Upcycled PE/PP blends for sustainable lightweight packaging
Seauciel LLC introduces a novel Hydrothermal Chemi-Mechanical Recycling process using supercritical water to upcycle PE/PP waste into high-quality compounds for rigid and flexible packaging. This method reduces VOCs, preserves molecular weight, and opens new material applications.
Overview
Seauciel LLC has developed an innovative recycling process termed "Hydrothermal Chemi-Mechanical Recycling" for upcycling post-consumer recycled (PCR) PE/PP blends. Utilizing supercritical water, this method effectively cleans, sterilizes, removes color, and reduces volatile organic compounds (VOCs) while preserving molecular weight. The process transforms comingled PE/PP waste into valuable compounds suitable for rigid packaging and other applications, offering a sustainable alternative to virgin materials and reducing production costs and energy consumption.
Technical specifications
Key features:
- Utilizes supercritical water for effective cleaning and sterilization
- Produces a range of materials from rigid thermoplastics to waxes
- Suitable for applications such as waxes, extrusion coatings, and injection molding
- Patent-pending technology
- Collaboration with Worcester Polytechnic Institute and University of Akron to refine process parameters and optimize extrusion conditions
Technology readiness level
Currently at Technology Readiness Level 3, this technology has been validated in laboratory settings. Ongoing efforts aim to scale up the process through collaboration with extrusion manufacturers and further experimentation. Techno-Economic and Lifecycle Analyses (TEA/LCA) will be conducted to assess economic and environmental viability.
About Seauciel LLC
Seauciel LLC is a technology-focused enterprise dedicated to advancing the circular economy by producing value-added materials from comingled plastic waste. The company has developed a patent-pending technology referred to as water-phase chemical mechanical recycling. This innovative process utilizes water heated above its normal boiling point to convert polymer mixtures, such as polyethylene and polypropylene, into a microscopically mixed state without causing polymer degradation. By carefully controlling exposure to high temperatures, this method minimizes the loss of molecular weight, removes pigments, and significantly reduces the volatile organic compounds typically associated with recycled plastics. This approach aims to provide a sustainable alternative to traditional mechanical and chemical recycling methods, offering energy efficiency comparable to mechanical recycling while producing materials with properties closer to virgin plastic.
This technology addresses significant global challenges in plastic waste management, where current recycling rates remain low due to performance loss, contamination, and the difficulty of processing mixed plastics. By enabling the effective reuse of incompatible plastic mixtures, Seauciel’s process offers a solution to reduce environmental impact, including landfill waste and marine pollution. The company collaborates with academic institutions, such as the Worcester Polytechnic Institute and the University of Akron, to refine and scale its technical processes. Its work is focused on making the resulting recycled plastic competitive with virgin materials in terms of quality, price, and sustainability, positioning the firm as a contributor to material science innovation and industrial sustainability.
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