Preparation method of fireproof door core plate

Abstract

The invention relates to the technical field of building materials, and concretely relates to a preparation method of a fireproof door core material. The preparation method comprises the following steps: dissolving magnesium sulfate crystals in water to obtain a magnesium sulfate solution with the concentration of 26-30 [mu]m; selecting the following raw materials, by weight, 100-160 parts of magnesium oxide, 150-200 parts of the magnesium sulfate solution, 1.5-3 parts of a modifier, 1-2 parts of a reinforcing agent and 1-2 parts of polypropylene fibers; uniformly stirring the selected raw materials to obtain a raw slurry; selecting 1-2 parts of a foaming agent, adding water according to a ratio of 1:40, performing foaming treatment, and adding the foamed water into the raw slurry after foaming to obtain a door core plate slurry; and pouring the door core plate slurry into a forming die, and curing the door core plate slurry to obtain the fireproof door core material. The fireproof door core material has the advantages of being simple in production process, convenient to produce and process, good in fireproof performance, capable of saving energy, environmentally friendly and the like.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for preparing a fire door core material. Background technique [0002] Fire door core boards are mainly used for steel heat insulation fire doors, wooden fire doors, pipe well doors and fireproof entrance doors; fire door core boards mainly include the following types: aluminum silicate cotton door core boards, expanded perlite door cores Board and magnesite foam door core board. Among them, the aluminum silicate cotton door core board has been banned because its smoke toxicity index does not meet the national standard; the expanded perlite door core board is easy to loose and degummed when the steel plate is glued due to the poor strength of perlite itself. The transportation cost is high, and it is currently eliminated by the market; after 2006, most door factories use magnesium chloride fireproof door core board. It is mainly produced by using magnesium...

AI Technical Summary

Problems solved by technology

But the disadvantage is that magnesium chloride and halogen sheet materials contain a large amount of chloride ions. Chloride ions are prone to moisture absorption and halogen return in a humid environment, corroding the steel plate, and greatly shortening the service life of the fire door.

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