EVA Packaging Liners from China - Top Suppliers and Factory for Industrial Packaging Solutions
Definition of EVA
EVA (Ethylene Vinyl Acetate Copolymer) is a copolymer of ethylene and vinyl acetate. Its Chinese chemical name is ethylene-vinyl acetate copolymer (or ethylene-acetic acid vinyl ester copolymer). Typically, the vinyl acetate (VA) content ranges from 5% to 40%. Compared to polyethylene (PE), EVA has reduced crystallinity due to the introduction of vinyl acetate monomers, which enhances its toughness, impact resistance, filler compatibility, and heat-sealing properties. It is widely used in foam shoe materials, functional greenhouse films, packaging films, hot-melt adhesives, wires and cables, toys, and more. In the new energy sector, it is also applied in photovoltaic materials and solar cell adhesives.
Properties of EVA
EVA exhibits rubber-like elasticity and remains flexible even at temperatures as low as -50°C.
It has high transparency, surface gloss, and excellent chemical stability, with strong aging and ozone resistance. It is completely non-toxic.
EVA is easily processed and molded, and its shock resistance surpasses polystyrene foam (EPS). Unlike traditional foam materials, it can be precisely cut and shaped for protective packaging.
EVA meets strict eco-friendly standards, making it an ideal choice for export products. Its wide density range allows for highly diverse applications.
EVA Packaging Liners
Definition of EVA Packaging Liner
EVA packaging liners are custom inserts used inside metal boxes, paper gift boxes, whiteboard boxes, and plastic boxes to protect delicate products such as USB drives, jewelry, knives, precision instruments, and tools.
Classification of EVA Liners
- Eco-friendly coarse-celled EVA
- Standard EVA
- Food-grade odorless EVA
- Flame-retardant EVA
- Anti-static EVA
Available in 25°, 38°, 45°, 50°, 60°, 70°, and 80°.
- 38°–45°: Commonly used for foot pads
- 25°–38°: Ideal for electronic components
Available in black, white, and various colors. Black and white are the primary industrial preferences, while colored liners are less common.
Manufacturing Process of EVA Packaging Liners
Uses a die and a small press to cut EVA sheets.
Limitations: Thicknesses greater than 3cm may cause uneven edges and depressions around cutouts. It is not ideal for very thick materials (e.g., 9cm requires multi-layer lamination).
Uses a CNC machine for highly precise, straight-edged cuts.
Advantage: Can produce thick liners (e.g., 9cm) in a single piece without needing any layering or lamination.
Advantages & Applications
- Water Resistance: Closed-cell structure prevents water absorption.
- Chemical Resistance: Resists seawater, oils, acids, alkalis, and bacteria.
- Ease of Processing: No seams, high toughness; easy to heat-press, cut, glue, or laminate.
- Shock Absorption: High elasticity and tensile strength provide superior cushioning.
- Thermal Insulation: Excellent heat and cold resistance.
- Eco-Friendly: Non-toxic, odorless, recyclable, and compliant with EU regulations.
EVA liners are widely implemented across various foam packaging fields:
