Halogen-free flame-retardant polyethylene functional material for aluminum-plastic composite board and preparation thereof

Abstract

The invention discloses a halogen-free flame-retardant polyethylene functional material for APCP and the preparation method of the material. The material has the following components and contents (based on weight proportion): 25-40% of polyethylene, 2.5-25% of modified polyethylene, 32-50% of brucite powders, 0.1-10.0% of silicone flame retardants, 0.5-3.5% of coupling agent, 0.5-8.5% of synergist, and 0.25-1.5% of antioxidant. The technical performance indicators of the material of the invention are as follows: 12.5 to19.5MPa for tensile yield strength, 30 to 230% for ultimate elongation, 15.5 to24.5 MPa for bending strength, 19.0 to 25.0KJ/m2 for notch impact strength, 85 to 95 DEG C for Vicat softening temperature, 1.25 to 1.37 g/cm3 for density, 32 to 36% for oxygen index, and 0.25 to 1.50g/10min for melt flow rate; besides, the environmental protection index of the material meets the International Safety Standards IEC62321, in line with the requirements of ROHS Directive. The preparation method of the invention is to use vacuum exhaust-type parallel twin-screw extruding hot-cutting and granulating technology to prepare the material. The raw materials of the invention can be easily obtained and the technology is easy to control; besides, the material of the invention has the advantages of excellent comprehensive performance and cost ratio, as well as good flame-retardant properties and thermal stability, which can be extruded and molded through injection and can realize large-scale continuous production.

Description

technical field [0001] The invention relates to a flame-retardant polyethylene functional material for aluminum-plastic composite boards and a preparation method thereof, in particular to a cost-effective, halogen-free, low-smoke, and environment-friendly flame-retardant polyethylene functional material and a preparation method thereof. Background technique [0002] The flame-retardant polyethylene core material for aluminum-plastic composite panels disclosed, used, and sold before the patent application is a traditional halogen-free flame-retardant polyethylene core material containing part or all of aluminum hydroxide and / or intumescent flame retardants. Two kinds of halogen-containing flame-retardant core materials and halogen / antimony flame-retardant polyethylene. Compared with this patent, although the former is a halogen-free flame-retardant polyethylene core material, because the flame retardant in the material contains part or all of aluminum hydroxide and / or intumes...

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Problems solved by technology

Compared with this patent, although the former is a halogen-free flame-retardant polyethylene core material, because the flame retardant in the material contains part or all of aluminum hydroxide and / or intumescent flame retardant, the material decomposition temperature is lower than that during processing. 200 ℃, and easy to produce bubbles, affecting the physical and mechanical properties of the product and the bonding strength with the aluminum plate, the extrusion speed of the plate is slow, the yield is low, and the total cost is high; the latter is a halogen-containing flame-retardant core material, Although it has a certain flame retardancy, due to the halogen flame retardant or the addition of halogen / antimony composite flame retardant in the material, it will produce a large amount of toxic carbon monoxide and highly corrosive hydrogen halide smoke in the event of a fire, causing secondary pollution. , can not meet the requirements of environmental protection, and cannot pass the certification of ROHS directive, so the aluminum-plastic panels produced by using it as the core material do not meet the requirements of environmental protection industry policies and the development direction of international halogen-free flame-retardant building materials, and are gradually being eliminated

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