This technique is based on the use of prepregs – a semi-product consisting of the duly arranged and impregnated with binder reinforcement fibres. The prepreg hardens in the autoclave, a hermetically closed vessel under a specific temperature and pressure.
This is the most expensive composite production technology and it is used mainly in the aerospace and sports industries. Any part made in the autoclave has a higher surface quality, less porosity, and excellent mechanical properties.
Examples of application:
1. sports equipment 2. prostheses 3. elements of the sports car body 4. unmanned aerial vehicles 5. aircraft hull parts
Main suppliers:
Basic materials:
SIGRAPREG
Prepregs of glass, carbon or aramid fibre impregnated with epoxy or phenol resins. Prepregs can be woven or multiaxial.
SV3000
Pink multilayer vacuum film, which is perfect for high-temperature hardening of aerospace composition materials in the autoclave.
AB10
Heavy non-woven polyester drainage, which is ideal for ovens and high-pressure autoclaves.
A6000
High-temperature robust fluoropolymer release film with excellent anti-adhesion properties and high elongation.
FLASHTAPE 2
Turquoise colour polyether sticky tape with self-adhesive acrylic/silicone glue and excellent temperature and pressure resistance.
60001
White release fabric of medium-weight polyester, which quickly and easily releases from most resin systems.
SM5142
Yellow sealant tape with good adhesivity and elasticity, which is ideal for hardening in the open air, in the furnace or in an autoclave.
FF03PM
Non-porous PTFE-coated fiberglass plain weave fabric used as a release fabric to prevent the resin draining through the release fabric. Transfers gloss onto the laminate.
TRE45ECO
Semi-permanent aviation-grade release agent. Developed to ensure the release of any temperature-reactive resins. Does not leave traces on the released surface, which is especially important for the following gluing.
Advantages of the technique:
1. automated control of the production processes 2. optimal ratio of binding and reinforcing materials 3. excellent design properties of the product due to the precise arrangement of the material
Disadvantages of the technique:
1. high price of the equipment and technology 2. high requirements for the materials, equipment and workforce 3. long start-up, certification and approval procedure
