Continuous Filter Belts
Continuous Filter Belts | Auto Screen Belts | Screen Changer Belts
Continuous Filter Belts, also known as automatic belt filters or continuous screen changer belts, are innovative woven wire mesh rolls used in extrusion machinery to maintain a constant flow of clean molten polymer. Unlike traditional static screens that require frequent manual replacements, these belts automatically advance through a screen changer mechanism, introducing fresh filtration media as contaminants accumulate. This design ensures non-stop production, minimizing interruptions and maximizing throughput.
✅ Ships to 50+ countries
✅ Custom widths in 7–15 days
✅ Sample rolls available
Introduction to Continuous Filter Belts
Primarily constructed from premium stainless steel wires, our continuous filter belts feature a Reverse Dutch Weave (RDW) pattern, which offers exceptional tensile strength and precise filtration. They are resistant to acids, alkalis, corrosion, and extreme temperatures (up to 500°C), making them suitable for demanding applications in the plastics industry. By filtering out impurities like gels, unmelted particles, and foreign matter, these belts prevent defects in extruded products such as films, sheets, and profiles, while protecting downstream equipment like dies and gear pumps.
In the context of polymer extrusion, continuous filter belts are integrated into screen changers that operate under pressures of 40-100 psi or higher. As the belt moves, dirty sections are expelled, and clean ones take their place, often triggered by pressure sensors for optimal performance. This automation is particularly beneficial for processing recycled plastics, where contaminant levels are high, allowing for extended run times and reduced labor costs.
Our manufacturing process adheres to strict quality standards, ensuring uniform mesh openings and durable construction. With a focus on customization, we tailor belts to fit specific extruder models, enhancing compatibility and efficiency.
See our complete filter belt selection guide
Advantages of Continuous Filter Belts
Incorporating continuous filter belts into your extrusion line offers numerous benefits, transforming your production process for better efficiency and profitability. Here are the key advantages:
- Uninterrupted Production: Automatic advancement eliminates manual screen changes, reducing downtime to near zero and enabling 24/7 operations—potentially quadrupling throughput in high-volume settings.
- Superior Durability and Resistance: Corrosion, acid, alkali, and high-temperature resistant, ensuring long service life even in aggressive environments.
- Enhanced Filtration Efficiency: RDW weave provides precise contaminant removal while maintaining low pressure drop, improving melt quality and reducing defects like streaks or holes.
- Cost Savings: Minimizes labor, scrap rates, and energy consumption; ideal for recycling lines where frequent changes would otherwise be costly.
- Easy Maintenance: Simple roll replacements and compatibility with automated changers reduce operational complexity.
- Versatility: Suitable for various polymers (PP, PE, PET, PVC) and high-contaminant feeds, offering flexibility across industries.
- Environmental Benefits: Supports sustainable practices by enabling efficient recycling without production halts.
Compared to semi-continuous or manual systems, our belts provide a competitive edge by optimizing flow and extending equipment life.
Continuous Filter Belts vs. Traditional Screen Packs
Not sure whether a continuous filter belt or a traditional screen pack is right for your line? Here is a direct comparison:
| Feature | Continuous Filter Belt | Traditional Screen Pack |
|---|---|---|
| Production Continuity | ✅ Non-stop — belt advances automatically | ❌ Line must stop or slow for screen change |
| Downtime | Near zero | 5–30 min per change, multiple times per shift |
| Labor Required | Minimal — operator only loads new roll | Manual intervention every change cycle |
| Best For | High-output lines, recycled plastics, 24/7 operations | Low-contaminant virgin material, small-scale runs |
| Filtration Consistency | Constant — always fresh media in contact with melt | Degrades between changes as screen loads up |
| Cost Model | Higher consumable cost per meter; lower total operating cost | Lower unit cost; higher labor and scrap cost |
| Compatible Equipment | Continuous screen changers (Erema, Gneuss, Ettlinger, etc.) | Slide plate, piston, or bolt-type screen changers |
Conclusion: If your line runs recycled material, operates 24/7, or experiences frequent screen clogging, a continuous filter belt system will reduce total cost and improve output quality significantly.
Specifications of Our Continuous Filter Belts
We offer a wide range of specifications to meet diverse extrusion needs. Below is a detailed overview of key parameters, based on industry-standard designs for optimal performance in continuous screen changers.
Material and Construction
- Materials: High-grade stainless steel (201 304, 304L, 316, 316L) for corrosion resistance and longevity. Optional nickel alloys for highly corrosive environments.
- Weave Type: Reverse Dutch Weave (RDW) for superior strength and filtration precision; also available in Plain Dutch Weave (PDW) or Twill Dutch Weave.
- Tensile Strength: High tensile (standard) or normal tensile options, ensuring durability under mechanical stress.
Dimensions and Mesh Details
- Belt Widths: 50 mm to 300 mm (common sizes: 97 mm, 120 mm, 150 mm, 200 mm).
- Roll Lengths: Up to 100 meters per roll, customizable for extended use.
- Mesh Ratings: 60 to 1000 microns filtration rating; common mesh counts include 48×10, 72×15, 132×17, 152×24, 260×40, and 400×120 for balanced flow and particle capture.
- Wire Diameter: Varies by mesh (e.g., 0.15 mm to 0.50 mm warp/weft), optimized for minimal pressure drop.
Performance Ratings
- Temperature Resistance: Up to 500°C, suitable for most polymer melts.
- Pressure Tolerance: Handles 40-100+ psi, with low initial pressure drop for energy efficiency.
- Filtration Layers: Single-layer standard; multi-layer options available for enhanced dirt-holding capacity.
| Popular Sizes of Continuous Belts Filter (Reverse Dutch Weave) | |||||
| Mesh Size (warp/inch × weft/inch) | Wire diameter (mm) (warp × weft) | Fineness of filtering (micron) | Weight (kg/m2) | Width (mm) | Length (m) |
| 48 × 10 | 0.5 × 0.5 | 400 | 3.63 | 50-300 | Up to 100 |
| 63 × 18 | 0.4 × 0.6 | 220 | 4.14 | 50-300 | Up to 100 |
| 72 × 15 | 0.45 × 0.55 | 250 | 4.78 | 50-300 | Up to 100 |
| 100 × 16 | 0.35 × 0.45 | 190 | 3.87 | 50-300 | Up to 100 |
| 107 × 20 | 0.24 × 0.60 | 210 | 3.34 | 50-300 | Up to 100 |
| 120 × 16 | 0.35 × 0.45 | 180 | 4.49 | 50-300 | Up to 100 |
| 132 × 17 | 0.32 × 0.45 | 170 | 4.24 | 50-300 | Up to 100 |
| 152 × 24 | 0.27 × 0.4 | 160 | 3.73 | 50-300 | Up to 100 |
| 160 × 17 | 0.27 × 0.45 | 160 | 2.02 | 50-300 | Up to 100 |
| 170 × 18 | 0.27 ×0.45 | 160 | 4.01 | 50-300 | Up to 100 |
| 171 × 46 | 0.15 × 0.30 | 130 | 2 | 50-300 | Up to 100 |
| 180 × 20 | 0.27 × 0.45 | 170 | 4.29 | 50-300 | Up to 100 |
| 200 × 40 | 0.17 × 0.27 | 120 | 2.17 | 50-300 | Up to 100 |
| 240 × 40 | 0.15 × 0.25 | 70 | 1.98 | 50-300 | Up to 100 |
| 260 × 40 | 0.15 × 0.27 | 55 | 2.19 | 50-300 | Up to 100 |
| 290 × 76 | 0.09 × 0.19 | 40 | 1.27 | 50-300 | Up to 100 |
| 300 × 40 | 0.15 × 0.25 | 50 | 2.31 | 50-300 | Up to 100 |
| 300 × 80 | 0.15 × 0.2 | 35 | 2.49 | 50-300 | Up to 100 |
| Special specifications can be customized upon your requirements | |||||
Compatible Screen Changer Brands
Our continuous filter belts are precision-cut to fit the most widely used continuous screen changer systems on the market. Standard and custom widths are available to match your exact equipment specifications.
- Erema – Compatible with Erema continuous screen changer models (e.g., RSFgenius, Intarema series); common widths: 97 mm, 120 mm, 150 mm
- Gneuss – Fits Gneuss Rotary Filtration Systems (MRS, MRF series); common widths: 120 mm, 150 mm, 200 mm
- Ettlinger – Compatible with Ettlinger ERF continuous melt filters; common widths: 150 mm, 200 mm
- Nordson BKG – Fits BKG continuous belt screen changers; standard and custom widths available
- Kreyenborg – Compatible with Kreyenborg belt-type screen changers
- Custom / OEM – Not sure which width fits your machine? Send us your screen changer model number and we’ll confirm compatibility.
All belts are supplied in roll form and can be cut to your required length. Contact us with your machine model for a compatibility check.
Applications of Continuous Filter Belts
Our continuous filter belts are versatile and trusted across multiple industries for their reliability in demanding extrusion processes. Key applications include:
- Plastic Film and Sheet Extrusion: Ensures clean melts for high-quality films, reducing defects in packaging and industrial films.
- Rubber Processing and Compounding: Filters contaminants in rubber extrusion for tires, seals, and profiles, handling high-viscosity materials effectively.
- Polymer Recycling Lines: Ideal for processing recycled plastics with heavy impurities, improving output quality and profitability.
- Petroleum and Petrochemical Refining: Used in extrusion for oils and chemicals, providing robust filtration under extreme conditions.
- Fiber and Non-Woven Production: Maintains purity in melt-blown or spunbond processes for textiles and medical fabrics.
- Food and Pharmaceutical Extrusion: Compliant options for edible polymers or high-purity applications, ensuring contaminant-free outputs.
In each case, our belts integrate seamlessly with continuous screen changers, supporting high-speed production while meeting stringent quality standards.
Frequently Asked Questions
What is a continuous filter belt used for?
A continuous filter belt is a woven wire mesh roll used in automatic screen changers to provide uninterrupted melt filtration during plastic extrusion and rubber processing. As the belt advances, clean mesh replaces contaminated sections without stopping the production line, making it ideal for recycling lines and high-throughput operations.
What micron rating should I choose for my application?
The right micron rating depends on your material and quality requirements. As a general guide: 200–400 micron belts suit rubber extrusion and heavily contaminated recycled plastics; 100–200 micron belts are common for standard PE/PP recycling; 35–100 micron belts are used for high-quality film, fiber, and PET applications. If you are unsure, share your material type and end product with us and we will recommend the correct mesh count.
What width do I need for my screen changer?
Belt width must match your screen changer’s filter channel width exactly. Common widths include 97 mm, 120 mm, 150 mm, and 200 mm. Please check your machine’s manual or contact the screen changer manufacturer for the correct specification. We also produce custom widths from 50 mm to 300 mm.
What materials are your filter belts made from?
Our standard belts are woven from 304 or 316 stainless steel wire in a Reverse Dutch Weave (RDW) pattern, which provides the best combination of tensile strength and filtration precision. We also offer 304L, 316L, and nickel alloy options for highly corrosive polymers or specialty applications.
What is the minimum order quantity (MOQ)?
We supply both sample rolls and bulk orders. MOQ varies by specification — please contact us with your required width, micron rating, and estimated annual volume for a tailored quote.
How long does delivery take?
Standard specifications are typically shipped within 7–15 business days. Custom widths or special alloy materials may require 3–4 weeks. We ship worldwide via DHL, FedEx, and sea freight depending on order volume.
Can I get a sample before placing a bulk order?
Yes. We offer sample rolls for evaluation. Contact us with your screen changer model and required specifications and we will arrange a sample shipment.
Request A Quote
Tell us your screen changer model, required belt width, and micron rating we’ll confirm compatibility and send a quote within 24 hours.
Sample rolls available on request.
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