Product丨BYK-MAX CT 4260—B1-grade low-smoke halogen-free cable material synergistic flame retardant solution
Release time:
2024-08-02
With the official implementation of the national mandatory standard GB 31247-2014 on September 1, 2015, and the EU cable CPR certification on July 1, 2017, the implementation of this regulation has led to higher and higher requirements for flame retardancy and environmental protection of cable materials, especially for high-altitude building cables and fire alarm cables used in public dense places (related to life and property safety). Therefore, how to quickly form carbon and improve the hardness of the carbon layer has become the primary challenge faced by low-smoke halogen-free cable materials.
As one of the world's leading suppliers of thermoplastic additives, BYK's layered silicate series products are highly praised in the industry. In order to meet the above regulatory requirements (known as B1 flame retardant in China), BYK-MAX CT 4260 is a specially treated high-purity montmorillonite. The interlayer spacing of the treated montmorillonite becomes larger. At the same time, since the surface of the lamellae is covered by the long alkyl chains on the organic ions, the interlayer microenvironment is changed, and the inner and outer surfaces change from hydrophilic to lipophilic, which improves the compatibility of the polymer matrix and the monomer, and is conducive to the formation of polymer/layered silicate nanocomposites.
Based on the characteristics of BYK-MAX CT 4260 with large interlayer spacing, white color and easy dispersion, adding 1-3% in the PE/EVA system can be highly synergistic with ATH/MgH, reducing the amount of flame retardant added while improving the flame retardancy of the material. The rapid carbonization and high carbon layer hardness effectively prevent the cable from intensifying combustion, and can stably pass the carbon layer height FS <1.5m required by the domestic B1 flame retardant and reduce heat release.
At the same time, BYK-MAX CT 4260, as a large-layer structure with a diameter-to-thickness ratio of 300-500, plays a "structural fixation" role after being evenly dispersed in the system. Macroscopically, it exhibits anti-drip characteristics, resulting in almost no combustion dripping during the combustion process, as shown in the following figure:
As a silicate with a layered structure, in order to ensure full dispersion and avoid agglomeration and blocking of the network, it is recommended to process it in the form of prefabricated masterbatch and side feeding during use. For cables that are required to pass the VW-1 flame retardant requirements, BYK-MAX CT 4260 can significantly improve the flame retardant "insurance factor" and reduce the risk of unstable flame retardant when added in a low amount of less than 1%. Compared with commercially available montmorillonite and needle-shaped sepiolite, BYK-MAX CT 4260 can achieve a certain degree of comprehensive cost reduction in a specific formulation system under the same efficacy. In addition to BYK-MAX CT 4260, in order to meet the more differentiated requirements of different cable customers, BYK CLOISITE-20A is designed to be easier to disperse, which has a significant effect on maintaining the material's elongation at break and lower viscosity; and CLOISITE-SE 3000 has a lower water absorption rate than ordinary modified montmorillonite, which can significantly improve the volume resistivity.
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SEOWebsite construction:China Enterprise Power PudongThe license number for the production and operation of hazardous chemicals is: Shanghai (Feng) Emergency Management Xu [2021]202233(FY)
The license number for the production and operation of hazardous chemicals is: Shanghai (Feng) Emergency Management Xu [2021]202233(FY)
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The license number for the production and operation of hazardous chemicals is: Shanghai (Feng) Emergency Management Xu [2021]202233(FY)