Unit_7_-_Corrugated_Board - Unit 7 Corrugated Board...

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7. 1 Unit 7 Corrugated Board Corrugated board is the highest value sector of the entire packaging material industry. A sheet of corrugated board is assembled from 3 or more sheets of Kraft paperboard. The corrugated board manufacturing process is a converting activity. The subsequent step of manufacturing boxes, trays, or other products from the corrugated board is also a converting step. In this unit we will learn about the types corrugated board, how it is manufactured, and how it is used as a packaging material. 7.1 Brief History of Corrugated Board Corrugated board was first used in Victorian England. The tall hats worn by gentlemen at that time were stiffened by rolled sheets of flat paperboard. The hats were fragile and subject to damage. Corrugated paperboard, which replaced the flat paperboard, was stiffer and provided cushioning to prevent damage. The paper was corrugated in small hand cranked corrugators. Today, the material would be called "unfaced corrugated"; it is one sheet with “flutes”, which are the waves in the material. A later application of the unfaced corrugated board was to cushion glass bottles and similar fragile products. This application was given a US patent in 1871. Unfaced Corrugated As development proceeded, a second sheet of paper was glued to one side of the unfaced board. The second sheet was called a linerboard . The resulting product could not be stretched, but it could still be rolled around a fragile product to provide cushioning for protection against damage from dropping or rough handling. Today, this product is called “single -faced corrugated. Single-faced Corrugated In 1895, a continuous process was developed which added a second liner on the other side, making a “double - faced” or “ single wall corrugated board. This development made a stiff board which did not bend easily.
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7. 2 Double-faced Corrugated Other inventors developed systems of slots and scores to form the corrugated paperboard into cartons or boxes. The boxes were lighter and cheaper than wooden boxes. Wells Fargo conducted shipping tests and accepted the corrugated cartons as shipping containers in 1895. The range of sizes and capabilities of corrugated boxes continued to grow as the corrugated board manufacturers developed containers to fit the myriad of new products that were produced by other industry sectors, including refrigerators, radios, furniture, televisions, personal computers, and thousands of other items. Corrugated boxes were also adapted for use in wet conditions by coating with wax and plastic. This made corrugated suitable for use with vegetables, meat, poultry, and similar products. Corrugated Boxes 7.2 Corrugated Board Manufacturing Corrugated board is manufactured on an assembly of several machines called a “corrugator”, which costs more than $5 million.
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This note was uploaded on 10/17/2011 for the course PKG 101 taught by Professor Haroldhughes during the Spring '08 term at Michigan State University.

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Unit_7_-_Corrugated_Board - Unit 7 Corrugated Board...

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