Waterproof gypsum board core, preparation method thereof and waterproof gypsum board

Abstract

The embodiment of the invention discloses a waterproof gypsum board core, a preparation method thereof and a waterproof gypsum board. The waterproof gypsum board core comprises calcined gypsum powder,starch, glass fibers, water and a processing aid, wherein the starch comprises hydrophobic starch and hydrophilic starch. The waterproof gypsum board comprises a waterproof gypsum board core and surface protection paper. By adopting a mode of compounding the hydrophobic starch and the hydrophilic starch, effective bonding among inorganic components in the gypsum board is guaranteed, and the surface protection paper attached to the surface can be effectively bonded, the density of the surface protection paper is not increased; meanwhile, the coverage of hydrophobic groups on the surface of thegypsum board can be enhanced, so that the water absorption performance of the gypsum board is effectively reduced, and the water resistance of the gypsum board is improved.

Description

technical field [0001] The embodiments of the present invention relate to the field of gypsum board materials, in particular to a waterproof gypsum board core, a preparation method thereof, and a waterproof gypsum board. Background technique [0002] Gypsum board has become a widely used decorative material because of its light weight, high strength, good sound insulation, heat insulation and fire resistance. It is widely used in various buildings such as residences, office buildings, shops, hotels and industrial plants. Inner partition walls, ceilings, sound-absorbing panels, ground-based panels and various decorative panels, etc. [0003] However, due to the factors of the gypsum board material (especially the gypsum board core), it is easy to absorb water and get damp, and once it absorbs water and gets damp, its strength will be significantly reduced, and problems such as warping and deformation will easily occur, especially when the humidity is relatively high. In the ...

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Problems solved by technology

[0005] 1) Spray waterproofing agent or add waterproof finish to the surface of gypsum board. However, this method not only has high requirements for construction, but also once defects appear on the surface of gypsum board and the sprayed waterproofing agent or waterproof finish is damaged, the waterproof effect will be great. discount;

[0006] 2) Doping inorganic gelling materials into gypsum boards. However, the essence of this method is that water-resistant hydration products are generated during the hydration process of gypsum, which makes gypsum change from a single crystal structure to a crystal gel structure, which will cause gypsum boards The density increases, and because the hydration speed of the inorganic gelling material is inconsistent with the gypsum, it will also affect the strength and other performance of the gypsum board, which greatly reduces the advantages of the gypsum board;

[0007] 3) Add hydrophobic organic matter, polymer resin and silicone oil. However, this method not only has high cost, but also reduces the adhesion of the inorganic components in the gypsum board, and the adhesion with the surface paper is greatly reduced. Moreover, the addition of a large amount of organic matter will also cause changes in the strength and weight of gypsum boards, resulting in a reduction in the advantages of physical and chemical properties

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