When selecting filter cloth for a filter press, it's essential to consider the basic specifications: fiber material of the yarn, filament type, weave pattern, weight, permeability, fabric attachments, neck design, edge treatment, and more. These elements contribute to the longevity of the filter cloth, improve cake release characteristics, and enhance filtration efficiency.
1. Filter Cloth Materials
Filter cloth for filter presses is typically made from the following materials:
-Polypropylene (PP)
-Polyethylene (PE)
-Polyester fibers
-Nylon
-Other materials
The choice of filter cloth should consider both the fiber and yarn types, as well as the weave type, to suit specific applications and operating conditions.
2. Yarn Design for Filter Cloth
Different yarn designs result in varied characteristics of filter cloth. Common yarn designs include:
1. Multifilament or Continuous Filament Yarns: Produced by continuously extruding synthetic resins. These yarns have high tensile strength and average particle collection efficiency but generally moderate cake release.
2. Monofilament Yarns: Single, heavier extrusions with high tensile strength and excellent cake release and wrinkle resistance, though with lower particle collection efficiency.
3. Staple Fiber (Spun) Yarns: Continuously extruded filaments cut into short lengths, combed, and twisted. These yarns have lower tensile strength, larger surface area, and good particle retention but typically poor cake release.
3. Weave Patterns for Filter Cloth
The weave pattern of the filter cloth affects cake release characteristics, abrasion resistance, resistance to acidic/alkaline environments, and particle retention. Common weave patterns include:
1. Plain Weave: A simple weave with alternating warp and fill yarns. It has high particle retention and low abrasion resistance, with average cake release performance.
2. Twill Weave: Characterized by diagonal lines, allowing for more yarn per unit area without losing fabric stability. It offers uniform cake release and good mechanical strength.
3. Satin Weave: Features a surface almost entirely composed of warp yarns, making it very flexible and easily deformable around most contours. Satin weave provides excellent cake release performance.
4. Compatibility with Filter Plates
When selecting filter cloth, it's crucial to consider the type of filter plates used, such as:
-Plate and frame filter plates
-CGR (Caulked, Gasketed, and Recessed) filter plates
-Recessed filter plates
-Center feed filter plates
-Corner feed filter plates
Choosing the appropriate filter cloth for a filter press requires careful consideration of the application materials, operating conditions, and desired performance characteristics. By evaluating the specifications, materials, yarn designs, weave patterns, and compatibility with filter plates, Yushai can help you select the most suitable filter cloth to ensure efficient and effective filtration.
