Impregnation property across carbon f iber stacks under vacuum pressure

Impregnation behavior of fluids across the unidirectional weave stacks in the t ransverse direction of fibersunder vacuum pressure was investigated elementally by using self-designed tools , and parameters of the operationalmethod were standardized by a series of experiment s. The impregnation properties of distilled water , phenol aldehyde solution , and glycerol in carbon fiber weave stacks were studied by changing the vacuum pressures. The result sshow that the impregnation velocity of fluids improves with increasing the vacuum pressure applied. Under the samevacuum pressure , the impregnation velocity of the distilled water is the fastest . The impregnation velocity of theglycerol is faster than that of the phenol aldehyde solution at 5 kPa and 20 kPa vacuum pressure , while the phenolaldehyde solution is faster than the glycerol at 40 kPa and 60 kPa.