Applications of Sumitomo Chemical Sumitate D3031 EVA in Industrial Manufacturing

Sumitate D3031 EVA from Sumitomo Chemical supports a wide range of industrial manufacturing processes where polymer flexibility, durability, and adhesive characteristics are required. As a producer, we strictly supply this grade into established downstream markets with precise operational standards, formulation protocols, and product integration requirements.

1. Photovoltaic Module Encapsulant Films

Photovoltaic manufacturers use this EVA as the primary encapsulation material for solar cell modules. D3031 ensures reliable lamination performance and protects sensitive photovoltaic cells against moisture and UV degradation during decades of outdoor exposure. During lamination, it melts and flows uniformly, minimizing the risk of air voids or non-wet-out zones, and enhances module power yield stability.

Industry compliance standards

• IEC 61215 (Crystalline silicon terrestrial PV modules – Design qualification and type approval)
• UL 1703 (Flat-plate Photovoltaic Modules and Panels)
• ISO 9001:2015 (Quality management systems for solar manufacturing)
• RoHS Directive (EU) 2015/863 (Hazardous substances restriction)

Typical usage ratio

• Film layer thickness: 400–600 µm per side (weight percent: 15–30% of total module BOM)
• Adjust thickness according to cell size and frame design

Downstream process integration

• Inserted between glass and solar cells pre-lamination
• Processed by roll laminator under vacuum and elevated temperature (140–150°C)
• Crosslinking via integrated initiators enhances long-term thermal resistance

Final product types

• Mono and polycrystalline PV panel encapsulant sheets
• Flexible solar cells for BIPV and portable power
• Thin-film PV modules

2. Cable Sheathing & Wire Compounds

Specialty wire and cable plants use D3031 for its excellent electrical insulation, elongation, and flame retardant compatibility. Manufacturers blend it with crosslinking agents to produce sheaths for low and medium-voltage wires and data cables requiring soft touch, good flex recovery, and enhanced durability. Co-extrusion and crosslinking produce stable and crack-resistant outer layers.

Industry compliance standards

• IEC 60502-1 (Power cables with extruded insulation and their accessories)
• UL 1581 (Reference Standard for Electrical Wires, Cables, and Flexible Cords)
• REACH Regulation (EC) No 1907/2006 compliance
• RoHS Directive (EU) 2015/863

Typical usage ratio

• EVA content: 18–28 wt% in PVC-based sheathing compounds
• Higher dosages provide increased flexibility for appliance cord grades
• Adjusted for target elongation and cold bend characteristics

Downstream process integration

• Mixed as pellet or powder into co-rotating twin-screw extruder lines
• Compounded with stabilizers and flame retardants before sheathing extrusion
• Used in crosslinkable cable insulation compounds with peroxide or silane systems

Final product types

• Flexible power cable sheaths
• Automotive wire insulation
• Data and telecom cables with UV-resistant jackets

3. Hot Melt Adhesive Formulations

Industrial adhesive manufacturers employ this EVA grade in the formulation of hot melt adhesives that require excellent adhesion to diverse polar and non-polar substrates, including packaging films, wood, and textiles. The raw material functions as the base polymer, offering adjustable open time and setting speed per requirements in bookbinding, carton sealing, and woodworking assembly lines.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for food packaging indirect contact)
• ISO 14001 (Environmental management in adhesive production)
• GB/T 26773-2011 (Hot melt adhesives—China national standard)
• REACH Regulation (EC) No 1907/2006

Typical usage ratio

• EVA backbone: 28–38% of adhesive batch
• Adjusted for softening point and viscosity modification with hydrocarbon resins and paraffin waxes
• Ratio tuned by final stickiness and peel strength requirements

Downstream process integration

• Melt blended in bulk tank reactors with plasticizers and tackifiers
• Granule, pillow, or block hotmelt supply formats for various end-user melting tanks
• Formulations extruded or molded into sticks for industrial use

Final product types

• Case and carton sealing adhesives
• Bookbinding hot melt glues
• Wood assembly and edge banding adhesives

4. Foamed Athletic and Footwear Soles

EVA-based foaming processes in footwear manufacturing rely on D3031 for lightweight midsoles, insole components, and outer sole products. This material imparts superior resilience, aging resistance, and shock absorbency, making it prominent among branded sport, leisure, and orthotic footwear. Manufacturers obtain stable closed-cell foams after compounding with blowing agents and processing in injection or compression molds.

Industry compliance standards

• ISO 20344:2021 (Personal protective equipment – Test methods for footwear)
• GB/T 3903.3-2011 (China Footwear—Physical properties testing)
• REACH Regulation (EC) No 1907/2006
• California Proposition 65 (applicable to products entering the US market)

Typical usage ratio

• EVA loading: 50–75 wt% of sole compound
• Ratio tailored by footwear style, target density, and mechanical performance
• Dynamically balanced with crosslinkers and expansion agents

Downstream process integration

• Blended as resin pellets with foaming agents in twin-screw compounding lines
• Melt injection or compression-molded to form soles and midsoles
• Post-foaming crosslinking for shape retention and compression set improvement

Final product types

• Sports shoe midsoles and insoles
• Children’s sneaker soles
• Work boot cushioning layers

5. Flexible Film and Sheet Extrusion (Packaging)

Converters in the flexible packaging sector use D3031 to produce films that offer puncture resistance, clarity, and sealability for fresh food, medical, and technical packaging. EVA enables high-speed blown or cast film extrusion, supports multiple heat sealing techniques, and prevents crack propagation during distribution and cold storage. Migration and extractable content align with regulatory requirements for food packaging contact.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymers for food contact)
• EU Regulation No 10/2011 (Plastics materials and articles intended to come into contact with food)
• ISO 11607-1:2019 (Packaging for terminally sterilized medical devices)
• China GB 9685-2016 (Additive standards for food-contact materials)

Typical usage ratio

• EVA rate: 6–18 wt% in flexible film blends
• Higher loading for cold resistance and enhanced seal strength
• Ratio fine-tuned by processability and gauge thickness

Downstream process integration

• Blown film lines: incorporated as granules into main hopper with LDPE/LLDPE
• Extruded as mono-layer or co-extruded for multilayer barrier films
• Post-extrusion corona or flame treatment for printability and lamination

Final product types

• Food pouch and wrap films
• Medical device packaging sheets
• Deep-freeze packaging

6. Masterbatch Carrier Resin

Producers of color and additive masterbatches for plastics rely on this EVA to disperse pigments, slip agents, antioxidants, and flame retardants. Its polarity ensures uniform distribution of functional additives, minimizing agglomeration. The carrier resin supports easy let-down into PE, PP, or specialty copolymer systems during downstream customer processing by film, extrusion, or molding converters.

Industry compliance standards

• ISO 9001:2015 (Quality management for compounding and masterbatch)
• FDA 21 CFR 178.3297 (Colorants for polymers with food contact)
• EU Regulation No 10/2011 (Plastic materials indirect food contact with carrier resins)
• China GB 9685-2016 Annex A (Authorized use of masterbatch carriers)

Typical usage ratio

• Masterbatch carrier: 50–75 wt% of total masterbatch formula
• Concentration based on pigment/additive type and target let-down efficiency
• Carrier selection driven by final application resin compatibility

Downstream process integration

• Melt-mixed with dispersants and pigments in kneader or twin-screw compounding extruder
• Cut into pellets and cooled for supply to downstream film, fiber, or injection molding operations
• Ensures homogeneous dispersion of additives at processor level upon dilution

Final product types

• Color and additive masterbatch pellets
• UV, flame retardant, slip, or antistatic masterbatches for film and sheet industries
• High-performance pigment dispersions for wire & cable compounders