EVA Pad

Material Fundamentals

Chemical Architecture
Ethylene Vinyl Acetate (EVA) copolymers represent a unique class of closed-cell foams where vinyl acetate content (typically 10%-28%) directly dictates flexibility and softness. The cellular structure is achieved through physical foaming processes, creating a matrix of interconnected closed cells that provide exceptional energy absorption characteristics.

Performance Matrix

Property	Technical Specification	Engineering Significance
Density Range	0.03-0.25 g/cm³	Weight optimization for applications
Hardness Scale	Shore C 15-80	Customizable compression resistance
Temperature Stability	-50°C to 80°C	Environmental performance range
Compression Set	<15% @22h/70°C	Long-term structural integrity
Water Absorption	<1% @24h immersion	Hydrophobic performance
Tear Strength	3-8 kN/m	Mechanical durability index

View Product: EVA Pad

Advanced Material Variants

Cross-Linked EVA

• Peroxide or silane cross-linking enhances molecular bonding
• Improves compression set by 40% compared to non-cross-linked versions
• Superior resilience for dynamic loading applications

Engineered Composite EVA

• Fiber-reinforced variants for structural applications
• Hybrid compositions with rubber for enhanced elasticity
• Filler-modified versions for specific gravity adjustment

Application Engineering

Electronics Packaging

• Custom-molded EVA inserts for sensitive component protection
• Anti-static formulations (10^6-10^9 Ω surface resistance)
• Vibration damping for transportation and handling

Automotive Systems

• Battery module cushioning with thermal management properties
• Interior trim components requiring energy absorption
• Sealing gaskets with environmental resistance

Medical Equipment

• Patient positioning pads with biocompatible certifications
• Equipment vibration isolation for precision instruments
• Sterilizable versions for surgical applications

Manufacturing Technology

Compression Molding

• High-pressure formation for consistent cell structure
• Minimum thickness: 1.5mm with ±0.2mm tolerance
• Maximum dimensions: 2000x1000mm press capacity

Continuous Lamination

• Multi-layer composites with adhesive systems
• In-line quality monitoring for thickness control
• Custom surface textures and embossing patterns

Quality Assurance

• IATF 16949 compliance for automotive applications
• ISO 13485 certification for medical devices
• UL 94 HF-1 flammability ratings
• RoHS and REACH environmental compliance

Technical Selection Guide

For impact absorption: Choose lower density (0.03-0.10 g/cm³) with high rebound
For structural support: Select higher density (0.15-0.25 g/cm³) with cross-linking
For environmental resistance: Specify closed-cell content >90%
For cost-sensitive applications: Consider non-cross-linked formulations