Applications of Braskem Evateno 3523PE EVA in Industrial Manufacturing

Braskem Evateno 3523PE EVA is an ethylene-vinyl acetate copolymer used as a specialty raw material in industrial sectors for its unique balance of flexibility, clarity, low-temperature performance, and processability. As a direct manufacturer, we supply this grade extensively to high-value applications that leverage its specific chemistry to meet demanding product, regulatory, and process requirements. Below we detail main application scenarios, including the regulatory context, formulation guidelines, integration pathways, and representative finished goods produced by downstream partners.

1. Photovoltaic Encapsulant Film Production

EVA copolymers serve a critical function in the photovoltaic industry, particularly in the production of encapsulant films for solar module lamination. The 3523PE grade’s transparency and crosslinking capability under lamination conditions ensure reliable long-term protection of photovoltaic cells. Downstream converters compound the resin with crosslinking and UV stabilizer additives, then process it into sheets used between the glass and photovoltaic cells.

Industry compliance standards

• IEC 61215 (Photovoltaic Module Qualification)
• IEC 61730 (PV Module Safety)
• UL 1703 (Standard for Flat-Plate Photovoltaic Modules and Panels)
• RoHS Directive 2011/65/EU compliance
• REACH Regulation (EC) No 1907/2006

Typical usage ratio

• Used as the primary resin at 65-85% of total film formulation, with the remainder consisting of curing agent and UV/thermal stabilizer additives. Film thickness, crosslink degree, and module design determine adjustment.

Downstream process integration

• The resin is first melt compounded with additives, then cast or calendared into sheets. Sheets undergo lamination with PV cells and glass in a vacuum laminator at 140-160°C for crosslinking and bonding.

Final product types

• Photovoltaic encapsulant films
• Solar module assemblies for residential, commercial, and utility-scale installations
• Bifacial and flexible PV panel constructions

2. Hot Melt Adhesive (HMA) Base for Packaging and Bookbinding

Converters in the adhesives sector rely on EVA copolymers as a main component of hot-melt adhesives, primarily for automated packaging and industrial bookbinding. The balance of flexibility and adhesion enables strong bonding to paper, cardboard, and various plastics. The 3523PE grade melts at workable temperatures compatible with high-speed glue applicators and offers clean-running properties on industrial lines.

Industry compliance standards

• FDA 21 CFR 175.105 (Indirect Food Additives: Adhesives and Components of Coatings, USA)
• EU Regulation No 10/2011 on plastic materials and articles intended to come into contact with food
• REACH Regulation (EC) No 1907/2006
• Good Manufacturing Practice (GMP) for adhesives used in food packaging

Typical usage ratio

• Usually 40-60% by weight of total HMA formulation, depending on required open time, viscosity, and substrate. Elastomer and tackifier percentages are modified to achieve the needed melt properties and bond strength.

Downstream process integration

• Pelletized EVA is compounded with tackifiers, waxes, and plasticizers in a hot-melt mixer, then extruded and pelletized or directly filled into blocks or pillows. Adhesive is melted in a heated tank and dispensed via extrusion heads or rollers onto packaging substrates or book spines.

Final product types

• Hot-melt glue sticks and pellets for consumer and industrial settings
• Case and carton sealing adhesives
• Bookbinding adhesives for softcover books and notepads

3. Wire and Cable Insulation & Sheathing Compounds

EVA grades such as 3523PE are a standard choice for low-voltage cable insulation and outer sheathing, valued for their dielectric performance and cold flexibility. The resin blends compatibly with flame retardants and plasticizers during compounding, facilitating compliance with global electrical safety norms. The polymer enters the process via extrusion and can be heat-crosslinked if specified.

Industry compliance standards

• UL 1581 (Reference Standard for Electrical Wires, Cables, and Flexible Cords)
• IEC 60502-1 (Power Cables with Extruded Insulation and Their Accessories for Rated Voltages)
• RoHS Directive 2011/65/EU
• EN 50363-1 (Insulating Compounds for Cables, Part 1 EVA Compounds)

Typical usage ratio

• Formulations typically include 30-70% EVA by weight, the remainder being flame retardant fillers (ATH/Mg(OH)2), plasticizers, and processing aids. EVA ratio adjusts according to required cable flexibility and insulation thickness.

Downstream process integration

• Dry blending with mineral fillers and plasticizers precedes melt compounding in twin-screw extruders. Compound is pelletized, then fed into cable extrusion lines, where it forms the insulation or sheath. If crosslinking is required, downstream processing may involve silane grafting or irradiation.

Final product types

• Low voltage power and control cables
• Flexible appliance cords
• Halogen-free flame-retardant cables (LSZH)

4. Footwear Foam and Injection Molding

The polymer’s softness and moldability support specialized footwear foam formulations, notably for midsoles, in-sock layers, and comfort inserts. Industrial foamers adjust the vinyl acetate content to tune softness, resilience, and density for finished parts that must withstand millions of flex cycles. EVA foam delivers shock absorption and weather resistance, with the 3523PE grade performing well in direct injection molding and crosslinked foam extrusion.

Industry compliance standards

• ISO 20344 (Personal Protective Equipment - Test Methods for Footwear)
• REACH Regulation (EC) No 1907/2006
• US CPSIA (Consumer Product Safety Improvement Act, for children’s shoes)
• GB/T 15107 (China National Standard for Sports Footwear)

Typical usage ratio

• Foam formulations often contain 50-75% EVA, balanced by blowing agents, crosslinkers, and performance additives. Lower ratios suit harder outsoles; higher ratios are used for soft, shock-absorbing midsoles and insocks.

Downstream process integration

• Compounding in a Banbury mixer precedes sheet extrusion or direct injection. Crosslinked foams require a further heating step, activating the chemical blowing agent and crosslinker. Molding shapes the finished components for later assembly into shoes.

Final product types

• Sport and running shoe midsoles
• Insole layers for fashion and work footwear
• Lightweight foam slippers and sandals

5. Flexible Film Manufacturing for Packaging Applications

The copolymer’s clarity, sealability, and puncture resistance make it a valuable modifier in multilayer flexible films for packaging perishable goods or consumer products. Co-extrusion or blending with LDPE increases the film’s softness and sealing strength without compromising process throughput. Material producers adjust ratios to optimize machinability or transparency standards required by brand owners.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymers for food-contact films)
• EU Commission Regulation No 10/2011
• ISO 22000 Food Safety Management System (for packaging manufacturers serving food sector)
• GMP EC 2023/2006

Typical usage ratio

• EVA is typically blended at 5-20% by weight in LDPE/LLDPE films; dose can reach up to 40% in applications requiring higher sealing strength and flexibility. Actual ratio reflects sealing speed, optical requirements, and tear resistance targets.

Downstream process integration

• Pellet blending occurs before feeding the resin mixture into blown film or cast film extrusion lines. EVA enters as a modifier in one or multiple layers during co-extrusion. Secondary treatments (corona, anti-fog) are applied post-extrusion depending on end-use.

Final product types

• Food packaging shrink films
• Frozen food and vacuum pouches
• Stretch hood and overwrap films for beverage and logistics sectors