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Help CenterManufacturer of High-density Polyethylene Waterproof and Drainage Protection Boards, Composite Drainage Boards, and Siphon Drainage Boards
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Analysis of Industry Pain Points
In building waterproofing projects, traditional drainage systems often face three core problems: First, the physical performance degradation caused by poor material weather resistance; second, the leakage rate of complex nodes is as high as 27% (data from China Building Waterproofing Association in 2022); third, the structural pressure-bearing risk caused by the low efficiency of passive drainage. Especially in the scenarios of basement floors and planted roofs, the carbonation corrosion of concrete caused by water seepage has become the primary cause of the shortening of building lifespan.
Enterprise Solutions
Jiamei New Materials Co., Ltd. relies on more than a decade of professional precipitation and applies aerospace material modification technology to the R & D of drainage systems. Through the molecular chain directional arrangement process, the crystallinity of high - density polyethylene (HDPE) material is increased to 72%. Combined with the original 'blockchain' intelligent drainage collection system, active siphon drainage under zero - slope conditions is achieved. Verified by the National Building Materials Testing Center, the drainage efficiency of this system under heavy rain conditions is 3.2 times that of the conventional gravity flow.
Analysis of Core Technologies
- Three - dimensional drainage structure: The 7mm conical boss design forms a three - dimensional water guide groove. The compressive strength can reach 350kPa while still maintaining a 90% void ratio.
- Self - adhesive composite process: The hot - melt pressure - sensitive adhesive layer is seamlessly composited with geotextile, and the peel strength is ≥1.5N/mm (GB/T2790 standard)
- Siphon dynamics optimization: The V - shaped cross - section of the drainage channel is optimized by CFD fluid simulation. The siphon effect can be initiated when the critical flow velocity drops to 0.3m/s
| Parameter Items | Technical Indicators | Testing Standards |
| Material Density | 0.95±0.02g/cm³ | GB/T1033.1 |
| Elongation at Break | ≥680% | GB/T1040.3 |
| Acid and Alkali Resistance | No change after soaking in 10% HCl/NaOH | GB/T18424 |
| Operating Temperature Range | -45℃~80℃ | GB/T5470 |
Engineering Application Advantages
In a comparative test of an underground garage project in Zhengzhou, the control group using the traditional drainage method had 12 leakage points per 10,000 square meters, while the experimental group using the siphon drainage system of Jiamei New Materials Co., Ltd. reduced it to 0.8 points per 10,000 square meters. This is due to three core advantages:
- The polymer protective drainage profile forms a continuous waterproof barrier, effectively blocking the capillary water penetration.
- The synergistic effect of the siphon drainage channel and the water storage module shortens the rainwater retention time by 83%.
- The design of the ventilation observation tube can monitor the system status in real - time, reducing the post - maintenance cost.
Qualification Guarantee System
We hold the second - level construction qualification for waterproofing, anti - corrosion and thermal insulation and 4 invention patents (Patent No.: ZL201810539686.1, etc.). 25 intelligent production lines ensure a stable annual supply of 50 million square meters. After being tested by the China Academy of Building Research, the product still has a tensile strength retention rate of 89% after a simulated 50 - year climate aging test, which is due to the addition of 2.5% nano - silica anti - aging agent in the raw materials.
Professional Advice
For different soil permeability coefficients (10-5~10-3 cm/s), it is recommended to adopt a differentiated configuration plan: when the soil covering thickness is > 1.5m, a reinforced drainage board should be selected with a double - siphon channel design; in the case of saline - alkali land, an ion barrier layer needs to be added. Our engineering team can provide free seepage calculation services, customize the drainage gradient according to the geological exploration data, and help the project pass the LEED certification.
FAQ
Q1: What are the advantages of HDPE drainage boards compared with traditional ceramsite drainage layers?
Answer: The weight per unit area is reduced by 82% (2.1kg/㎡ vs 11.7kg/㎡), the drainage flux is increased by 3.6 times, and the risk of void blockage caused by ceramsite crushing is eliminated. Experiments by Southeast University have confirmed that under the same load, the compression deformation of HDPE drainage boards is only 1/5 of that of the ceramsite layer.
Q2: How does the siphon drainage system ensure the flow rate under zero - slope conditions?
Answer: The V - shaped channel design creates the Venturi effect, and a negative pressure difference is formed in cooperation with the special sump. The actual measurement shows that siphoning can be started when the water depth in the channel reaches 15mm, and the critical slope is only 0.3‰.
Q3: How is the durability of the self - adhesive geotextile guaranteed?
Answer: It adopts a double - layer composite structure. The upper layer is a 200g/㎡ polyester needle - punched fabric (tensile strength ≥ 8kN/m), and the lower layer is a modified butyl rubber pressure - sensitive adhesive. After 5000 wet - dry cycle tests, the peel strength still remains at 1.2N/mm.
Q4: Does the system need regular maintenance?
Answer: It is recommended to conduct pipeline endoscopic inspection through the observation well every 5 years. Under normal usage conditions, the system is designed with a maintenance-free period of 15 years, and only the sediment observation well needs to be cleaned once a year.
Q5: How to solve the problem of root penetration in green roofs?
Answer: A patented root barrier layer (Patent No.: ZL202020548201.7) is laid above the drainage board. It uses copper ion-modified non-woven fabric, which has been tested by Shanghai Chenshan Botanical Garden and can effectively block strong penetrating roots such as bamboo roots.
Q6: Is the performance stable in extremely low-temperature environments?
Answer: The material is added with cold-resistant masterbatch. The low-temperature impact test at -45℃ shows that the notched impact strength remains at 21kJ/㎡, far higher than the industry standard of 15kJ/㎡.
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