Halogen-free flame retardant elastomer as a wire and cable outside the material mainly refers to the following indicators:
1. environmental protection
The replacement of PVC materials is due to environmental protection. The environmental directives of various countries and famous brands are becoming more and more stringent. At present, the environmental directives that we meet and fully meet are RoHs / REACH / Halogen-free / Phthalate / Dimethyl Fumarate / PFOA & PFOS / TBBPA / PAHs / EN71, previously available due to material technology development factors, some halogen-containing flame retardant TPU / TPE applications on the market are believed to be eliminated soon (typical products are Lubrizol FRTPU58202 / SPC, APA FRTPE)
Consumer electronics cable demands soft and comfortable, for halogen-free flame retardant elastomer used in the cable industry, the hardness of 80 ~ 90A more common. Hardness is too low will lead to material elasticity is missing, and is not conducive to processing; hardness is too high to make the cable feel stiff. Elastic body unique elastic feel, the same hardness and PVC material compared to feel softness deviation. Our experience, Shore 85A halogen-free flame retardant elastomer and 80 ~ 82A (55 ~ 50P) PVC cable products feel soft similar.
3. Flame retardant
Evaluation of the finished product of the cable Flame retardancy mainly refers to the VW-1 or FT-1 pass standard, it is clear that the overall cable to be fire. As the different electronic information lines have different wire gauge design, the semi-finished insulation material has been limited (in the PP / PE or Hytrel class material selection), such as the use of flame retardant polyolefin materials, will cause voltage breakdown or signal transmission defects The So the flame retardant cable products made by the external material is very high flame retardant requirements. Our experience, outside the material flame retardant coking ability, the cable after burning adhesion on the finished product to form a dense carbon layer, to protect the wire insulation material, semi-finished products even without shielding materials (such as aluminum foil) protection, can easily through the VW-1 Or FT-1 fire test.
4. Physical and mechanical properties
In UL1581 / 758/62 standard for elastomers or 105 ℃ PVC material minimum tensile strength 1.05kgf / mm2, the minimum elongation at break of 100%. As our halogen-free flame retardant elastomer material, its mechanical properties have been far beyond the traditional PVC cable requirements. The elongation of the outer material can be used as a reference for the elasticity of the finished product. We believe that the application of halogen-free flame retardant elastomers in the cable industry should pay more attention to the tensile strength, tear strength, temperature level (80/90/105 ℃), thermal deformation (121/150 ℃) Impact, non-migration, etc., which can reflect the comprehensive performance of the material.