalline Technopolymer have a structure resulting in enhanced mechanical properties and temperatures of use. In chemical terms, these are macromolecules which are interconnected by only a few chemical crosslinking bridges. In general, the molecular crosslinking of Duroplast creates good chemical stability. The coloring options of components made of Duroplast are limited. The wide variety of different Technopolymer and their options of modifications allow the production of “tailor-made” construction materials with respect to mechanical properties, chemical resistance, temperature resistance and different colors. With thermoplastic elastomers, the cross-links soften under the influence of heat, thus demonstrating a thermoplastic behavior. By way of modification, elastomers can be made in varying degrees of hardness. They can be dyed easily by adding color pigments. Material characteristics of Elastomers Page 2162 ff. Information The above details are general values without claiming to be complete. Material properties may vary widely through additives, modifications and environmental influence factors. The details are unsuitable as the sole basis for constructions. The data may not be used in place of tests to determine the suitability of a material for a specific purpose. No warranty or liability will be accepted fort the above specifications and details. Page 2158 | Material Characteristics
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