polyurethane (pu and also called polyester) – is a spongy foam like the consistency of foam used in pillows or mattress covers. it is an open cell material which ...
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Get Pricepolystyrene (ps) /ˌpɒliˈstaɪriːn/ is a synthetic aromatic hydrocarbon made from the monomer styrene. polystyrene can be solid or foamed. general-purpose polystyrene is clear hard and rather brittle. it is an inexpensive resin per unit weight. ..... animals ...
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