Analytical Testing Methods for Quantifying Recycled Content in Polyolefin Compounds
Accurate quantification of recycled polyolefins requires combining DSC thermal integration, high-temperature GPC, ICP-MS trace metals, and melt rheology sweeps.
Post Industrial Resin
Meaning
Plastic material diverted from the waste stream during a manufacturing process and reprocessed into pellets for compounding. Unlike post-consumer resin, this material comes from clean, known factory scrap and has not been contaminated by consumer use. This sourcing option provides high-quality recycled polymer.
Sourcing Standard
This material is collected from waste streams generated during extrusion, blow moulding, and injection moulding operations, such as sprues, runners, and off-spec parts. Because the source of the material is known, compounders can ensure the chemical composition is consistent. This feedstock is cleaner and easier to process than materials from post-consumer collection.
Quality Consistency
Utilizing post industrial resin helps moulders maintain consistent processing parameters and mechanical properties in the finished parts. Since the scrap is from a single industrial source, the batch-to-batch variation is much lower than that of municipal waste. This consistency reduces the risk of defects like warp, flash, and flow marks during injection moulding.
Cost Performance
Using this recycled resin provides a cost-effective alternative to virgin resin, allowing moulders to offer competitive pricing to their customers. It also helps companies meet their environmental and sustainability targets without compromising the mechanical performance of the product. This combination makes it a highly attractive option for high-volume moulding projects across various industries.