摘要:
A method of moulding fibre reinforced resinous material comprising utilising a prepreg having a curing temperature of below 80°C and moulding the article at below this temperature using heat, or other suitable physical or physio-chemical means, using a mould which is not dimensionally stable at conventional prepreg moulding temperatures.
摘要:
In an improved method of moulding fibre reinforced composite armour, a prepreg of fibre reinforcement preimpregnated with a resin and hardener is laid on an article to be armoured. The resin and hardener are capable of at least partial curing at a temperature below 80°C. The prepreg is cured at a temperature not greater than 80°C while applying pressure, to form an armour layer conforming to the surface of the article to be armoured. The use of the actual article as a mould for the prepreg ensures that the armour layer closely conforms to the article.
摘要:
In an improved method of moulding fibre reinforced composite armour, a prepreg of fibre reinforcement preimpregnated with a resin and hardener is laid on an article to be armoured. The resin and hardener are capable of at least partial curing at a temperature below 80°C. The prepreg is cured at a temperature not greater than 80°C while applying pressure, to form an armour layer conforming to the surface of the article to be armoured. The use of the actual article as a mould for the prepreg ensures that the armour layer closely conforms to the article.
摘要:
A method of moulding a fibre reinforced resinous material comprising providing fibrous reinforcement in an initially uncured resin matrix, initiating a cycle which will result in the curing of the matrix and which includes an initial cure phase and a post cure phase, and selecting any one or more of the resin system, cure phases or initial cure temperature so that the sum of the fractional thickness change during the initial cure phase and the fractional thickness change during the post cure phase being equal to or differing by a predetermined amount from the fractional dimensional change in the plane of the fibre reinforcement at the desired end-use temperature at which greatest dimensional accuracy is required.