Corrugated board was patented in England in 1856 and is made of paper with a grooved piece between two flat facing boards. It was originally used as a hatbox lining and later for shipping. The design was improved in 1874 and Robert Gair used it to form the corrugated box in the 1890s, replacing wooden crates at a lower price. Corrugated cardboard is made on large machines and can be produced in different colors and thicknesses for various needs.
Corrugated board was patented in England in 1856. It is made of paper and consists of a grooved piece of paper between two flat facing boards. This construction results in a thicker and more durable product that is used extensively for shipping.
This product is also called pleated paper and was originally used as a hatbox lining, designed to protect tall hats. A patent for use in ships was issued on December 20, 1871 to Albert Jones of New York City. It was commonly used to protect bottles and glass lantern chimneys during shipping.
Oliver Long made a significant change to the design and added lining sheets to both sides, creating the corrugated design still in use today. A machine for making this material was built in 1874 by G. Smyth. The combination of these two changes has significantly increased the demand and use of this new product.
Corrugated cardboard became a very important product when Robert Gair used it to form the corrugated box in the 1890s. This box was able to replace wooden crates and boxes at a lower price, without losing the ability to protect the product during shipping. This box design allowed products to be shipped without damage, greatly increasing the size of the export market.
This type of board is made on large corrugating machines capable of creating board at speeds of 500 linear feet per minute. To create corrugated cardboard, the paper is subjected to high-pressure steam, which softens the fibers. The fibers are bent to create the required groove thickness between the cardboard sheets.
Next, pressure is applied to the top and bottom of the cardboard to increase the strength of the material. Flat liner boards are brushed with an adhesive on one side and then corrugated board is sandwiched between the two layers of flat liner board. This material can be made in different colors, but is most commonly produced in brown, white, or mottled white.
The thickness of the groove can be changed to create different degrees of strength in the corrugated board. There are 5 standard thicknesses in the US, denoted by the letters A through F. The letter indicates when it was invented and not the relative size.
Inside the corrugated cardboard there are different types of construction, depending on the needs of the final product. Suppliers can create single wall, double wall, specific groove size, burst strength, edge crush resistance and more. Special surface treatments, coatings and coatings can also be provided.
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