Re: Foam rubber questionsFoam prices are tied to the petroleoum industry and right now the prices of foam are skyrocketing. When I have to buy sheet foam for seat cushions, I pay (for a 52"x86"x3") over $100, and that's wholesale! To get foam into little chunks, it has to go through a chipper machine (you can't do it by hand). Now here's the kicker...animals relly don't like foam that well. There's something about the smell that makes them want to chew it up or stay away all together.Try this: It's called 'slick fiber' or 'fiber fill'. It's that soft poly material that most throw pillows and bed pillows have in them. Pretty inexpensive and you get a bunch for what you pay. It's available at most upholstery supply houses. If there isn't one near you, go to the local upholstery shop and ask them if they will order you a bag of it on their next delivery order. You can get it at Wal-Mart, Jo-Anns, Mae's, etc, but you'll pay a lot more, especially if you plan on doing a bunch of the beds.
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What does the foam's Density refer to and why is it important?Density, in pounds per cubic feet, is found by weighing a 12" cube of foam. Higher density foams will be more resilient and durable than lower density foams. Two foams may feel similar if they have the same compression or ILD, but there is no doubt the higher density foam will last longer before sagging.
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What is ILD?ILD stands for Indentation Load Deflection, and by knowing the ILD you can tell how firm the foam is. The ILD tells you how many pounds per cubic foot it takes to compress a 4" sample by 25% of its overall thickness. The lower the ILD the softer the foam, the higher the ILD, or the last two numbers of the grade's part number, the firmer the foam. Foams with similar ILD's will feel similar even if their density is different.
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Why does foam turn yellow when it ages?All foam oxidizes and will turn yellow when it ages. Just like when a penny becomes darker over time. This is a completely natural process that the foam goes through and in no way impairs the effectiveness of the foam.
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Will memory foam get firmer in colder temperatures?Yes, memory foam is a temperature sensitive material. Memory Foam is the only grade of foam where firmness is affected by room temperature. If the memory foam is used in a room that is colder than 60 degrees it will feel firmer, but will soften up when the body heats the foam during sleep.
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Can the difference between the various densities of Memory Foam be felt, and if it can, why are the higher density foams better?The main differences are in price and performance. Higher density memory foam equates to higher performance at a higher price. Lower density memory foam is still good for some pressure relief at a lower price. However, a denser Memory Foam will give you get more support and conform to your body more. Higher density memory foams are designed for premium mattresses and a longer comfort life.
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