30-inch Polypropylene Filter Cartridge: PCB Printed Circuit Board Chemical Solution Filter Cartridge
Product Introduction
This 30-inch Polypropylene Filter Cartridge is a high-efficiency, large-specification professional filtration component custom-engineered for the purification of chemical solutions in PCB printed circuit board manufacturing processes, crafted with high-purity industrial-grade polypropylene (PP) as the core raw material and adopting advanced precision wire-wound technology with optimized layer density for long-length cartridges. Tailored to the large-flow chemical solution circulation demands and strict cleanliness requirements of PCB production lines—including developer, etching solution, stripping solution and cleaning fluid—the standardized 30-inch structural design perfectly matches the large-capacity filter housings and central filtration units in PCB manufacturing workshops, serving as a core purification barrier in the centralized circulation system of PCB chemical solutions. The all-PP integral structure features excellent chemical compatibility with acidic, alkaline and organic PCB chemical solutions, with no dissolution, material shedding or secondary pollution to the working fluids. It efficiently removes insoluble particulate impurities generated during PCB production and solution circulation, maintains the cleanliness and stable chemical properties of PCB chemical solutions, prevents impurity-induced defects such as circuit pinholes, uneven etching and blurred patterns on circuit boards, and protects large-scale circulation equipment such as solution pumps and spray nozzles while improving the production yield and efficiency of PCB manufacturing lines. The extended 30-inch design maximizes the effective filtration area in a limited installation space, realizing high-flux and continuous filtration for large-flow PCB chemical solution systems.
Filtration Precision
The 30-inch Polypropylene Filter Cartridge is optimized for the impurity removal demand of PCB printed circuit board chemical solutions, with standard filtration precision grades covering 1 μm to 80 μm, including the most commonly used high-demand specifications for PCB manufacturing of 5 μm, 10 μm, 20 μm and 50 μm, which can be targeted to intercept different particle size insoluble impurities in various PCB chemical solutions. Adopting a uniform and dense precision winding process for the 30-inch long cartridge, the filter layer features a highly consistent pore size distribution without pinhole or channeling defects, thoroughly removing metal debris from PCB drilling/routing, resin particles, photoresist residues, colloidal precipitates and abrasive powder from the circulating chemical solutions. This stable and precise filtration performance ensures that the PCB chemical solutions entering the production process meet the strict cleanliness standards of circuit board manufacturing, fundamentally eliminating quality defects of single-sided, double-sided and multi-layer PCBs caused by particulate impurities in chemical solutions.
Flux
Benefiting from the extended 30-inch structural design, large effective filtration area, scientific spiral winding layout and high-permeability industrial-grade PP raw material, this filter cartridge exhibits outstanding high-flux performance under the working condition of large-flow PCB chemical solution circulation filtration. Under the standard operating conditions of 25℃ and 0.2MPa inlet pressure, the initial pure water flux of a single 30-inch cartridge reaches 90-150 L/m²·h, and the actual stable working flux for the purification of PCB chemical solutions remains at 60-100 L/m²·h for a long time. Even in the continuous circulation filtration of high-concentration acidic etching solution and high-viscosity developer, the flux attenuation rate is extremely low, which can ensure the unobstructed circulation and continuous supply of large-flow PCB chemical solutions, and avoid the reduction of PCB production efficiency caused by insufficient filtration flux in the central circulation system of manufacturing workshops.
Salt Rejection Rate
As a dedicated liquid purification component for the filtration of PCB printed circuit board chemical solutions, this 30-inch polypropylene filter cartridge is designed for the efficient interception of insoluble particulate impurities and macromolecular colloids in acidic, alkaline and organic PCB working fluids, and does not have the ion separation and rejection function of reverse osmosis, nanofiltration and other desalination membrane components. Its salt rejection rate is 0%, which means it only retains insoluble solid impurities in the PCB chemical solutions while allowing all soluble metal ions, etching active ingredients, developing reagents, organic solvents and water molecules to pass through the filter layer smoothly. This characteristic is fully in line with the core demand of PCB chemical solution purification, which only needs to remove particulate impurities without changing the ion concentration, chemical composition and functional performance of the solutions, effectively maintaining the stable working efficiency of PCB developer, etching solution and other chemical fluids during continuous circulation and reuse.
Pressure Drop
The product is specially designed with a low-pressure drop optimization structure for the large-flow circulation filtration of PCB chemical solutions, fully considering the pressure loss control requirements of central filtration systems in PCB manufacturing lines with large-diameter pipelines and high-flow pumps. Under the rated working flux and standard temperature conditions, the initial pressure drop of a single 30-inch filter cartridge is only 0.01-0.035 MPa, which minimizes the liquid flow resistance in the purification link of PCB chemical solution circulation and effectively reduces the energy consumption of solution circulation pumps in PCB production workshops. During long-term continuous use, due to the uniform pore size distribution and high impurity-holding capacity of the PP wire-wound filter layer, the pressure drop of the cartridge rises slowly and linearly; the maximum allowable operating pressure drop is 0.15 MPa. When the system pressure drop reaches this value, replacement is recommended in a timely manner to ensure the normal operating pressure of the entire PCB chemical solution central circulation system, and avoid the impact of excessive pressure loss on the solution spray effect and PCB manufacturing process stability.
Molecular Weight Cutoff (MWCO)
This 30-inch Polypropylene Filter Cartridge has a precise molecular weight cutoff range of 70,000 to 280,000 Daltons, which is specially calibrated for the purification demand of PCB printed circuit board chemical solutions. It can effectively intercept macromolecular substances in the PCB working fluids such as colloidal precipitates, macromolecular organic impurities, photoresist polymer agglomerates, metal hydroxide flocs and resin aggregates that may cause PCB manufacturing defects and block production spray nozzles. The strict and reasonable MWCO control ensures that small molecular weight soluble ions, PCB chemical reagents and solvent molecules pass through the filter layer smoothly while realizing the efficient interception of all harmful macromolecular insoluble impurities, and provides reliable molecular-level purification protection for the PCB chemical solution central circulation system.
Membrane Thickness
The PP wire-wound filter layer of this 30-inch cartridge adopts a multi-layer composite spiral winding design with a uniform total effective filter layer thickness of 110-190 μm, and the diameter of the high-purity PP wire is precisely controlled to 0.12-0.28 mm to ensure the consistency of the filter layer pore size and filtration precision for the long-length 30-inch cartridge. The inner and outer sides of the filter layer are equipped with high-strength industrial-grade PP mesh protective layers with a thickness of 70-90 μm each, and the inner skeleton is a reinforced 30-inch special PP support structure with high rigidity, excellent chemical compatibility and pressure resistance, adapted to the structural stress characteristics of long-length filter cartridges in large-flow filtration systems. The moderate and uniform filter layer thickness design not only ensures the high filtration precision and sufficient mechanical strength of the 30-inch cartridge, but also effectively improves the permeability and impurity-holding capacity of the filter layer. The high-quality PP raw material and precise winding process ensure that the filter layer has no material shedding, dissolution or deformation in various acidic, alkaline and organic PCB chemical solutions for a long time, avoiding secondary pollution to the working fluids and meeting the strict purification requirements of PCB printed circuit board manufacturing.
Replacement Cycle
Under the normal operating conditions of PCB chemical solution central circulation systems (solution impurity content ≤25 mg/L, turbidity ≤5 NTU, 24-hour continuous circulation filtration, regular simple backwashing with pure water), the recommended replacement cycle of this 30-inch Polypropylene Filter Cartridge is 3-6 months. If the PCB production load is high (such as mass production of high-density interconnection (HDI) boards and fine-line PCBs) or the solution impurity content exceeds the standard due to excessive drilling/routing dust and equipment wear, the replacement cycle should be appropriately shortened to 1-3 months. In addition, when the pressure drop of the PCB chemical solution purification link reaches the maximum allowable value of 0.15 MPa, or the filtration flux decreases significantly and cannot be restored after backwashing, the filter cartridge should be replaced immediately to ensure the purification effect of PCB chemical solutions and avoid the occurrence of circuit board manufacturing defects caused by excessive impurities in the working fluids.
Features
- Standardized 30-inch long design: Conforms to the universal installation standard of large-capacity filter housings in PCB manufacturing workshops, maximizes effective filtration area in limited space, and adapts to large-flow chemical solution central circulation systems.
- High-purity industrial-grade PP material: All-PP integral structure with excellent chemical compatibility, resistant to acidic etching solution, alkaline developer and organic cleaning fluid in PCB production, no dissolution or secondary pollution.
- Flexible precision filtration: 1-80 μm multi-specification precision options, tailored to the impurity removal requirements of different PCB chemical solutions, realizing targeted filtration for developer, etching solution and stripping solution.
- Super high-flux performance: Extended 30-inch structure with large effective filtration area, high-permeability PP raw material, low flux attenuation rate, meeting the large-flow circulation demand of PCB production line chemical solutions.
- Ultra-low pressure drop & energy saving: Optimized spiral winding structure for long-length cartridges, minimal initial pressure drop and slow pressure rise, reducing the energy consumption of circulation pumps and improving the overall energy efficiency of PCB manufacturing lines.
- Superior mechanical strength: Reinforced 30-inch special PP inner skeleton and high-density protective mesh, resistant to solution flow impact and pressure fluctuation, no deformation or damage under 24-hour continuous large-flow filtration.
- High impurity-holding capacity: Multi-layer composite filter layer with large void volume, can adsorb a large amount of metal debris, resin particles and photoresist residues, extending the replacement cycle under normal PCB production conditions.
- No material shedding: Precision winding process and high-quality PP raw material, no fiber or plastic debris shedding into chemical solutions, ensuring the absolute cleanliness of PCB working fluids.
- Easy installation & maintenance: Standardized structural design, simple disassembly and replacement without special tools, suitable for centralized maintenance of large-scale PCB production line filtration systems, low maintenance cost.
Application Fields
This 30-inch Polypropylene Filter Cartridge is a dedicated liquid purification component for PCB printed circuit board chemical solutions, and is widely used in all core links of PCB manufacturing industry involving chemical solution circulation and purification, covering single-sided, double-sided, multi-layer, HDI and flexible PCB production. In the PCB developing process, it is applied to the centralized circulation purification of alkaline developer solutions (sodium hydroxide, potassium hydroxide systems) in pre-development and main development links, removing photoresist residues and resin particles to ensure clear circuit pattern development. In the PCB etching process, it is used for the large-flow filtration of acidic etching solutions including cupric chloride, ferric chloride and ammonium persulfate etching solutions, intercepting metal debris and colloidal precipitates to realize uniform etching of circuit lines and avoid under-etching or over-etching defects. In the PCB post-treatment process, it is dedicated to the circulation purification of stripping solution and cleaning fluid, removing various solid impurities to ensure the smooth surface of circuit boards and improve the welding performance of PCB pads. It is suitable for large-scale automated PCB production lines, PCB manufacturing industrial parks and professional PCB processing workshops, and can be matched with central filtration units and multi-cartridge filter housings to realize centralized purification of PCB chemical solution systems. In addition, it can also be applied to the filtration and purification of chemical solutions in the production of FPC (flexible printed circuit) and PCB substrate materials with similar physicochemical characteristics and purification requirements.
Conclusion
To sum up, this 30-inch Polypropylene Filter Cartridge is a high-performance, large-specification professional filtration component custom-developed for the purification of PCB printed circuit board chemical solutions, perfectly meeting the large-flow circulation characteristics and strict cleanliness requirements of PCB manufacturing processes. Its core advantages of standardized 30-inch long design, excellent chemical compatibility, super high-flux performance, ultra-low pressure drop and high impurity-holding capacity perfectly solve the pain points of insufficient filtration flux, high energy consumption, chemical solution pollution and PCB manufacturing defects in large-scale PCB production lines. The all-PP structural design ensures no secondary pollution to PCB developer, etching solution and other chemical solutions, effectively maintains the stable chemical properties and absolute cleanliness of the working fluids, and fundamentally eliminates quality defects such as circuit pinholes, uneven etching, blurred patterns and pad contamination caused by particulate impurities. As the core purification barrier of PCB chemical solution central circulation systems, it not only improves the production yield and surface quality of various PCBs, but also protects large-scale circulation equipment such as solution pumps and spray nozzles from impurity wear and blockage, extends the service life of production equipment and the reuse rate of chemical solutions, and effectively cuts down the raw material and maintenance costs of PCB manufacturing enterprises. With the characteristics of perfect matching with large-capacity filter housings, easy installation and maintenance, flexible precision selection and high cost performance, it has become an indispensable core filtration component for the chemical solution circulation systems of large-scale PCB production lines, providing a stable, efficient and large-flow liquid purification solution for the high-quality and high-efficiency production of the PCB manufacturing industry.
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