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What is "ILD" - Definition & Explanation

Indentation Load Deflection (ILD) refers to the firmness of a piece of foam. The lab puts a 4" x 15" x 15" piece of foam on a flat surface. Then a round metal plate, 8" in diameter, pushes down on that piece of foam. The amount of pounds of pressure it takes to squeeze the 4" piece of foam to 3 inches (25% compression) is referred to as the ILD. A low ILD, such as 10, doesn't offer much resistance and is an extremely soft piece of foam. A piece of foam that takes 46 pounds of pressure

Some other terms

Some more terms:

A manufactured fiber similar to acrylic in characteristics and end-uses. Modacrylics have a higher resistance to chemicals and combustion than acrylic, but also have a lower safe ironing temperature...
Treatment or process designed to alter or improve the surface appearance, function or texture of a fabric. Examples include: mercerizing, calendaring, glazing, moiré, napping, shearing, cropping,...
A strong, firm, tightly woven, durable fabric usually of cotton but sometimes of linen, hemp or other fibers. It is usually plain weave but sometimes with a crosswise rib. It is produced in a variety...
A fabric of wool, also of rayon and silk. The name is derived from the French term eponge for "spongy". It is a very soft and sponge-like fabric in a variety of novelty effects with loose weave. ...
A double-knit fabric in which the rib wales or vertical rows of stitches intermesh alternatively on the face and the back of the fabric. Rib knit fabrics have good elasticity and shape retention,...

Companies for ILD:


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