Applications of ExxonMobil Escorene Ultra UL 7711 EVA in Industrial Manufacturing

Escorene Ultra UL 7711 EVA serves as a key polymeric material in multiple industrial sectors that demand high-performance, process-stable, and compliant resins. Our manufacturing expertise ensures batch consistency and tailored performance for rigorous downstream environments.

1. Photovoltaic Encapsulant Films

In the solar energy sector, EVA is the principal resin for making photovoltaic (PV) module encapsulant films. Our material provides well-controlled melt flow and clarity, enhancing mechanical adhesion and light transmission. Formulators blend it with stabilizers and crosslinking agents. It consistently passes reliability, UV resistance, and delamination criteria in PV module lamination processes. Line trials focus on compatibility with glass and various backsheet types for crystalline and thin-film panels.

Industry compliance standards

• IEC 61215: Terrestrial photovoltaic modules certification
• UL 1703: Flat-plate photovoltaic modules and panels
• IEC 61730: PV module safety requirements
• RoHS Directive 2011/65/EU

Typical usage ratio

• Composition: 75-90% EVA by weight, adjusted for desired film softness and tear resistance
• Crosslinking agent: typically 2-5%
• Additive package (UV absorbers, antioxidants): 1-3% total
• Ratio varies for module type and geographic installation requirements

Downstream process integration

• Introduced at film extrusion step during flat die or blown film processing
• Lamination: co-extruded with additives prior to stacking in PV assembly
• Thermal curing: initiates crosslinking to set mechanical properties
• Inline QA: monitored for shrinkage, gel content, and optical transmittance

Final product types

• Packed EVA encapsulant film rolls for solar module laminators
• Integrated multi-layer encapsulant sheet composites
• Finished crystalline silicon and thin-film solar modules
• Bifacial solar panels with dual-side encapsulants

2. Hot Melt Adhesive Formulations

Major packaging and woodworking sectors incorporate this EVA for hot melt adhesive (HMA) manufacture because of its clean extrusion and precise control over viscosity. Our resin is preferred for both pressure-sensitive and non-pressure-sensitive HMAs, fulfilling requirements from carton sealing tape to bookbinding. The open time and set time are tuned by adopting resin blends, waxes, and tackifiers, with attention to food contact safety for consumer packaging.

Industry compliance standards

• FDA 21 CFR 175.105: Adhesives for food packaging
• REACH Regulation (EC) No 1907/2006 compliance
• GB9685-2016: Chinese food contact additive standard
• ISO 9001: Production quality management system

Typical usage ratio

• Base polymer: 20-40% EVA by weight depending on required flex modulus
• Tackifiers: 30-50% for adhesion tuning
• Waxes: 10-20% for viscosity control
• Ratio adjusted for hot melt gun, extrusion, or slot-coat application

Downstream process integration

• Incorporated in industrial mixers during adhesive compounding
• Melted and blended with tackifiers, resins, and additives under controlled shear
• Granulated, extruded, or block-molded for shipment to end-users
• Batch QC verifies viscosity, setting time, and color stability

Final product types

• Packaging and case-sealing hot melt sticks and pellets
• Bookbinding adhesive blocks
• Pressure-sensitive adhesive rolls and tapes
• Woodworking edge-banding HMAs

3. Wire and Cable Insulation Compounds

EVA finds critical use in flame-retardant and low-smoke wire and cable insulation formulations. Compounders select this grade for its balance of flexibility, breakdown voltage, and ease of compounding with conventional fire retardant fillers such as ATH (aluminum trihydrate). Its melt processability and low halogen emission meet the expectations of power cable, building wire, and data cable applications. Formulation goals include achieving rated dielectric properties and mechanical robustness after extrusion and irradiation curing.

Industry compliance standards

• IEC 60502-1: Power cables with extruded insulation
• UL 1581: Electrical wires, cables, and flexible cords
• EN 50267: Low halogen emission assessment
• RoHS Directive 2011/65/EU

Typical usage ratio

• EVA: 25-45% by weight in insulation compounds
• ATH flame retardant: 50-60%
• Plasticizers, stabilizers: 2-8% for processability and durability
• Ratio adjusted according to voltage rating and flexibility target

Downstream process integration

• Blended during high-shear Banbury or Buss compounding
• Pelletized and dried before cable extrusion
• Applied via continuous crosshead extrusion onto bare copper/aluminum conductors
• Irradiation or steam curing steps depending on end use

Final product types

• Building wire, LV/MV power cables
• Halogen-free data and control cables
• Flexible appliance wiring insulation
• Automotive wire harnesses

4. Foam Slipper and Footwear Soling Materials

Footwear manufacturers incorporate this EVA to create injection-molded foam sheets and midsoles. The controlled VA content ensures correct balance of compression, resilience, and density, supporting production of athletic, casual, and safety shoe midsoles. Expanders and crosslinkers are precisely metered to match end-use softness or rebound, and process parameters are set for consistent pore size and surface slip resistance. Resulting foams withstand high-load mechanical and repetitive motion testing.

Industry compliance standards

• ISO 20344: Footwear testing methods
• ISO 9001: Quality management for footwear production
• GB 30585-2014: Safety specifications for children's shoes (China)
• REACH Annex XVII: Restricted substances

Typical usage ratio

• Base EVA: 60-90% by weight
• Foaming agent: 3-6%
• Crosslinking agent: 1-2%
• Colorants and antistatics: up to 2%

Downstream process integration

• Dry blending in paddle mixers prior to extrusion
• Extruded or injection-molded into sheet or complex sole molds
• Thermal crosslinking and foaming in closed-press molds
• Processed sheets die-cut or CNC-milled to final shape

Final product types

• Sports shoe midsoles (running, training)
• Open and closed cell foam slippers/sandals
• Work boot cushioning layers
• Custom orthopedic shoe insoles

5. Film Casting for Flexible Packaging

The food and consumer goods packaging industries use this resin in multilayer film casting, especially where clarity, softness, and heat-sealing performance are key. Compounders integrate it for lid films, laminates, and co-extruded structures with PE or other polymers. The VA level supports consistent sealing at lower temperatures and simplifies anti-fogging and easy-peel lid design for refrigerated and shelf-stable packaging applications.

Industry compliance standards

• FDA 21 CFR 177.1350: EVA copolymer, food contact
• EU Regulation No 10/2011: Plastics for food contact
• China GB 4806.6-2016: Food contact plastic resins
• ISO 22000: Food safety management

Typical usage ratio

• EVA: 10-40% in co-extruded polyolefin films (core or skin layer)
• Antifog/antiblock/slip additives: 0.1-2%
• Tie resins/adhesives for multilayer structures: application-dependent
• Ratio selected for sealing property, transparency, and peel force

Downstream process integration

• Direct feeding into film extruders or cast film lines
• Layered as skin or tie layer with polyolefin substrates
• Inline blending possible for additive adjustment
• Slitting, punching, or die-cutting for customized format

Final product types

• Resealable lid films for yogurt and dairy
• Thermoformed meat and cheese trays
• Flexible snack and produce pouches with zip closure
• Blister lidding for pharmaceuticals