EVA DuPont 250
EVA DuPont 250
Product Introduction EVA DuPont 250 resin features vinyl acetate (VA) content of 28 wt%. With good flexibility, elasticity and processability, it is a well‑balanced material widely used in many fields.
Main Applications
Shoe‑material Industry: Commonly used for shoe soles and insoles to improve flexibility and impact resistance for better wearing comfort.
Toy Manufacturing: Used for plastic toys with good safety and durability.
Sports Goods: Applied in various sports equipment such as mats and sports‑apparatus accessories.
Packaging Materials ‑Food Packaging: Compliant with FDA 21 CFR 177.1350(a)(1), suitable for food‑contact packaging articles. ‑Industrial Packaging: Foam cushions and shock‑absorbing materials to protect goods against damage during transportation.
Wire and Cable: Used for wire sheaths to provide electrical insulation and mechanical protection.
Hot‑melt Adhesives & Sealants: Suitable for adhesives and sealants.
Automotive Accessories: Automotive interior materials and sealing materials.
Household Articles: For manufacturing various daily consumer goods.
Performance Parameters
| Performance Category | Test Item | Test Standard | Test Data | Unit |
|---|---|---|---|---|
| Basic Physical Properties | Vinyl Acetate (VA) Content | ‑ | 28 | wt% |
| Melt Flow Rate (MFR) | 190°C/2.16 kg | 25 | g/10min | |
| Density | ASTM D792, ISO 1183 | 0.921‑0.950 | g/cm³ | |
| Mechanical Properties | Tensile Strength | ASTM D1708 | 11 | MPa |
| Elongation at Break | ASTM D1708 | 800‑1000 | % | |
| Tensile Modulus | ASTM D1708 | 19 | MPa | |
| Shore Hardness | ASTM D2240 | 75 | ‑ | |
| Thermal Properties | Melting Point (DSC) | ASTM D3418, ISO 3146 | 70 | ℃ |
| Vicat Softening Point | ASTM D1525, ISO 306 | 42 | ℃ | |
| Ring‑and‑Ball Softening Point | ASTM E28 | 127 | ℃ |
Applicable Processes
‑Injection Molding: For toys, automotive parts and household‑appliance components. ‑Extrusion Molding: Commonly used for films, sheets and wire‑cable sheaths. ‑Blow Molding: For hollow articles. ‑Foaming Molding: For foamed products such as shoe materials and padding materials. ‑Hot‑melt Processing: Suitable for preparation of adhesives and sealants.
Processing Characteristics
Drying: Drying before processing is recommended if the material absorbs moisture to avoid bubbles or silver streaks in finished parts. Refer to supplier’s recommendations for specific drying temperature and duration.
Processing Temperature: Critical for EVA processing. Maximum processing temperature shall not exceed 230°C (446°F). Sustained melt temperature above 230°C may cause thermal degradation of EVA and release corrosive by‑products. Typical processing temperature shall be adjusted according to actual equipment and products.
Mold Temperature: Relatively low mold temperature such as 20‑40℃ is recommended.
Equipment Selection: Conventional thermoplastic‑processing equipment can be adopted, including ordinary extruders designed for polyethylene processing.
Cooling: Products normally require rapid cooling for setting.
Note: All data above is for reference only.
