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

Sumitate KC-10, an ethylene-vinyl acetate copolymer produced by Sumitomo Chemical, finds wide adoption in key downstream sectors requiring precise control of material properties for demanding processing and regulatory conditions. Below we outline select application fields based on actual industry usage, detailing compliance, formulation guidance, integration methods, and resulting products for each manufacturing context.

1. Photovoltaic Module Encapsulation

Photovoltaic manufacturers have established KC-10 as a preferred encapsulation resin to ensure protection of solar cells against moisture ingress, UV degradation, and mechanical stress. Its high melt flow and controlled vinyl acetate content support lamination speed and cell adhesion, directly impacting module reliability and line yield. Production plants using KC-10 must align with rigorous international performance and safety norms linked to solar energy markets.

Industry compliance standards

• IEC 61215:2016 (Crystalline silicon terrestrial photovoltaic modules)
• IEC 61730:2016 (Photovoltaic module safety qualification)
• UL 1703/UL 61730 (USA safety for flat-plate PV modules)
• RoHS Directive 2011/65/EU (Restriction of hazardous substances)

Typical usage ratio

• Each module uses KC-10 at 400–550 g/m² encapsulant per laminate, representing approximately 18–22% by module weight. Exact ratio depends on cell spacing, glass size, and adhesion requirements.

Downstream process integration

• Converting EVA resin into compounded extruded sheets with curing agents, then placing these sheets in module layup and feeding into vacuum laminators at 145–155°C for 18–25 minutes.

Final product types

• Mono-crystalline and polycrystalline solar panels for rooftops, utility-scale solar PV modules, building-integrated photovoltaics.

2. Hot Melt Adhesive Formulations

Industrial adhesive producers routinely employ KC-10 for manufacturing pressure-sensitive and packaging grade hot melt adhesives. Its flexibility and compatible melt viscosity contribute to improved tack, cohesive strength, and broad performance windows, particularly in automated high-speed assembly and case/carton sealing lines. All adhesive production operations must control purity, emissions, and product safety per end-use segment regulations.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for food packaging indirect contact)
• EU Regulation No 10/2011 (Plastic materials and articles in contact with food – adhesives)
• ISO 9001:2015 (Quality management for adhesive plants)
• Directive 94/62/EC (Packaging and packaging waste)

Typical usage ratio

• KC-10 comprises 25–45% of the adhesive mass, with actual ratio adjusted based on required open time, set time, and substrate surface energy.

Downstream process integration

• Blending KC-10 with waxes, tackifiers, and stabilizers in high-shear mixers followed by extrusion and pelletizing or direct drum-filling for end-user melting applications.

Final product types

• Hot-melt adhesive sticks, industrial glue pellets, food-grade carton sealing glues, nonwoven hygiene adhesive formulations.

3. Foam Shoe Sole and Midsole Compounding

Footwear processors select KC-10 as a major constituent in EVA-based foam structures for sports and leisure shoes. Its particle uniformity and vinyl acetate profile enhance expansion efficiency, cell structure consistency, and compression set, critical for both injection and compression molding systems. Downstream plants must address safety and physical testing mandates imposed by global branded footwear supply chains.

Industry compliance standards

• ISO 20871:2018 (Footwear—Test methods for outsoles—Abrasion resistance)
• REACH Regulation (EC) No 1907/2006 (Chemical safety for consumer articles in Europe)
• GB/T 15107-2013 (China—sports shoes standard)
• Brand owner Restricted Substances Lists (Nike, Adidas, etc.)

Typical usage ratio

• KC-10 serves as the primary polymer at 55–75% of total compound weight. The ratio is tuned based on foam density targets, mechanical performance, and combination with natural fillers and additives.

Downstream process integration

• Dry blending with blowing agents and crosslinkers, followed by injection or press molding at 150–170°C to achieve microcellular expansion and finished profile.

Final product types

• Lightweight sports shoe soles, midsoles, sandal footbeds, children’s shoe components.

4. Cable Insulation and Sheathing Compounds

Electrical cable compounders value KC-10 for achieving critical combinations of flexibility, stress crack resistance, and dielectric stability needed in low- and medium-voltage power, data, and automotive wire applications. Sumitate KC-10’s parameter control permits reliable co-extrusion with flame retardants and pigment systems, supporting rigorous long-term testing and real-world deployment of finished cables.

Industry compliance standards

• IEC 60502 / IEC 60811 (Cables for rated voltages up to 30 kV)
• UL 1581 (Reference standard for electrical wires, cables, and flexible cords)
• RoHS Directive 2011/65/EU (Lead-free and hazardous substance controls)
• ISO 14001:2015 (Environmental management of cable production sites)

Typical usage ratio

• KC-10 comprises 45–65% of the final insulation/sheath compound, adjusted to end-use flexibility, mechanical durability, and flame retardance targets.

Downstream process integration

• Compounding with fire retardants, antioxidants, and color concentrates using twin-screw extrusion, then feeding melt blend into cable jacketing or core insulating lines.

Final product types

• Electrical wire insulation, automotive low-tension cable jackets, LAN/communication cable outer sheaths, control cable coatings.

5. Film Casting for Flexible Packaging

Packaging converters integrate KC-10 into co-extruded flexible films to engineer improved sealing, puncture resistance, and clarity in food and medical-grade wrap. Its compatibility with other polyolefins and consistent melt properties allow for stable high-speed production and tight thickness tolerances. Manufacturers must conform to end-market safety and migration requirements for sensitive packaged goods.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymers in contact with food)
• EU Regulation No 10/2011 (Plastics intended for food contact)
• GMP Regulation (EC) No 2023/2006 (Good manufacturing practice—food packaging)
• Japanese Food Sanitation Act (Ministry of Health, Labour and Welfare Notification No. 370)

Typical usage ratio

• KC-10 added at 4–15% of the film formulation by weight, proportion selected according to target sealing temperature window, flexibility, and multilayer compatibility.

Downstream process integration

• Feeding raw KC-10 along with linear low-density polyethylene and other resins into cast or blown film extruders, then chill rolling and surface treatment as required.

Final product types

• Food pouches, medical device packaging films, flexible laminates for snacks, stand-up pouches, heat-sealable lidding films.