PTFE Membrane Precision Filter

PTFE Membrane Precision Filter Product Description

PTFE membrane precision filter is a high-precision filtration equipment with polytetrafluoroethylene (PTFE) as the core filter material. Leveraging the unique chemical and physical properties of its material, it is suitable for harsh filtration scenarios across multiple industries, often used in the form of filter elements combined with supporting structures. The detailed product description is as follows from four aspects: core structure, key performance, specification parameters, and applicable scenarios:

1. Core Structure

Filtration Core Layer: The core filter material is a membrane made of polytetrafluoroethylene (PTFE), available in hydrophobic and hydrophilic types to meet different filtration needs for gases and liquids. Some high-end models undergo plasma modification or other treatments to reduce the precipitation of initial pollutants.

Auxiliary Supporting Structure: Most are equipped with polypropylene non-woven materials as the supporting layer, combined with polypropylene inner and outer cages to form the overall framework, manufactured by hot-melt welding technology without residual adhesives or surfactants. The filter membrane is often designed with a pleated structure to expand the filtration area in a limited space and improve filtration efficiency.

Interfaces and Seals: Interfaces include various specifications such as Code3, Code7, and Code8, compatible with different filling and filtration equipment. O-rings are made of corrosion-resistant materials such as EPDM rubber and fluororubber to ensure the sealing performance of the equipment and prevent leakage during filtration.

2. Key Performance

Ultra-Precision Retention: Filtration accuracy ranges from 0.05μm to 10μm, and high-end models for semiconductors can reach ≤20nm. The retention rate for 0.1μm-level particles can reach over 99.9999%, which can accurately intercept bacteria, colloids, nano-scale impurities in liquids, as well as tiny particles and moisture in gases.

Extreme Environment Resistance: It has a wide temperature application range, capable of stable operation in environments from -200℃ to 260℃, and can withstand high-temperature steam sterilization at 121℃ or 134℃. It has excellent chemical compatibility, resistant to strong acids and alkalis with pH 0-14, and long-term immersion in organic solvents such as isopropanol and acetone without degradation or performance attenuation.

Stable and Low-Consumption Operation: The hydrophobic PTFE membrane can prevent moisture accumulation on the filter surface, reducing clogging and microbial growth. At the same time, the fluid resistance is small during passage, with a pressure loss usually below 0.5bar, which can reduce the energy consumption of system operation. Moreover, the material has high mechanical strength with a tensile strength of ≥30MPa, ensuring a long service life under normal use and reducing replacement frequency.

3. Key Specification Parameters

Specifications vary by model; the main general parameters are as follows: The filtration area of a single 10-inch filter element is approximately 0.8m², with other filter element lengths including 20-inch, 30-inch, and 40-inch, and a common diameter of 69mm. The bubble point is ≥0.9bar, and the gas filtration flow rate can reach ≥200 L/min·m² (under 1bar pressure difference). The maximum pressure difference is 0.4MPa at 40℃ and 0.2MPa in the environment of 40-90℃. All products pass 100% integrity testing before leaving the factory.

4. Applicable Scenarios

Pharmaceutical Field: Suitable for terminal filtration of sterile preparations such as injections and vaccines, capable of removing bacteria and pyrogens from medicinal liquids, meeting GMP standards. It can also be used for sterile air intake and breathing exhaust filtration of fermenters in biopharmaceuticals.

Electronic Semiconductor Field: Can filter nano-scale impurities in photoresist diluents and etching solutions in chip manufacturing, as well as particles and colloidal pollutants in ultrapure water systems, meeting SEMI F57 standards and avoiding affecting chip lithography and etching accuracy.

Food and Beverage Field: Used for precision filtration of dairy products, fruit juices, etc., removing bacteria and tiny particles. It is resistant to chemicals for high-frequency cleaning in production lines, meets food-grade safety standards, and does not affect product flavor.

Chemical Industry Field: Suitable for environmental protection filtration of fluorine-containing wastewater, acidic waste gas, etc., as well as impurity filtration of solvents and corrosive slurries, preventing secondary pollution caused by filter element degradation and ensuring the purity of chemical products.