I’m Saying exactly the opposite. Fibre glass isn’t plastic, it’s a composite. In GFRP, glass fibre reinforced polymer, the nucleus is the glass fibre, the matrix is the resin. If your car is plastic it means it doesn’t have any kind of fibre reinforcements. But glass fibre in itself is just a cloth, a very annoying one, when you add the resin, it becomes GFRP, which is actually useful for something. So, GFRP is a composite, but not all composites have glass fibre as nuclei.
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