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Jul 06, 2023
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the loose tube is used as a physical protective layer in contact with colored optical fiber, and its performance directly affects the transmission performance of the optical fiber. at present, material PBT must not only meet the mechanical stability, but also meet the requirements of high-speed production lines, and at the same time meet the requirements of high flexibility and high resistance to lateral pressure.
at present, the main engineering plastic products used in 5g fiber optic cable including modified pp, modified PBT, etc., among which modified PBT is the most widely used due to its good physical and chemical properties. the cost of using modified pp is about 30% lower than that of modified PBT, but the physical and chemical properties of modified PBT are better than modified pp. the sheath of 5g optical cable selects polyethylene resin of different densities as the main raw material according to different application scenarios, and adds plasticizers, antioxidants, carbon black, processing modifiers, catalysts and other additives in a certain proportion for mixing and plasticizing, it is made of granulation, generally can be divided into LDPE, MDPE, HDPE, pe/pa blended modified materials.
the low-shrinkage PBT masterbatch developed by Anmei has stable coloring and low-shrinkage performance to reach the advanced level of the industry. it has been successfully applied to the industry's well-known optical cable manufacturing products. pe/pa blended modified material has good processing performance, flexibility, toughness and wear resistance, good self-lubricating properties, and its protective layer can prevent termites, rodents, acid and alkali resistance, and can be used for burying used in extreme environments such as underground, exposed and outdoor, high and low temperature, and meets RoHS environmental protection requirements.
