Applications of Sumitomo Chemical Sumitate HC-10 EVA in Industrial Manufacturing

Sumitate HC-10 EVA is a high-quality ethylene vinyl acetate copolymer developed for demanding industrial applications. Our manufacturing expertise enables consistent performance across diverse sectors, supporting both process efficiency and product functionality.

1. Photovoltaic Encapsulant Films Production

EVA resins from the HC-10 grade serve in the lamination of photovoltaic (PV) modules, providing insulation, adhesion, and long-term UV stability. Sheet extrusion and subsequent crosslinking optimize light transmittance and module durability. Manufacturers use our material to achieve precise melt flow for uniform film thickness and minimal gel content, critical for optical clarity and production yield in high-throughput PV line operations.

Industry compliance standards

• IEC 61215 (Photovoltaic module qualification)
• UL 1703 (Standard for Flat-Plate PV Modules and Panels)
• RoHS Directive (2011/65/EU) on hazardous substances
• REACH Regulation (EC) No 1907/2006

Typical usage ratio

• Used at 100% of encapsulant layer formulation for monolayer films
• Blending with UV/light stabilizers at 0.2–2% depending on UV exposure level
• Crosslinking aid (e.g., peroxide) added at 1–3% to enhance module stability
• Varied thickness from 0.4 to 0.8 mm according to module type

Downstream process integration

• Feeds directly into twin-screw extruders for film casting
• Converts to sheet via calendaring and then laminated onto PV cells
• Undergoes crosslinking by autoclaving at 140–150°C
• Integrated inline optical inspection before module assembly

Final product types

• Monofacial and bifacial solar panel modules
• Building-integrated photovoltaic (BIPV) panels
• Transparent encapsulant sheets for specialty PV devices
• Flexible portable photovoltaic modules

2. Hot Melt Adhesive Formulation

Our HC-10 grade is used as a base polymer for hot melt adhesives in packaging, bookbinding, and hygiene markets. It imparts flexibility, low-temperature performance, and strong substrate bonding. Manufacturers precisely control the vinyl acetate content to optimize open time, set time, and tack as required by each downstream application.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for food contact packaging)
• EN 923 (European hot melt adhesive test methods)
• ISO 9001 (Adhesive manufacturing quality management)
• REACH SVHC compliance for restricted chemicals

Typical usage ratio

• 50–60% EVA copolymer by total hot melt formulation by weight
• Blended with 20–40% tackifying resins and 10–20% plasticizers as per substrate requirements
• Waxes and stabilizers added at 1–3% depending on thermal stability needs
• Adjust ratios to achieve target viscosity, open time, and adhesion strength

Downstream process integration

• Pellets metered into heated mixing tanks for compounding with additives
• Dispersed under controlled agitation to prevent scorching and gel formation
• Extruded as pellets, sticks, or granules for end-use
• Applied via spray, bead, or slot-die in high-speed production lines

Final product types

• Case and carton sealing adhesives
• Spine glues for bookbinding
• Disposable hygiene product adhesives (diapers, sanitary pads)
• Wood edge banding adhesives

3. Wire and Cable Insulation Compounds

Manufacturers rely on HC-10-based insulation compounds to achieve precise melt flow, elongation, and dielectric properties required in flexible wire and cable jacketing. Compounding with specialty additives and flame retardants ensures regulatory compliance and enables automated wire extrusion, essential for telecom, automotive, and appliance applications.

Industry compliance standards

• UL 83 (Thermoplastic-insulated wires and cables)
• IEC 60502-1 (Power cables with extruded insulation)
• RoHS 2011/65/EU (Restriction of hazardous substances in electrical equipment)
• CSA C22.2 No. 75 (Thermoplastic-insulated wires and cables)

Typical usage ratio

• 35–55% EVA by total compound weight, based on required flexibility
• Flame retardants added at 20–40% for insulation rated FT1/FT2
• Antioxidants and processing aids at 1–3% as required for line speed
• Tuning ratios supports UL/IEC cable type certification

Downstream process integration

• Blended with fillers and functional additives in internal mixers
• Pelletized by extrusion and cooled for downstream storage
• Fed to cable insulation extrusion lines with tight temperature control
• Formed as outer or inner sheathing layers in continuous processing

Final product types

• Control and power cables (low voltage)
• Automotive thin-wall wiring insulation
• Appliance cords and plugs
• Telecom cable jackets

4. Foam Sole and Footwear Material Manufacturing

Footwear manufacturers employ HC-10 in injection and compression molding of midsole and outsole foams, where it provides resilience, lightweight cushioning, and shock absorption. Adjusting vinyl acetate content and foaming agent levels produces varying softness profiles required for athletic, casual, and children’s footwear.

Industry compliance standards

• REACH (EC) No 1907/2006 for safe chemical use in finished items
• ISO 20344 (Footwear testing methods)
• GB 28011-2011 (Safety for children’s footwear in China)
• PROP 65 (California Proposition 65 for safe consumer goods)

Typical usage ratio

• 70–95% EVA in foam blend by weight, with adjustment for closed- or open-cell structure
• Foaming agent content from 2–6% based on desired density
• Colorants and crosslinking agents at 1–3% as required by footwear type
• Filler minerals (e.g., calcium carbonate) at 5–10% for cost control

Downstream process integration

• Compounded with foaming and crosslinking agents in batch or continuous mixers
• Sheeted or pelletized and pre-cured as required
• Injected or compressed into sole molds at 140–160°C
• Post-mold trimming and surface finishing as needed

Final product types

• Sports shoe midsoles
• Beach sandals and flip-flops
• Children’s shoes with soft soles
• Antistatic and work boot outsoles

5. Film and Sheet for Food Packaging

Processing facilities use our HC-10 formulation to co-extrude flexible films for food packaging, where clarity, sealing temperature range, and puncture resistance are key. Careful process control delivers high-yield rolls for conversion and printing while meeting stringent hygiene benchmarks for direct food contact.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymers in food packaging)
• EU Regulation No 10/2011 (Plastics intended to contact food)
• GMP Regulation (EC) 2023/2006 for material processing
• ISO 22000 (Food safety management systems for packaging manufacturers)

Typical usage ratio

• 10–30% EVA in multilayer structures; higher content for enhanced sealability or flexibility
• Combined with LDPE, LLDPE, or barrier resins in co-extrusion
• Performance modifiers and slip agents added as needed, generally 1–2%
• Adjust ratios for target film gauge and heat sealing temperature range

Downstream process integration

• Dosed into film or sheet extrusion with accurate gravimetric feeders
• Co-extruded to form multilayer food contact films
• Inline corona or flame treatment for printability or lamination
• Slit, rolled, and inspected prior to shipment for conversion

Final product types

• Vacuumable packaging films for meat and cheese
• Resealable bread bags
• Frozen food packaging pouches
• Flexible lidding films for dairy and ready meal containers

6. Masterbatch Carrier Resin for Additive Dispersion

Producers of color and additive masterbatches select our HC-10 grade as a carrier resin for its compatibility with pigment and additive chemistries. The product’s controlled viscosity provides high dispersion efficiency, ensuring stability and batch-to-batch uniformity in downstream use for molded and extruded plastics.

Industry compliance standards

• ISO 9001 (Quality management for compounding process control)
• FDA 21 CFR 177.1520 & 177.1350 (Color concentrate carriers for indirect food contact in plastics)
• EU Regulation 2023/2006 (GMP for plastics masterbatch manufacturing)
• ASTM D1603 (Carbon black content in olefin plastics masterbatches)

Typical usage ratio

• Masterbatch typically contains 40–60% filler, pigment, or active ingredient; balance is carrier EVA
• Carrier resin dosage varies by pigment or additive loading requirements
• Antioxidants and dispersing aids, usually 0.5–2%, to stabilize high-shear processing
• Formulation adjusted by end-use polymer compatibility and performance target

Downstream process integration

• Pelletized after high-shear compounding in twin-screw extruders
• Fed into film, molding, or fiber lines as color/additive concentrates
• Ensures even pigment and additive dispersion during end-use polymer melt processing
• Supports quick dye changes and material switching in converter operations

Final product types

• Colored PE, PP, and EVA films and sheets
• Stabilized and antistatic plastics
• Degradable and biodegradable functional plastics
• UV-blocking agricultural films