SELECTIVELY WEAKENED STRETCHED FILMS

摘要

PROBLEM TO BE SOLVED: To provide selectively weakened stretched films that can be used for a composite structure allowing control of movement of fibers within a matrix.SOLUTION: A film for a composite article may include a non-weakened portion and a weakened portion. The weakened portion may have at least one characteristic quantity which may be lower than that in the non-weakened portion. The property includes at least one of the tensile strength, the tensile modulus and the ultimate strain. The weakened portion forms the shape of at least one of a line and a tortuous path.