You can also use "glue" to repair airplanes. Do you believe it?
When the flap surface of the aircraft is damaged, the staff often use an adhesive called epoxy resin for repair. The staff dug the damaged honeycomb material and filled it directly with epoxy resin. Epoxy resin is widely used in the bonding between many non-metallic materials or between metal and non-metallic materials on aircraft. Using epoxy resin to repair aircraft is simple and takes a short time, but the effect is particularly good.
In fact, in order to reduce weight, epoxy resin is also used in the manufacture of aircraft shell. The composite made of special epoxy resin and carbon fiber under high temperature and high pressure has higher strength than steel, aluminum alloy and titanium alloy. Because of its light weight and high strength, it has become the darling of the aerospace industry. This material is used on the shell of the Shenzhou series spacecraft developed by China.
Specifically, epoxy resin is an organic polymer compound with two or more epoxy groups in the molecule. Because its molecular structure contains active epoxy groups, it can cross-linked with various types of substances to form insoluble and immiscible polymer with three-dimensional network structure. It has the advantages of convenient curing, strong adhesion and high chemical stability.
In addition to being used as adhesives, epoxy resin can also be used as coatings for large oil and gas pipelines, made into High-strength thermosetting plastics, used in dry-type transformers, and made into epoxy resin concrete with good toughness and high impact strength.