EVA Packaging Liner from China: Top Suppliers and Factory Solutions for Versatile Industrial Applications
Definition
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
(5) Density Versatility: Its wide density range allows for diverse applications.
II. Definition of EVA Packaging Liner
1. Definition: EVA packaging liners are inserts used inside metal boxes, paper gift boxes, whiteboard boxes, and plastic boxes to protect products (e.g., USB drives, jewelry, knives, precision instruments, and tools).
2. Classification:
- Eco-friendly coarse-celled EVA
- Standard EVA
- Food-grade odorless EVA
- Flame-retardant EVA
- Anti-static EVA
25°, 38°, 45°, 50°, 60°, 70°, 80°
Common industrial uses:- 38°–45° for foot pads
- 25°–38° for electronic components
- Standard EVA liner
- Flame-retardant EVA liner
- Anti-static EVA liner
Black, white, and colored EVA liners
Industrial preference: Black and white (colored liners are less common)
III. Manufacturing Process of EVA Packaging Liners
Uses a die and small press to cut EVA sheets.
Limitations:Thickness >3cm may cause uneven edges and depressions around cutouts. Not ideal for thick materials (e.g., 9cm requires layering).
Uses a CNC machine for precise, straight-edged cuts.
Advantage:Can produce thick liners (e.g., 9cm) in one piece (no layering needed).
IV. Advantages of EVA Packaging Liners
- Water Resistance: Closed-cell structure prevents water absorption.
- Chemical Resistance: Resists seawater, oils, acids, alkalis, and bacteria.
- Ease of Processing: No seams, high toughness, and easy to heat-press, cut, glue, or laminate.
- Shock Absorption: High elasticity and tensile strength provide superior cushioning for impact protection.
- Thermal Insulation: Excellent heat/cold resistance (suitable for extreme temperatures).
- Eco-Friendly: Non-toxic, odorless, recyclable, and compliant with EU packaging regulations.
V. Applications of EVA Packaging Liners
EVA liners are widely used in:
- Jewelry, ceramics, toolboxes, electronics, instruments
- Gift boxes, toys, handicrafts, cosmetics, medical supplies
- Hardware, wine, furniture, lighting, and other foam packaging fields
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