| 摘要 |
Fibers having thereon the dried residue of an aqueous coating composition having one or more elastomeric, curable polyurethanes, one or more-high molecular weight, high bailing point plasticizers and water have good flexibility and do not need to be preheated before incorporation with matrix polymers. The fibers also have greatly improved adhesion to various types of polymers and better resistance to the effects of water. In addition to the above ingredients for the impregnating coating composition, a number of other optional ingredients may be included. Ingredients such as a crosslinking agent present in an amount to at least partially cure the polyurethane, an emulsifier and/or a microcrystalline wax dispersion may be used. Other common fiber treating chemicals may be present also such as anti-static agents, pigments or dyes; silane coupling agents, fire retardants, etc. After the coating of the sized fibers, the coated fibers can be cured at ambient or elevated temperatures.
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