4-Layer Insulation Design

31-03-2025

4-Layer Insulation Design: Technology Meets Practicality

In today’s fast-paced world, insulated bags have become an essential tool for daily life. 

Whether you’re heading out for a picnic, traveling long distances, or simply commuting to work, 

a high-quality insulated bag ensures your food and beverages stay fresh and at the perfect temperature. 

With advancements in technology, the design of insulated bags has evolved significantly, 

and this 4-layer insulation design is a perfect example of innovation and practicality combined.

cooler bag

4-Layer Insulation: Layered Protection for Long-Lasting Temperature Control

This insulated bag features a 4-layer insulation design, with each layer carefully selected and optimized 

to ensure excellent performance in insulation, water resistance, and durability. 


Here’s a breakdown of the four layers:


Fabric with Waterless Dyeing Technology

The outer layer of the bag is made from fabric treated with waterless dyeing technology. 

This eco-friendly process reduces water usage during production while maintaining the fabric’s vibrant color and durability. 

The outer layer is not only aesthetically pleasing but also resistant to scratches and stains, making it perfect for everyday use.


High-Density EPE Foam

The second layer is high-density EPE (Expanded Polyethylene) foam, a core material that provides exceptional insulation. 

This foam effectively blocks heat transfer from the outside, extending the insulation time of the bag. 

It is also lightweight and impact-resistant, ensuring that your items remain protected from bumps and pressure.


Non-Woven Fabric

The third layer is non-woven fabric, which offers excellent breathability and softness. 

This layer prevents condensation from forming inside the bag, keeping the interior dry and clean. Additionally, 

non-woven fabric enhances the structural strength of the bag, making it more durable over time.


Food-Grade PEVA Material

The innermost layer is made from food-grade PEVA (Polyethylene Vinyl Acetate) material, which is safe and non-toxic, 

meeting food contact standards. This material provides excellent water and moisture resistance, preventing liquids from seeping through 

and ensuring the interior remains clean and hygienic.


Advantages of the 4-Layer Design

The 4-layer insulation design offers several key benefits:

Long-Lasting Insulation: The combination of multiple insulation materials ensures that the bag maintains its temperature for extended periods, 

keeping cold items chilled and hot items warm.

Eco-Friendly and Durable: The waterless dyeing technology and food-grade PEVA material make the bag environmentally friendly and safe for use. 

The high-density EPE foam and non-woven fabric enhance durability, ensuring the bag lasts longer.

Versatile Use: This insulated bag is suitable for a wide range of activities, from daily commutes to outdoor adventures, 

providing practical convenience for users.


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