How does Vinyl Acetate (VA) content affect the performance of EVA resin?

The VA content is the most critical specification. Low VA content (5-10%) behaves like flexible Low-Density Polyethylene (LDPE), offering toughness and transparency for films. As VA content increases (18-28%), the material becomes softer, more elastic, and clearer, making it ideal for shoe foams and wire insulation. High VA content (28-40%) drastically improves adhesion and polarity, which is standard for Hot Melt Adhesives (HMA).

Is EVA (CAS 24937-78-8) compatible with other polymers for blending?

Yes. EVA is widely known as a "Universal Blender." It is highly compatible with PVC, PE, and PP, often added as an impact modifier to improve the flexibility and durability of rigid plastics without sacrificing structural integrity.

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: (C 2 H 4 ) x (C 4 H 6 O 2 ) 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.

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:
How does Vinyl Acetate (VA) content affect the performance of EVA resin?

A: The VA content is the most critical specification. Low VA content (5-10%) behaves like flexible Low-Density Polyethylene (LDPE), offering toughness and transparency for films. As VA content increases (18-28%), the material becomes softer, more elastic, and clearer, making it ideal for shoe foams and wire insulation. High VA content (28-40%) drastically improves adhesion and polarity, which is standard for Hot Melt Adhesives (HMA).
Q:
Is EVA (CAS 24937-78-8) compatible with other polymers for blending?

A: Yes. EVA is widely known as a "Universal Blender." It is highly compatible with PVC, PE, and PP, often added as an impact modifier to improve the flexibility and durability of rigid plastics without sacrificing structural integrity.

Documents

Documents and Product Support

For product review and sourcing evaluation, supporting documents can be coordinated according to the product type, inquiry stage, and order requirements.

COA for batch-based quality reference
TDS for key physical and chemical information
SDS / MSDS for handling, storage, and safety reference
Packing information for sample, trial, and bulk orders
Technical communication based on application and specification requirements

Quotation

Information to Confirm Before Quotation

Clear sourcing information helps reduce specification mismatch and allows a more accurate quotation before sample or bulk order discussion.

Product name and CAS number
Application or intended end use
Required purity, grade, or specification
Sample quantity, trial order, or bulk demand
Preferred packing form or net weight
Destination country or port
Required documents or compliance expectations

Storage & Handling

Packaging, Storage, and Handling Notes

Packaging form, storage conditions, shelf life, and shipment arrangements should be confirmed according to the product characteristics, package size, and destination requirements.

Before order confirmation, buyers are advised to review the corresponding product documents and confirm whether any special storage, labeling, or handling requirements apply.

Supply Support

Sample, Bulk Order and Repeat Supply Support

Support can be arranged for sample discussion, bulk supply planning, packaging confirmation, and routine sourcing communication based on the actual product and order requirements.

For repeat-use formulations or long-term procurement plans, buyers may discuss specification consistency, packaging preferences, delivery expectations, and document coordination in advance.

Contact Form

Use our contact form to send us your questions, suggestions or comments. We will respond as soon as possible.

Product Categories

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Adhesive Resin EVA Polymer Hot Melt Adhesive Polymer Resin

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