Chitosan-based compostable foam packaging with surface treatment for water and oil resistance

Overview

Cruz Foam produces chitosan-based foam packaging designed as a sustainable alternative to expanded polystyrene (EPS). Chitosan, derived from crustacean shell waste, enables a regenerative material solution that addresses plastic pollution while delivering the protective performance required for packaging applications. The company has confirmed that its foams can achieve certified compostability and exhibit mechanical properties comparable to EPS, including tensile strength, elastic modulus, compression strength, and compression set.

The company is actively working on two critical commercialization milestones: achieving cost parity with conventional EPS products through supply chain optimization, and developing surface treatments to prevent water and oil absorption. These advancements position Cruz Foam as a viable drop-in replacement for EPS in protective packaging, cold chain, and food contact applications.

Technical specifications

Material and performance:

• Chitosan-based foam formulations developed through iterative R&D
• Mechanical properties validated against comparable EPS foams across tensile strength, elastic modulus, compression strength, and compression set
• Certified compostability confirmed through third-party compostability testing labs

Manufacturing processes validated:

• Thermoforming for shaped packaging components
• Die-cutting for precision part fabrication
• Laminating for multi-layer constructions

Surface treatment development:

• Active R&D into physical and chemical surface treatments to repel water and oil absorption
• Collaboration with biomaterial companies to identify effective treatment chemistries
• In-house and third-party method development underway

Supply chain and cost engineering:

• Direct engagement with raw material suppliers to optimize sourcing
• Target outcome: cost parity with comparable EPS products at scale

Technology readiness level

Cruz Foam's chitosan foam technology is at an advanced stage of development. Mechanical performance has been validated against EPS benchmarks, and compostability certification has been achieved for multiple product variants. Manufacturing processes including thermoforming, die-cutting, and laminating have been proven viable.

The primary remaining development work focuses on surface treatment to achieve water and oil resistance, followed by FDA food contact safety certification and BPI (Biodegradable Products Institute) compliance. Once viable surface treatment methods are identified, the company plans to develop continuous and scalable manufacturing techniques for applying these treatments. Cost optimization through supply chain partnerships remains ongoing to achieve parity with conventional EPS pricing.