Turning Ocean Waste into Carbon-Negative Innovation
Every year, millions of tons of single-use and thermoformed plastic packaging are produced from fossil-based resins. While these materials provide performance and convenience, they also contribute to carbon emissions and long-term waste. At DESU, we believe sustainability begins with rethinking what materials can be made from.
That’s why we’ve developed an innovative carbon-negative material derived from oyster shells — a renewable, naturally occurring source of calcium carbonate (CaCO₃) that helps capture and store “new carbon” from the environment. This material is now used in our PET, PP, and PS thermoforming sheets, providing a sustainable alternative to traditional resins.
Why oyster shells? — Carbon-Negative Wisdom from the Ocean
At DESU, our choice of oyster shells is not accidental, but stems from a profound understanding and responsibility towards the Earth.
Carbon-Negative, Not Carbon-Neutral: During their growth, oysters actively absorb dissolved carbon dioxide (“new carbon”) from seawater to build their calcium carbonate shells. This means that each oyster shell is nature’s “carbon capture device.” When we convert it into material, we lock in this carbon, rather than release it. This is fundamentally different from mining limestone or talc—the latter releases “old carbon” buried underground for millions of years back into the atmosphere, a typical “carbon-positive” process.
Biorenewable and Utilizing Biowaste: Oysters are sustainably farmed, and their shells are an inexhaustible source of biowaste. By utilizing them, we not only reduce our dependence on non-renewable minerals but also solve the seafood industry’s daunting waste disposal problem, achieving a remarkable transformation from “waste” a “raw material.”
DESU’s commitment: Every gram of oyster shell calcium carbonate we use contributes to a reduction in carbon emissions—reducing atmospheric carbon and environmental waste.
Sustainable Impact You Can Measure
DESU’s oyster-shell-based additive doesn’t just sound sustainable — it delivers measurable environmental benefits:
- Up to 45% reduction in fossil-based resin usage
- Up to 43% lower carbon footprint in finished products
- Processed with a Let Down Ratio between 10–60%, adaptable to various thermoforming applications
By integrating this additive into our HIPS and PP sheet production, we help packaging manufacturers meet their carbon reduction goals while maintaining clarity, strength, and process efficiency.
| Especificación | PÁGINAS | CADERAS |
| Color | Cualquier color personalizado | Cualquier color personalizado |
| Ancho | 300~900(mm) | 300~900(mm) |
| Espesor | 0.3～1.5(mm) | 0.3～2.0 (mm) |
| Densidad | 0.92 (g/cm³ ) | > 1.06 (g/cm³ ) |
| Material | 10%~30% CaCO3 contain | 10%~30% CaCO3 contain |
Safe, Certified, and Ready for Food Contact
All components of DESU’s oyster-shell-based sheets are Generally Recognized as Safe (GRAS) for direct and indirect food and beverage contact.
Our facilities are certified with ISO9001, ISO14001, FDA, FSSC, and HACCP, ensuring strict quality, environmental, and food safety management.
For customers seeking verified sustainability, our recycled PET (RPET) and oyster-shell formulations are produced under GRS (Global Recycled Standard) certification, offering full traceability and compliance with international green standards.
A Step Toward a Circular, Low-Carbon Future
At DESU, sustainability is not a slogan — it’s a continuous process of innovation. By combining recycled polymers with natural, carbon-negative minerals, we aim to help brands and converters move toward a circular packaging economy.
Our goal is simple: to create plastic sheets that are high-performance, low-impact, and future-ready — contributing to cleaner oceans, reduced emissions, and more responsible material cycles.
