Comoso Controlled Motion Solutions

here are two general classes of polyurethane and both are commonly found in the market: ether-base and ester-base.  Chemically, these are made from two different polyol alcohols that cause similar, but different reactions in the isocyanate.  From the user’s standpoint, the ester-based polymer is less expensive. However, it degrades when exposed to moisture.  Because of this, we manufacture our Fre-Thane® polyurethane tubing using the ether-based material.