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| A medium-temperature synthetic fiber filter material is formed by interlacing acrylic fibers (chemical name: homopolyacrylonitrile) onto acrylic base fabric through nonwoven needling technology, creating a three-dimensional network structure. | |||||||||
Alternative Names and Product Introduction
Also known as Polyacrylonitrile (PAN) Filter Bag and Acrylic Fiber Filter Bag, this industrial filtration solution is engineered for environments with mild chemical exposure and high humidity. Constructed from high-grade acrylic fibers, the filter bag delivers a unique combination of chemical resistance, tensile strength, and cost-effectiveness, making it an ideal replacement for standard polyester bags in corrosive conditions. Its core functionality lies in capturing industrial dust particles while withstanding acidic vapors and moisture, ensuring consistent performance in challenging operational settings.
Acrylic filter bags operate efficiently within a temperature range of 120°C to 140°C (248°F to 284°F), with short-term surge tolerance up to 149°C (300°F). This temperature stability, combined with excellent hydrolysis resistance, positions the product as a reliable choice for industries where moisture and chemical exposure are prevalent but not extreme.
Product Core Features
Chemical Resistance: Exhibits superior resistance to mild acids, alkalis, and oxidizing agents, preventing fiber degradation in humid or corrosive environments.
Filtration Efficiency: Achieves M13 filtration rating, capturing 99% of particles as small as 13 microns, suitable for medium-fine dust control in industrial processes.
Structural Design: Available in star-pleated configurations (also called "extend filter surface bags") that increase filtration area by up to 40% without requiring equipment modifications.
Durability: Features high tensile strength with glazed surfaces to minimize fiber shedding, ensuring a service life of 6–12 months in standard operating conditions.
Maximum Continuous Temperature: 140°C (284°F)
Surface Finish: Optional anti-static coating for low-risk explosive environments
Seam Construction: Heat-sealed or stitched with chemical-resistant threads to prevent bypass leakage
Analysis of Typical Application Scenarios
The Acid-Resistant Acrylic Filter Bag finds primary use in industries where moisture and mild chemical exposure are constant challenges:
Cement Production: Controls dust from clinker grinding and raw material handling, withstanding high humidity in kiln exhaust systems.
Chemical Processing: Filters dust from fertilizer production and pesticide manufacturing, resisting corrosion from ammonia and phosphate-based compounds.
Food Processing: Manages starch and flour dust in bakeries and grain mills, complying with FDA standards for indirect food contact.
Wastewater Treatment: Captures sludge particles in aerobic digestion processes, enduring moist conditions without hydrolysis.
Comprehensive Product Advantages
Compared to alternative filtration materials, this acrylic filter bag offers distinct benefits:
Cost-Effectiveness: 30–40% more affordable than PTFE or PPS filters while maintaining sufficient chemical resistance for mild applications.
Humidity Tolerance: Outperforms polyester bags in environments with >60% relative humidity, avoiding fiber degradation and premature failure.
Easy Integration: Fits standard baghouse collectors without modifications, reducing retrofitting costs for existing systems.
Sustainability: Fully recyclable at end-of-life, aligning with industrial waste reduction initiatives.
Detailed Customization Process
Our tailored manufacturing process ensures optimal performance for specific operational needs:
Requirement Assessment: Technical team analyzes dust type, temperature, humidity, and airflow to recommend material thickness and coating options.
Engineering Design: Customizes dimensions (diameters from 130mm to 200mm, lengths up to 3000mm) and seam type based on equipment specifications.
Prototype Testing: Produces 5–10 sample bags for on-site validation, measuring pressure drop and filtration efficiency under real operating conditions.
Mass Production: Utilizes automated sewing and welding technology to ensure consistency, with production capacity of 120 finished bags per hour.
Quality Assurance: Each batch undergoes pressure testing at 2.5 bar to verify seam integrity and resistance to air bypass.
Quality Inspection Process Standards (in Accordance with GB/T 6719-2009)
Raw material inspection
Fiber composition identification (infrared spectroscopy verification of homopolyacrylonitrile structure), gram weight (±50g/m² tolerance), thickness (2.0±0.2mm);
Film integrity: Pore size distribution tested by bubble point method (ISO 4003).
Production process monitoring
Needling uniformity: The density deviation of the felt layer detected by laser is ≤5%.
Heat setting process: Heat shrinkage rate ≤1% at 150℃.
Finished product testing
Physical properties
Breaking strength (warp direction ≥800N/5×20cm, weft direction ≥1000N/5×20cm)
Air permeability (uncoated ≥12m³/m²·min).
Functional testing
Acid and alkali resistance: After soaking in 10% H₂SO₄/NaOH for 72 hours, the strength retention rate is ≥85%.
Sealing performance: No leakage after maintaining a negative pressure of 0.3MPa for 1 hour.
Water repellency: The water contact grade of the spray test surface is ≥4 (GB/T 4745).
