Waterproof membrane is the first layer of protective film for waterproof engineering, and its quality will directly affect the future waterproof effect. There are many types of waterproof membranes on the market and there are many brands. Today we will first introduce you to vinyl chloride waterproof membranes.
PVC waterproof membrane is good
First, what is polyvinyl chloride waterproof membrane?
Polyester fiber reinforced polyvinyl chloride (PVC) waterproofing membrane, polyester fiber reinforced polyvinyl chloride (PVC) waterproofing membrane is a kind of thermoplastic PVC coiled material. The coil is made of polyester fiber fabric. Reinforcing ribs, through a special extrusion coating process, a polymer membrane formed by combining a double-sided polyvinyl chloride plastic layer with an intermediate polyester rib.
The combination of advanced polyvinyl chloride plastic layer and mesh structure of polyester fiber fabric gives the coil excellent dimensional stability and low thermal expansion coefficient. Improve the long-term performance of coils exposed directly to the environment. Product specifications: Width: 2-2.1m, thickness: 1.2mm-2.0mm, length: 20m or more. Construction method: hot air welding, so as to ensure the effect of the weld.
Second, polyvinyl chloride waterproof roll advantages
1, long life, anti-aging, roofing materials can be used for more than 15 years, underground for up to 50 years.
2, high tensile strength, high elongation, mat processing changes.
3, low temperature flexibility, adapt to the environment temperature changes.
4, the root system permeability is good, can be planted roof. But the characteristics are worse than the copper tire SBS. Copper tire SBS is recommended for planting roofs with strong penetrating root systems to ensure effectiveness.
5, anti-perforation is good.
6. Convenient construction, using hot air welding torch welding, solid and reliable weld, no environmental pollution.
7, strong chemical resistance, suitable for special occasions.
8, with good plasticity, corner details easy and quick handling.
9, easy maintenance. However, the cost of the new construction unit is relatively high, at around 45 yuan per flat.
Polyvinyl chloride waterproof roll construction method
1, full post method: that is, in the roll of waterproof membrane material and the base surface of the stick structure. This method is applicable to the conditions of less deformation of the roof structure, smaller roof area and relatively dry base surface. The use of the full-stick method to lay a roll of material, since there is a thickness of cement material between the roll and the base house, the overall waterproof performance of the roof is improved, but if the roof deformation is large or the base layer is wet, the coil is waterproof. The layer is prone to cracking or kicking.
2, empty shop method: When laying waterproofing membrane, the membrane and the base layer are only bonded within a certain width, and the rest of the non-bonding construction method is called empty shop method. When paving, the joints of the roof shall be prominent at the corners of the cornice, roof and roof. The width of the adhesive layer between the coil and the base shall not be less than 800 mm due to the full coating of the cement material. Because the empty shop method can make the web and the base layer do not stick to each other, reducing the method of using the spot-like bonding of the base layer is called point sticking, and requires no less than 5 points per square meter, and the area per dot is 100mmx100mm: Waterproof layer around a certain range (not less than 800MM), it should also be firmly bonded with the base layer.
Polyvinyl chloride waterproof roll construction precautions
First of all, coils with a thickness of 1.2 mm or more cannot stick to uneven bases, especially for yin and yang corners, corners, and irregularities. Some units proposed the hot-melt method. If it is said that the straight seam can be hot-melt welded, it is difficult to operate the welding of special parts. This material is different from SBS modified bitumen material that can be constructed by heating with fire.
The flexibility of polyethylene polypropylene waterproof membrane with such a thickness can be solved in the production process. If ethylene-vinyl acetate is used, it can solve the hard problems of the coil, but due to the high cost, the market price of the coil Lower, so no one wants to increase this cost. The author believes that in the application of polyethylene polypropylene waterproofing membranes, there are many reasons that affect the quality of waterproof construction, but the treatment of corners and special-shaped parts is the most important thing, if you use the conventional 1.2mm above the market The thickness of the coil to the construction, the use of polyvinyl alcohol adhesives or polymer adhesives, the corners and special-shaped parts of the bond can do nothing. Therefore, the thickness of the coil is important, but the corresponding problems brought about by the increase in thickness cannot be ignored.
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