Discussion
Consider the following statements about composite manufacture:
1. Prepreg gives close control of fibre volume fraction.
2. Autoclave cure applies both heat and external pressure.
3. Prepreg can be stored indefinitely at room temperature.
Which of the statements given above is or are correct?
Answer: D
Correct answer: 1 and 2 only
Statements 1 and 2 are correct: prepreg arrives with its resin content already fixed, giving close control of fibre volume fraction, and the autoclave applies heat and external pressure together to consolidate the laminate and drive out voids. Statement 3 is wrong - prepreg has a limited out-life and must be kept frozen, since the resin continues to advance slowly at room temperature.
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