*Self - adhesive Waterproof membrane
Self - adhesive waterproofing membrane can be divided into three categories according to the types of products currently on the market: self-adhesive rubber asphalt waterproofing membrane, self-adhesive polymer modified asphalt polyester tire waterproofing membrane and polymer self-adhesive composite waterproofing membrane.
In the near future, laws and regulations such as environment, energy conservation and emission reduction will play an increasingly important role in the selection of waterproof materials and application methods, such as self-adhesive waterproof membrane materials, which have obvious advantages in these aspects.These self-adhesive waterproofing systems have been listed because of the safety problems related to hot asphalt and hot melt application, and partly because of the environmental problems involved in solvent-based cold adhesives. Self - adhesive coil systems have already been successfully applied in developed markets abroad, and such technologies are relatively mature.
Application Advantages of Self - adhesive Waterproof Coil;
Self - adhesive membrane materials have the following advantages: First, they meet the current requirements of safety and environmental protection.This kind of membrane material does not need heating when it is used, has no peculiar smell and is safe to use.There are no volatile organic substances and it is environmentally friendly.
Another advantage of self-adhesive coil is its convenient use.It does not require special equipment;Compared with many other traditional waterproofing materials, the labor intensity is less.The construction steps are simple: roll out the membrane material on the treated base surface;Later, the release film was torn off and the coil was glued to the base.Next, follow the same method of laying, and the end lap joints and joints shall be constructed according to the manufacturer's requirements.The pre-laid anti-sticking waterproof membrane material is easier to use in construction: it is laid empty on the base layer and finished after temporary fixing and joint treatment.
The rubber asphalt self-adhesive layer of the self-adhesive waterproof membrane material has the characteristics of low strength, good flexibility, strong creep deformation, no solvent and the like, and has good bonding and sealing performance.The self-adhesive layer can maintain the adhesive sealing performance for a long time and can play a long-term sealing role for the base layer.This kind of membrane material has the characteristics of full adhesion method and can play a long-term sealing role on the base layer to prevent leakage and channeling.The self-adhesive layer is also a stress buffering and absorbing layer between the cladding layer and the base layer.When cracks occur in the base layer due to stress action, the bonding and sealing layers adhered to the surface of the base layer can buffer and absorb the influence of the base layer stress on the surface layer through its own displacement and thickness change due to its strong deformation capability and considerable extension capability, thus solving the " 0" cracking in full-adhesion construction.
Self - adhesive modified asphalt waterproofing membrane;
Modified asphalt coil has been used in developed countries for decades.Now the technology has developed to use the technology of self-adhesive coil instead of open fire and heating.This technology has also been vigorously promoted and applied in China.
Since the self-adhesive coil must be able to adhere at 10 ℃, while the ordinary SBS mixture has less adhesion at ambient temperature, it is not suitable for use as a self-adhesive coil at low temperature.In the past, this limited the application of self-adhesive webs.In recent years, with the continuous development and progress of technology, self-adhesive membrane material has such a reality that it can also be constructed at low temperature. For example, the self-adhesive waterproof membrane material produced by our company can meet the low temperature environment, and the viscosity of this formula membrane material is reduced, making it soft to have good adhesion, long-term high peel strength and suitable adhesiveness at low temperatures such as below 10 ℃.Advances in technology have enabled traditional modified webs to self-adhere successfully as originally hoped without the need for hot melt.
Self - adhesive webs do not require curing time as cold adhesives do.The self-adhesive membrane material can be directly used on the treated base surface, can immediately reach the initial peel strength, and can be waterproof at ambient temperature.Most manufacturers require self-adhesive webs to be used at ambient temperatures above 10 C ..Usually under the action of air, sunlight or other external heating, the maximum peel strength will be reached at the joint in a few days.
Self - adhesive polymer modified asphalt polyester tire waterproof membrane material;
The self-adhesive polymer modified asphalt polyester tire waterproof membrane material is a reinforced self-adhesive waterproof membrane material made of polyester fiber non-woven fabric as the base, polymer modified asphalt mixed with tackifying material as the dip coating material, polyethylene film or isolating film as the isolating layer on the upper surface of the membrane material, and peelable silicon-coated isolating film or isolating paper as the anti-adhesive isolating material.
Its characteristics are obvious: cold construction, no use of open flame, no use of adhesive, no pollution to the environment, belonging to environmental protection products;The tensile strength is high and the elongation is large, and it has strong adaptability to the expansion or cracking deformation of the base layer.can form a high-strength waterproof layer and has strong resistance to pressure water;Polyester fiber felt is used as the tire base for fatigue resistance, puncture resistance and corrosion resistance.The whole self-adhesive asphalt coating has excellent low temperature flexibility ( - 20 ~ - 30 ℃ );Good bonding performance and self-healing function. The coil is fully bonded to the base, and the joint itself is bonded with the coil for the same life.
Self - adhesive polymer composite waterproof membrane material;
Complementary performance of composite waterproof system: We know that single material is often limited in its application due to the limitations of the material itself. In order to overcome its shortcomings, different materials are often combined to form a waterproof layer with complementary performance to meet the needs of building waterproof engineering.
As a surface waterproof layer, polymer waterproof membrane material has the advantages of high tensile strength, large elongation, high elasticity and aging resistance, but there are also some phenomena such as stress contraction, difficulty in finding damage points after cracking, easy to cause delamination, water seepage and water breakthrough.This requires that a waterproof material with good adhesion can not only block the pores and micro cracks in the base layer, but also firmly adhere to the base layer without delaminating and allowing channeling water to penetrate into the base layer.At the same time, it has high shear strain and can absorb the stress transmitted by the waterproof material on the surface so that its stress can be buffered.
The self-adhesive and polymer waterproof membrane material can absorb the stress transmitted by polymer waterproof membrane material and improve the backing effect of the composite waterproof layer.At the same time, close and block the capillary holes and micro cracks in the base layer, which can firmly adhere to the base layer without delaminating, prevent channeling water into the base layer, and improve the waterproof effect.Self - adhesive has a unique overlapping method of body bonding, which is tight and reliable.Excellent resistance to cracking and deformation, shear strain and viscoelasticity of bonding interface;The excellent sealing property and self-healing property limit water seepage within a very small range.The experimental data show that the two materials, polymer waterproof membrane material and self-adhesive material, are obviously complementary to each other
Another major advantage of the self-adhesive waterproofing membrane method is that it provides a more uniform construction speed, eliminates the problem of insufficient adhesion or adhesive, and reduces related air drying problems.Since no relevant bonding curing time is required, the self-bonding construction method has less labor intensity and faster construction speed.Recently, some manufacturers have done experiments and comparisons: this method is up to 50 times faster than the tape joint method, 5 times faster than the water-based adhesive and 3 times faster than the oil-based adhesive.Another advantage of this method is that it eliminates the chance of dust particles flying in the air contaminating the membrane.
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