Processing device of halogen-free flame retardant polyethylene core material for fireproofing aluminum-plastic plate

Abstract

The invention discloses a processing device of a halogen-free flame retardant polyethylene core material for a fireproofing aluminum-plastic plate. The processing device is composed of an intermeshing co-rotating twin-screw extruder and a melt pump or a single screw extruder communicated with the intermeshing co-rotating twin-screw extruder, wherein the intermeshing co-rotating twin-screw extruder in the processing device is successively provided with a side feeding machine and a vent hole along the flowing direction of the material. The processing device provided by the invention enables the halogen-free flame retardant polyethylene core material for the fireproofing aluminum-plastic plate to be integrally formed in a processing manner, the operation is simple, a manufacturing technique process of an extruded product is greatly simplified, the production cycle is shortened, and the high efficiency and energy conservation are realized.

Description

technical field [0001] The invention relates to the technical field of production equipment, in particular to a processing device for a halogen-free flame-retardant polyethylene core material for fireproof aluminum-plastic panels. Background technique [0002] The aluminum-plastic panel is a composite panel with plastic as the core material, a three-layer composite symmetrical structural panel with an aluminum plate on the outside and a decorative or protective coating on the surface. It is widely used in the fields of construction and decoration. As the fire performance of buildings is regarded as an important indicator of its safety, it has been paid more and more attention by people. At present, in important public places, such as airports, stations, high-end entertainment venues and indoor and outdoor decorations of high-end high-rise buildings, relevant state departments stipulate that flame-retardant or non-combustible fire-resistant building decoration materials must ...

AI Technical Summary

Problems solved by technology

Generally, aluminum hydroxide and magnesium hydroxide are mainly used as flame retardants in high-filling flame retardant systems. Flame retardant does not produce harmful gas, but this kind of flame retardant relies on the water it produces to achieve the purpose of flame retardancy, so the flame retardant needs to be added in a relatively high amount, generally more than 50-60% (weight percentage), but The high filling amount has high requirements on the mixing extrusion molding equipment. The main difficulties are as follows: 1. Due to the large amount of filler powder added, it is difficult to achieve a good dispersion effect by adding forced feeding into the extruder. Unfused powder is easy to come out from the exhaust port and vacuum port

2. Due to the poor mixing and dispersing effect of the powder in the resin, it will be difficult to ensure the uniform flow of the melt in the plate mold, and the overall size of the plate cannot be guaranteed

[0005] This preparation method mainly has the following disadvantages: 1) Due to the re-plasticization and melting process of the retardant material, the physical and chemical properties of the plate will be reduced, the fluidity of the material will be affected, and the energy consumption of the product will be high and the production efficiency will be low.

2) Inorganic flame retardants are heated for a long time and are easy to decompose during processing, which will reduce the flame retardancy of the fireproof board

3) Due to the poor dispersion and mixing performance of the single screw, the length-to-diameter ratio should be greater than 35, and it should be a vented single-screw extruder

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