Filtration is an important part of our daily lives. From coffee filters to air purifiers to water and car filters, many industries and consumers rely on high-quality filter media that can purify the air they breathe, the water they consume, and make their machines and The vehicle is working normally. In some cases, filter media can protect personal health and safety, and even save lives.
Although we are transitioning from the industrial age to the technological age, the filtration market is still booming and is expected to increase by more than 13 billion US dollars by 2025. In this market, air filtration is expected to grow by 6.6% (to $15.4 billion) by 2025. In terms of liquid filtration, this market is expected to grow to nearly US$3 billion by 2026.
These forecasts are promising for the filtration market, especially for the production of non-woven filter media, providing high-quality products at a lower cost than woven materials.
FILTER THE MEDIA
The filtration of air and water is essential to our health and safety. Filters come in various shapes and sizes, and can be made of woven or non-woven fabrics.
Woven fabrics are made by weaving single strands of materials such as monofilaments or fibrillated yarns on a loom. The production process of non-woven fabrics is to first bond the fibers together in a sequential or random manner, and then bond The layers of the non-woven fabric are bonded with the polymer to form a porous material suitable for filtration
● 6 different methods of producing filter media
The method of manufacturing filter media mainly depends on the type of filtration required. There are six main methods, as follows:
● Carding method
The filter media of the carding machine is traditionally used for masks and filtering edible oil, coolant oil, and milk. Usually resin or thermal bonding is used, and this method is in some cases replaced by other methods described below.
● Wet method
Wet and wet filter media are used in swimming pool filters, coffee filters and high-efficiency particulate air filters. Their production process is similar to that of papermaking. On standard papermaking equipment, a mixture of man-made, natural or glass fiber short fibers forms a paper-like medium.
● Melt blown method
Melt blown filter media is ideal for filtering particulates such as dust, asbestos, and smoke. This is a common type of filter in respirators and is easy to mass produce. It is formed without the use of fibers: instead, molten polymer is blown into a microporous mesh.
● Spunbond method
Spunbond filter media is lightweight and can be used for air and liquid filtration. Just like melt-blown media, they do not need to use fibers, but are spun together from nylon, polyester or polypropylene. In addition, they are light weight and heat resistant.
● Acupuncture
The manufacture of needle punched filter media is a mechanical process that involves the use of barbed felt needles to locate and interlock the fibers in the spunbond or carded web. The three-dimensional structure of the pinhole filter media is an ideal filter for capturing particles on the surface and inside. This is a commonly used type of filtration to clean, for example, influent and sewage.
● Compound method
Non-woven composite is a process in which multiple layers of non-woven materials and polymers are bonded into a composite material that combines the properties of each layer using different technologies. In the process of manufacturing filter media, stratification is ideal for heating, cooling, and ventilating homes, buildings, and automobiles.
Advantage
Compared with other methods, the process of compounding filter media has many obvious advantages. After compounding, the material will become:
● Can withstand the disinfection and cleaning of strong chemicals;
● Good high temperature stability;
● Wear resistance and long life;
● It can be easily made into a variety of porosity, weight and thickness;
● Waterproof, breathable and soft;
● It has a wide range of uses and can be used for any filtering needs;
● Low production cost.
No matter what type of filter media you need, it is important to consider the cost of production, the ease of manufacturing, and the specific characteristics of the final product. Non-woven fabrics have been proven to be a multifunctional material that can be used to make filter media, and can be used in any occasion and field in the filtration industry, whether it is filtering water, air, blood, oil or other substances.
