Zinc Borate Flame Retardant Filler

Zinc borate flame retardant filler not only serves as an efficient flame retardant synergist, but also actively improves the processing flowability, mechanical properties, thermal stability, and surface characteristics of the substrate, achieving a paradigm shift from "passive filling" to "active reinforcement", with inherent chemical properties such as flame retardancy and smoke suppression.

Core strengths

·One dose multi energy, simplified formula: a single additive simultaneously achieves the functions of flame retardancy, smoke suppression, filling, and processing aid, reducing the types of additives in the formula and lowering complexity.

·Performance synergy rather than performance compromise: By optimizing the shape factor, particle size distribution, and surface energy of particles, it is often possible to improve or at least maximize the impact strength, bending modulus, and surface smoothness of materials while improving their flame retardant rating.

·Cost effectiveness optimization engine: As a high cost-effective solution to partially replace more expensive engineering plastics, special rubber, or main flame retardants, while improving multiple performance indicators.

·Broad spectrum material compatibility: A series of products designed specifically for various polymer matrices (from polyolefins to engineering plastics, from general rubber to composite materials), providing one-stop filling solutions.

Mechanism of action

1. Particle physics: transition from "stress concentration point" to "stress transfer point"

Traditional irregular and rough surface fillers (such as untreated aluminum hydroxide) are prone to stress concentration in the matrix, leading to brittle fracture.

·Spheroidization reduces stress concentration: Spherical particles can uniformly disperse stress, reduce obstacles to the movement of polymer molecular chains, and significantly improve the impact toughness of the filling system, which is the essential difference from ordinary mineral fillers.

·Surface chemical bonding enhancement: Specialized surface treatment agents form chemical or physical bonds between filler particles and polymer chains, effectively transferring external forces from the flexible matrix to the rigid filler, enhancing the modulus and strength of composite materials.

2. Rheological optimization

·The "ball bearing" effect, especially the high sphericity particles of the F-L series, play a role similar to miniature bearings in polymer melts, reducing internal friction of the melt, improving processing flowability, reducing extruder torque, and increasing injection filling speed, especially suitable for complex thin-walled products.

·Reduce oil absorption demand: A lower oil absorption value means a reduced demand for liquid components (plasticizers, resins) in the formula, which helps to lower overall costs and improve the migration resistance of the final product.

3. Flame retardant filling synergistic effect

·Dense "flame retardant barrier: As a filler, it can be more evenly distributed in the matrix, and together with the decomposition products of the flame retardant during combustion, it forms a denser and defect free expanded carbon layer.

·Heat capacity contribution: It has a high heat capacity and can absorb more heat in the early stages of a fire, delaying the temperature rise of the substrate.

Application field

1. In PVC products: replace/cooperate with traditional fillers

·Application scenarios: wire and cable sheaths, flooring, soft products.

·Challenge: When filling with calcium carbonate or clay, the flame retardancy decreases; When using high filling ATH, the mechanical properties and processability deteriorate.

2. In polyolefin (PP/PE): as a functional reinforcing filler

·Application scenarios: flame retardant household appliance shells, automotive modified materials, pallets.

·Challenge: Inert polyolefin and poor compatibility of fillers; High filling leads to embrittlement.

3. In engineering plastics (PBT/PA): improving CTI and processability

·Application scenarios: electronic and electrical connectors, circuit breakers.

·Challenge: High requirements for CTI; Thinning requires excellent fluidity.

4. In rubber (such as EPDM, NBR): multifunctional reinforcing filler

·Application scenarios: flame retardant sealing strips, conveyor belts, cable sheaths.

·Challenge: Find functional fillers that do not affect elasticity and permanent compression deformation.

If you are looking for a good zinc borate flame retardant filler that can improve fluidity, surface quality, and flame retardancy as a single additive without increasing costs, and solve difficult problems encountered in processing, Taixing will be your trusted partner.