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spray foam
Spray foam is a chemical product of materials which bubble and expand up to 280 times its liquid volume after it is sprayed in place. This expansion makes it useful as a specialty packing material which forms to the shape of the product being packaged and produces a high thermal insulating value with virtually no air infiltration.
==Packaging applications==
Spray foam is a very specialised packing material, often required for use in shipping valuable fragile items. Engineered packaging principles are designed to protect sculptures, vases, large fossils, lamp bases, busts, computers, furniture, chandeliers and other objects of unusual shape. By virtue of the liquid foam expanding by up to 280 times the volume of its liquid state, it efficiently protects almost any size, form and weight.
The custom fit of the molds, top and bottom, securely and uniformly cushions the object. There are many types of alternative materials that can be used to handle more specific needs.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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