At Micronics, choices of yarn types, weave designs, fiber choices, sewing choices, edge treatments and more are all incorporated into our filter cloths to increase cloth life, improve filter cake release characteristics, and enhance filtration operations.
In addition to yarn fiber materials, yarn designs are an important parameter used to impart the set of specific characteristics needed for your market and application.
Filter cloth yarn designs include:
- Multi-Filament or Continuous Filament Yarns
- Mono-Filament Yarns
- Staple (Spun) Yarns
Multi-filament or continuous filament yarns are produced by the continuous extrusion of synthetic resins. The filament bunches, which have a smooth surface, are twisted together to form the yarn using an “S” or “Z” turn.
Increased twisting will reduce blinding (particle retention within the yarn structure), while also decreasing collection efficiency. Multifilament yarns have high tensile strength and average particle collection efficiency, so filter cake release is average.
Mono-filament yarns are single heavier extrusions. These extrusions are smooth with high tensile strength. In some cases, they are modified with fillers.
Mono-filament yarn has excellent cake release properties and resistance to blinding. Mono-filament yarns have low particle collection efficiency.
Staple (spun) yarns are continuously extruded synthetic filaments chopped into short lengths. These short fibers are combed and twisted using a cotton or woolen manufacturing system (woolen yarn has a higher bulk). These spun fibers have low tensile strength and a large surface area. Particle retention is excellent, though cake release is typically poor.
Contact Us to help you evaluate your process and discuss filter cloth material selection to help optimize your filter press operations. Benefit from Micronics’ expertise.