Meaning
High density polyethylene resin recovered from consumer waste streams provides a sustainable alternative to virgin plastic for non-food applications. Pcr hdpe is commonly sourced from milk jugs and detergent bottles that have been collected, washed, and pelletized. This material allows manufacturers to reduce their environmental footprint while maintaining the durability of their products.
Processing Characteristics
Recycled resin often has a different melt flow and consistency than virgin material. When using pcr hdpe, a moulder must adjust the temperature and pressure settings to account for the presence of multiple grades of resin in the mix. Adding a stabilizer package can help to restore some of the properties that were lost during the previous life of the plastic.
Careful monitoring of the melt viscosity is required because variations in the feedstock can lead to changes in how the material fills the mould, potentially causing flash or short shots.
Physical Properties
Strength and stiffness of the recycled material are usually slightly lower than those of new resin. Pcr hdpe may contain small amounts of contaminants or different polymers that affect the impact resistance and the color of the final part. Engineering the part with thicker walls or using it in less demanding applications can compensate for these differences in performance.
Economic Value
Demand for sustainable materials has made the pricing of recycled resin more complex. Using pcr hdpe can help a company meet its sustainability goals and appeal to environmentally conscious consumers. While the cost of processing and cleaning the waste can be high, the long term benefits of using recycled content are becoming more apparent as regulations around plastic use continue to tighten.
