Applications of Sinopec Yanshan 14J4 EVA in Industrial Manufacturing

Sinopec Yanshan 14J4 EVA serves as a core raw material in several precision industrial sectors. Its consistent quality and controlled vinyl acetate content support strict downstream process requirements. The following sections detail distinct real-world manufacturing applications, process integration stages, regulatory systems, and end-use products.

1. Photovoltaic Encapsulation Film Manufacturing

Manufacturers adopt this grade for solar encapsulant film production, where high transparency and uniformity are required. The copolymer supports silane cross-linking and achieves low gel content—a necessity for optical clarity and durability in PV module lamination. This grade’s physical consistency ensures strong adhesion to solar cells, stable curing performance, and reliable module lifespan in both mono and polycrystalline panels.

Industry compliance standards

• IEC 61215 (Crystalline Silicon Terrestrial PV Modules - Design Qualification)
• UL 1703 (Standard for Flat-Plate Photovoltaic Modules and Panels)
• RoHS Directive (2011/65/EU)
• REACH Regulation (EC) No 1907/2006

Typical usage ratio

• 62–70 wt% of film formulation, tuning co-monomer addition for flexibility or adhesion as needed

Downstream process integration

• Direct granulate feeding into twin-screw film extrusion lines prior to silane cross-linking
• Addition of UV stabilizers and crosslinkers during compounding for customized sheet properties
• Continuous sheet casting and curing steps under lamination pressure
• Post-production film slitting and surface cleaning as per module assembly requirements

Final product types

• Solar encapsulation films for PV modules
• Backsheet adhesive layers
• Junction box gaskets
• Flexible solar panel covers

2. Hot Melt Adhesive (HMA) Production

This EVA material is widely implemented as a base polymer in industrial hot melt adhesives. It provides balanced melt flow and controlled tack, allowing formulators to produce adhesives that bond packaging, wood, hygiene nonwovens, and bookbinding substrates. Processors rely on its stable viscosity and compatibility with common wax and resin modifiers, delivering consistent glue performance at elevated production speeds.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for Food Packaging)
• EN 923 (Adhesives: Terminology)
• ISO 9001:2015 (Quality Management in Adhesive Manufacturing)
• GMP Regulation (EU) No 2023/2006

Typical usage ratio

• 25–45% by weight in hot melt adhesive formulations, varying with tackifier and plasticizer selection for application strength and open time adjustment

Downstream process integration

• Feeding into adhesive melt kettles or continuous compounding extruders
• Blending with hydrocarbon resins, waxes, and plasticizers for performance tuning
• Molten application to film, carton, or nonwoven substrates in spray or slot die systems
• Cooling and cutting into adhesive chips for bulk supply

Final product types

• Hot melt glue sticks and pellets
• Packaging adhesives for corrugated board
• Bookbinding spine adhesives
• Disposable diaper and hygiene product assembly adhesives

3. Cable and Wire Insulation Compounds

Cable compound producers use this EVA to engineer low-smoke, halogen-free insulation and sheathing layers for power and communication wires. Its balanced density and clean thermal profile enable precise compounding with inorganic flame retardants, yielding flexible, durable coatings that meet electrical, mechanical, and fire safety requirements in construction and automotive harnessing.

Industry compliance standards

• IEC 60228 (Conductors for Insulated Cables)
• UL 1581 (Reference Standard for Electrical Wires, Cables, and Flexible Cords)
• EN 50363-5 (Insulating and Sheathing Compounds for Cables – Halogen-Free Polymeric Compounds)
• RoHS Directive Annex II (Hazardous Substances Restriction)

Typical usage ratio

• 18–25% by weight in insulation compounds, tailored according to flame retardant and plasticizer loading for dielectric performance and flexibility targets

Downstream process integration

• Melt blending in intensive mixers with magnesium/calcium fillers and stabilizers
• Extrusion through cable insulation dies
• Online quality control for wall thickness and dielectric breakdown voltage
• Granule pelletizing for cable manufacturer supply

Final product types

• Low voltage cable insulation
• Halogen-free flame-retardant sheaths
• Building wire jacketing
• Fiber optic buffer layer compounds

4. Injection Molded Shoe Sole Foams

Shoe and sportswear manufacturers select this material as the principal foam base for lightweight, cushioning sole applications. The defined melt index and flexibility allow for consistent cell structure development during injection foaming. Manufacturers combine this material with ethylene co-polymers and blowing agents to achieve shock absorption, wear resistance, and color stability in mass footwear production.

Industry compliance standards

• GB/T 15107-2013 (EVA Foam Sheet Standard - China)
• ASTM D3575 (Standard Test Methods for Flexible Cellular Materials Made From Olefin Polymers)
• EN ISO 20344 (Footwear Test Methods – General Requirements)
• ISO 9001:2015 (Quality Control for Footwear Components)

Typical usage ratio

• 55–75% of total foam mass, with output modified for cell size, hardness, and density by adjusting crosslinker levels and foaming agent content

Downstream process integration

• Dry blending with other polymer granulates, pigments, crosslinkers, and blowing agents
• Direct feeding to injection molding machines equipped for foam cell control
• In-mold expansion at controlled temperature and pressure for target density
• Post-mold demolding, trimming, and surface finishing

Final product types

• Sports shoe midsoles
• Slipper and sandal soles
• Industrial safety footwear core
• Children’s foam sandal components