Visco elastic foam is also known as memory foam. The polyurethane foam molds to a persons body shape. It is primarily used for mattresses and pillows.
Memory foam pillows do indeed keep the spine in alignment while sleeping as being kept at the head does this exact thing to the rest of the body. It is quite a miraclious invention.
There are many benefits of foam pillows. Some of the benefits are cheaper cost, no animal cruelty and abuse is involved and it is also considered to provide better posture for one's head while sleeping.
The advantage of a foam pillow, over a feather pillow is the comfort. Foam pillows are now made to form to each individuals head, neck, and sleeping style. Foams pillows are left often allergenic, and a standard foam pillow cost much less than some feathered pillows, such as goose-down.
With the invention of Tempur pillows, many people are finding that they are sleeping better. Tempur pillows are hypoallergenic, made of foam, easy to clean, and support all the proper pressure points.
Many products, such as sleeping mattresses, use Novaform memory foam. The memory foam is also used by various companies that sell pillows and blankets.
CPI spray is made of Polyurethane Foam. Polyurethane Foam is made by adding water to polyurethane plastics.
There are do-it-yourself polyurethane foam installation kits for sale at Fomo Foam. The kits come with foam and dispensing guns. There is a guide to polyurethane foam application at How To's and More. There are seven steps and pictures for each step.
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Absolutely. You can buy polyurethane foam at a place like this: http://www.uscomposites.com/foam.html
The medical uses of Polyurethane Foam include wound dressings for exudating wounds. You can see a list of them at http://www.thomasnet.com/products/polyurethane-foam-30683502-1.html
Memory foam pillows are more expensive than regular pillows because they are made of different materials designed by NASA scientists. They provide more support to your neck and spine relieving stress all over your body from sleeping in incorrect positions. They also conform to your body.