Plastic-Free, Heat-Activatable Zein Adhesive for Water-Resistant Fiber and Multi-Material Assemblies

BondAmaize™ is a versatile, plant-based adhesive technology developed by GluECO Adhesives LLC using zein, a naturally occurring protein extracted from corn. It offers an alternative to petroleum-derived adhesives by combining zein’s adhesive, film-forming, hydrophobic, and thermoplastic properties with formulation flexibility for diverse industrial applications.

VERSATILITY AND APPLICATIONS

BondAmaize has demonstrated adhesion to fiber-based materials, wood, textiles, metals, selected plastics, and challenging low-surface-energy substrates. Potential applications include paper and paperboard packaging, molded fiber, corrugated products, flexible laminates, engineered wood, nonwovens, natural-fiber composites, metal-to-fiber assemblies, and specialty industrial bonding.

Applications include paper-to-paper and paper-to-film lamination, heat-sealable structures, fiberboard assembly, and textile bonding. Its ability to adhere to both porous and nonporous substrates creates opportunities for mixed-material structures.

TUNABLE ADHESIVE PROPERTIES

BondAmaize is a formulation platform rather than a single-purpose adhesive. Formulations can be tailored for substrate adhesion, cohesive strength, tack, open time, set profile, viscosity, flexibility, film integrity, moisture and grease resistance, and processing conditions.

Options include cold-set laminating adhesives, heat-activated and heat-seal systems, high-tack or permanent bonds, and water-dispersible adhesives designed for fiber recovery. Zein’s thermoplastic behavior enables heat activation, with typical heat-seal initiation temperatures of 80–130°C (176–266°F), depending on the formulation. Performance at a specified service temperature is evaluated separately from activation temperature.

BondAmaize can be applied using established converting methods, including Meyer-rod, gravure, spray, roll coating, slot-die, and heat-seal equipment. Drying may be ambient or forced-air, adjusted to suit the substrate and process.

SUSTAINABILITY AND CERTIFICATION

BondAmaize has earned USDA Certified Biobased Product recognition; company materials report 98% biobased content for the certified adhesive. Zein is derived from corn gluten meal, a coproduct of corn starch production, using an agricultural coproduct.

The platform offers plastic-free and PFAS-free formulations, with VOC-free options available. Adhesives can be designed for biodegradability, compostability, repulpability, or water dispersibility, supporting fiber recycling and circular packaging concepts. End-of-life performance and food-contact suitability must be confirmed for the specific formulation and finished article.

DEVELOPMENT AND COLLABORATION

BondAmaize has advanced beyond initial concept development, with adhesive functionality demonstrated across multiple substrate categories. It is supported by FloZein Products, a U.S. zein manufacturer with 50 years of commercial production experience, providing formulation expertise and an established domestic raw-material supply.

GluECO welcomes collaboration with adhesive manufacturers, packaging converters, and industrial product developers on tailored formulations, comparative bond testing, aging and moisture evaluations, pilot trials, process integration, commercial supply, and licensing. The goal is to meet application-specific performance and cost requirements while reducing reliance on conventional synthetic adhesives.