In the current era of rapid development of infrastructure projects, the stability of drainage systems directly determines the service life and safety performance of the project. Whether it is greening the roof of underground parking garages, soft foundation treatment of highways, sponge city construction, or anti-seepage of landfills, drainage boards are the core drainage components. The covering cloth used in conjunction with them – polyester spunbond hot-rolled cloth specifically for drainage boards – has broken through the limitations of traditional materials with its core advantages of “lightweight and high strength”, becoming the “new favorite” in the infrastructure field and widely used in various key projects, highly favored by the industry.
As the “protective cover” and “functional auxiliary” of drainage boards, the polyester spunbond hot-rolled fabric specially designed for drainage boards is not a simple adaptation of ordinary geotextiles, but a high-performance matching material tailored to the usage scenarios and functional requirements of drainage boards through precise formula and process optimization. It is made from high-purity polyester chips through precision processes such as spunbond molding and hot rolling reinforcement. It not only perfectly matches the structural characteristics of the drainage board, but also maximizes the synergistic effect of drainage, filtration, and protection, becoming a key link in improving the efficiency of the drainage system.
Lightweight and high-strength, solving the pain points of traditional materials
Traditional drainage board matching fabrics often use ordinary needle punched geotextiles, which generally have problems such as heavy weight, insufficient tensile strength, easy damage, and complicated construction. Especially in scenarios such as high-altitude laying and soft foundation construction, it not only increases the construction burden, but also easily affects the stability of the drainage system due to material loss. The core breakthrough of polyester spunbond hot-rolled fabric for drainage boards lies in the dual support of “lightweight” and “high strength”, accurately solving industry pain points and demonstrating unique advantages.
Highlight 1: Lightweight and convenient, greatly improving construction efficiency
The most intuitive advantage of polyester spunbond hot-rolled fabric for drainage boards is its “lightness”, with a weight that can be flexibly controlled between 15-280g/㎡. Compared to traditional needle punched geotextiles, the weight is reduced by 30% -50%. Even in large width (up to 3.2 meters or less) laying scenarios, there is no need for large lifting equipment, and manual labor can be easily carried and laid, greatly saving labor costs and construction time.
In the greening project of underground garage roof, the advantages of lightweight characteristics are particularly prominent due to limited construction space and the inability of large equipment to enter the site. Construction personnel can quickly lay and overlap without the need for additional load-bearing support, which not only reduces the construction process, but also avoids additional loads on the roof structure caused by heavy materials. According to industry data, the use of this type of lightweight hot-rolled fabric can increase the construction efficiency of drainage board laying by more than 40% and shorten the construction period by 20% -30%, especially suitable for the needs of urgent key projects. At the same time, its texture is soft and can be bent freely, which can perfectly fit the concave convex structure of the drainage board and the complex construction terrain, avoiding wrinkles and damage during the laying process and ensuring the integrity of the coverage.
Highlight 2: High strength and durability, building a solid defense line for the drainage system
‘Light’ does not mean ‘weak’. The polyester spunbond hot-rolled fabric specifically designed for drainage boards achieves high-strength performance breakthroughs through advanced hot rolling technology and high-quality raw materials while being lightweight. It adopts a tubular airflow stretching process, with fiber fineness controlled between 0.75D-1.5D. After hot rolling and solidification, the fiber bundles form a micro melting dot matrix combination, and the overall structure is tight and firm. The longitudinal fracture strength can reach 35kN/m or more, and the transverse fracture strength is ≥ 30kN/m, far exceeding traditional needle punched geotextiles. It can effectively resist the pulling and friction during construction, as well as the losses caused by soil pressure and water flow impact in the later stage.
In addition, the material also has excellent weather resistance and corrosion resistance. The raw material is AA grade polyester chips produced by large domestic polyester factories, with high purity and regular molecular chains. It can be used for a long time in extreme environments ranging from -25 ℃ to 70 ℃, and can maintain more than 90% of its initial strength in strong acid-base environments with pH values of 2-12. The service life can reach more than 30 years, effectively avoiding the problems of drainage system failure caused by traditional materials that are prone to aging, powdering, and damage. In the soft foundation treatment project of the Hangzhou Bay Cross Sea Railway Channel, a special polyester spunbond hot-rolled fabric with a tensile strength of 45kN/m was used for drainage boards, which successfully resisted the tensile force caused by soft foundation settlement, ensured smooth drainage channels, shortened the soft foundation treatment period by 40%, and reduced material costs by 28%.
Not only “light” and “strong”, but also fully adapted to various functions
The reason why polyester spunbond hot-rolled fabric for drainage boards is highly favored is not only because of its core advantages of lightweight and high strength, but also because of its perfect coordination with drainage boards, which has multiple functions such as filtration, protection, and air permeability, fully ensuring the stable operation of drainage systems and adapting to various complex infrastructure scenarios.
Function 1: Filter and guide drainage to prevent blockage of drainage channels
The core requirement of a drainage system is “unobstructed drainage”, and blockage is the main hidden danger that affects drainage efficiency. The polyester spunbond hot-rolled fabric specifically designed for drainage boards has a uniform pore structure with a porosity rate of up to 70% -80%. It not only allows moisture to quickly penetrate into the water channels of the drainage board, but also effectively blocks soil particles, sediment, and other impurities from entering the interior of the drainage board and causing blockages, ensuring long-term smoothness of the drainage system.
Its permeability has been strictly tested, and the vertical permeability coefficient can reach 0.5-1.0cm/s, which meets the GB/T17639-2023 standard. The horizontal drainage efficiency is 3-5 times higher than that of traditional gravel layers. In sponge city construction projects, this material works synergistically with drainage boards to quickly drain surface water and filter impurities, avoiding blockages in drainage pipes and helping to achieve the goal of “infiltration, retention, storage, purification, utilization, and drainage” in sponge city construction. Currently, it has become the preferred supporting material for sponge city projects.
Function 2: Protective buffering, extending the service life of drainage boards
During the construction and use of drainage boards, they are susceptible to compression from backfill soil and punctures from sharp debris, resulting in damage and water leakage. The special polyester spunbond hot-rolled cloth for drainage boards can serve as a “protective layer”, effectively buffering soil pressure, blocking punctures from sharp objects, and protecting the structural integrity of drainage boards.
At the same time, its good flexibility and extensibility can adapt to small deformations of the foundation, avoiding the detachment of drainage boards and coverings due to foundation settlement, ensuring the continuity of the drainage system. In underground side walls, tunnel drainage and other scenarios, this material can effectively protect the drainage board from wall compression and debris wear, extending the service life of the drainage board by more than 50% and significantly reducing maintenance costs in the later stage. In addition, it can be used in combination with the waterproof layer to achieve a dual waterproof and anti-seepage effect, isolating gas and preventing oxidation, further enhancing the lifespan of the waterproof system.
Function 3: Environmental protection and energy conservation, in line with the concept of green infrastructure
At present, green infrastructure has become the mainstream trend of industry development, and the production and use of polyester spunbond hot-rolled fabrics for drainage boards fully practice environmental protection concepts. Its production adopts fully automated hot rolling technology, abandons traditional adhesive methods, does not add any organic additives, has no dust or odor, and eliminates the risk of plasticizer precipitation polluting soil and groundwater in the later hydrological cycle. It has obtained China Environmental Labeling Product Certification and EU REACH Regulation Compliance Declaration.
At the same time, the materials can be recycled and reused, with no waste generated during the construction process. The energy consumption per unit product is reduced by 18% compared to traditional materials, and the wastewater reuse rate is increased to 85%, perfectly meeting the “dual carbon” goals and green infrastructure requirements. In environmental protection projects such as landfills and mine restoration, its environmental characteristics and corrosion resistance advantages are highlighted, which can achieve efficient drainage and avoid damage to the surrounding ecological environment, achieving the coordinated development of engineering construction and ecological protection.
Multi-point flowering, empowering various infrastructure scenarios
With the advantages of light weight, high strength, comprehensive functionality, environmental friendliness and durability, polyester spunbond hot-rolled fabric for drainage boards has been widely used in various infrastructure projects, becoming the “golden partner” of drainage boards, and the market demand continues to rise. According to industry reports, the market size of China’s polyester drainage board fabric has exceeded 12 billion yuan in 2023, and is expected to climb to over 15 billion yuan by 2025. Among them, the proportion of polyester spunbond hot-rolled fabric for drainage boards has been increasing year by year, becoming the core driving force for market growth.
In the field of municipal engineering, in scenarios such as underground garage roof greening, roof planting, and underground pipe gallery drainage, this material greatly improves construction efficiency due to its lightweight and convenient advantages, while ensuring the stability of the drainage system; In the field of transportation infrastructure, such as soft foundation treatment for highways, drainage for railway roadbeds, and slope protection for highways, its high-strength weather resistance can withstand complex environmental tests, ensure smooth drainage, and help stabilize roadbeds; In the field of environmental engineering, in scenarios such as landfill anti-seepage and drainage, mine restoration, and sewage treatment, its corrosion-resistant and environmentally friendly characteristics perfectly adapt to harsh environmental requirements; In the field of water conservancy engineering, this material can achieve efficient drainage and soil protection in projects such as river regulation, reservoir anti-seepage, and saline alkali land improvement, improving engineering quality.
From sponge city projects along the eastern coast to highway construction in the central and western regions, from underground space development in cities to rural water conservancy renovation, the presence of polyester spunbond hot-rolled fabrics specifically designed for drainage boards is ubiquitous. Domestic leading enterprises such as Dongfang Yuhong and Hongxiang New Materials are increasing their R&D and production investment in this type of product, further optimizing product performance, and expanding application scenarios.
Market preference: Quality wins, broad prospects
With the continuous improvement of drainage system requirements in infrastructure projects, traditional supporting materials are no longer able to meet the high quality, high efficiency, and green construction needs. However, the polyester spunbond hot-rolled fabric for drainage boards, with its core advantages of “lightweight and high strength”, as well as multiple functions such as filtration, protection, and environmental protection, perfectly fits the industry development trend and is favored by construction units and building materials enterprises.
Compared to traditional materials, it can not only improve construction efficiency and reduce construction costs, but also extend the service life of drainage systems and reduce later maintenance investment, with significant cost-effectiveness advantages. Meanwhile, with the continuous innovation of technology, new products such as degradable modification and intelligent monitoring are gradually emerging. It is expected that the market penetration rate of new environmentally friendly products will exceed 15% by 2025, further promoting industry upgrading.
In the future, with the continuous promotion of national level strategies such as new urbanization construction, sponge city pilot expansion, and transportation network encryption in the 14th Five Year Plan, the market demand for polyester spunbond hot-rolled fabrics for drainage boards will continue to grow. On the basis of maintaining its lightweight and high-strength advantages, it will further optimize processes, improve performance, expand more segmented application scenarios, provide more efficient, stable, and environmentally friendly drainage solutions for various infrastructure projects, and continue to support the high-quality development of green infrastructure, becoming an indispensable core material in the infrastructure field.
Dongguan Liansheng Non woven Technology Co., Ltd. was established in May 2020. It is a large-scale non-woven fabric production enterprise integrating research and development, production, and sales. It can produce various colors of PP spunbond non-woven fabrics with a width of less than 3.2 meters from 9 grams to 300 grams.
Post time: Apr-09-2026