The global market size of air compressors is approximately 44 billion US dollars in 2023. Chinese domestic enterprises are continuously improving their production capacity and manufacturing level, and the domestic process is continuously advancing. Air compressor filter elements, as key accessories, occupy an important position in the industrial chain.
I. Main Raw Materials of Air Filter Elements
The core material of air filter elements is specially treated filter paper, whose performance directly determines the filtering effect and service life. Currently, mainstream air filter elements are made of imported HV company and Korean Ahlstrom pure wood pulp filter paper. These filter papers have the following technical characteristics:
Physical Parameters: Paper weight is 127 ± 6 g/m², thickness ≥ 0.36mm, corrugation depth 0.1 – 0.3mm, air permeability at △P = 200Pa condition ≥ 580L/m²·s, maximum pore size ≤ 75μm.
Filtering Performance: Filtering accuracy is 5 – 10μm, filtering efficiency reaches 98%, effectively intercepting solid particles in the air. The multi-layer pleated structure design increases the filtering area by 5 – 8 times, and the pollutant capacity is significantly improved.
Durability Characteristics: Standard design service life is 2000 hours, and in an environment with good air quality, it can be extended to 3000 hours. The filter paper is treated with resin, with a resin content of approximately 18%, giving it excellent water resistance and dimensional stability.
II. Main Raw Materials of Oil Filter Elements
The core filtering medium of oil filter elements is glass fiber material. Its technical characteristics are as follows:
Fiber Structure: Using ultra-fine glass fibers with diameters of 1 – 20μm, forming a filtering layer through a three-dimensional interlaced structure, with a pore size of 30 – 80μm. This structure can intercept 99% ≥ 5μm oil droplets, with a measured filtration efficiency of 99.9%.
Temperature Resistance Performance: The glass fibers themselves can withstand 555℃ high temperature, but in the application of filter elements, the working temperature can reach 120℃ under the support of stainless steel frame. It has strong chemical corrosion resistance and can resist acid and alkali solutions and other non-organic solutions, suitable for the filtration of various lubricating oils and hydraulic oils.
Mechanical Properties: The fracture elongation rate is increased to 3.5%, 42% higher than traditional processes.
III. Main Raw Materials of Oil-Gas Separation Filter Elements
Oil-gas separation filter elements use ultra-fine glass fiber composite filter materials from the US HV company. They have the following characteristics:
Material Composition: Composed of micrometer-level glass fiber filter materials in a multi-layer composite structure, with fiber diameters of 1 – 20μm, forming a three-dimensional interlaced filtering layer through special processes. This structure can effectively intercept 0.1μm-sized oil mist particles, with a separation gas oil content of ≤ 3PPM w/w.
Separation Mechanism: Through interception, diffusion and aggregation triple effects, small oil droplets are aggregated into large oil droplets. The oil mist particles are deposited by the bottom return oil pipe and returned to the lubrication system. The initial pressure difference is ≤ 0.02MPa, the replacement pressure difference is 0.7MPa, and the service life is 3500 – 5200 hours.
Environmental Adaptability: Tolerant to pH 2 – 12 acidic and alkaline environments, with a swelling rate of ≤ 5%. In 5000 cycle tests, performance only decays by 12%, working pressure range 1.4 – 2.5MPa, particularly suitable for harsh industrial environments such as petrochemical and power industries.
IV. Secondary Materials and Auxiliary Components
Resin Treatment Agent: These resins give the filter materials waterproof properties, enhance mechanical strength, and improve temperature resistance. Phenolic resin can withstand 280℃, maintaining stability at high temperatures.
Adhesive System: Using EVA, PO or PA type hot melt adhesives for filter element assembly. Air filter elements mostly use EVA hot melt adhesive, while oil filter elements use PA polyurethane hot melt adhesive. These adhesives have stable viscosity at the set temperature and form a strong bonding layer after curing, ensuring the integrity of the filter element structure. Functional additives: include waterproofing agents, whitening agents, dispersants and flame retardants, etc.
The above materials work together in a system to jointly ensure the excellent performance of the filter element products in terms of filtration accuracy, service life and mechanical strength. The precise ratio of different materials and processing techniques are the core technologies.
Post time: Jul-02-2025