PEVA素材とは？PEVA、EVA、PVCの違いは？

What is PEVA Material?

PEVA (Polyethylene Vinyl Acetate) is a material that may not be widely recognized by many. In the field of chemistry, it is referred to as polyethylene-vinyl acetate. It is a combination of two materials, PE (Polyethylene) and EVA (Ethylene Vinyl Acetate), making it versatile in everyday applications. This article will provide a deeper understanding of what PEVA is and explore the differences between PEVA, EVA, and PVC.

What is PEVA Made Of?

PEVA is a blend of PE and EVA materials, mixed in specific proportions. This combination results in a material that is flexible with a slight elasticity. The properties of PEVA can vary depending on the ratio of PE and EVA in the mix. For instance, if the PE content is higher, the material becomes less adhesive, which can be ideal for producing films or coatings.

Differences Between PEVA, EVA, and PVC

1. Biodegradability
   PEVA is environmentally friendly. Whether discarded or incinerated, PEVA does not harm the environment and is considered biodegradable.
2. Price
   PVC materials that contain harmful additives are cheaper than PEVA. However, non-toxic PVC (free of phthalates) tends to be more expensive than PEVA.
3. Density
   The density of PEVA ranges between 0.91 to 0.93, while PVC’s density is higher at 1.32. This lower density makes PEVA a lighter material.
4. Odor-Free
   PEVA does not emit any unpleasant odors, unlike some materials that may release ammonia or other organic smells.
5. Heavy Metal-Free
   PEVA is free from heavy metals, making it safe to use. It meets international safety standards such as EN-71 Part 3 and ASTM-F963.
6. Safe for Children’s Products
   Toys made from PEVA are safe for children as they do not contain harmful phthalates or plasticizers that could pose health risks.
7. Wide Range of Applications
   PEVA is widely used due to its high transparency, softness, and durability. These qualities make it ideal for various applications.
8. Resistance to Extreme Cold
   PEVA can withstand extremely low temperatures, even down to -70°C, making it suitable for use in frozen storage environments.
9. Resistance to Various Substances
   PEVA can resist water, salt, and many other substances, making it durable in a wide range of conditions.
10. Strong Heat Adhesion
    PEVA has excellent heat adhesion properties, allowing it to firmly bond to materials like nylon, polyester, and canvas.
11. Low Bonding Temperature
    The low bonding temperature of PEVA allows for faster production speeds and enhanced stability in manufacturing.
12. Customizable for Printed Products
    PEVA can be used for custom and decorative products, such as those requiring silk screening or offset printing. However, EVA-based inks must be used for printing on PEVA.

結論

After reading this, you should now have a better understanding of what PEVA material is. While PEVA may be more expensive than some alternatives, it is highly practical due to its safety and versatility in a wide range of applications.