Applications of Sinopec Yanshan Y2022 EVA in Industrial Manufacturing

Sinopec Yanshan Y2022 EVA is a widely adopted copolymer in industrial sectors demanding specific mechanical flexibility, transparency, and processing stability. Its balanced vinyl acetate content positions it as a core material in various value chains, supporting the creation of reliable, regulatory-compliant finished products. Below we outline key downstream application scenarios based on factual production practice, providing targeted information for formulation, processing, regulatory compliance, and finished good output.

1. Primary Encapsulant for Photovoltaic Modules

Y2022 EVA serves as a critical encapsulation layer in solar panel production, offering consistent melt flow and cross-linking characteristics that ensure effective lamination of photovoltaic cells. Its purity and reactivity profile help manufacturers achieve stringent weathering and yellowing resistance during module assembly. The material integrates at the lamination stage, supporting both automated and batch production lines for crystalline silicon modules.

Industry compliance standards

• IEC 61215 (Crystalline silicon terrestrial photovoltaic modules – Design qualification and type approval)
• IEC 61730 (Photovoltaic module safety qualification)
• UL 1703 (Standard for Flat-Plate Photovoltaic Modules and Panels)
• ISO 9001 (Quality management systems for manufacturing)

Typical usage ratio

• 70–80% of encapsulant composite film; often modified with 3–8% cross-linking agents and 0.1–0.5% UV stabilizers
• Blend ratio adjusted to module thickness and lamination curing requirements

Downstream process integration

• Feeds directly into film extrusion or cast sheet processing for direct lamination onto photovoltaic cells
• Cross-linking in-situ during lamination at 140–160°C under vacuum and pressure

Final product types

• Crystalline silicon solar panels
• Thin-film photovoltaic modules
• Bifacial solar modules with transparent back-sheets
• Building-integrated photovoltaic glass-laminate panels

2. Hot-Melt Adhesive Base Resin

This grade finds significant use as a core polymer in hot-melt adhesive (HMA) manufacturing, valued for its consistent melt index and flexibility in high-speed automated applications. Its balance of flexibility and adhesion strength supports assembly operations in packaging, bookbinding, woodworking, and hygiene industries, where process reliability and clear regulatory definition guide formulation.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for food packaging use)
• REACH Regulation (EC) No 1907/2006
• ISO 14021 (Self-declared environmental claims for material content)
• SQI (Supplier Quality Inspection requirements by global FMCG clients)

Typical usage ratio

• 25–60% of the hot-melt adhesive formulation, adjusted depending on required tack and strength
• Higher content (up to 65%) for pressure-sensitive adhesives, lower (as low as 20%) when blended with waxes or resins

Downstream process integration

• Compounded with tackifiers, waxes, and stabilizers in hot-melt reactors at 130–160°C
• Forms the matrix resin, entering as pellets or granules for in-line blending and direct extrusion into glue sticks, granules, or films

Final product types

• Hot-melt glue sticks for packaging
• Hygiene adhesive tapes and fasteners (diapers, sanitary products)
• Bookbinding adhesives
• Woodworking and paper lamination adhesives

3. Foam Shoe Soling and Footwear Compounds

Producers in the footwear sector utilize this grade as a matrix polymer for lightweight and flexible foam soling. Its proprietary melt behavior supports controlled expansion and closed-cell foam morphology, enabling precise tailoring of hardness, density, and spring-back. The resin’s compliance with footwear-grade safety and regulatory standards underpins its selection by global sports and leisure shoe brands.

Industry compliance standards

• EN ISO 20345/20347 (Safety and occupational footwear requirements)
• GB 20400 (Limits for hazardous substances in leather and footwear)
• OEKO-TEX Standard 100 (Textile and leather products safety)
• REACH Annex XVII (Restriction of chemicals in finished consumer products)

Typical usage ratio

• 60–85% of foam compound by total weight, adjusted with blowing agents (azodicarbonamide, baking soda), fillers, and colorants
• High-ratio use for maximum weight reduction with tensile retention

Downstream process integration

• Premixed with blowing agents and curatives in closed mixers, then direct-injected or compression-molded at 150–170°C
• Supports both continuous and batch block foam production for sheet or direct shoe mold shaping

Final product types

• Midsole and outsole sheets for athletic footwear
• Luxury slipper base units
• Children’s foam shoes
• Industrial anti-slip soles and insoles

4. Cable Grade Insulation and Sheathing Compound

Wire and cable manufacturers compound this material into insulation and jacketing for low- and medium-voltage applications, benefiting from its dielectric strength, low-temperature flexibility, and high process consistency. Integration focuses on compliance with regional electrical and material safety codes, requiring careful control of additive ratios and melt stability during extrusion.

Industry compliance standards

• IEC 60502-1 (Power cables with extruded insulation)
• RoHS Directive 2011/65/EU (Restriction of hazardous substances in electrical equipment)
• UL 1581 (Reference standard for electrical wires, cables, and flexible cords)
• China GB/T 12706.1 (Power cables with extruded insulation and their accessories)

Typical usage ratio

• Base resin makes up 45–75% of total insulation/sheathing compound, balanced with flame retardants, plasticizers, and stabilizers
• Ratio adjusted for wall thickness requirements and flame-retardancy targets

Downstream process integration

• Compounded in twin-screw extruders, then pelletized or directly extruded onto copper/aluminum wires
• Inline cross-linking or curing (for cross-linked insulation types) via irradiation or peroxide process

Final product types

• Low-voltage power cables
• Flexible instrument and control cables
• Automotive and appliance wiring sheathing
• Communication cable insulation

5. Film and Sheet for Food Packaging Applications

In food contact packaging, converters employ this grade in co-extruded multilayer films or as a blend with LDPE for improved flexibility and sealing characteristics. Its food-safe formulation and reliable melt uniformity enable compliance with migration and purity specifications set by food safety authorities, targeting shelf-stable and refrigerated unpackaged food wrap markets.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymers for food contact)
• EU No 10/2011 (Plastic materials in contact with food)
• GB 4806.7-2016 (Chinese standard for food contact plastics)
• BRCGS Packaging Materials Global Standard (hygiene and QC in food packaging)

Typical usage ratio

• 15–45% in mono- or co-extruded flexible films, dependent on sealing requirements and blend with LDPE/LLDPE
• Higher ratios in peelable-lid seals, lower in cling wraps

Downstream process integration

• Direct-fed into blown film or cast film extruders, with multilayer die heads for sandwich/bulk layers
• Post-extrusion inline corona/discharge treatment for sealability or print enhancement

Final product types

• Lidding films for ready-meal trays
• Vacuum packaging pouches
• Flexible food wraps and bag liners
• Resealable packaging for perishable foods