http://testresources.com/applications/foam_test.aspx WebHow do you calculate ILD? ILD (Indentation Load Deflection), is a measure of the softness or firmness of a given piece of foam. ILD is measured by applying downward pressure from a 12-inch round disk into a 4-inch …
Foam Performance - Polyurethane Foam Association
WebILD Test of Polyurethane Cushions and Pillows The firmness of a polyurethane foam cushion and pillows is measured by performing a test called indentation load deflection, or ILD. To the manufacturer and final user, it is one of the more important quality tests related to the firmness of the end product. WebIndentation Force Deflection (IFD) - also known as Indentation Load Deflection (ILD), is the measure of a foam material's resistance to a compression force. This measure is used to determine the "firmness" or "softness" of the foam. IFD is the amount of force it takes to compress a sample to a specified amount of deflection. impact call activity
Understanding Foam Firmness and Compression Strength - Foam …
WebPhysical or mechanical testing of structural foam or cellular urethane or polyurethane is needed to perform R & D on new products as well as to ensure quality of materials. … WebILD, or Impression Load Deflection, is a measure of the softness or firmness of a foam mattress. ILD is measured by pressing a 12-inch round disk into a 4-inch piece of foam until it presses 25% or one inch into the mattress surface. The amount of weight or pressure required to compress the mattress to that extent is the ILD. WebOct 18, 2011 · ILD is measured by taking a 15 inch by 15 inch by 4 inch section of foam and measuring the force in pounds that it takes a 50 square inch circular plate to compress the material 25 percent of its thickness. If a foam section requires 36 pounds of pressure to reach 25 percent compression, it has an ILD value of 36. impact california social studies 6th