I. Process and Steps for Making EVA Block Toolbox Packaging Liners
EVA block, due to its excellent buffering and protective properties, is often used in the creation of toolbox packaging liners. The fabrication process typically involves the following steps:
Material Selection: Choose the appropriate thickness and hardness of EVA block material based on the toolbox’s size, shape, and the tools it needs to protect.
Cutting: Utilize cutting machines or hand tools to cut the EVA block into suitable sizes and shapes according to the toolbox’s dimensions and internal layout.
Forming: Apply heat or cold forming techniques to adapt the EVA block to the toolbox’s internal structure, ensuring that the liner closely fits the tools, providing optimal protection.
Bonding: If necessary, use EVA-specific glue or other adhesives to bond multiple EVA block components together, creating a complete liner structure.
Trimming and Finishing: Remove any excess material and refine the liner’s shape to ensure a perfect fit with the toolbox.
Inspection and Packaging: Check the liner for any imperfections, clean it, and then place it inside the toolbox for final packaging.
II. Protective Properties and Advantages of EVA Block Liners
EVA block liners offer the following advantages for tools within a toolbox:
Shock Absorption: EVA block’s excellent elasticity and buffering capabilities effectively absorb impacts and vibrations during transportation, safeguarding tools from damage.
Non-Slip and Secure Fit: The liner’s close fit ensures tools do not slide or shift within the box, maintaining neatness and stability.
Water Resistance: EVA block material exhibits water-resistant properties, protecting tools from moisture and corrosion.
Durability and Longevity: EVA block’s resistance to wear and aging ensures a long-lasting liner that maintains its integrity and appearance.
III. Hardness Selection and Applications of EVA Block Liners
EVA block’s hardness can be adjusted based on specific requirements, ranging from Shore A 20 to 70. Different hardness levels are suitable for various packaging needs:
| Hardness Range (Shore A) | Application Scenarios |
| 20-30 | Lightweight and soft, suitable for delicate instruments and fragile items |
| 30-40 | Moderately soft, suitable for general electronics and small tools |
| 40-50 | Moderate hardness, suitable for medium-weight and medium-sized tools and equipment |
| 50-60 | Harder, suitable for heavy-duty tools and large mechanical equipment |
| 60-70 | Very hard, suitable for packaging requiring extreme support and protection |
IV. Comparative Table of EVA Block Liner Parameters
Below is a simplified comparative table of EVA block liner parameters, primarily presented in numerical data:
| Parameter | Data Range |
| Density (g/cm³) | 0.15 – 0.35 |
| Hardness (Shore A) | 20 – 70 |
| Tensile Strength (MPa) | 1.5 – 5.0 |
| Elongation at Break (%) | 200 – 500 |
| Compression Set (%) | 10 – 35 |
| Heat Resistance (°C) | -40 to +80 |
| Water Resistance (24-hour Water Absorption Rate) | < 5% |
| Chemical Stability (Resistance to Oil, Acids, and Alkalis) | Good |
| Processability (Cutting, Forming, Bonding) | Easy |
| Cost-Effectiveness (Compared to Other Materials) | Moderate to High |
Please note that these data ranges are provided for reference purposes only. Actual parameters may vary depending on the manufacturer, brand, and production process. When selecting EVA block liners, it is recommended to choose the appropriate hardness and parameters based on specific application scenarios and tool requirements.