How far can you stretch before you snap? Only you can answer that question — but when it comes to foam, we can answer that question. Tensile strength is one of the most important features to look for when choosing the type of foam for your packaging. Here’s what it is and why it matters.
To put it simply, foam tensile strength is the measurement of foam’s ability to stretch before breaking. Tensile is just a fancy way of saying tension. So, tensile strength refers to how strong foam’s tension is.
However, note that there’s a similar measurement called tear strength that measures foam’s ability to resist tearing after damage.
Related Content: Tensile Strength vs Tear Strength for Foam Packaging
Four of the biggest factors that determine foam tensile strength are:
Measuring foam tensile strength involves a universal testing machine, or tensile testing apparatus, and four simple steps:
This number is noted on a foam spec sheet in terms of PSI - so the higher the PSI, the more resistant that type of foam is to tearing.
Related Content: 3 Key Takeaways from a Foam Spec Sheet
Foam tensile strength matters in foam packaging because it determines how well a material resists tearing, stretching, and other damages when tension is applied. Depending on your product, packaging, and shipping methods, a high tensile strength may be necessary to ensure no damage during transit.
This video describes the difference between Tear Strength and Tensile Strength. Pick and Pluck foam may have a high tensile strength, but the tear strength is very weak, especially when the walls get thin.
Get it right by working with a foam packaging expert. As a leader in the packaging industry, Foam Industries has set the bar with an unwavering commitment to quality, exceptional client service, and constant innovation. Through our extensive inventory of endlessly customizable products, we ensure you find exactly what you’re looking for.
Foam Industries is a custom protective packaging company specializing in foam – with additional wood and plastic fabrication services. Our custom foam fabrication services are ideal for any type of packaging, display, or support service needed – from design to finished product.