Product description
Multilayer polypropylene filter bag for high efficiency liquid filtration
The Multilayer Polypropylene Filter Bag is designed for liquid filtration applications where fine particle removal, high contaminant loading and chemical compatibility are essential. The filter bag uses a multilayer depth filtration structure that allows particles to be retained throughout the filter media, resulting in high filtration efficiency and extended service life.
This filter bag is widely used in industrial processes with demanding filtration requirements and aggressive or chemically challenging liquids.
Filtration principle
The Multilayer Polypropylene Filter Bag operates using depth filtration. The filter media consists of multiple polypropylene layers with progressively finer porosity. As liquid flows through the bag, larger particles are captured in the outer layers, while finer particles are retained deeper within the structure.
This graded porosity design provides:
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high particle removal efficiency
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stable pressure behaviour
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high dirt holding capacity
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reduced risk of premature blocking
Depth filtration enables longer operating cycles compared to single layer felt filter bags.
Multilayer media design
The filter bag is constructed using a multilayer polypropylene structure that may include up to five filtration layers. Each layer contributes to filtration efficiency, mechanical stability and contaminant distribution across the media.
The multilayer design:
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distributes contamination evenly
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supports consistent filtration performance
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reduces pressure fluctuations
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extends filter service life
Exact layer configuration depends on the selected filtration grade and application requirements.
Design and construction
Multilayer Polypropylene Filter Bags are manufactured from 100 percent polypropylene fibers using thermally bonded construction methods. The material is free from bonding adhesives, resins, silicones and surface active agents.
Key construction features include:
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multilayer polypropylene depth media
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thermally bonded or welded seams
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stable shape retention during operation
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sealing ring options to minimise bypass
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compatibility with standard industrial bag filter housings
Performance characteristics
Typical performance characteristics include:
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filtration grades suitable for fine to medium particle retention
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removal efficiencies typically exceeding 99 percent for selected grades
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high contaminant loading capacity
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predictable and stable pressure drop
These characteristics make the filter bag suitable for continuous and batch filtration duties.
Material compatibility and hygiene
Polypropylene provides excellent chemical resistance and is compatible with a wide range of industrial liquids, including water based solutions, oils and many chemicals. The material is also suitable for applications where cleanliness and product purity are important.
Selected configurations are suitable for use in food, beverage and pharmaceutical related processes.
Typical applications
Multilayer Polypropylene Filter Bags are commonly used in:
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food and beverage production
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water treatment and pre filtration
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chemical and pharmaceutical processing
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surface treatment and coating processes
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industrial oils and process fluids
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general industrial liquid filtration
Key benefits
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Multilayer depth filtration for high efficiency
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High dirt holding capacity and long service life
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Excellent chemical resistance
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Stable pressure behaviour
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Suitable for demanding industrial environments
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Easy installation and replacement
Configuration and quotation
Multilayer Polypropylene Filter Bags are supplied based on application requirements. Selection parameters include:
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filtration grade
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bag size
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process liquid characteristics
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operating conditions
Filtra International can support correct filter bag selection to ensure optimal performance and service life.