The blow moulding process has been employed since about 1950, though its application to polyamides came much later. In recent years the development of technical blow moulding materials has been pushed ahead, so that there are now a considerable variety of them. With Polyamide 6 there are now types ranging from good to very high impact strength. The reinforced types are being produced with 15 % and 20 % glass fibre reinforcement.
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