Applications of LOTTE Chemical SEETEC VA930 EVA in Industrial Manufacturing

LOTTE Chemical SEETEC VA930 EVA demonstrates consistent performance in demanding industrial environments, providing material advantages to manufacturers across multiple specialized downstream sectors. Below are implementation scenarios reflecting industrially validated, large-volume applications, with detailed process and compliance criteria for each sector.

1. Photovoltaic Encapsulant Film Manufacturing

Industrial module manufacturers rely on SEETEC VA930 within lamination-stage encapsulant films to secure photovoltaic cells. The specific vinyl acetate content and melt flow rate ensure cell adhesion and stable light transmission, supporting field longevity under fluctuating temperature and moisture exposure.

Industry compliance standards

• IEC 61215: Terrestrial Photovoltaic (PV) Modules – Design Qualification and Type Approval
• UL 1703: Standard for Flat-Plate Photovoltaic Modules and Panels
• RoHS Directive 2011/65/EU compliance
• ISO 9001: Quality Management Systems (within film production facilities)

Typical usage ratio

• Employed at 70–90% of the total encapsulant film formulation by mass; the exact ratio shifts according to required cross-link density and film thickness for module class. Higher ratios address larger-area modules or more stringent field durability.

Downstream process integration

• Added during hot-melt extrusion prior to sheet calendaring; cross-linking additives and UV stabilizers blend with the material pre-extrusion. Encapsulant sheet proceeds to lamination under vacuum with photovoltaic cell circuits between glass superstrate and backsheet assembly.

Final product types

• Photovoltaic encapsulant films for crystalline silicon and thin-film PV modules
• Double-glass encapsulants for bifacial solar panels
• Backsheet-integrated solar panels in building-integrated photovoltaics (BIPV)
• Specialized encapsulant sheets for flexible PV modules

2. Hot Melt Adhesive (HMA) Production

Producers of industrial adhesives incorporate VA930 EVA to achieve rapid set times, tailored tack and flexural properties for packaging assembly, woodworking, and automotive lamination. The selected grade supports stable bond lines and formulation repeatability over multiple production shifts.

Industry compliance standards

• ASTM D3236: Standard Test Method for Apparent Viscosity of Hot Melt Adhesives
• FDA 21 CFR 175.105: Adhesives for indirect food contact (as applicable for packaging adhesives)
• REACH Regulation (EC) No 1907/2006 registration
• ISO 14001: Environmental Management Systems (for adhesive plants)

Typical usage ratio

• Comprises 30–60% of total HMA batch weight, with specific percentage determined by application sector—higher content for flexible packaging, lower for woodworking or rigid substrates. Adjusted alongside resin tackifiers and waxes for application viscosity and open time.

Downstream process integration

• Fed into batch mixers or continuous extruders alongside tackifiers, waxes, antioxidants, and UV protectants; compound blend melts at 120–180°C and disperses onto substrate, then solidifies upon cooling for line-speed assembly in packaging and product lamination.

Final product types

• Hot-melt adhesive gluesticks for packaging and bookbinding
• Laminate adhesives for automotive upholstery or textiles
• Assembly adhesives for woodworking and furniture panels
• Industrial labeling adhesives for continuous web applications

3. Wire & Cable Insulation Compounds

Electric cable manufacturers depend on the copolymer’s dielectric attributes for both insulation and sheathing layers, especially in low- to medium-voltage cables requiring pliability, moisture resistance, and reliable extrusion throughput. Satisfying regulatory and OEM specifications, this grade ensures conformity and defect-free insulation extrudate.

Industry compliance standards

• UL 1581: Reference Standard for Electrical Wires, Cables, and Flexible Cords
• IEC 60502: Power cables with extruded insulation
• RoHS Directive 2011/65/EU (lead, cadmium, and halogen content limits)
• ISO/IEC 17025: Laboratory Requirements for Cable Testing (for certified manufacturing sites)

Typical usage ratio

• Utilized at 40–85% by total insulation compound mass, formulation adjusted according to voltage class and target flexibility. Lower end of the range for fillers-heavy compositions, higher for high-flex cabling or where flame retardant additives are minimized.

Downstream process integration

• Compounded with stabilizers, colorants, and flame-retardants in high-shear mixing extruders; melt-pelletized or direct-fed to cable extrusion lines for continuous coating over copper or aluminum wire. Downstream vulcanization, stranding, or jacketing processes follow substrate insulation.

Final product types

• Insulated building wires and appliance cables (PVC-free)
• Flexible data and communications cables
• Automotive low-voltage wire harnesses
• Moisture-resistant outdoor cable sheathing compounds

4. Foam Shoe Sole and Footwear Materials

Footwear raw material producers employ the resin as a key component in foamed EVA compounds for midsoles and outsoles, targeting sports and safety shoes requiring low weight, elastic recovery, and resistance to tear or environmental degradation. Manufacturing lines secure uniform cell structure and consistent physical properties batch-to-batch.

Industry compliance standards

• ISO 20344: Personal protective equipment—Test methods for footwear
• REACH Regulation (EC) No 1907/2006 substance registration
• ISO 9001 implemented on footwear component manufacturing lines
• EN 61340-4-3: Electrical resistance of footwear (for antistatic safety shoes)

Typical usage ratio

• Represents 50–75% of blown foam compound mass; precise loading determined by desired hardness (Shore A), expansion rate, and balance with rubber, blowing agent, or cross-linking ingredients for each shoe model or application.

Downstream process integration

• Added with cross-linkers, blowing agents, and colorants into batch mixers; processed in compression or injection molding lines, followed by foaming in open or closed molds. Final steps include post-expansion heat set and trimming to maintain dimensional tolerances.

Final product types

• Sports and athletic shoe midsoles
• Comfort-oriented casual and sandal outsoles
• Safety footwear (antistatic, oil-resistant, or energy-absorbing soles)
• Industrial work boot soles with defined slip and abrasion resistance

5. Flexible Film and Packaging Sheet Fabrication

Packaging film converters select VA930 EVA for film structures that must provide cling, puncture strength, and transparency, including stretch or shrink film. Its performance supports rapid line speeds and consistent thickness profiles, maintaining pack integrity from high-speed food and industrial packaging equipment.

Industry compliance standards

• FDA 21 CFR 177.1350: Ethylene-vinyl acetate copolymers (for food contact applications)
• EU Regulation No 10/2011: Plastics materials in contact with food
• ISO 22000: Food Safety Management Systems (for packaging converters supplying the food industry)
• ASTM D882: Standard Test Method for Tensile Properties of Thin Plastic Sheeting

Typical usage ratio

• Used at 10–25% of LDPE-based film blends, higher levels (up to 40%) in single-layer operations or when maximizing elasticity and sealing. Adjusts based on film gauge, target performance, and compliance with food-contact restrictions.

Downstream process integration

• Metered into blown or cast film extrusion with polyolefins, slip agents, and antiblock additives. Film formation occurs under cooled air rings or water quench, followed by slitting, winding, and conversion into bags, liners, or wrap rolls fit for automated packaging machinery.

Final product types

• Food-grade cling wrap and shrink films
• Pallet stretch films for bulk packaging
• Flexible liners for industrial and agricultural use
• Multi-layer vacuum packaging films

6. Rubber Modification in Bitumen Road Surfacing

Civil engineering and asphalt modifier suppliers introduce the copolymer to bitumen blends to increase elasticity, fatigue resistance, and cold weather flexibility for paving applications. The tailored VA content and viscosity support durable asphalt concrete performance under varied climate stress and heavy vehicle loads.

Industry compliance standards

• EN 14023: Bitumen and bituminous binders—Specification framework for polymer modified bitumens
• ASTM D5976: Standard for EVA-copolymer modified asphalt binder
• ISO 9001 as implemented in polymer modification blending plants
• AASHTO M320: Performance-Graded Asphalt Binder (North American road projects)

Typical usage ratio

• Incorporated at 2–5% by weight of total asphalt binder, percentage adjusted by regional climate (lower in temperate, higher in cold or high-stress roads) and project-specific performance grade (PG) targets.

Downstream process integration

• Introduced during asphalt binder preparation in high-shear mixing tanks at 150–180°C; achieves homogeneous dispersion before blending with aggregate and transport to paving sites. Continuous quality assurance checks focus on elastic recovery and viscosity curves pre-application.

Final product types

• Polymer-modified asphalt concrete paving materials
• High-flexibility road and highway overlays
• Airport runway surfacing binders
• Cold-climate expansion-resistant streets and parking areas