No. 132 Prime Mover & Related Products
Development of a Method Cleaning Honeycomb Cores for Aircraft Structures using an Alternative to 1,1,1-Trichloroethane
Kawasaki Heavy Industries,Ltd. (KHI) has developed a reduced-pressure shower & vapor cleaning system using a normal paraffin-type hydrocarbon for degreasing metallic honeycomb cores prior to structural adhesive bonding,as an alternative to 1,1,1-trichloroethane(TCA). Our studies show that a normal paraffin-type hydrocarbon,which is a single-element material,does not reduce the node bond strength or corrosion resistance of the core,and obtains the very clean surface needed for adhesive bonding. Products manufactured with this alternative cleaning system satisfy the bonding strength and bond durability required for aircraft structures. Operation is safe because it is a closed,reduced-pressure system, and the system also outperforms TCA vapor degreasing.
—Generally Reports— K.T.R. No.132