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Page | 47 Vacuum Bagging for Resin Infusion • Release agent excess on sealing area - Application of release agents over the bag sealing area of the mould tool can prevent secure adhesion of sealing tapes and increase danger of the sealant tape lifting off the mould tool during vacuum bag cures. Masking the sealing areas during application of release agents will avoid poor sealant tape adhesion. • Sealant Tape Slippage – Side slipping of the sealant tape is a result of tension in the bagging film, this is usually due to the film being too small for the mould tool and bridging some of the tool shape. • Single layer of breather under vacuum valve – A single breather layer under the vacuum valve will not be enough to withstand the crushing effect of the hard vacuum valve base. To ensure adequate breather path under the valve use a vac-pad, a piece of PTFE coated glass fabric or 4 layers of N10 75mm x 75mm. • Vacuum valves or Hoses are blocked – resin can sometimes find its way into the vacuum valves and hoses during cure cycles. This will block the vacuum line and prevent flow of air. Hoses can be checked easily, with one end connected to the vacuum source depress the button in the centre of the socket on the free end to check air is flowing. With Vacuum Valves, check their base for signs of resin and depress the button on the quick disconnect plug to check valve can open.PDF Image | Vacuum Bagging for Resin Infusion
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