Corrugated board is made from three components: a sheet of corrugated fluted paper, sandwiched between an outside liner and an inside liner. Each side of the fluting is glued to a sheet of flat liner paper (see diagram). These 3 paper are glued together during corrugating process.

Corrugated board is made from three components: a sheet of corrugated fluted paper, sandwiched between an outside liner and an inside liner. Each side of the fluting is glued to a sheet of flat liner paper (see diagram). These 3 paper are glued together during corrugating process.

Sheet Board.

The basic material for the production of corrugated board is paperboard.
There are two main types of paperboard: Kraft and Test.

Kraft Paper

Comes from softwood trees-the strongest form of paper and the best to print on. This is the most common outside liner for corrugated boxes.

Test Liner Paper

This is a so-called double layer paperboard (duplex paper) made from recycle paper. Most standard cartons use recycled paper for the fluting and the inside liner.
Each sheet of liner paper is commonly composed of two layers. The finer cover layer is ideal for printing and aesthetics, and the basic layer is excellent for adhesion and strength.

Fluting Paper

This is a paper made for fluting purpose , IT is also made from recycle paper.

Type of Corrugated Board.

Single Face Corrugated Board

E Flute  |  B Flute  |  A Flute

Single Wall Corrugated Board

B Flute  |  A Flute

Double Wall Corrugated Board

EB Flute  |  BA Flute