Polystyrene/polyethylene blended high-flame-resistance extruded sheet and production method thereof

Abstract

The invention discloses a polystyrene / polyethylene blended high-flame-resistance extruded sheet. The polystyrene / polyethylene blended high-flame-resistance extruded sheet comprises a fresh polystyrene material, a recycled polystyrene material, polyethylene, styrene-sodium acrylate, magnalium hydrotalcite, decabromodiphenyl ether, silicon-based fire retardant, color master batch, benzoyl peroxide butyl ester, benzoyl peroxide, polyethylene grafted zinc maleate and foaming agent. The invention provides a production method correspondingly to obtain the extruded sheet with good flame resistance performance. The polystyrene / polyethylene blended high-flame-resistance extruded sheet and the production method thereof have the advantages that the recycled polystyrene material and the fresh polystyrene material are used jointly for producing the high-strength extruded sheet, so that production cost is reduced greatly; by dealing with the chain scission problem of the recycled material, the recycled material has better performance than ordinary waste; through addition of the auxiliary material polyethylene, proper solubilizing agent and other additives, product tenacity is improved, and the problems of embrittlement and easiness in breakage are solved; through addition of the decabromodiphenyl ether and the silicon-based fire retardant according to a certain ratio and combination with other additives, good flame resistance is achieved, and the oxygen resistance index can reach 48.

Description

technical field [0001] The invention relates to an extruded plastic board, in particular to a high flame-retardant extruded plastic board blended with polystyrene / polyethylene and a preparation method thereof. Background technique [0002] Existing external wall insulation materials on the market mainly use modified benzene board, extruded board and polyurethane. Among them, benzene board is the cheapest, and its insulation effect is average, and it will absorb water and deform. Plastic panels are much better than benzene panels. The thermal conductivity is lower than that of benzene panels, and the price is slightly higher. Polyurethane is the best performance among existing insulation materials. Lower than benzene board and extruded board, basically half the thickness of the polyurethane insulation layer can achieve the insulation effect of the original thickness of benzene board and extruded board, but the price is much higher than that of benzene board and extruded board...

AI Technical Summary

Problems solved by technology

At present, many polystyrene plastic products are discarded after use, and the amount of garbage formed is relatively large, resulting in serious white pollution problems, and these white pollution sources cannot be degraded by themselves. To solve the problem of white pollution, it is necessary to treat these Waste plastic for recycling

[0003] Recycled polystyrene waste plastics generally need to go through steps such as heat melting, filtration, decolorization, recrystallization, and granulation. This step is likely to cause molecular chain breakage. The polystyrene recycled materials after these chain breaks are used directly. In the production of wallboard, the strength of the product obtained is low, the performance of the product is low, and the best flame retardant effect cannot be achieved.

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