Applications of Sinopec Yanshan 18J6 EVA in Industrial Manufacturing

Sinopec Yanshan 18J6 EVA meets demanding industrial application requirements through its specific chemical and physical profile. With consistent melt flow and vinyl acetate content, it serves as a crucial polymeric raw material for multiple manufacturing sectors. Below we detail its significance and role in distinct downstream application scenarios, referencing safety, processing, and product requirements based on established industrial standards.

1. Hot Melt Adhesives for Packaging and Bookbinding

This grade supports key adhesive manufacturers in the packaging and bookbinding sector due to its balanced adhesion properties and heat response. Process engineers select this material during adhesive compounding for carton sealing, spine gluing, and laminating, ensuring consistent bond strength, flexibility, and resistance to thermal cycling during logistics and end-use.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for food packaging in the US)
• REACH Regulation (EC) No 1907/2006 (European chemical safety)
• ISO 9001:2015 (Quality management for adhesive production)
• GB/T 27728-2011 (Chinese standard for hot melt adhesive)

Typical usage ratio

• 30–50% by weight in hot melt adhesive formulations, adjusted depending on required tack and open time; plasticizers or resins modulate the EVA content based on carton or book substrate.

Downstream process integration

• Direct melt blending in internal mixers or extruders during adhesive base formulation.
• Granule introduction synchronized with resin and wax dosing before compounding.
• Inline QC checks verify homogeneity pre-filtration and packaging.

Final product types

• Case and carton sealing hot melt adhesives
• Book spine adhesives for perfect binding
• Laminating adhesives for paperboard packaging
• Pressure-sensitive hot melt adhesives (PSA sticks)

2. Solar Panel Encapsulation Film Manufacturing

Downstream processors use 18J6 EVA as a critical material in the production of solar cell encapsulation films thanks to its proven cross-linking ability, transparency, and weather resistance. The polymer is melt-extruded and then cross-linked during lamination, forming a durable, adhesive barrier between delicate solar cells and the outer glass layer, withstanding prolonged UV, heat, and moisture exposure in demanding outdoor environments.

Industry compliance standards

• IEC 61215 (Photovoltaic module qualification)
• UL 1703 (Safety standard for flat-plate PV modules)
• RoHS 2011/65/EU (Restriction of hazardous substances)
• EN 50618 (Cable and module safety for PV systems)

Typical usage ratio

• 95–99% EVA content in extruded encapsulant film formulations, with minor additives such as cross-linking agents and UV stabilizers; adjusted to meet cross-linking index and optical clarity specs.

Downstream process integration

• Pellets introduced to twin-screw extruders during film manufacturing.
• Film casting and calendaring, followed by thermal cross-linking during module lamination.
• QC includes gel content measurement and light transmission testing post-lamination.

Final product types

• Encapsulation films for crystalline silicon solar panels
• Photovoltaic module intermediate layers
• Flexible solar panel sheeting
• UV-resistant encapsulant sheets

3. Wire and Cable Insulation Compounds

Cable manufacturing plants utilize this material as a primary polymeric base for low-voltage insulation compounds in flexible power cords, harnesses, and data cables. The combination of flexibility, electrical resistance, and environmental durability makes the EVA grade suitable for compounding with flame retardants and plasticizers, supporting continuous extrusion over copper or aluminum conductors for electrical safety and long-term service.

Industry compliance standards

• UL 62 (Flexible cords and cables in North America)
• IEC 60228 (Conductors for insulated cables)
• EN 50363-1 (Insulating materials for cables)
• RoHS 2011/65/EU (Toxic substance restrictions in electrical equipment)

Typical usage ratio

• 40–70% EVA in cable compound formulations; the proportion varies with required flexibility, mechanical strength, and flammability rating, typically higher for soft, flexible wires and lower for more rigid insulation.

Downstream process integration

• EVA granules dry-mixed with fillers and additives, then melt-compounded in screw extruders.
• Molten compound extruded over wire conductors at controlled temperature; cooling calibration follows.
• Property testing includes tensile strength and dielectric resistance before final spool-up.

Final product types

• Low-voltage wire and cable insulation
• Power tool cords and appliance wire jackets
• Automotive cable sheaths
• LAN and communication cable insulation layers

4. Footwear and Sports Equipment Foam

This EVA grade forms the base resin for expanded foam blocks and injection-molded parts in footwear midsoles and protective sports padding. Manufacturers value its shock-absorbing properties, compression set resistance, and ease of expansion with blowing agents. The resin’s melt characteristics facilitate uniform foaming and precise density adjustment for various athletic shoe models and sports impact protectors.

Industry compliance standards

• EN 13634 (Safety requirements for footwear)
• ASTM F2913 (Footwear mechanical testing)
• GB/T 15115-2013 (Chinese standard for EVA foamed plastics)
• ISO 20344 (Footwear test methods)

Typical usage ratio

• 60–95% by weight in footwear foam compounds; specific percentage depends on required hardness, elasticity, and final cell structure for midsoles or padding applications.

Downstream process integration

• Melt compounding with blowing agents and nucleating agents prior to injection or compression molding.
• Foam expansion and curing in multi-cavity presses or continuous molding lines.
• On-line density and resilience testing for QA prior to integration into shoes or sports gear.

Final product types

• Sports shoe midsoles and insoles
• Protective padding for helmets and guards
• Yoga and gym mats
• Specialty shock-absorbing soles for safety footwear

5. Film Grade Compounds for Flexible Packaging

Flexible packaging converters integrate this resin into co-extruded multilayer films for food contact, medical pouches, and industrial sacks. The polymer’s clarity, puncture resistance, and sealability allow converters to meet stringent migration and mechanical property demands. It supports high-speed blown film and cast film lines, allowing repeatable output with precise thickness and property control for specialty barrier or sealing layers.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymers for food contact films)
• EU 10/2011 (Regulation on plastic materials and articles for food contact)
• GB 4806.7-2016 (Chinese regulations for food contact plastics)
• ISO 22000 (Food safety management for packaging production)

Typical usage ratio

• 3–20% in multilayer film structures, primarily in the sealant layer; the content increases for deep freeze or peel-seal applications and decreases for core structural support films.

Downstream process integration

• Pellets meter into blown film or cast film extruders with LLDPE/LDPE and other functional resins.
• Melt blending inline, followed by immediate layer sequencing and cooling in chill rolls or air rings.
• Migratory and physical tests validate safety and performance for food or pharma use before slitting and final conversion.

Final product types

• Heat-sealable bags and pouches for food and pharmaceuticals
• Frozen food packaging films
• Medical device overwrap and sterile pouches
• Industrial film-based liners with enhanced flexibility

6. Injection Molding of Toys and Consumer Goods

Downstream toy and commodity manufacturers choose this grade for safe and flexible molded goods. The polymer supports vibrant colorant dispersion, good surface finish, and resistance to tearing and environmental stress-cracking, suitable for children’s products and household accessories. Its compliance with food and toy safety lists makes it dependable for products with direct skin or mouth contact.

Industry compliance standards

• EN 71-3 (European safety standard for toys regarding chemical composition)
• ASTM F963 (US toy safety standards)
• GB 6675 (Chinese national toy safety requirements)
• US CPSIA (Consumer Product Safety Improvement Act compliance for children’s products)

Typical usage ratio

• 80–100% EVA base, with pigment and performance additives accounting for balance; ratios depend on target flexibility and shatter resistance, typically higher for soft-touch toys and lower for rigid household items.

Downstream process integration

• Material pre-blending with color masterbatches and anti-block agents prior to hopper feeding.
• Injection into multi-cavity molds at controlled pressure and residence time for dimensional accuracy.
• In-line monitoring of organoleptic and mechanical properties to meet end-user safety and quality targets.

Final product types

• Soft and squeezable toys for infants and toddlers
• Safe teething rings and children’s play balls
• Flexible household containers and organizers
• Novelty and recreational molded goods