Bleach-compatible PET bottles with novel compatibilization technology
Introducing a multi-layer PET bottle solution featuring a novel compatibilizer that enables recyclability and bleach resistance, ideal for packaging caustic substances while maintaining structural integrity and clarity.
Overview
This innovative solution involves a multi-layer PET bottle designed to be recyclable and bleach-resistant, ideal for packaging caustic substances. Featuring an outer layer of virgin or PCR PET for structural strength and clarity, it incorporates a clear polyolefin liner for chemical resistance to bleach. A novel compatibilizer, developed by the Coates Group, forms covalent bonds between PET and polyolefin, ensuring mechanical recyclability in existing streams. This technology aims to enhance the sustainability and functionality of PET bottles in various applications.
Technical specifications
Key features:
- Multi-layer design: Combines PET outer layer with a polyolefin liner for bleach resistance and FDA compliance.
- Compatibilizer: Forms strong bonds between PET and polyolefin, enabling recyclability.
- Structural integrity: Maintains rigidity and clarity with PET's structural properties.
- Recyclability: Compatible with current post-consumer PET recycling streams.
- Lightweighting potential: PET allows for reduced wall thickness compared to HDPE bottles.
Process compatibility:
- Co-injection friendly, leveraging standard PET platforms.
- Potential for cost parity with HDPE due to thin liner geometry and commodity polyolefins.
- Expected FDA Food Contact Approval, utilizing compliant resins.
Technology readiness level
Currently at Technology Readiness Level 4, this solution has been demonstrated in a lab environment. Further scale-up of the compatibilizer is planned, alongside collaboration with industry partners to validate recyclability and mechanical strength through standardized ASTM testing.
About Cornell University
Cornell University is a comprehensive private, land-grant research university with campuses in Ithaca and New York City, combining significant scale with cross-disciplinary breadth. Industry connects through open-access user facilities and prototyping labs, pilot-scale testbeds, and a research and technology park that provide pathways from discovery to demonstration. A statewide extension network and integration with a major hospital system enable real-world deployment, while a graduate campus embedded in New York City’s tech corridor provides direct access to startups, venture investors, and corporate R&D teams. Research is supported by competitive federal funding from agencies such as the National Science Foundation, National Institutes of Health, the Department of Energy, and the U.S. Department of Agriculture. A dedicated technology transfer office streamlines IP management, licensing, startup formation, and corporate partnerships across campuses.
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