Synthetic polymer waterproofing membrane is based on synthetic rubber, synthetic resin or a mixture of the two as the base material, adding the right amount of chemical additives and fillers, etc., using mixing, extrusion or rolling rubber or plastic processing technology Made of curled sheet-like waterproof material.
Synthetic rubber: EPDM waterproofing membrane (EPDM), chlorinated polyethylene (CPE) waterproofing membrane
Synthetic resin: polyvinyl chloride (PVC), polyethylene (PE)
Rubber and plastic blend: chlorinated polyethylene - rubber blends waterproofing membrane
Synthetic polymer waterproofing membrane GB GB17173.1-2006 provides the coil size, appearance quality, physical and mechanical properties of the test indicators.
High density polyethylene (HDPE) waterproofing membrane
Building waterproof material should have sufficient elastic-plastic at low temperature, not brittle fracture; at high temperature enough strength and stability, in the 80 ℃ ~ 130 ℃ when not flowing; polymer in high elastic state, a good elastic-plastic , And non-stick flow. The polymer waterproofing material should be in a high elastic state at a temperature range of -20 ° C or -40 ° C to 80 ° C or 100 ° C.
High tensile strength
Tensile strength is generally above 3MPa, the maximum tensile strength of up to 10Mpa or so, to meet the coil in the handling, construction and application of the actual needs. Elongation at break elongation is generally greater than 200% elongation, up to about 500%, can adapt to the needs of structural telescopic or cracking deformation.
High tear strength
Tear strength is generally more than 20KN / m, excellent crack resistance.
Good heat resistance
At temperatures above 100 ° C, the web will not flow and produce concentrated bubbles.
The use of factory mechanized production, can better control the quality of products.
Low temperature flexibility is good
In the low temperature below -20 ℃ also has a flexible, and some can be up to -45 ℃ (such as EPDM), suitable for use in cold areas. Corrosion resistance good acid, alkali, salt and other chemical and chemical substances erosion, with good corrosion resistance. Excellent resistance to aging performance Synthetic polymer waterproofing membrane has excellent resistance to ozone, UV resistance, weather resistance and other properties, durability and good performance. Bright color, cold paste construction, pollution, excellent waterproof effect.
Poor adhesion, high technical requirements. And the base layer is completely difficult to bond; seams and more joints, easy to produce poor joints and leakage problems, should be used in conjunction with the paint to enhance the integrity of the waterproof layer to improve waterproof reliability. Late shrinkage, most of the synthetic polymer waterproofing membrane heat shrinkage and late shrinkage are large, often make the membrane waterproof layer to produce greater internal stress accelerated aging, or produce waterproof layer was cracked, Edge and other defects.