Pellets LDPE reciclado para producción de film

Recycled LDPE pellets are produced from two main input streams, and the distinction matters significantly for quality, consistency, and application suitability. Post-industrial (PI) or pre-consumer rLDPE is derived from manufacturing waste — film trim, off-specification production, packaging waste from industrial users — and is typically cleaner, more consistent, and easier to reprocess into high-quality pellets. PI rLDPE is suitable for demanding film applications including agricultural films, food-adjacent packaging, and construction films. Post-consumer (PC) rLDPE is derived from collected and sorted consumer waste — carrier bags, shrink wrap, and collected film from retail and logistics operations. Quality is more variable, contamination levels higher, and consistent supply is more challenging. Post-consumer rLDPE is suitable for refuse sacks, construction sheeting, and non-food-contact packaging films. The reprocessing quality — washing, filtration melt purity, and pelletising conditions — has as much impact on end-product performance as the input material. Request melt filtration rating and gel count data from the supplier.

When evaluating recycled LDPE pellets, request CoA data for: MFI (typically 0.2–5.0 g/10 min at 190°C/2.16kg — confirm for your blown film line); density (LDPE: 0.915–0.935 g/cm³; LLDPE blends will be slightly higher); contamination level (expressed as parts per million of non-polyethylene contamination); moisture content (below 500 ppm for film extrusion — excess moisture causes bubbles and poor film quality); colour and appearance (natural/grey, black, coloured — confirm colour consistency batch to batch); and odour level. Ask the supplier about their washing process (cold wash, hot wash, friction wash), melt filtration pore size (finer filtration = fewer gels in the film), and whether they can provide a film test report showing bubble stability and surface defect levels from a blown film trial. Gel count is a key indicator of pellet quality — high gel count produces visible inclusions in the finished film.

For buyers supplying markets where recycled content claims must be verified — particularly EU packaging buyers subject to the EU Packaging and Packaging Waste Regulation (PPWR) recycled content targets — the supplier's Global Recycled Standard (GRS) certification is an important procurement requirement. GRS certification provides third-party verification of recycled content percentage and chain of custody from waste input through pellet production. Request the supplier's current GRS certificate and confirm the scope covers the specific product and input material. For buyers in markets where GRS is not required, a signed material declaration confirming the recycled content percentage and input material type may suffice. Always request documentation before making recycled content claims on finished products.