There are many classifications and types of foam. Some are specific to certain applications, and others have qualities that make them suitable for many industries.
The foam materials we choose for a given application can limit and impact the fabrication methods we use to shape them, thus limiting our customization options.
In addition, the foam we choose can impact the budget of our projects, the cost of the product, and its packaging, among other factors. In other words, choosing the right type is important for your foam-cutting project.
What is Foam?
Foam is a widely used and versatile material for cushions and protecting products that need ultimate protection and special handling.
In the industry, we will find different types of foam with various densities, thicknesses, and fire retardant or anti-static properties that can meet our specific applications.
It is important to ensure the foam we use is dense enough to absorb the shocks and impacts that our investments might encounter.
Understanding Foam Compression Strength
Compression strength is the most important testing value to evaluate form products for use in comfort applications to determine their usability. Usually, this value helps rate the firmness and feel of foam by testing how it supports or yields to the applied weight. This value is the simplest way to sort materials, making choosing the type of foam for your project much easier. We evaluate compression strength through ILD (Indentation Force Deflection).
Foam Firmness vs. Density
Some people think that a higher density translates into a firmer foam. That’s not true. A foam with low density can be firm, while a foam with high density might be soft.
Looking at ILD charts, you will realize that foam comes in various forms of firmness, ranging from soft to firm. For instance, you can get a High Resilience foam in 3.0 and 2.8 lbs. In this case, foam density doesn’t correlate with firmness.
Common Types
With many foam suppliers and products, choosing the right type for your project won’t be easy, especially when you aren’t conversant with terms such as density and grades. To help you make the right choice, here are examples of common foam types you can use for your project:
1. Polyurethane Foam
This comes in different firmness and densities, making it suitable for various applications. Users use it in interior furniture. Thanks to its insulation qualities and comfort, you can also use it in the following applications:
- Insulation
- Carpeting
- Cushions
- Carpeting
2. Polyethylene Foam
This is a closed-cell type foam that comes with unique cushioning and shock absorption properties. Its materials are mostly used in automotive applications, floatation devices, packaging, and sports equipment.
3. Memory Foam
Polyurethane foam is mostly used because it is incredibly temperature-sensitive and soft. It moulds to different body shapes and provides pressure relief.
The bottom line is that your project doesn’t just require you to use the right tools, blades, and techniques to achieve clean and accurate results. You also need to choose the right foam type. However, the type you choose depends on your project’s needs.
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