Applications of Sinopec Yanshan 14J6 EVA in Industrial Manufacturing

Sinopec Yanshan 14J6 EVA (Ethylene Vinyl Acetate Copolymer) supports a range of specialized industrial manufacturing processes, serving as an essential polymer material in several niche applications. Our formulation, process know-how, and quality control ensure consistent performance for each downstream sector.

1. Solar Photovoltaic Encapsulant Sheets

This grade is widely adopted in the production of encapsulant sheets for photovoltaic modules. Processors blend the material with crosslinking agents and stabilizers, followed by extrusion and flat die calendaring to manufacture robust films. The encapsulant sheets provide durable protection to solar cells, enhancing light transmission and improving cell longevity. Manufacturers must carefully manage vinyl acetate content and crosslinking degree to secure reliable lamination and field durability, especially under outdoor exposure and thermal cycling.

Industry compliance standards

• IEC 61215 for crystalline silicon terrestrial photovoltaic modules
• UL 1703 / UL 61730 module safety requirements
• RoHS Directive (2011/65/EU) compliance for module bill of materials
• REACH Regulation (EC) No 1907/2006 substances threshold

Typical usage ratio

• Sole encapsulant resin at 65–75 wt% of total sheet formulation
• Crosslinker blends at 1–3 wt%
• Antioxidants and UV stabilizers at 0.2–1 wt% as required
• Ratio modifies based on desired crosslink density and sheet thickness

Downstream process integration

• Compounds are dry blended, then direct-extruded into films (0.3–0.6 mm)
• Sheet calendaring and in-line lamination with solar cells and glass
• Thermal crosslinking during vacuum lamination step (140°C–150°C, 10–15 min)
• Films trimmed and slit to module size specification

Final product types

• Photovoltaic module encapsulant sheets (clear or white EVA sheets)
• Bifacial solar module encapsulant sheets
• Flexible and rigid solar laminate interlayer films
• Double-glass PV module layered sheets

2. Hot Melt Adhesives (HMA) for Packaging and Bookbinding

Industrial adhesive formulators use this resin as a primary polymer backbone for hot-melt systems in fast-setting packaging line, bookbinding, and label applications. The material imparts balanced adhesion, flexibility, and suitable open time. Formulators blend it with waxes, tackifiers, and plasticizers to fine-tune melting point, viscosity, and bonding performance, strictly managing ingredient purity to meet regulatory needs in consumer and food packaging workflows.

Industry compliance standards

• FDA 21 CFR 175.105 (adhesives for indirect food contact in the USA)
• ISO 22000 food safety management system where adhesives contact secondary packaging
• EN 923 adhesive terminology, test methods, and GMP documentation (Europe)
• BRCGS Global Standard for Packaging Materials (when adhesives are used within certified facilities)

Typical usage ratio

• Polymer base typically 25–40 wt% of hot melt adhesive formulation
• PET tackifier resins at 35–55 wt%
• Paraffin wax or Fischer-Tropsch wax up to 20 wt% depending on softening requirements
• Plasticizer content (mineral oil) up to 10 wt% for flexibility addition

Downstream process integration

• In-line batch melt blending with tackifiers and waxes
• Hot-melt extrusion, pelletization, and block casting
• Granules and blocks loaded into automated glue tanks in packaging lines
• Direct application via nozzles, rollers, or blade coaters at 150–180°C

Final product types

• Case and carton sealing hot melt adhesives
• Backbone adhesive for perfect-bound books
• Wrap-around label adhesives for consumer products
• Paper-to-board lamination adhesives

3. Foam Injection Molding for Footwear Midsoles

Shoe components manufacturers select this copolymer for EVA foam production where comfort, cushioning and durability are critical. Processors incorporate blowing agents, crosslinkers, and pigments to create closed-cell foam structures. The mechanical and rebound performance depend on accurate vinyl acetate ratio, cell size consistency, and precise process control during injection molding, with close attention to biocompatibility and restricted substance compliance for direct skin contact items.

Industry compliance standards

• GB/T 15107-2013 (China, EVA foamed shoes)
• EU REACH Regulation (SVHC restriction for phthalates, lead, etc.)
• Oeko-Tex Standard 100 (Class I/II, children’s footwear)
• ISO 20345 safety footwear (when foamed midsole used in safety shoes)

Typical usage ratio

• Base polymer at 65–85 wt% of total foam compound
• Blowing agents (e.g., azodicarbonamide) at 1–2 wt%
• Crosslinking agents (DCP, peroxides) at 1–3 wt%
• Fillers and pigments at 10–25 wt% customizable by target density

Downstream process integration

• Banbury or twin-screw compounding of all ingredients
• Pellet extrusion, cooling, and feeding to injection or compression mold lines
• Molding at 170–190°C under set pressure, foaming and vulcanization achieved in-mold
• Cooled parts demolded, cut, and finished for downstream assembly

Final product types

• Running and athletic shoe midsoles
• Slipper soles and sport sandal bases
• Work shoe cushioning layers
• Children’s footwear foam components

4. Wire & Cable Sheathing Compounds

Large-scale cable insulation and jacketing plants use this material as a core component in thermoplastic and crosslinked cable compounds. Processors blend it with flame retardants, plasticizers, and colorants to produce insulation sleeves with superior flexibility, dielectric strength, and weatherability. The strict formulation control, free from halogenated additives, helps meet stringent fire safety and environmental regulations, while assuring long-term performance in both indoor and outdoor electrical applications.

Industry compliance standards

• UL 1581 (Electrical wires, cables, and flexible cords)
• IEC 60502 (Power cables with extruded insulation)
• RoHS Directive (lead, cadmium, phthalates restrictions in cable material)
• EN 50363-3 (Insulating compounds based on EVA type A)

Typical usage ratio

• Base polymer 55–75 wt% in cable compound
• Flame retardants (ATH, Mg(OH)₂) up to 35 wt% depending on required fire behavior
• Plasticizers up to 10 wt% for increased flexibility
• Color masterbatch at 2–5 wt% per end-use marking requirement

Downstream process integration

• All ingredients compounded through twin-screw extruders
• Granules fed to wire-coating extrusion lines at 125–160°C
• Direct extrusion over copper or aluminum wires for insulation/jacketing
• Optional continuous crosslinking (silane or irradiation) for enhanced thermal properties

Final product types

• Flexible electrical wire insulation
• Power and signal transmission cable jackets
• Low-smoke, halogen-free cables for infrastructure and transport
• Automotive and appliance wiring sleeves

5. Film Blowing for Greenhouse and Agricultural Films

Agricultural film converters use this copolymer to produce specialty films for greenhouses, mulching, and silage wrap. The material acts as a modifier to improve film flexibility, cold resistance, and optical clarity when blended with LDPE and LLDPE. Processors carefully control blend ratios, extrusion temperature, and film draw ratios to achieve low haze, correct mechanical strength, and UV durability on real-world farms, all while observing regulatory bans on specific additives for food-contact and environmental safety.

Industry compliance standards

• EN 13206 (Plastic films for agricultural use, mechanical and optical properties)
• ISO 18602 (Packaging and environment sustainability requirements)
• REACH Regulation for substance registration and reporting on additives
• GB 4455-2006 (China, plastic films for agricultural mulching)

Typical usage ratio

• Modifier at 5–20 wt% in LDPE/LLDPE blends for blown film formulation
• UV stabilizer additives at 0.5–1.5 wt%
• Anti-block and slip agents at 0.3–0.8 wt%
• Ratio adjusted for flexibility, cold resistance, and film gauge

Downstream process integration

• All-polymer and additive premixing, feeding into film blowing extruders
• Blown film extrusion through annular die, cooling and bubble stabilization
• Surface treatment (corona, flame) prior to slitting and winding
• Quality checking for tear resistance, optical clarity and weld strength

Final product types

• Greenhouse covering films
• Mulch films for vegetable and crop farming
• Silage and bale wrap films
• Horticultural bags and protective covers