Overview
EAA (Ethylene Acrylic Acid) series engineering plastics are thermoplastic copolymers combining ethylene and acrylic acid monomers. These materials are prized for their exceptional adhesion properties, flexibility, and resistance to chemicals and environmental stress. Developed as an alternative to traditional adhesives and coatings, EAA plastics are widely used in industries requiring strong bonding and durability. EAA grades vary in acrylic acid content (typically 3–20%), which directly influences adhesion strength and compatibility with substrates like metals, paper, and other polymers. Their versatility makes them a preferred choice for multilayer films, hot-melt adhesives, and corrosion-resistant coatings.
Physical and Chemical Properties
EAA plastics exhibit a balance of mechanical and chemical properties. They have a low melting point (85–110°C), enabling easy processing via extrusion or injection molding. Their density ranges from 0.93–0.96 g/cm³, making them lightweight yet durable. The acrylic acid component provides polar functional groups, enhancing adhesion to polar surfaces. Chemically, EAA resists oils, greases, and weak acids but may degrade under prolonged UV exposure or strong oxidizing agents. Their solubility in hot hydrocarbons allows for use in solvent-based formulations. Thermal stability is moderate, with decomposition occurring above 250°C.
Main Applications
EAA plastics are extensively used in flexible packaging, particularly for food and medical products, where they serve as adhesive layers in multilayer films (e.g., PET/aluminum/PE structures). Their ability to bond dissimilar materials makes them ideal for laminates and pouches. In automotive and construction, EAA-based coatings protect metal parts from corrosion while providing noise reduction. The material is also a key component in hot-melt adhesives for furniture and footwear assembly. Emerging applications include 3D printing filaments and biodegradable composites.
Safety and Storage
EAA plastics are generally non-toxic and FDA-compliant for food-contact applications. However, overheating during processing can release acrylic acid vapors, requiring adequate ventilation. Dust formation during handling should be minimized to avoid respiratory irritation. Storage recommendations include keeping pellets in sealed containers below 30°C to prevent moisture absorption or clumping. Long-term exposure to humidity may affect processing performance. Fire hazards are low, but CO2 or dry chemical extinguishers are advised for emergencies.
B2B Procurement Guide
When procuring EAA plastics, specify the acrylic acid content (e.g., 5%, 9%, 15%) and melt flow rate (MFR, typically 1–20 g/10 min) to match processing methods like blow molding or extrusion. Key suppliers include Dow, ExxonMobil, and SK Global Chemical. Bulk pricing (e.g., 1-ton orders) often reduces costs by 10–15%. Verify certifications such as ISO 9001 or REACH compliance. For niche applications, request custom compounding services to optimize properties like UV stability or biodegradability.
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