Mesh screen filters have an open-hole structure that enables them to capture and collect solid particles from liquid or air streams. Available in numerous designs and materials, they serve as a versatile filtration and skimming solution for many industrial, commercial, and recreational applications.
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At Jason Mills, we provide standard and custom knitted mesh fabrics in a range of weights, sizes, colors, and finishes to suit different customer needs. Both our nylon and polyester mesh fabric solutions possess distinct benefits that make them suitable for filtration.
The performance of a mesh filter is highly dependent on the fibers and yarns used to make it. Nylon and polyester are synthetic polymers often used to create mesh screens for filtration or skimming devices. While both are flexible, durable, and lightweight, they each have distinct benefits and limitations that impact their suitability for certain applications.
Polyester is a synthetic polymer formed by a chemical reaction involving alcohol, carboxylic acid, and a petroleum byproduct. The resulting fibers can be stretched and aligned to form yarn with the following properties:
High strength and durability
Excellent dimensional stability
Hydrophobic surface
Resistance to acids/alkalis, corrosion, heat/fire, mold/mildew staining, ultraviolet light, and wear
Easy sewing and cleaning requirements
These advantageous characteristics make polyester mesh suitable for a wide range of applications. Whereas the hydrophilic nature of nylon fibers causes them to absorb water, the hydrophobic nature of polyester fibers allows them to repel moisture. As a result, polyester mesh screens will dry faster when exposed to wet conditions. Additionally, polyester is more resistant to heat and UV rays than nylon, making filter mesh made from it a more suitable solution for outdoor environments.
Polyester mesh generally has a slightly rougher feel than nylon mesh. However, a higher filament count can create a lighter, drapier material. It also tends to be less tolerant of stretching and bending than nylon mesh, which limits its use in applications where elasticity is a priority.
Nylon is a synthetic plastic created by extracting and heat treating carbon-based compounds from organic matter. It is capable of being extruded into strands of various sizes and thicknesses to suit different applications. Key properties include:
High tensile strength
Light weight
Elasticity and flexibility
Resistance to acids, alkalis, corrosion, dust, temperatures, and wear
Hydrophilic and antimicrobial (when combined with silver ion) surface
Soft, smooth feel
Easy cutting, dyeing, and cleaning requirements
Nylon fibers can be knitted into durable mesh suitable for different straining, sieving, and filtering applications. The mesh openings can be constructed in a variety of shapes (such as round, rectangular, or honeycomb) and thicknesses (ranging from thin, lightweight drapes or netting to thick, heavy-duty nets and pads).
In addition to its availability in many designs and configurations, nylon mesh offers a number of other key advantages over alternative filter mesh options. For example, its strength and durability make it a great choice for long-term use. Additionally, its smooth surface facilitates the removal of filtered solids, making it an effective and efficient solution for pool filters and skimmers.
However, unlike polyester fibers, nylon fibers absorb and retain water, which causes nylon mesh screens to stretch and expand in wet or humid environments. Nylon mesh also tends to degrade more quickly than polyester when exposed to direct sunlight, making it better suited for applications that are less exposed to weathering elements.
Nylon and polyester filter mesh are used in filtration solutions for numerous industrial, commercial, and recreational applications. For example, they are integrated into pool filters and skimmers, where they help maintain a clean and safe environment for swimmers by capturing and removing debris and other solid contaminants.
Other common applications of nylon and polyester filter mesh include:
Dust collection and separation
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Sifting and milling
Fuel and oil filtration in automotive and aerospace systems
Filtration systems in refrigerators, dryers, and other appliances
Filtering tests in laboratory applications
Infusion and transfusion filters in medical applications
Application-specific requirements and environmental factors will dictate which type of filter mesh is most appropriate for an application. For example, nylon&#;s smooth and soft surface makes it uniquely suited for sensitive medical and diagnostic applications, whereas polyester&#;s acid resistance and hydrophobicity make it preferable for applications involving acidic substances or long-term water exposure.
At Jason Mills, we offer an extensive selection of polyester and nylon mesh suitable for filtration applications. They are available with opening apertures of less than 1/16 inch and in weights ranging from 2 to 11 ounces.
Filter Mesh, Microns and Inline Filter Choice
Filtration is filtration right? Well, like all things technical it is not as simple as that when it comes to particle separation. The easiest way to start thinking about inline filter choice is by looking first at filter mesh. In this post I want to give you a simple mental picture of what filter mesh or screen is and an overview of how different sizes of mesh are described.
Filtration Basics
Fishing net is basically a filter used to separate fish from water. Like fishing net, filter mesh is woven metal wire or plastic strands which stops particles that are too large from passing through openings in the mesh. Filter mesh is considered a surface filtration type of material or media because particles are captured on the surface of the mesh.
What a surface filter can do:
Why Size Matters
Just as a fish net used to catch salmon cannot catch minnows, you need to choose a useful filter mesh. When choosing a mesh, you need to remember that mesh numbers and mesh sizes are not the same thing.
Mesh Number
You will often see the US Standard Mesh number used to describe mesh size. The US Standard Mesh number is the number of openings per inch of mesh. The larger the mesh numbers the greater the number of openings per inch and the smaller the openings in the mesh. Convert US Standard Mesh to microns, inches and millimeters.
Mesh Size
Mesh size is the actual size of the openings in the mesh. This is usually given in fractional inches and millimeters and/or microns. A micron (μm) is one thousandth of a millimeter or one twenty-five thousandth of an inch.
Strand Diameter
Descriptions of mesh include the diameter of the strands used in the weave. Mesh made with the same mesh number but made with thicker strands will have smaller mesh openings.
For more help understanding the relationship between mesh number, mesh size and microns check out our Mesh and Micron Sizes resource as well as this online mesh calculator.
How Much is Too Much?
The higher the mesh number the more surface area is taken up just by the strands. The surface area of the mesh openings as a percentage of the total surface area of the mesh is the Percent Open Area (POA). A higher POA means a greater flow.
Well, there you have it; a brief outline of some of the technical issues that come up when describing filter mesh. You need to keep these points in mind when thinking about filter mesh as it relates to the selection of the proper in-line filter for your application:
Look for our upcoming blog article for a discussion of chemical compatibility:
How to Choose an Inline Filter &#; Chemical Compatibility
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