Applications
Our industrial polymer candle filter systems are engineered to protect product quality, maximize uptime, and reduce waste across the entire plastics value chain. In today’s competitive landscape, even microscopic contaminants—gels, carbonized particles, catalyst residues, or foreign debris—can cause costly line breaks, off-spec product, and unplanned shutdowns. Whether you are producing virgin resin at multi-thousand-ton scale, compounding high-performance engineering plastics, spinning fine-denier fibers, or converting post-consumer waste into premium pellets, filtration is not just a safeguard; it is a critical process step that defines your yield and profitability.
Polymerization
In polymerization reactors and finishing lines, even microscopic gels, catalyst residues, or cross-linked particles can ruin batch consistency and cause downstream line breaks. Our filtration systems are installed directly on reactor discharge, melt pumps, and transfer lines to ensure ultra-clean polymer melts before they enter storage or downstream processing.
Key Benefits: Removal of catalyst fines, gels, and char; prevention of spinneret clogging in fiber lines; extended run-lengths between reactor clean-outs.
Typical Polymers: PET, PBT, Nylon (PA6, PA66), Polypropylene (PP), Polycarbonate (PC).
Filtration Level: 5–25 µm absolute.
Compounding
Compounding lines operate under extreme pressures and shear, processing highly filled polymers, color masterbatches, and engineering alloys. Contaminants like unmelted or carbonized particles, or foreign debris can cause screen packs to blind rapidly, leading to costly extruder shutdowns. Our continuous filters maintain stable melt pressure and homogeneous additive dispersion.
Key Benefits: Stable head pressure; reduced gel counts; ability to process high-fill formulations without frequent screen changes.
Typical Applications: Color masterbatch, glass-filled nylon, flame-retardant compounds, TPE/TPV alloys.
Filtration Level: 10–100 µm (depending on filler size).
Textile (Fiber & Filament)
In staple fiber and filament spinning, even a single unfiltered particle can trigger filament breakage, causing line interruptions and significant yield loss. Our precision candle filters and leaf disk filters are engineered to remove sub-micron gels and agglomerates that lead to spin-pack failures, helping ensure stable, continuous, and high-speed spinning performance with fewer breaks and higher product quality.
Key Benefits: Drastic reduction in spinneret blockages; fewer thread breaks; improved tensile strength and dye uniformity in finished fibers.
Typical Polymers: PET (POY, FDY, IDY), Nylon 6, Nylon 66, PP (BCF, spunbond).
Filtration Level: 1–10 µm absolute.
Film (Cast, & BOPP/BOPET)
Film producers require exceptional optical clarity and mechanical integrity. Even small unfiltered contaminants can create gels, fish-eyes, and pinholes, leading to web breaks during stretching, unstable processing, and rejected rolls at converting or end-use stages. Our filtration systems protect cast film dies, improve bubble stability, and deliver a smoother, more consistent surface finish for higher product quality and reduced scrap
Key Benefits: Elimination of die lines and gels; higher line speeds; reduced scrap rates in critical applications like food packaging and lithium-ion battery separators.
Typical Polymers: BOPET, BOPP, LDPE/LLDPE, EVOH, Barrier Films.
Filtration Level: 5–15 µm absolute.
Chemical Recycling
Chemical recycling processes—such as pyrolysis, gasification, and depolymerization—generate feeds with highly variable and aggressive contaminant loads. Our robust filtration solutions, featuring specialized construction, protect pumps and reactors in these harsh environments, enabling virgin-equivalent recycled polymers.
Key Benefits: Protection of sensitive catalysts in depolymerization; removal of char from pyrolysis oil; enabling closed-loop monomer recovery.
Typical Processes: Pyrolysis oil filtration, PET glycolysis/methanolysis, Nylon hydrolysis.
Filtration Level: 1–50 µm (high dirt-holding capacity).
Mechanical Recycling
Mechanical recycling of post-consumer rigid and flexible plastics presents unique challenges: high levels of paper labels, adhesives, metals, and degraded polymer. Within assistance of pre-filtration our LAF filters are built to handle these extreme contamination loads without blinding, allowing recyclers to maximize throughput and produce high-purity rPET, rPP, and rPE pellets.
Key Benefits: Continuous operation despite high contaminant loads; reduced melt pressure spikes; higher quality flake-to-pellet conversion.
Typical Inputs: Post-consumer bottles (rPET), mixed rigid plastics (rPP/PE), agricultural film.
Filtration Level: 25–100 µm (often with pre-filtration stages).