CORE MATERIAL FOR SANDWICH PANEL， SANDWICH PANEL AND MANUFACTURING METHOD OF SANDWICH PANEL

First polyester fibers that are single component fibers; And a second polyester-based fiber which is a sheath-core type bicomponent fiber. The present invention also provides a sandwich panel comprising a core material derived from a sandwich panel core material and a surface material disposed on both surfaces of the core material. The method may also include mixing a first polyester fiber which is a single component fiber and a second polyester fiber which is a sheath-core type bicomponent fiber; Manufacturing a core material from the mixed fibers by a dry manufacturing process; It provides a sandwich panel manufacturing method comprising a; and heating and pressurizing the core material.