Epoxy Resin Prepreg

Adhesion strength

≥30MPa (interfacial shear strength with carbon fiber) to ensure no debonding between fiber and matrix

Mechanical properties

Tensile strength ≥80MPa, flexural strength ≥120MPa, tensile modulus 3.0–4.5GPa

Curing characteristics

Low curing shrinkage ≤1.5% to avoid internal stress cracking of composite materials; curable at room temperature/medium temperature (60–120℃)/high temperature (150–200℃)

Process compatibility

Low viscosity (50–500mPa·s before curing), easy to wet carbon fiber tows/cloth with no bubble residue

Environmental stability

Acid and alkali resistance, aging resistance, glass transition temperature (Tg) 80–200℃ (classified by model)

Compatibility

Matched with carbon fiber surface treatment agents (silane coupling agents) to improve interfacial bonding force