Composite pre-bonding treatment method

A composite pre-bonding treatment method performed when bonding a composite material to a member, the composite pre-bonding treatment method comprising:

• attaching an absorber adapted to absorb a contaminant to a surface of a prepreg laminate that is a precursor of the composite material;
• covering the prepreg laminate with a packaging material from above the absorber;
• vacuuming the packaging material and heating the prepreg laminate at a temperature lower than a curing temperature of a prepreg of the prepreg laminate and under a condition where a matrix resin of the prepreg is not gelled;
• then removing the packaging material;
• peeling off the absorber from the prepreg laminate with the matrix resin not gelled;
• attaching, to a surface of the prepreg laminate with the absorber peeled off, a release member that does not transfer silicone or fluorine to a resin, and then completely curing the prepreg laminate to mold the composite material;
• peeling off the release member from the composite material before bonding the member;
• and
• after peeling off the release member and before bonding the member, applying hydrophilic treatment to a surface of the composite material on which the release member was attached,
• wherein the release member is a non-transfer silicone film consisting of silicone having a molecular weight of 2000 or higher and/or a non-transfer fluorine film consisting of fluorine having a molecular weight of 2000 or higher.