I. Product Definition

Permeable Membrane ( Permeable Membrane ) is a membrane material with selective permeability, often used in water treatment, gas separation, biopharmaceuticals, food processing, and other fields. The most common is the reverse osmosis membrane ( RO membrane), widely used in seawater desalination, pure water preparation, and industrial wastewater treatment.

II. Product Advantages

High-efficiency filtration: Effectively removes dissolved salts, heavy metals, organic matter, and microorganisms from water.

Energy-efficient and environmentally friendly: No heating required, minimal chemical agents, low energy consumption, meeting the requirements of green and sustainable development.

Long service life: High-quality membrane elements can last 3-5 years, with high cost-effectiveness.

High degree of automation: Compatible with intelligent control systems, facilitating remote monitoring and management.

Low maintenance cost: Reasonable structural design, easy cleaning, and relatively low operating costs.

III. Product Features

High selectivity: Only allows substances below a specific particle size or molecular weight to pass through.

Diverse membrane materials: Including polyamide ( PA ), cellulose acetate ( CA ), polyvinylidene fluoride ( PVDF ), polyacrylonitrile ( PAN ), etc.

Modular structure: Standard membrane module design, facilitating replacement and expansion.

Strong adaptability: Can be used for the treatment of different water qualities (such as brackish water, seawater, surface water, and wastewater).

Automatic cleaning design: Backwashing and chemical cleaning are available to extend the service life.

IV. Main Technical Parameters (Example using RO membrane)

Parameter   Numerical Range

Desalination rate   ≥ 99%

Water flux  2000 - 6000 GPD (Gallons / /day)

Operating pressure  1 - 6.9 MPa 

pH Tolerance range  3 - 10 (Expandable during cleaning to 2 - 11 )

Maximum operating temperature  45 ° C 

Recovery rate  50% - 85% (System design related)

V. Application Range

Water treatment industry: Potable water purification, industrial pure water, ultrapure water preparation, seawater desalination and brackish water desalination

Environmental engineering: Industrial wastewater reuse, electroplating wastewater, dyeing wastewater treatment, landfill leachate treatment

Food and beverage: Juice concentration, milk desalination, deproteinization, soy sauce concentration, etc.

Biopharmaceuticals: Hemodialysis, medical pure water preparation

Chemical industry: Solvent recovery, molecular separation and concentration

VI. Brief Production Process

The manufacture of permeable membranes usually includes the following steps:

Membrane material preparation: Select and proportion polymer materials according to the membrane type (such as reverse osmosis membrane, ultrafiltration membrane, etc.).

Membrane solution preparation and coating: Form a membrane layer through processes such as dip coating, casting, or phase inversion.

Crosslinking reaction: Reverse osmosis membranes often use interfacial polymerization technology to form a dense polyamide layer.

Roll-up assembly: Roll the membrane sheet and support layer into a spiral assembly (membrane element).

Performance testing: Test key indicators such as desalination rate and water flux to ensure that they meet the standards before packaging and shipment.

VII. Market Competitive Advantages

High technical barriers: Core raw materials and manufacturing technologies are controlled by a small number of companies.

High Brand concentration: Dow, Hydranautics, Toray, GE 、 LG and other international giants dominate the market, while domestic brands such as Shihan, Huitong, and Suez are emerging.

Wide application drives demand growth: Water scarcity and stricter environmental regulations are driving rapid market growth.

Rapid innovation and iteration: New technologies such as nanofiltration membranes, forward osmosis membranes, and membrane distillation are gradually maturing, expanding application boundaries.

VIII. Future Development Trends

Membrane material upgrades: Developing towards high flux, pollution resistance, and long lifespan, such as graphene membranes, ceramic membranes, and biomembranes.

System integration and intelligence: Combining IoT ，big data and AI Improving the efficiency of membrane system operation and remote maintenance capabilities.

Green manufacturing: Focusing on the environmental friendliness and sustainability of the production process, using degradable or recyclable materials.

Accelerated domestic substitution: Chinese domestic Brands are gradually breaking through technological barriers, achieving independent control of high-end membranes.

Multi-scenario application integration: Promoting the expansion of membrane technology from single water treatment to cross-border expansion in multiple fields such as food, pharmaceuticals, and energy.