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Halogen-free flame retardant elastomer as a wire and cable outside the material mainly refer to the following indicators: 1. Environmentally friendly PVC material is the alternative source of environmental protection, countries and the well-known brands of environmental directives more and more stringent, at present we contact and fully comply with the environmental directive has rohs/reach/halogen-free/phthalate/dimethyl fumarate
/Pfoa&pfos/tbbpa/pahs/en71, before due to material technology development factors, the market has a part of halogen-containing flame retardant TPU/TPE applications are believed to be eliminated in the near future (typical products have lubrizol frtpu58202/spc, APA Frtpe) 2. Hardness consumer Electronic product connection line appeal feel soft and comfortable, for halogen-free flame-retardant elastomer used in cable industry, hardness in 80~90a is more common. Too low hardness will lead to material elasticity is missing, and not conducive to processing, too high hardness to make the cable feel stiff. Elastic body specific elastic feel, the same hardness and PVC material compared to the softness of the handle is biased.
Our experience, Shore 85A Halogen-free flame retardant elastomer and 80~82a (55~50p) PVC cable finished products feel soft similar. 3. Flame retardant cable finished product evaluation of fire retardant main reference VW-1 or FT-1 pass standard, need to be clear that the overall cable must fire. As different electronic information lines have different AWG design, their semi-finished insulating material has been limited (in the Pp/pe or Hytrel material selection), such as the selection of flame retardant classified collection olefin material, will cause voltage breakdown or signal transmission defects. Therefore, the flame retardant cable finished materials to the external material put forward very high flame retardant requirements.
Our experience, outside by the material flame retardant coking ability, cable after burning adhesion to the finished product formation of dense carbonized layer, protect wire insulation material, semi-finished products even without shielding materials (such as aluminum foil) protection, can easily pass VW-1 or FT-1 fire test. 4. Physical mechanical properties in the UL1581/758/62 standard for elastomer or 105℃PVC material minimum tensile strength 1.05kgf/mm2, minimum break elongation rate of 100%. As our halogen-free flame-retardant elastomer material, its mechanical properties are far beyond the traditional PVC cable requirements. The elongation of the external material can be used as one of the reference indexes for the elasticity of the cable product. We think that the application of halogen-free flame-retardant elastomer in cable industry should pay more attention to the tensile strength, tearing intensity, temperature-resistant grade (80/90/105℃), thermal deformation (121/150℃), hot and cold shock, non migration, etc., which can reflect the comprehensive performance of the material.