Applications of Sinopec Zhongke UE2825 EVA in Industrial Manufacturing

Sinopec Zhongke UE2825 EVA plays a crucial role in several core manufacturing sectors that demand consistent processing performance and material compliance. As a direct producer, we support downstream clients in meeting exacting standards for final product quality, regulatory approval, and efficient production flow.

1. Photovoltaic Encapsulant Film Manufacturing

Manufacturers of solar panel encapsulant films select our UE2825 EVA for its high transparency, stable gel content, and controlled crosslinking behavior during lamination. Material batches allow integrated quality tracking from extrusion through crosslinking ovens, reducing module defects. In line process blending balances flow, adhesion, and optical criteria based on glass thickness and cell type.

Industry compliance standards

• IEC 61215: Terrestrial Photovoltaic Modules - Design Qualification
• UL 1703: Safety Standard for Flat-Plate Photovoltaic Modules and Panels
• RoHS Directive (2011/65/EU)
• REACH Regulation (EC 1907/2006)

Typical usage ratio

• 70-90 wt% EVA as primary encapsulant resin
• Small amounts of curing agent (1-2 wt%) and UV additives adjusted per film thickness

Downstream process integration

• Direct feeding to single-screw or twin-screw extruders for film extrusion
• Thermal crosslinking during module lamination
• Roll-to-roll quality control for haze, gel, and peel strength

Final product types

• Packed solar encapsulant films (EVA sheets, rolls)
• Monocrystalline and polycrystalline photovoltaic modules
• BIPV (Building Integrated Photovoltaic) laminates

2. Footwear Foam Injection and Molding

Industrial footwear producers favor this EVA for its balanced melt index and flexibility, supporting uniform foaming and high rebound in sports midsoles and safety soles. Production teams optimize compounding with fillers and crosslinkers according to hardness and wear requirements, ensuring batch-to-batch consistency and reduction of shrinkage defects after molding.

Industry compliance standards

• EN ISO 20345: Personal Protective Equipment – Safety Footwear
• GB/T 15107-2013: Rubber and plastic shoes for sport
• REACH Annex XVII (Phthalates and PAHs restrictions in footwear)
• California Proposition 65 Compliance

Typical usage ratio

• 45-75 wt% EVA base resin in foam compound
• 15-35 wt% inorganic filler (calcium carbonate or talc)
• Customized foaming agent and crosslinker levels per product type (0.5-3 wt%)

Downstream process integration

• Mixing and melt compounding with additives and blowing agents
• Sheet extrusion, calendering, or direct injection molding
• Post-molding cooling and precision trimming

Final product types

• Sports shoe midsoles and outsole sheets
• Anti-static and safety shoe bases
• Comfortable slippers and sandals

3. Hot Melt Adhesive (HMA) Formulation

Industrial formulators leverage this EVA to produce strong, fast-setting HMAs for packaging, woodworking, and hygiene disposable goods. The controlled VA content and melting properties facilitate predictable viscosity during blending with tackifiers and waxes, enabling repeatable line performance under dynamic process speeds and ambient conditions.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for food packaging)
• EN 923: Adhesives – Terms and definitions
• ISO 9001 Quality Management Systems
• REACH SVHC Declarations

Typical usage ratio

• 25-60 wt% EVA as backbone resin
• Balance with 20-50 wt% tackifier, 10-20 wt% wax, 0.1-1 wt% antioxidant
• Modulation by melt viscosity and open time requirements

Downstream process integration

• Batch or continuous melt blending in jacketed mixers
• Pre-molding into HMA sticks, pellets, or pillow blocks
• Hot application by slot, spray, or roll coaters on packaging lines

Final product types

• Case and carton sealing hot melt sticks
• Bookbinding adhesives
• HMA for disposable hygiene products

4. Wire and Cable Insulation Compounding

Cable suppliers incorporate UE2825 EVA as a primary matrix in low-voltage insulation and sheathing compounds. The material’s dielectric properties and controlled gel fraction enable efficient compounding with metal deactivators and flame retardants. Consistent pellet quality supports continuous extrusion and minimizes extrusion head build-up, boosting production uptime.

Industry compliance standards

• IEC 60502-1: Power cables with extruded insulation (up to 1 kV)
• UL 1581: Reference Standard for Electrical Wires and Cables
• RoHS Directive (2011/65/EU)
• ISO 6722: Road vehicle cable insulation requirements

Typical usage ratio

• 60-85 wt% EVA in insulation compound
• 10-25 wt% flame retardant fillers (ATH, Mg(OH)2)
• Up to 3 wt% processing aid, stabilizer, and pigment

Downstream process integration

• Direct feeding to twin-screw extrusion for wire coating
• Continuous online measurement of thickness and segregation
• Pre-crosslinking by irradiation or chemical agent where specified

Final product types

• Low-voltage wires and appliance cables
• Communication cable insulation
• Flexible automotive wire jacketing

5. Injection and Blow Molding for Toys and Consumer Products

OEMs and consumer product contract manufacturers value the flexibility and resilience of this EVA in injection-molded toys and household goods. By modifying compounding ratios with plasticizers and colorants, processors achieve precise impact strength and safety characteristics demanded by regulatory requirements, while the low odor and heavy metal-free composition ensure child-safe products.

Industry compliance standards

• EN 71-3: Safety of Toys (Migration of certain elements)
• ASTM F963: Standard Consumer Safety Specification for Toy Safety
• EU Toy Safety Directive 2009/48/EC
• ISO 8124-3: Migration of certain elements in toys

Typical usage ratio

• 55-90 wt% EVA as main resin
• 0.5-8 wt% colorant, 0.5-3 wt% plasticizer depending on target flexibility and color depth

Downstream process integration

• Pellet feed to injection or blow molding machines
• Short cycle-time molding with integrated quality checks
• Batch code registration for traceability

Final product types

• Children’s toys and teething rings
• Soft educational blocks
• Household flexible goods (brush handles, grips)

6. Film Grade Material for Packaging Applications

Converters and flexible packaging plants use this grade to produce stretch and shrink films with reliable sealability and puncture resistance. Consistent pellet morphology supports tight thickness control and optical clarity in mono- and multilayer cast or blown film processes. The material’s VA content suits anti-fog and low-temperature sealing film requirements in food and medical packaging.

Industry compliance standards

• FDA 21 CFR 177.1350: Ethylene-vinyl acetate copolymers in food contact films
• EU Commission Regulation No 10/2011 for plastics in food contact
• ISO 9001 Quality Management Systems for food packaging
• GB 4806.7-2016 (Chinese standard for food-contact plastic materials)

Typical usage ratio

• 10-40 wt% EVA as sealing layer in multilayer films
• Balance with LDPE/LLDPE for core and strength layers
• Minor amounts (0.2-0.5 wt%) slip and anti-blocking agents

Downstream process integration

• Gravity-fed extrusion for cast or blown film lines
• Co-extrusion with other polyolefins in multilayer configurations
• Corona or flame treatment before printing and sealing

Final product types

• Heat-sealable food packaging films
• Medical device packaging pouches
• Cling wrap and shrink film rolls