You may have experienced that after a short time, the seat of your home furniture sags, or conversely, you have seen a car seat that retains its original shape even after 10 years. In the polymer manufacturing industry, the secret to this difference in quality is summarized in two words: “Hot Foam” and “Cold Foam”.
Many buyers assume these names are merely marketing terms, but in reality, the difference lies in the chemical formulation and baking method, which directly impacts your wallet and the product’s lifespan. In this educational article, we examine the most accurate identification methods and technical differences between these two widely used types of foam.
1. Hot Foam; Baking in a high-temperature oven
As the name implies, hot foam is produced through a process that requires direct heat. In foam manufacturing factories, raw materials enter special ovens after mixing to be technically “baked”.
The distinctive feature of hot foam is its relative firmness and dryness. Although this type of foam is used in the furniture industry, it has less elasticity (resilience) compared to its competitor. The biggest weakness of hot foam is that over time and due to continuous use, its cellular structure breaks down and it suffers from thickness loss.
2. Cold Foam; Superior technology with high durability
On the other hand, there is Cold Foam. Why is it called cold? Because its formation and baking process take place at a low temperature and with indirect heat. This production method gives the polyurethane foam molecules the opportunity to find a more regular and coherent structure.
The result of this process is a foam that:
- Is much softer and more flexible.
- Has extraordinary elasticity (returns to its original state quickly).
- Has very high resistance against deformation and sagging.
That is why cold foam is always used in car seats (which must withstand the passenger’s weight for years) and expensive classic furniture.
💡 Quick Detection Test (Finger Test):
“How do we know if the foam is cold or hot when buying a sofa? Just press the foam with your thumb and remove your finger after a few seconds. If the finger mark remains on the foam and rises slowly, you are dealing with hot foam. But if the foam returns to its initial state immediately and with a bounce, it is cold foam.”
– Foamiran CEO
Technical Comparison Table: Which one is more suitable for you?
To make a smart choice between these two materials, we need to take a close look at their functional characteristics. The table below shows the key differences:
Conclusion: Quality is not accidental
Ultimately, the choice between cold and hot foam depends on your budget and intended use. If you are a manufacturer and intend to offer a product with a long-term warranty, cold foam is definitely a more professional choice. Precise knowledge of raw materials, whether in the field of polyurethane foams or EVA foam (which is Foamiran’s specialty), defines the boundary between an ordinary manufacturer and a reputable brand.
Looking for the highest quality industrial foams?
It does not matter if you need EPDM foam for an automotive production line or are looking for EVA foam for bag production. By utilizing the world’s latest technology and a precise quality control laboratory, Foamiran delivers a product that passes global standards.
