Reliable Water Filtration: Find the right Nonwoven
In many industrial processes, clean water is a prerequisite for safe operation and consistent quality. Filter media must effectively treat processed waters, reliably retain particles to protect downstream machine components. At the same time, they must withstand chemical, thermal and mechanical stresses while maintaining a consistent rate of flow.
Technical nonwovens provide a broad range of options for achieving all this. The nonwoven's structure and polymer composition can be specifically tailored to the filtration task at hand for optimal results. Whether used as a functional layer in a multi-layer filter system or as a filtering nonwoven for water or other liquids, the material structure is crucial.
What properties are essential for nonwovens in water filtration?
The performance of a filter medium for water filtration is primarily determined by its fiber structure, pore size, basis weight, and material thickness. These parameters influence particle retention, flow rate, and stability during use.
The meltblown technology is particularly effective for producing fine fiber structures. Within this process, a polymer is melted and processed into fine fibers, creating a nonwoven structure with ideal conditions for efficient particle separation. Both the fiber structure and material composition can be tailored to the specific requirements of each application.
The choice of polymer is equally crucial. For specific applications, specialty polymers such as PA6 and PA12 are the right choice. PA6 is inherently hydrophilic, abrasion-resistant and mechanically robust, making it particularly well suited to aqueous applications. PA12 absorbs very little water, is hydrolysis-resistant and has a highly wettable surface. As a result, the filter medium retains its dimensional stability and functionality even under challenging liquid conditions.
How Polymers turn into Finest Fiber Structures:
Discover Sandler's Competence in Meltblown.
Are there any key applications for nonwovens in water filtration?
Filter media are used to remove particles from liquids, ensure specific liquid properties, and protect equipment. Typical applications include water and environment technology as well as industrial production processes.
In process water filtration, nonwoven fabrics have proven effective and as integral components of multi-stage systems. They reliably trap particles, reduce the load on subsequent filtration stages, and protect sensitive equipment. Meltblown media offer versatile solutions for a range of applications, including the treatment of drinking water, industrial water, and process water. The appropriate design depends on several factors, such as particle size, flow rate, temperature, and water composition. Other potential applications include the food industry as well as the medical and pharmaceutical sectors. These industries are subject to specific legal and regulatory requirements. The raw materials, material composition and processing methods must therefore be tailored to the specific application and validated accordingly.
In addition to water, industrial nonwovens are also suitable for other industrial liquids, such as brine or chemically contaminated media. The key requirement is always the selection of a suitable polymer.
Filter Media for Air, Water, and other Liquids:
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How do nonwoven filter media from Sandler contribute to water quality?
Reliable water filtration starts with an analysis of the application. Which particles need to be removed? What flow rate is required? What temperatures, liquids and mechanical stresses must the filter withstand?
Based on this, Sandler develops filter media in which the polymer, fiber structure, basis weight and dimensions are carefully coordinated. For demanding applications, our polyniq® development platform provides additional options by combining meltblown technology with selected specialty polymers, such as PA6 for hydrophilic applications, or PA12 for applications like water or hydraulic filtration.
This way, Sandler creates a filter nonwoven that retains defined particles, allows for a consistent flow rate, and remains functional under the specified process conditions. In a suitably designed filter system, it contributes to consistent filter performance and defined water quality.
Where Standard Media reach their Limits:
Learn more about polyniq® for specific filter solutions.
Custom Filter Media for individual Applications
No filtration job is like the other. Sandler supports development from design to validation and series production, drawing on more than two decades of meltblown experience, a broad polymer portfolio, and the continuous collaboration with clients.
It's not the technically most sophisticated solution that matters, but rather the filter media and its ability to work effectively and economically within the parameters of the application. This results in custom-designed filter media for water filters and industrial liquid filtration–precisely engineered, reliably manufactured and designed for demanding processes.
