Industry News

In polymer flame retardant formulation design, zinc borate is widely used as an efficient, low-toxicity, and multifunctional inorganic flame retardant. The scientific selection between hydrated forms (especially the 3.5-hydrate) and anhydrous forms constitutes a critical technical decision for engineers. This article will provide theoretical support from multiple dimensions.

Polyvinyl chloride (PVC) is the dominant choice for cable insulation and sheath materials, and its flame retardant properties are directly related to the safe operation of the power system. Among numerous flame retardants, 3.5 hydrated zinc borate (2ZnO·3B₂O₃·3.5H₂O) has become a key component in PVC cable formulations. This article will systematically analyze the scientific basis behind this choice.

In the family of zinc borate flame retardant synergists, the difference in hydration state is not simply a physical parameter, but points to completely different material design philosophies and application boundaries. ZB-2335 (2ZnO·3B₂O₃·3.5H₂O) and ZB-1H series (generally referring to low hydration, typical such as 2ZnO·3B₂O₃·H₂O) represent two core technological paths: the "active cooling" strategy based on crystal water phase transition heat absorption and the "passive protection" strategy based on high-temperature glass barrier. This article will systematically deconstruct the essential differences between the two, providing a theoretical framework for the precise design of high-temperature flame retardant formulas.

In halogen-free flame retardant systems, zinc borate, as an efficient multifunctional synergist, has become an indispensable component for improving overall performance. Among them, the "2335" brand (usually corresponding to the chemical formula 2ZnO·3B₂O₃·3.5H₂O) is widely recommended due to its unique performance balance.

In the field of halogen-free flame retardant engineering plastics, many formulation engineers often point to a specific code: ZB-2335 when faced with V-0 flame retardant requirements for materials such as PA6 and PA66. Behind this phenomenon is not a simple market trend, but a deep consensus based on materials science, combustion chemistry, and process engineering.

In the global trend of halogen-free flame retardant and functional additive industry upgrading, melamine cyanurate (MCA) has become the preferred functional additive for high-end materials such as nylon, polyurethane, elastomers, wires and cables, electronic appliances, etc. due to its core characteristics of halogen-free, low smoke, non-toxic, excellent thermal stability, and outstanding flame retardant efficiency.