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Polyvinyl chloride (PVC) waterproofing membrane

Polyvinyl chloride (PVC) water

Polyvinyl chloride (PVC) waterproofing membrane, based on PVC resin as the main raw material, pigments, fillers and various additives, processing of synthetic polymer waterproof material. It has good aging resistance, high strength, elongation, etc., and the use of hot air welding construction, improve the success rate of sealed seams, future development is very fast, great market prospects waterproof material.

★Product type and specifications
According to the composition of products can be divided into homogeneous membrane (Code H), with fiber backing sheet (code L), enhanced coil (code P), glass fiber reinforced inner coil (Code G) within the fabric, glass within the fiber reinforced with fiber backing sheet (code GL)。
Nominal length specifications15m、20m、25m。
Nominal width specifications1.00m、2.00m。
Thickness specifications1.20mm、1.50mm、1.80mm、2.00mm。

Suitable for a variety of industrial and construction roofing, basements, reservoirs, dams, highway tunnels, railway tunnels, bomb shelters and grain storage, waste plants, wastewater treatment construction waterproofing.
Plastic flooring has polyvinylchloride (PVC) and two kinds of PVC floor massive floor sheets.

★Material properties GB12952-2011

No. Project Index
1* The above intermediate tread base resin layer thickness/mm                               ≥ 0.4
2* Tensile Properties Maximum Rally/(N/cm)                            ≥ 120 250 120
Tensile Strength/MPa                              ≥ 10 10
When the maximum tensile elongation/%                         ≥ 15
Elongation at break/%                               ≥ 200 150 200 100
3* Heat treatment size change rate/%                                      ≤ 2 1 0.5 0.1 0.1
4* Flexibility at low temperature -25℃No cracks
5 Impermeability 0.3MPa,120min Impermeable
6 Impact resistance 0.5kg*m,Impermeable
7 Resistance to static loading 20kg Impermeable
8 The seam peel strength/(N/mm)                                   ≥ 4.0Or membrane damage 3
9 Right angle tear strength /(N/mm)                                  ≥ 50 50
10 Trapezoidal tear strength /N                                         ≥ 150 250 220
11 Water absorption(70℃,168h)/%  After soaking  ≤ 4
After airing   ≥ —0.40
12 Thermal aging(80℃) Time/h 672
Exterior No blistering、crack、Stratified、Bonding and holes
The maximum tensile retention/%                           ≥ 85 85 85
Retention of tensile strength/%                           ≥ 85 85
Elongation retention at maximum stretch/%                   ≥ 80
Breaking elongation retention/%                         ≥ 80 80 80 80
Flexibility at low temperature —20℃No cracks
13 Chemical resistance Exterior  
The maximum tensile retention/%                           ≥ 85 85 85
Retention of tensile strength/%                           ≥ 85 85
Elongation retention at maximum stretch/%                   ≥ 85 85
Breaking elongation retention/%                         ≥ 80 80 80 80
Flexibility at low temperature —20℃No cracks
14 Artificial climate accelerated aging time/h 1500h
Exterior No blistering、crack、Stratified、Bonding and holes
The maximum tensile retention/%≥ 85 85
Retention of tensile strength/%≥ 85 85
Elongation retention at maximum stretch/%≥ 80
Breaking elongation retention/%≥ 80 80 80
Flexibility at low temperature —20℃No cracks

Note:Wherein factory inspection items with *

★Construction Technology
1、Cold bonding method

PVC membrane using a dedicated supporting adhesive to stick to cold work will roll on the grass-roots construction method, called the cold bonding method. Waterproof design requirements are different, cold bonding method can be divided into full or partial adhesive bonding method.
(1) full bonding method is PVC membrane bonded on the base of all construction methods.
① construction, the first to pre-shop, the PVC sheet to the discharge line of natural tile primary surface (first not bonded), should be smooth straight, without distorting.
② Coil longitudinal lap width 50mm, and appropriate cut. Transverse butt treatment, the 200 - no composite layer (Class N) 250mm wide use. PVC membrane covering lap welding.
③ when one or more images to the long side of the web fold half (about 10m), from the folds in the grass and brush special adhesive membrane surface, respectively, to be dried to a tack-free gum, will be pre-coated membrane surface collapse paste compaction with a press roll. Then then no additional folded portions folded and continue operating as previously described from the fold, and so firmly compacted paste. Finally, on the seam welded construction.
(2) partial paste membrane. When PVC Stones roll, with the primary coil with a point bonding method or adhesive strips affixed to the substrate.
Sticky point: with the primary coil dot adhesive. Per square meter bonded at least 5 points, each point of an area of ??100mm × 100mm.
Article sticky: as a strip bond with the primary coil. Each piece with the primary coil bonding surface of not less than two, each the width of not less than 150mm.
2, empty shop law
When that is paving PVC waterproofing membrane, with the primary coil binding only within the overall width of four weeks a waterproof layer; the rest of the construction method is not bonded. Construction process empty shop law are as follows:
Grassroots leveling line a clean-up of a bomb laid a pre-web web lap joint welding a special part of a deal with fixed clamping a sealing edge a material acceptance.
First, the pre-laid web reference full bonding method, a longitudinal lap width of 50mm. Secondly, only part of the overall water project four weeks coils could be fully adhered and welded lap joint. Transverse butt handle, on which with 200 ~ 250mm wide non-composite layer (Class N) PVC membrane covering lap, welding.
3, mechanical fixation
Which uses mechanical fastening fixture so that the construction method with the primary coil is connected.
(1) the construction, the first pre-shop, full bonding method can refer to the job. Longitudinal lap width of 100mm, 50mm which make use fasteners, fasteners need to pass through the insulation layer overlying the fixed layer structure.
(2) according to the design and calculation of fixed pitch, with the impact of drilling the first hole, the aperture is slightly smaller than the outer diameter of the fixing screws. After fixing a reinforcing member in place and tighten with an electric screwdriver, later followed by cycle operation can be. For each lap welding, butt transverse process, the 200 ~ 2500mm wide no composite layer (Class N) membrane covered with a lap welding.
4, PVC sheet welding
Longitudinal lap width between the PVC membrane is 50mm, the transverse width of l00mm. When the welding process, the welding nozzle and welding at 45. Angle, roll with the tip parallel to and maintaining a distance of about 5mm, rolling not too fast.
Use the tip of a small 20mm wide tip welding, usually two, welding temperature control in sixth gear, each welded effective width of 15mm ~ 20mm.
Use the tip of a large 40mm wide tip is preferably a welding, welding temperature control in the seventh gear, welding effective width of 25mm.
Welding requirements: to be a pre-weld before welding, the width should not be too wide, so that when the hot air welding and will not overflow and affect the quality of welding. Welding edges shall lava overflows, but not scorch phenomenon.
Welding on the effective width of the web means a release from the magma at the edge, to ensure the effective width of the welding is one of the main indicators of the test weld quality.
After construction according to GB50207-2012 "Roof Engineering Quality Acceptance" or GB50208-2011 "underground waterproof project quality inspection norms" for acceptance.

★Storage and transportation
(One) storage
1, the web should be stored in ventilated place to prevent the sun and rain. Storage temperature should not exceed 45 ℃.
2, different types, different specifications sheet should be stacked separately.
3, flat sheet stacking height should not exceed five, stand up when a single layer stacking. Prohibit contacts with acids, alkalis, oils and organic solvents.
4, under normal storage conditions, the shelf-life of at least one year.
(Two) Transportation
Prevent tipping or horizontal pressure, covered with tarpaulin when necessary during transport.
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