Different of polyalter thread and the polyester thread.
|Polyalther thread urethane foam||Polyester thread urethane foam|
|Physics type features / specific characteristic||Strength||Strength is 1 kg per unit square centimetre and keep pulling 2 times above.||30% ~ 100% than polyalther, also can pull 2 times and above|
|Softness||Except special types, generally, from the different way of power, the softness and coverness is good.||Softness is not as good as polyalther, have hard touching feel.|
|Chemical type features / specific characteristic||Water check / test||No reaction with water power test and not absorb water. No chemical problem in water test.||Reaction same as polyalther, add on non neutrality PH liquid will make embrittle.|
|Oil check / test||Content solvent, easywet, when wet, strength will reduce, but chemical function no change, when dry will cover back.||Compare with the polyalther, hard to get wet or not wet at all. When wet, strength not change too much and chemical function is ok.|
|Others||Heat check / test||Same as hot plasticity resin foam, which has no soften point, when heated, will melt to gas directly.||Same as polyalther, melting is much than polyalther, so, polyester totally can be melted.|
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Soft Polyurethane Foam
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