WHAT IS THE CORRUGATED?（什么是瓦楞纸） Corrugated fiberboard or "combined board" has two main components: the liner (面纸）and the medium (芯纸). Both are made of a special kind of heavy paper called containerboard (箱板纸). Linerboard (瓦楞纸箱外层的高强箱板纸) is the flat facing that adheres to the medium. The medium is the wavy, fluted paper (楞纸) in between the liners. COMMON BOARD STYLES 常用纸板的种类 A、Single Face: One medium is glued to one flat sheet of linerboard. 单面纸板：一层芯纸粘接在一层平面箱板纸上。 B、Single Wall: The medium is between two sheets of known as Double Face. 单瓦楞纸板：芯纸粘在二层箱板纸之间，也被称为双层纸板。 C、Double Wall: Threesheets of linerboard with two mediums in between. 双瓦楞纸板：二层芯纸夹在三层面纸之间。（在中国又被称为五层瓦楞纸板） D、Triple Wall: Four sheets of linerboard with three mediums in between. 三瓦楞纸板：三层芯纸夹在四层面纸之间。（在中国又被称为7层瓦楞纸板） Flutes 楞形 Architects have known for thousands of years that an arch （拱） with the proper curve （曲线） is the strongest way to span a given space （跨越一个给定的空间）. The inventors of corrugated fiberboard applied this same principle to paper when they put arches in the corrugated medium（瓦楞芯纸）. These arches are known as flutes （楞）and when anchored to the linerboard with adhesive, they resist bending and pressure from all directions. When a piece of combined board is placed on its end, the arches form rigid columns, capable of supporting a great deal of weight. When pressure is applied to the side of the board, the space in between the flutes acts as a cushion（垫子） to protect the container's contents. The flutes also serve as an insulator (绝缘体, 绝热器,保温层）, providing some product protection from sudden temperature changes. At the same time, the vertical linerboard provides even more strength and protects the flutes from damage. Flutes come in several standard shapes or flute profiles (A, B, C, E, F, etc.). A-flute （A楞）was the first to be developed. B-flute was the next and is much smaller than A-flute. C-flute followed and is between A and B in size. It is also the most common large flute profile. E-flute is smaller than B and F-flute is smaller yet. Due to variances in flute sizes between manufacturers, FBA no longer publishes flute guidelines. In addition to these five most common profiles, new flute profiles—both larger and smaller than those listed here—are being created for more specialized boards. Generally, larger flute profiles deliver greater vertical compression strength （垂直压力）and cushioning, while smaller profiles provide better resistance to process and printing crush. Different flute profiles can be combined in one piece of combined board. For instance, in a triple wall board, one layer of medium might be A-flute while the other two layers might be C-flute. Mixing flute profiles in this way allows designers to manipulate the compression strength, cushioning strength （减震强度、缓冲强度） and total thickness of the combined board 本文来源：https://www.wddqw.com/doc/520ecb58fd00bed5b9f3f90f76c66137ef064f46.html