Cardboard is very widely used in the packaging industry as well as the shipping and storage sector. Two of the main products that are made out of cardboard are the cardboard box and corrugated box. Cardboard is basically formed by several sheets of unbleached craft paper that is pleated and bonded with wood pulp and adhesives to form a strong structure that can withstand normal stresses of transportation because of its stiffness and durability.
Cardboard has outer and inside layers of flat sheets that can resist puncture up to a certain point. The central layer is made out of fluted, short fiber paper that not only provides cushioning, but can also resist small amounts of crushing force. The flutes are arranged vertically so that the cardboard boxes can be stacked on top of each other. The three layers are glued together with starch adhesives that are made from potato, corn or wheat.
Corrugated sheets of cardboard are made in heavy-duty machines called corrugators. Cardboard is fully eco-friendly as it is made from natural substances, is recyclable and biodegradable and does not harm the environment. Cardboard sheets can also be used as item dividers in packaging and they can be stapled together to make boxes. Cardboard boxes are often used to transport a variety of items such as delicate and fragile goods, white goods, medicines, toys, beer, and apparel, etc.
Cardboard is also known as corrugated paper and it originated in China during the 15th century. It wasn’t until several hundred years later that the first commercial cardboard box was created in England in 1817. Cardboard as a product was patented about 40 years later, also in England. The man made material was generally used for shipping containers and to wrap bottles and glass objects in for protection.
Cardboard is relatively strong, but you need to make sure that it is strong enough to carry the items you load into it as it can rip, especially when its wet. Paper that is made from hardwood is generally weak in tension and it tends to tear easily. Paper that is made from softwood has strong tension qualities and better resists puncturing and tearing. Cardboard can be printed on and it can also come in various colors.