What is Ethylene-vinyl acetate copolymer EVA CAS 24937-78-8?

EVA is a copolymer of ethylene and vinyl acetate produced by high-pressure polymerization. Its properties range from flexible polyethylene-like resins at low VA content to softer, clearer, more polar grades at higher VA content.

How does vinyl acetate content affect EVA resin performance?

Low VA grades, often around 5-10%, are tougher and more polyethylene-like, while 18-28% VA grades are softer, more flexible, and more compatible with adhesives. Higher VA content generally improves clarity, polarity, solubility, and low-temperature flexibility.

What is the difference between EVA VA 18% and VA 28% grades?

VA 18% grades are widely used for foam products, films, and general molding, balancing softness and processability. VA 28% grades are softer and more adhesive-compatible, commonly selected for hot melt adhesives, masterbatches, wire and cable, and photovoltaic encapsulant films.

Is EVA CAS 24937-78-8 compatible with PVC, polyethylene, and polypropylene?

Yes. EVA is frequently used as a polymer modifier or blending resin because it can improve impact resistance and flexibility in PVC, PE, and PP compounds. The best grade depends on VA content and melt index.

What are the main applications of Ethylene-vinyl acetate copolymer?

Typical applications include foaming, hot melt adhesives, agricultural and packaging films, wire and cable compounds, shoe materials, masterbatches, and photovoltaic module encapsulation. Grade selection is based mainly on VA content and melt index.

Ethylene-vinyl acetate copolymer (EVA) CAS 24937-78-8

Ethylene-vinyl acetate copolymer (EVA) CAS 24937-78-8 is a flexible thermoplastic elastomer chemically defined as the copolymer of ethylene and vinyl acetate , functioning primarily as a versatile resin in hot melt adhesives, solar cell encapsulation, and foam manufacturing. Characterized by its rubber-like softness, high transparency, and stress-crack resistance, this resin bridges the gap between polyethylene and rubber. It is extensively utilized to manufacture "Solar EVA Films" for photovoltaic panels, hot melt glue sticks for packaging, and shock-absorbing midsoles in athletic footwear. We provide professional access to this material with competitive factory pricing and the ability to meet customized specifications (ranging from Low VA content for films to High VA content >28% for adhesives) for various manufacturing requirements. Our commitment to technical transparency ensures that every shipment is accompanied by comprehensive MSDS, TDS, COA documentation to support your quality assurance protocols, and we maintain capacity for consistent bulk supply to facilitate large-scale industrial operations.

CAS: 24937-78-8
Synonyms: EVA Resin, Poly(ethylene-co-vinyl acetate), Ethylene/vinyl acetate copolymer, EVA copolymer, Hot melt adhesive resin
Einecs: 429-840-1
Molecular Formula: (C2H4)x(C4H6O2)y
Grade: Foaming Grade, Hot Melt Adhesive Grade, Wire & Cable Grade, Photovoltaic (PV) Grade.
Package: 25kg PP/PE woven bag or 750kg Jumbo Bag.

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Product Description

Ethylene-vinyl acetate (EVA) is an elastic copolymer of ethylene and vinyl acetate. It is renowned for its rubber-like softness, flexibility, and excellent toughness even at low temperatures. As the Vinyl Acetate (VA) content increases, the material’s transparency, flexibility, and solubility improve, while a decrease in VA content enhances rigidity and chemical resistance.

Our EVA Resin series is produced using high-pressure bulk polymerization technology. We provide a broad spectrum of specifications, ranging from low VA content (for agricultural films and foaming) to high VA content (for hot melt adhesives and masterbatches). The product features uniform particle size, low gel content, and consistent melt flow properties.

Need a specific VA Content (e.g., 18%, 28%, 40%) or Melt Index? 📧 Email: info@industrochem.com

We supply grades equivalent to major global brands, ensuring seamless integration into your existing production processes.

1 Physicochemical Properties (Technical Data)

2 Applications

3 Quality Assurance (QA/QC)

4 Storage, Handling & Safety

Physicochemical Properties (Technical Data)

The following data represents our popular VA 18% and VA 28% Grades, which are the global standards for foaming and adhesive applications respectively.

Property	Specification (Grade 1802)	Specification (Grade 28150)
Appearance	Translucent/White Granules	Translucent/White Granules
Vinyl Acetate (VA) Content	18.0%±1.0%	28.0%±1.0%
Melt Flow Index (MFI)	2.0±0.5 g/10min	150±20 g/10min
Density	0.935 – 0.940 g/cm³	0.948 – 0.952 g/cm³
Vicat Softening Point	≈60℃	≈38℃
Hardness (Shore A)	≈88	≈70
Tensile Strength	≥12MPa	≥4MPa
Brittleness Temp	<−70∘C	<−70∘C
Solubility	Insoluble in water; Soluble in Toluene/THF	–

Applications

EVA is a foundational material for diverse industries due to its adaptability:

1. Footwear & Foaming Industries (Low VA, Low MI):

Shoe Soles: Used extensively in the production of mid-soles for sneakers and slippers due to its superior shock absorption and lightweight properties.
Foam Sheets: Used for yoga mats, sports padding, and sound insulation materials.

2. Hot Melt Adhesives (High VA, High MI):

Packaging: Acts as the base polymer for hot melt glues used in carton sealing and bookbinding.
Woodworking: Used in edge banding adhesives ensuring strong bonding strength.

3. Photovoltaic (PV) Industry (Specialty Grade):

Solar Encapsulation: High-transparency EVA film is critical for encapsulating solar cells, protecting them from moisture and physical stress while ensuring maximum light transmission.

4. Wire & Cable:

Insulation: Used in halogen-free flame retardant cables and semi-conductive shielding layers, offering flexibility and stress-cracking resistance.

Quality Assurance (QA/QC)

At Industrochem, precision determines performance. Our production lines are monitored under ISO 9001:2015 quality systems.

Structure Verification: We utilize FTIR (Fourier Transform Infrared Spectroscopy) and, where necessary, NMR (Nuclear Magnetic Resonance) to strictly verify the Vinyl Acetate (VA) ratio. Even a 1% deviation in VA content can drastically alter the material’s melting point and adhesion properties.
Rheology Control: Every batch undergoes rigorous Melt Flow Index (MFI) testing to ensure consistent viscosity during customer processing (extrusion or injection molding).
Impurity Control: Automated optical sorting removes any black spots or discolored pellets to ensure high clarity for film applications.

For the redispersible polymer form used in dry-mix construction systems, see RDP Polymer Powder.

Storage, Handling & Safety

Storage Conditions:

Temperature Sensitivity: EVA pellets, especially high-VA grades (e.g., >28%), are prone to blocking (sticking together) if stored in hot environments.
- Recommendation: Store below 25°C in a cool, dry area. Avoid direct sunlight.
Stacking: Do not stack pallets more than two high to prevent pressure-induced blocking of the bottom bags.
Shelf Life: 12-24 months if stored properly.

Safety Precautions (HSE):

Thermal Hazards: During processing (extrusion/molding), the material is molten. Wear heat-resistant gloves to prevent thermal burns.
Ventilation: Overheating (>230°C) causes decomposition, releasing acetic acid fumes which are irritating to the eyes and respiratory tract. Ensure local exhaust ventilation is operating during processing.
PPE Recommendations:
- Eyes: Safety glasses with side shields.
- Skin: Long sleeves and standard work gloves for handling cold pellets.
- Respiratory: Use organic vapor respirators if ventilation is insufficient during hot processing.

Find the perfect EVA grade for your application.

From standard foaming grades to high-flow adhesive resins, we deliver consistency.

👉 Get a Quote: info@industrochem.com

FAQ - Technical & Supply Chain

Q:
What is Ethylene-vinyl acetate copolymer EVA CAS 24937-78-8?

A: EVA is a copolymer of ethylene and vinyl acetate produced by high-pressure polymerization. Its properties range from flexible polyethylene-like resins at low VA content to softer, clearer, more polar grades at higher VA content.
Q:
How does vinyl acetate content affect EVA resin performance?

A: Low VA grades, often around 5-10%, are tougher and more polyethylene-like, while 18-28% VA grades are softer, more flexible, and more compatible with adhesives. Higher VA content generally improves clarity, polarity, solubility, and low-temperature flexibility.
Q:
What is the difference between EVA VA 18% and VA 28% grades?

A: VA 18% grades are widely used for foam products, films, and general molding, balancing softness and processability. VA 28% grades are softer and more adhesive-compatible, commonly selected for hot melt adhesives, masterbatches, wire and cable, and photovoltaic encapsulant films.
Q:
Is EVA CAS 24937-78-8 compatible with PVC, polyethylene, and polypropylene?

A: Yes. EVA is frequently used as a polymer modifier or blending resin because it can improve impact resistance and flexibility in PVC, PE, and PP compounds. The best grade depends on VA content and melt index.
Q:
What are the main applications of Ethylene-vinyl acetate copolymer?

A: Typical applications include foaming, hot melt adhesives, agricultural and packaging films, wire and cable compounds, shoe materials, masterbatches, and photovoltaic module encapsulation. Grade selection is based mainly on VA content and melt index.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

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