Applications of Celanese Ateva 1231 EVA in Industrial Manufacturing

Celanese Ateva 1231 EVA plays a functional role in manufacturing processes where precise formulation control, excellent mechanical performance, and reliable process integration are required. Below, we outline key industrial scenarios that reflect actual and effective use of this material in globally regulated downstream sectors, with a focus on distinct compliance, recipe standards, process entry points, and the resulting end-user products.

1. Encapsulant Films for Photovoltaic Modules

This grade of EVA is routinely utilized in producing encapsulant films used as protective layers in solar cell modules, where high optical clarity, strong crosslinking performance, and excellent adhesion to both glass and solar cells are critical for long-term durability. The material’s formulation flexibility allows precise adjustment of melt flow for thin film extrusion, meeting global performance requirements in high-output solar panel production lines.

Industry compliance standards

• IEC 61215 (Crystalline Silicon Terrestrial Photovoltaic (PV) Modules Design Qualification and Type Approval)
• IEC 61730 (Photovoltaic Module Safety Qualification)
• UL 1703/UL 61730 (US PV Standard)
• RoHS Directive (EU Restriction of Hazardous Substances)

Typical usage ratio

• 70%–100% as the base polymer in the encapsulant film; remainder includes crosslinking agents, stabilizers, and UV absorbers. Formulation ratio varies by film thickness and specific cell technology.

Downstream process integration

• Material is introduced directly into the melt extrusion process for film casting. After extrusion, the film is laminated between glass and cells, followed by curing in an autoclave or vacuum lamination to achieve optimal crosslinking and adhesion.

Final product types

• Photovoltaic encapsulant films
• Backsheet composite structures
• Flexible solar modules

2. Hot Melt Adhesive Formulations

This copolymer is widely adopted by industrial adhesive manufacturers for producing hot melt adhesives used in packaging, bookbinding, and woodworking. The material’s controlled vinyl acetate content ensures reliable tackiness, fast setting, and strong bonding on a range of polar and non-polar substrates. The predictable melt behavior and compatibility with waxes and tackifiers make it a preferred backbone resin in adhesive blends.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for Food Packaging in the US)
• REACH Regulation EC 1907/2006
• EN 923:2015 (European Adhesive Terminology and Test Methods)

Typical usage ratio

• 15%–45% as the primary polymer in the hot melt compound, adjusted based on required open time, flexibility, and viscosity. Ratios depend on compatibility with oils, waxes, and resins used as modifiers.

Downstream process integration

• Added during high-shear batch mixing, then pelletized or processed through hot melt coating and extrusion equipment to produce adhesive granules, sticks, or blocks.

Final product types

• Hot melt adhesive sticks and granules
• Pressure-sensitive adhesive tapes
• Bookbinding glues
• Case and carton sealing adhesives

3. Flexible Packaging Films

EVA's key role in co-extruded multilayer films, especially for food and medical product packaging, stems from its high clarity, sealability at low temperature, and ability to provide impact resistance. The copolymer is specified as a functional layer that enhances printability and thermal properties when integrated with LDPE, LLDPE, or barrier resins, responding to both mechanical and regulatory demands in high-throughput packaging production.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-Vinyl Acetate Copolymers for Food Contact)
• EU 10/2011 (Plastics Regulation on materials intended for food contact)
• China GB 9685-2016 (Standards for Additives in Food-Contact Materials and Articles)
• BRCGS Packaging Materials (Global Packaging Safety Standard)

Typical usage ratio

• Between 10% and 25% in multilayer film structures, typically as a sealant or tie layer. Adjustments depend on required sealing strength, puncture resistance, and clarity for the target market.

Downstream process integration

• Fed into blown or cast film extrusion lines, usually co-extruded with polyethylene or barrier polymers to create multilayer films before being cut and converted to packaging formats.

Final product types

• Food-grade flexible packaging films and bags
• Medical pouch films
• Lidding films
• Vacuum packaging laminates

4. Wire & Cable Insulation Compounds

The controlled melt index and high purity of this EVA make it suitable as the key resin in jacketing and insulation compounds for low-voltage electrical cables. The material imparts superior flexibility, low-temperature performance, and robust electrical insulation while remaining within hazardous substance limits demanded by telecom and construction sectors. Downstream cable compounders rely on tight process control to ensure extrusion stability and consistent mechanical properties.

Industry compliance standards

• IEC 60502 (Power Cables with Extruded Insulation)
• RoHS Directive (Restriction of Hazardous Substances)
• UL 1581 (Electrical Wires, Cables, and Flexible Cords Test Methods)
• EN 50363-3 (EVA sheathing compounds for cables)

Typical usage ratio

• 40%–70% by weight in cable insulation and sheathing compound recipes, with balance occupied by flame retardants, fillers, and stabilizers. The exact loading is determined by target mechanical and flame resistance performance.

Downstream process integration

• Premixed and compounded in internal mixers, then extruded onto conductor wires using continuous extrusion lines; downstream enameled or crosslinked (where required) and cooled before final spooling.

Final product types

• Low-voltage power cable insulation
• Data and telecom cable jackets
• Flexible appliance cords
• Underground and automotive wiring insulation

5. Footwear Injection Molding Compounds

This grade is adopted by footwear manufacturers as a primary matrix resin for producing midsoles and outsoles in sports and casual shoes via foam injection molding. The formulation flexibility allows manufacturers to adjust softness, resilience, and weight, meeting the specific needs of athletic and lifestyle brands. Key value comes from high rebound characteristics and reliable cell structure control achieved through batch blending and optimally balanced crosslinking agents.

Industry compliance standards

• ISO 9001 (Quality Management Systems for Manufacturing)
• EN 71-3 (Safety of Toys: Migration of Certain Elements, relevant to children's footwear)
• REACH Regulation (EC) No 1907/2006

Typical usage ratio

• 45%–85% as the core polymer in the foamed injection compound. Actual percentage set based on density and compression set targets; remaining fraction includes blowing agents and crosslinkers.

Downstream process integration

• Compounded in batch mixers with blowing agents, mold-releasing additives, and coloring. Introduced into injection molding machines, where controlled expansion produces midsole and outsole components with precise dimensional tolerances.

Final product types

• Sports shoe midsoles and outsoles
• Casual and leisure footwear soles
• Children’s shoe soles

6. Agricultural Greenhouse Film Production

EVA copolymers featuring elevated vinyl acetate content deliver light transmission and enhanced tear resistance for greenhouse film, tunnel covers, and agricultural mulch films. Specialist film extruders blend this grade to achieve high clarity and weatherability for controlled-environment agriculture, while maintaining industry-mandated performance and migration limits to ensure plant and food safety.

Industry compliance standards

• EN 13206 (Plastics Films for Agricultural Applications)
• ISO 18606 (Packaging and the Environment - Organic Recycling, relevant for biodegradable combinations)
• REACH Regulation compliance for agricultural films

Typical usage ratio

• Up to 30% as the functional layer in co-extruded greenhouse films; inclusion adjusted for desired thickness, strength, and optical properties, with the remainder being PE or specialty additives.

Downstream process integration

• Fed into blown film extrusion equipment, co-extruded with other polyolefins and light-diffusing additives, then slit and rolled for field deployment. Quality checks focus on transmittance and mechanical durability.

Final product types

• Greenhouse cladding films
• Agricultural mulch films
• Low-tunnel covering foils