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Aug 4, 2021
The board core and protective paper have been waterproofed. According to the requirements of the national standard, the paper surface and board core of the water-resistant gypsum board must meet certain waterproof requirements (the surface water absorption is not more than 160 grams, and the water absorption rate is not more than 10 %). Water-resistant gypsum board is suitable for use in places where the continuous relative humidity does not exceed 95%, such as toilets, kitchens, bathrooms, etc.
Gypsum board is mainly used for engineering or home decoration. Because of its good toughness (applicable for special-shaped tops) and relatively low price, it has always been the first choice of the majority of decorating masters. Secondly, the gypsum board itself is a secondary crystalline product, and the water crystals contained therein can effectively achieve the effect of heat absorption, and the fire prevention effect is more significant. In addition, because the foaming agent is used, the gaps are properly arranged in the plaster, which has the effect of sound insulation and sound absorption. Moisture-resistant series are made of moisture-proof treatment on the paper surface of the gypsum board. The water-resistant gypsum board is the core gypsum that has also been water-resistant. Moisture-resistant boards are mainly used in basements or indoor places with high relative air humidity and high construction requirements. Water-resistant gypsum board is commonly used in bathrooms or kitchens. Of course, there are also many fireproof and waterproof materials on the market, such as calcium silicate board and FC board. Glass magnesium boards are fire-resistant and moisture-resistant. However, because of their own material characteristics, they limit their scope of use. Therefore, they cannot replace the dominant position of gypsum board for the time being.
Waterproof principle
Both the gypsum core and the face protection paper are treated with moisture-proof and silicone oil is added. The treatment principle of moisture-proof is the coating principle, and the silicone oil envelops the gypsum molecules.
Gypsum board is a lightweight construction sheet made of natural gypsum and protective paper as the main raw materials, mixed with appropriate amounts of fiber, starch, coagulant, foaming agent and water. In terms of performance, it has the following characteristics:Low energy and high efficiency.The energy consumption of producing the same unit of gypsum board is 78% less than that of cement. In addition, the investment is small, the production capacity is large, the process is simple, and it is convenient for large-scale
Using paper-faced gypsum board as the partition wall, the weight is only 1/15 of the brick wall of the same thickness and 1/10 of the block wall, which is beneficial to the earthquake resistance of the structure and can effectively reduce the cost of the foundation and the main structure.
heat insulation
About 60% of the gypsum board core is tiny pores. Because the thermal conductivity of air is very small, it has good light-weight thermal insulation performance.
Since the gypsum core itself is incombustible and will absorb a lot of heat in the process of releasing the water when it encounters fire, and delay the rise of the surrounding environment temperature, the paper-faced gypsum board has good fire and flame retardant properties. Tested by the National Fire Testing Center, the fire resistance limit of the gypsum board partition wall can be up to 4 hours.
The single-layer wall composed of a single lightweight material, such as aerated concrete and expanded perlite board, can only meet the requirements of sound insulation when its thickness is large. Good sound insulation performance.
Decoration function
The surface of the gypsum board is flat, and the joint between the board and the board forms a seamless surface, and the surface can be directly decorated.
Paper-faced gypsum board has the properties of nailing, planing, sawing, and sticking. It can be used for interior decoration and can achieve an ideal decorative effect. It only needs a cutting knife to cut the paper-faced gypsum board at will. The construction is very Convenient, using it as a decorative material can greatly improve construction efficiency.
Due to the large porosity of gypsum board and proper pore structure distribution, it has high air permeability. When the indoor humidity is high, it can absorb moisture, and when the air is dry, part of the moisture can be released, so it can adjust the indoor humidity to a certain extent. This function of the paper-faced gypsum board is called "breathing" in foreign countries. It is precisely because of the unique "breathing" performance of gypsum board that indoor humidity can be adjusted within a certain range to make living conditions more comfortable.