Halogen-free flame-retardant composite material and preparation method thereof

Abstract

The invention provides a halogen-free flame-retardant composite material and a preparation method thereof, and the halogen-free flame-retardant composite material comprises 10%-40% (by weight) of polyethylene, 4.5%-20% (by weight) of elastomer, 40%-70% (by weight) of halogen-free flame retardant, 0.5%-15% (by weight) of flame-retardant synergist and 1%-5%( by weight) of lubricant according to thetotal weight of the composite material, wherein the flame-retardant synergist is selected from one or more of melamine, melamine cyanurate and melamine high molecular weight phosphate. The preparation method comprises the step of carrying out melt compounding on the polyethylene, the elastomer, the halogen-free flame retardant, the flame-retardant synergist and the lubricant through an extruding machine. The halogen-free flame-retardant composite material has the advantage of novel property, environmental protection, safety, excellent flame retardance, good anti-melt droplet effect, good toughness, excellent molding and processing performance and the like, and can achieve the UL-94V-0 (the plate thickness is 4mm) flame retardant level, thereby being particularly applicable to preparing halogen-free flame-retardant aluminum-plastic composite plates.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant composite material and a preparation method thereof, in particular to a halogen-free flame-retardant composite polymer material for preparing aluminum-plastic composite boards and a preparation method thereof. Background technique [0002] Aluminum-plastic composite board is a new type of building decoration material, which has the advantages of light weight, good strength, smooth surface, rich and bright colors, and convenient construction. It is widely used in airports, hotels, stations, large entertainment venues and high-end high-rise buildings. Curtain wall, indoor and outdoor decoration and other occasions are indispensable elements of modern architecture. At present, countries all over the world have higher and higher requirements for the safety of building materials, and fire performance is one of the most important indicators of safety. However, the currently commonly used polymer compos...

AI Technical Summary

Problems solved by technology

Although the aluminum-plastic composite board core material with these flame retardant synergists has good flame retardant performance, ammonium polyphosphate, copper nitrate, etc. have certain water solubility, especially in humid environmental conditions, they are easy to migrate to the substrate. The surface of the material affects the bond strength with the aluminum plate, and even the ammonium polyphosphate may have deamination phenomenon during processing, resulting in bubbles and affecting the physical properties of the material. At the same time, there are acid sites on the main chain, which are corrosive to the aluminum plate and cause The yield of materials decreases and the total manufacturing cost increases