Two laser-drilled filter discs, fixed scrapers and an automatic discharge system remove contaminants from the melt continuously. No screen-change stops, melt loss below 1%, and filter discs that run for weeks or months before replacement.
In recycling, regranulation and direct extrusion of recycled material, the melt carries a heavy load of solid contaminants: aluminium from multilayer packaging, elastomers, unmelted particles and other foreign matter. A conventional screen pack retains them, its open area shrinks and pressure climbs until the screen has to be changed — many times per shift. Every change means lost production, pressure peaks at restart, melt discarded with the screen pack and operator time.
Illustrative example: regranulation line running at 1,000 kg/h.
How ScrapeAway works
ScrapeAway does not replace a dirty screen with a clean one. It keeps the same filtering surface clean, continuously. The extruder never stops, and the filter discs stay in service for weeks or months.
A woven wire screen cannot be scraped: the scraper would deform and tear the mesh. ScrapeAway uses solid steel filter discs in which the holes are made by laser drilling. The result is a hard, flat filtering surface that withstands continuous contact with the scrapers, and a defined, uniform hole size across the whole disc.
Materials with low flowability may require discs with larger holes. Cofit engineers define the filtration level together with you, on the basis of your actual material.
No screen-change stops. Scraping and discharge run automatically while the line produces.
The filtering surface is cleaned, not replaced: disc replacement becomes a planned maintenance task, not a daily routine.
Closed system, no contact with outside air. Contaminants are concentrated before discharge, so less than 1% of the melt leaves the filter with the waste.
An optimised internal flow path and efficient discharge reduce the time the melt spends in the filter, limiting thermal stress.
Effective on aluminium and elastomers as well as on conventional solid contaminants.
Up to 250 bar and 300 °C. Four sizes up to 5,000 kg/h per unit, and modular configurations for higher outputs or finer filtration.
Valid for all four ScrapeAway sizes.
For PP, PE, PET, PS, ABS and other thermoplastics, wherever solid contaminants would otherwise force frequent screen changes.
Recycling and Regranulation
Post-consumer and post-industrial thermoplastics
Direct Pipe Extrusion
Pipe from recycled material, without a separate pelletizing step
PP / PET Strapping
Strapping lines running on recycled or contaminated feedstock
All models: max. operating pressure 250 bar, max. operating temperature 300 °C, melt loss below 1%.
| Model | Filter Ø (mm) | Filter discs | Heating (kW) | Main drive (kW) | Discharge drive (kW) | Throughput low (kg/h) | Throughput high (kg/h) | Weight (t) |
|---|---|---|---|---|---|---|---|---|
| ScrapeAway 260 | 260 | 2 | 15.0 | 3.0 | 1.1 | ≤ 300 | ≤ 600 | 0.7 |
| ScrapeAway 360 | 360 | 2 | 26.0 | 5.0 | 1.1 | ≤ 500 | ≤ 1,000 | 1.5 |
| ScrapeAway 500 | 500 | 2 | 40.0 | 5.0 | 1.1 | ≤ 1,200 | ≤ 2,600 | 1.8 |
| ScrapeAway 700 | 700 | 2 | 52.0 | 7.5 | 1.1 | ≤ 2,400 | ≤ 5,000 | 2.6 |
Filtration range: 100–1,000 µm, depending on melt flowability. Materials with low flowability may only be suitable for discs with larger holes.
Throughput values are indicative, referred to a melt viscosity of 1,000 Pa·s and a specific flow rate of 5.5 kg/h·cm². Actual throughput depends on filtration level, material flowability, melt inlet pressure and contamination content. The lower value applies to fine filtration or difficult materials, the higher value to coarse filtration and good flowability.
Modular configurations: for higher outputs or finer filtration, 2, 4, 6 or 8 ScrapeAway 500 units can be combined in parallel or in series.
Tell us your material, throughput and contaminants: our engineers will recommend the right Cofit filtration technology for your line.
Request a Technical AlignmentA screen changer replaces a clogged screen with a clean one, either manually or automatically. A scraping melt filter like ScrapeAway keeps the same filtering surface clean while it works: scrapers remove the contaminants from the laser-drilled discs continuously, and the contaminants are discharged automatically.
ScrapeAway works with laser-drilled filter discs from 100 to 1,000 µm. The achievable level depends on the flowability of the material: low-flow materials may require larger holes.
Because the discs are cleaned continuously, ScrapeAway can run for weeks or months without replacing them. The actual interval depends on the type and amount of contamination.
ScrapeAway is designed for heavily contaminated melts, including aluminium and elastomers, in recycling, regranulation and direct extrusion of recycled material.
Single units cover from a few hundred kg/h up to 5,000 kg/h. Real throughput depends on filtration level, material flowability, inlet pressure and contamination. Higher outputs are possible with multiple units in parallel.
Less than 1%. ScrapeAway is a closed system: the contaminants are concentrated before being discharged, so very little good polymer leaves the filter with them.
All ScrapeAway models operate up to 250 bar and 300 °C.
Tell us your material, throughput, contamination type and target filtration level. Cofit engineers will size ScrapeAway, or a multi-unit configuration, on your real process conditions.
Tell us what you process, at what throughput and with which contaminants. Our engineers will size ScrapeAway on your real process conditions.
