首页>
外国专利>
METHOD OF OBTAINING GLAS FIBRE REINFORCED COMPOSITE MATERIAL AND MOULDED PRODUCT MADE OF SUCH COMPOSITE MATERIAL
METHOD OF OBTAINING GLAS FIBRE REINFORCED COMPOSITE MATERIAL AND MOULDED PRODUCT MADE OF SUCH COMPOSITE MATERIAL
展开▼
机译:获得玻璃纤维增强复合材料的方法以及这种复合材料制成的模制品
展开▼
页面导航
摘要
著录项
相似文献
摘要
Fiber-reinforced thermosetting polyester composites containing in excess of 30 wt %, based on the weight of the composite, reinforcing fiber, are made by a vacuum-assisted transfer molding technique from a 1-phase composite matrix precursor comprising a polyester, a reactive monomer, and a low-profile additive. The polyester has a molecular weight/double bond factor of between about 150 and 190, styrene is a preferred reactive monomer, and a preferred low-profile additive is a thermoplastic polymer with a weight average molecular weight in excess of 3,000 and which is miscible in the polyester and reactive monomer. The polyester composite is formed by coating the surface of a mold with a gel coat; applying a skin laminate over the partially cured gel coat; applying a fiber reinforcement to the skin laminate; closing the mold; and injecting the 1-phase matrix precursor while the mold is under vacuum. The hallmark of these composites is their combination of physical strength as measured by one or more standard strength tests for composites and smooth surface profile as compared to the thermosetting polyester composites made from a typical hand lay-up or spray up process, or a conventional vacuum-assisted transfer molding process.
展开▼