Application of different EVA Block materials

  EVA Block, ethylene-vinyl acetate copolymer foam block, is a lightweight, soft foam material with excellent cushioning properties. It is widely used in shoe materials, packaging, building sound insulation, toys and other fields. EVA Block has various manufacturing processes, and different processes and manufacturing processes can produce EVA Block materials with different properties.

EVA Block materials

  Manufacturing technology and process of EVA Block

  Continuous foaming process

  Process: Raw material preparation → Preheating → Mixing of foaming agent and catalyst → Measuring and transportation → Continuous foaming → Cooling → Cutting → Finished product.

  Product: EVA Block produced by continuous foaming process has a continuous and uniform cell structure, low density and high softness, and is suitable for packaging materials, floor mats, etc.

  Molded foam process

  Process: Raw material preparation → Preheating → Mixing of foaming agent and catalyst → Measuring and conveying → Pour into mold → Pressure foaming → Cooling → Demoulding → Finished product.

  Product: EVA Block produced by molded foaming process has various shapes, precise size and high hardness. It is suitable for sports shoe midsoles, insoles, etc.

  Injection foaming process

  Process: Raw material preparation → Preheating → Mixing of foaming agent and catalyst → Measuring and conveying → Injection machine injection → Foaming → Cooling → Mold opening and picking → Finished product.

  Product: EVA Block produced by injection foaming process has tight structure, high strength and good dimensional stability. It is suitable for small parts, toys, etc.

  Parameter differences of EVA Block materials

  The following is a table of parameter differences of EVA Block materials produced by different processes:

Process Continuous Foaming Mold Pressing Injection Foaming
Density (g/cm³) 0.15-0.25 0.20-0.35 0.18-0.28
Hardness (Shore A) 20-60 30-70 30-60
Tensile Strength (MPa) 1.5-4.0 2.0-5.0 2.0-4.5
Elongation at Break (%) 200-500 150-400 200-450
Compression Set (%) 10月30日 15-35 10月30日
Thermal Resistance (°C) -40 to +80 -40 to +80 -40 to +80
Water Absorption (%) <5 <5 <5
Chemical Resistance Good Good Good
Processability High Moderate High
Cost Efficiency Low to Moderate Low to Moderate High

  Summary

  As an excellent foaming material, EVA Block can produce EVA Block materials with different properties through different manufacturing techniques and processes. These materials play an important role in people’s daily lives due to their unique physical properties and wide range of applications. With the advancement of technology and market expansion, EVA Block materials will show their unique value in more fields.

Leave a Comment