Applications of Sinopec Yanshan 9F2 EVA in Industrial Manufacturing

Sinopec Yanshan 9F2 EVA is a specialty-grade ethylene-vinyl acetate copolymer widely utilized in demanding industrial manufacturing. With balanced melt flow and vinyl acetate content, this resin delivers process consistency in downstream applications requiring specific flexibility, transparency, and adhesion properties. The following sectors demonstrate established, compliant use cases for this material.

1. Cable Compound Manufacturing

Leading cable insulation and jacketing producers use this EVA resin as a primary matrix in low and medium voltage power and telecommunication cables. Its consistent melt characteristics and cleanliness meet the strict quality demands for insulation compounds, ensuring stable dielectric performance and mechanical strength during continuous extrusion. Manufacturers compound it with flame retardants, antioxidants, and minerals according to cable type and certification target.

Industry compliance standards

• IEC 60502-1: Power cables with extruded insulation
• GB/T 12706.1: Standards for plastic insulated power cables
• RoHS Directive (2011/65/EU): Restriction of hazardous substances
• UL 1581: Reference standard for electrical wires, cables, and flexible cords

Typical usage ratio

• 45–65% by weight in insulation compounds; adjustment depends on target dielectric strength, flexibility, and flame resistance required by the cable type
• May be combined with LDPE or LLDPE for processing or mechanical property tuning

Downstream process integration

• Direct dry blending with masterbatches and additives before twin-screw extrusion
• Continuous or batch kneading to achieve shadow-free sheathing and insulation coatings

Final product types

• Low-voltage building wire and cable (<1 kV)
• Medium-voltage power cables (1–35 kV)
• Control and signal cable insulation
• Telecommunication cable sheathing

2. Hot Melt Adhesive (HMA) Production

Formulators of hot melt adhesives incorporate this EVA to achieve rapid set and strong tack for packaging, woodworking, bookbinding, and hygiene nonwovens. The copolymer delivers low odor, predictable melt viscosity, and flexible bonding at ambient conditions. Its vinyl acetate content allows controlled blending with resins, plasticizers, and waxes for performance in high-speed automated packaging and lamination.

Industry compliance standards

• FDA 21 CFR 175.105: Adhesives for food packaging applications
• REACH Regulation (EC) No 1907/2006: Chemical safety reporting
• GB 9685-2016: Hygienic standards for adhesives used in food contact materials
• ASTM D4498: Standard for hot melt adhesives

Typical usage ratio

• 25–40% of total formulation by weight as the backbone polymer
• Ratio adjusted depending on required open time, viscosity, and bond strength

Downstream process integration

• High-shear melt blending with tackifiers, waxes, and stabilizers in jacketed mixing vessels
• Pumped or pelletized for use in automated adhesive dispensing systems

Final product types

• Case and carton sealing adhesives
• Bookbinding glues for spine and side adhesion
• Disposable hygiene product construction adhesives
• Woodworking edge banding adhesives

3. Solar Photovoltaic (PV) Encapsulation Film Fabrication

Manufacturers of photovoltaic cell encapsulant films select this EVA grade for its transparency and crosslinking capability, allowing for efficient solar transmission and long-term weatherability. Formulation and extrusion conditions target optimal gel content and physical stability, with peroxide crosslinking introduced where UV resilience and lamination strength are critical. Global solar panel integrators rely on these films to meet module efficiency and warranty guarantees.

Industry compliance standards

• IEC 61215: Terrestrial photovoltaic module type approval
• UL 1703 / UL 61730: Safety standards for flat-plate PV modules
• TÜV Rheinland 2PfG 1162/04.2007 for film encapsulant quality
• RoHS (EU) 2015/863: Restriction of hazardous substances in electronics

Typical usage ratio

• 100% as base film layer or 80–95% with UV absorbers and crosslinking agents
• Formulation adjusted for required cure rate and gel content by module producer

Downstream process integration

• Mixing with crosslinking agents and UV stabilizers before blown or cast film extrusion
• Laminated onto PV cells and glass in vacuum lamination cycles at controlled temperatures

Final product types

• Solar PV encapsulation films
• Backsheet lamination films
• Protective frontsheets for solar modules
• Flexible solar cell encapsulants

4. Foam and Shoe Midsole Compounding

Producers of injection or compression molded EVA foams for footwear midsoles, sport insoles, and functional foam blocks choose this resin for its compatibility with blowing agents and rubber modifiers. The controlled vinyl acetate level supports fine cell structure and high resilience. Adjustment of blowing agent and crosslinking chemistry allows fine-tuning of density, elasticity, and compression set in finished foamed products.

Industry compliance standards

• EN ISO 20345: Personal protective equipment—safety footwear
• GB 28287-2012: Technical requirements for EVA foam shoes
• REACH (EC) No 1907/2006 Annex XVII: Restricted substances
• California Proposition 65: Safe drinking water and toxic enforcement standards

Typical usage ratio

• 60–90% of compound’s polymer fraction; lower ratios when blended with NR or SBR
• Foaming additives at 5–15% based on density target

Downstream process integration

• Batch mixing with foaming agents, colorants, and crosslinkers
• Direct feed to compression or injection molding systems for shape definition

Final product types

• Shoe midsoles and insoles
• Sports and safety footwear
• Shock-absorbing foam pads
• Yoga and sports mats

5. Flexible Packaging Film Production

Film converters use this EVA copolymer to modify PE-based packaging films, yielding improved sealability, impact strength, and clarity for food contact and industrial wrappers. Melt blending provides low-temperature heat seal performance without post-processing distortion. Specific food packaging regulations guide migration limits and heavy metal content for global distribution.

Industry compliance standards

• EU Regulation No 10/2011: Plastics for food contact
• FDA 21 CFR 177.1350: Ethylene-vinyl acetate copolymer usage in packaging
• ISO 22000: Food safety management systems
• GB 9685-2016: Food contact materials—additive standards

Typical usage ratio

• 10–28% blended with LDPE or LLDPE for co-extruded films
• Higher dosage increases flexibility, transparency, and seal strength

Downstream process integration

• Pellet blending and melt extrusion—cast or blown film lines
• Co-extrusion with PE, barrier resins, and tie layers for multi-layer packaging

Final product types

• Food-grade pouch film
• Lamination base films
• Heat seal layers for snacks and dairy packaging
• Frozen food wrap and industrial liners

6. Wire & Cable Sheath Flame Retardant Compounds

Wire and cable compounders apply this resin in halogen-free flame retardant (HFFR) cable sheaths to combine processability, flexibility, and fire safety. Blended with ATH or magnesium hydroxide and special crosslinkers, the copolymer delivers char formation required in building and transportation applications. The balance between mechanical integrity and flame retardancy is tuned per application regulations and environmental safety certifications.

Industry compliance standards

• EN 50575: Power, control, and communication cables—reaction to fire
• IEC 60332-1/IEC 60332-3: Flame propagation standards
• GB/T 19666-2019: General requirements for flame retardant cables
• CPR (Construction Products Regulation) EU No 305/2011

Typical usage ratio

• 30–50% of cable sheath formulation by weight
• Flame retardant fillers added at 50–60% to meet oxygen index and drip-resistance targets

Downstream process integration

• Twin-screw compounding with mineral fillers, lubricant, and stabilizer systems
• Continuous extrusion onto strand or cable cores for final sheath

Final product types

• Halogen-free flame retardant cable sheaths
• Fire-resistant communication cables
• Control cable insulation for public infrastructure
• Subway wiring and shipboard power cables