Non-halogen flame-resistant sandwich materials with polyethylene for fire-proof aluminium plastic plate and production thereof

Abstract

A non-halogen and fire-retardant polythene sandwich layer material for fireproof aluminum plate and its production are disclosed. The sandwich layer consists of low-density polythene 15-30 proportion, linear low-density polythene 15-20 proportion, polythene and octylene multi-polymer 3-15 proportion, aluminum hydrate 30-45 proportion, magnesium hydrate 10-15 proportion, fire-retardant synergist 2-25 proportion and coupler 0.5-5 proportion. The process is carried out by mixing aluminum hydrate and magnesium hydrate with coupler separately, mixing at 80-120 DEG C for 15-25mins by high-speed kneader, extruding out into strips by double-screw extruder, granulating by thermal cutting at 100-179 degrees C or cooling and granulating by dicing cutter to obtain final product. It has better machining fluidity, fire-retardant effect and mechanical performance.

Description

technical field [0001] The invention relates to a material used in a building decoration plate and a preparation method thereof, in particular to a halogen-free flame-retardant polyethylene composite material and a preparation method thereof. Background technique [0002] Fireproof aluminum-plastic panel is the abbreviation of fireproof aluminum-plastic composite panel. The fireproof aluminum-plastic composite panel is mainly composed of three layers of plates. They are the inorganic flame-retardant plastic core board (also called the core layer) in the middle, and the aluminum panel and aluminum metal base plate on the back. The inorganic flame-retardant plastic core board is obtained from the corresponding pellets through a board extrusion molding machine. The material used to manufacture the core board (core layer) is flame retardant modified polyethylene pellets (referred to as flame retardant polyethylene). This kind of flame retardant polyethylene is obtained on the ...

AI Technical Summary

Problems solved by technology

A high amount of addition causes a significant decrease in the mechanical properties of the polymer material such as toughness and strength

[0003] Chinese patent application 02113998.9 discloses a halogen-free flame-retardant polyethylene core layer material for fireproof aluminum-plastic panels and its preparation method. The material contains polyethylene 10-40% (weight percentage, the same below), modified polyethylene 5-20% %, halogen-free flame retardant 35-65%, flame retardant synergist 0.5-10%, other additives 2.5-8.5%; other additives include coupling agent, dispersant, rheological agent, antioxidant , ultraviolet absorber, crosslinking agent, colorant; halogen-free flame retardants are aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, basic magnesium sulfate; so the core material of this application belongs to the use of metal oxide flame retardant The flame-retardant polyethylene of the system; due to the high content of the halogen-free flame retardant used, in order to prevent the decline of mechanical properties, the core material of the application also contains modified polyethylene (ethylene-vinyl acetate copolymer (EVA), etc. and / or polar graft copolymers of polyolefins and unsaturated monobasic acids / unsaturated dibasic acids / maleic anhydride), but these copolymers are more cohesive, which leads to the processing of core materials The fluidity and dispersibility are not very good. If polar graft copolymers are used, the compatibility with polyethylene is not very ideal, and its mechanical properties still need to be further improved.

And because the cost of magnesium hydroxide is relatively high, and the extruding granulation temperature of the composite material is as high as 180°C-200°C, so the energy consumption is high and the cost is also high