Biopolymer

PHA Biopolymers Transform Disposable Tableware: CJ Biomaterials’ Sustainable Breakthrough at K2025

In a world rapidly shifting toward sustainable food packaging, CJ Biomaterials, the bioplastics division of CJ CheilJedang, has taken a bold step forward. At K2025, the company unveiled a new generation of PHA (polyhydroxyalkanoate) biopolymers engineered specifically for extrusion coating applications in disposable tableware and food containers.

These next-generation biopolymers offer a renewable, compostable, and high-performance alternative to conventional polyethylene (PE) coatings commonly used on paper cups, plates, and packaging. Designed for scalability and circularity, CJ Biomaterials’ innovation represents a major milestone in the transition toward biobased and biodegradable packaging solutions.

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The Challenge with Conventional Coatings

For decades, the foodservice and disposable packaging industries have relied heavily on polyethylene coatings to provide water and grease resistance on paper-based products. While effective, these coatings pose a major recycling problem: they make it nearly impossible to repulp or compost coated materials at end-of-life.

As regulations tighten and consumer expectations shift toward environmentally friendly solutions, companies face growing pressure to replace fossil-based plastics with sustainable, circular alternatives. This is where PHA biopolymers — derived from renewable sources — come into play.

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CJ Biomaterials’ Innovation: PHA for Extrusion Coating

CJ Biomaterials’ new Phact PHA line combines two distinct polymer types — amorphous PHA (aPHA) and semi-crystalline PHA (scPHA) — into a single platform optimized for extrusion coating processes. The blend leverages the strengths of both material forms to create a stable melt, ensuring excellent coating uniformity and adhesion.

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“Our new PHA compounds represent a true alternative to polyethylene coatings,” explains Max Senechal, Chief Commercial Officer at CJ Biomaterials. “They offer the functionality that foodservice brands need — barrier performance, heat resistance, and compostability — all from renewable biopolymers.”

Key Performance Highlights

• Excellent liquid and grease barrier: Prevents leaks and maintains structural integrity in cups, trays, and bowls.

• Strong adhesion to paper and cardboard: Ensures durability during use and sealing.

• Versatility: Suitable for both hot and cold applications — from coffee cups to frozen food trays.

• Sustainability: Fully compostable and repulpable, supporting circular end-of-life pathways.

These performance advantages make the Phact PHA platform one of the most promising developments in biopolymer coatings for the food packaging industry.

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Designed for Real-World Applications

CJ Biomaterials has conducted extensive testing to ensure the new PHA coatings meet real-world demands. Tests have included sealing, adhesion, and edge performance on a variety of paper-based substrates such as:

• Hot and cold beverage cups

• Trays and bowls for ready meals

• Lids and takeout containers

The coatings have demonstrated consistent integrity under both heat and moisture, matching or exceeding the performance of polyethylene while offering superior environmental benefits.

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Compostability and End-of-Life Options

A key differentiator of CJ Biomaterials’ PHA biopolymers is their broad compostability profile. Products coated with these materials can be composted either industrially or at home, breaking down alongside organic waste.

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“Tableware made with our Phact PHA compounds can enter multiple end-of-life streams — composting, paper recycling, or even biodegradation in marine environments,” says Senechal.

Certified Environmental Compliance

CJ Biomaterials’ Phact grades carry several internationally recognized certifications:

These certifications confirm that the PHA biopolymers meet the highest global standards for safety and environmental performance.

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Circularity Through Repulpability

Unlike conventional coatings, which contaminate the recycling stream, the new PHA-based coatings have passed repulpability tests. This means they can be processed with paper fibers during recycling, without requiring complex separation steps.

This compatibility significantly expands end-of-life options for coated paper products, supporting circular economy goals by reducing waste and enabling material recovery.

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The Science Behind the Material

The innovation lies in how CJ Biomaterials blends amorphous and semi-crystalline PHAs to achieve an ideal balance of flexibility and barrier protection.

• Amorphous PHA (aPHA): Enhances elasticity and transparency.

• Semi-crystalline PHA (scPHA): Improves stiffness and thermal resistance.

When combined, these two molecular structures produce a homogeneous, stable melt during extrusion coating — a key requirement for commercial viability.

This dual-structure formulation also allows the coating to maintain strong adhesion to cellulose fibers, ensuring performance stability even under temperature fluctuations.

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Meeting the Needs of Modern Foodservice Brands

The foodservice industry is undergoing a profound transformation. With extended producer responsibility (EPR) laws expanding across the U.S. and Europe, brands are under mounting pressure to shift toward biobased materials.

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“Foodservice companies and brands are increasingly turning to PHA biopolymers to align with sustainability commitments and evolving legislation,” adds Senechal. “We’re helping them meet those challenges with a material that performs and protects the planet.”

The combination of performance, compostability, and regulatory compliance positions CJ Biomaterials as a key partner for global foodservice brands aiming to achieve measurable sustainability targets.

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Production and Market Expansion

CJ Biomaterials entered the biopolymer market in 2022 with the launch of its Phact PHA production plant in Indonesia, which boasts an annual capacity of 5,000 tons. The company has since accelerated its R&D efforts to scale production and develop application-specific grades for various industries.

The new extrusion coating line marks a major step in this expansion, opening opportunities across:

• Disposable tableware and packaging

• Paper-based beverage cups

• Compostable food containers

• Flexible paper-based films and wraps

With strong growth in sustainable packaging demand, CJ Biomaterials is positioning its PHA technology platform as a viable, scalable alternative to petroleum-based plastics.

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Why PHA Matters in the Biopolymer Landscape

In the rapidly evolving world of biopolymers, PHA stands out as one of the few materials that combine biobased origin, biodegradability, and industrial functionality. Derived from renewable carbon sources through microbial fermentation, PHA offers a genuine pathway to plastic-free packaging.

Advantages of PHA Biopolymers:

• Fully renewable feedstock: Produced from sugars or plant oils.

• High biodegradability: Breaks down naturally in compost or marine environments.

• Thermoplastic versatility: Can be processed using conventional plastic machinery.

• Regulatory readiness: Compliant with international compostability standards.

CJ Biomaterials’ work with extrusion-grade PHAs proves that biopolymers can not only replace traditional plastics but also outperform them in circularity and environmental safety.

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Life Cycle Benefits: A Quantitative Perspective

Independent life cycle assessments (LCAs) conducted by CJ Biomaterials indicate substantial environmental advantages for PHA coatings compared to PE-based alternatives:

These findings reinforce the potential for PHA biopolymers to deliver measurable sustainability gains across the packaging supply chain.

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Aligning with Global Sustainability Goals

The launch of these new PHA compounds comes at a critical time for the packaging and foodservice industries. With the EU’s Packaging and Packaging Waste Regulation (PPWR) and the U.S. EPR frameworks on the horizon, companies must pivot quickly to biobased, compostable solutions.

By enabling recyclable, compostable coatings for disposable paper products, CJ Biomaterials provides a scalable bridge to compliance with emerging sustainability standards.

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Looking Ahead: The Future of PHA in Packaging

As the demand for eco-friendly packaging accelerates, PHA biopolymers are poised to play a leading role in the next generation of circular materials. CJ Biomaterials plans to:

• Expand production capacity in Asia and North America.

• Develop new PHA blends for barrier films and flexible packaging.

• Partner with converters and brand owners to scale market adoption.

The company’s ongoing commitment to research and collaboration ensures that PHA coatings will continue evolving to meet future environmental and performance requirements.

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Conclusion: From Innovation to Transformation

CJ Biomaterials’ PHA biopolymers for extrusion coating represent a pivotal advancement in sustainable materials science. By providing a renewable, compostable, and high-performing alternative to polyethylene, the company is helping redefine what’s possible in disposable packaging.

These innovations are more than incremental improvements — they signal a transformative shift toward circularity in the global packaging industry. With the Phact PHA platform, CJ Biomaterials demonstrates that sustainability and functionality can coexist — and that the age of biopolymers has truly begun.

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