The last aspect of corrugated cardboard that can affect its performance (as well as its weight and cost) is the type of flute. Less than truck shipping, corrugated containers weigh more than shipping by uniform pallet loads in trucks or intermodal containers. Boxes sometimes need to be built more heavily to meet the requirements of the distribution system. Before we get into the technical details, it`s worth highlighting how corrugated board is formed (if you want a complete overview of cardboard production, please click here). The flute is the «wavy» section between the two linings, and by changing their pitch (and therefore the size of the flutes), it is possible to obtain different performance characteristics. Ordinary shipping containers require printouts and labels to identify content, provide legal and regulatory information, and barcodes for routing. Boxes used for marketing, merchandising, and POS often have high graphics to communicate content. Some boxes are designed to display content on the shelf, known as «Retail Ready Packaging». Others should help distribute the content. Popular for their strength, durability, lightness, recyclability and economy, corrugated boxes are used to ship a variety of items.
Due to the quality and safety of packaging items in corrugated cardboard boxes, they are widely used in the food industry. The boxes handle the pressure that comes with stacking, making them ideal for easy transport. [4] The shipment of dangerous goods or dangerous goods is strictly regulated. Based on the UN recommendations for the transport of dangerous goods, each country coordinated the design and performance requirements for maritime transport. In the United States, for example, the Department of Transportation is responsible for and publishes the requirements of Title 49 of the Code of Federal Regulations. Corrugated boxes are described in the 4G requirements. Performance (strict drop test, etc.) must be certified for the box and contents. The corrugated medium is often 0.026 pounds per square foot (130 grams per square meter) of base weight in the United States; In the UK, a flat paper of 90 grams per square meter (0.018 lb/square foot) is common.
On the single-facer, it is heated, moistened and formed on the gears in a fluted pattern. This is connected to a flat liner with a starch-based adhesive to form a single surface plate. On the double back, a second flat liner is glued to single-walled corrugated cardboard on the other side of the fluted support. Liners are testliners (recycled paper) or kraft cardboard (of various qualities). The lining can be bleached white, speckled with white, colored or pre-printed. Crush – An edge compression test that measures the transverse crushing of corrugated cardboard. It provides information on the crash resistance of a board of directors. Virgo – A material that has not been processed in a form other than its original manufacture. Improved fluting – A replacement of the standard corrugation that gives strength and performance to the material A more recent development that is popular in use is a hybrid product with the structural advantages of corrugated cardboard combined with the highly graphic printing of lithography, which was previously limited to cardboard folding boxes. This application, commonly referred to as «single-sided laminates,» begins its process as a traditional fluted medium that adheres to a single (single-sided) lining panel, but instead of a second long-fiber coating, a pre-printed sheet of cardboard such as SBS (solid bleached sulfate) is laminated on the outside. The plate can then be transformed into any desired shape using the same processes used for other corrugated cardboard productions.
The exterior shutters completely overlap, and the interior shutters, characteristic of all the special styles of the center, meet in the middle when closed. The way the crates are loaded onto the pallets has a strong impact on stacking. Vertical columns offer the best box performance, while box locking models significantly reduce performance. The interaction of crates and pallets is also important. This style of corrugated cardboard creates a flat, uninterrupted floor with a single piece of corrugated cardboard. The extended flaps are scratched in such a way that they bend and form sides for the box. A set of flaps meets in the middle to form the top of the box. All this information allows you to create an abbreviation that describes the type of card used.
Just like the Full Overlap Slotted Container (FOL), the damping and stacking potential of this type of corrugated cardboard is increased by the three complete layers of corrugated cardboard on the entire upper and lower part. A limitation of the usual corrugated cardboard material was the difficulty of applying fine print for information and marketing purposes. The reasons for this are the fact that prefabricated corrugated sheets are relatively thick and spongy compared to the thin and incompressible nature of solid fiber paper such as cardboard. Due to these properties of corrugated cardboard, it was mainly printed using a flexographic printing process, which is by nature an approximate application with loose recording properties. In the classic corrugator, the paper is softened with steam at high pressure. After the formation of the board, it is dried in the so-called dry end. Here, the newly formed corrugated cardboard is heated from the bottom by hot plates. On top, various pressures are exerted on the belt by a charging system. The inner flaps meet in the middle, just like in the CSSC mentioned above, and provide a beautiful flat base.
However, the length of this box style should not exceed twice the width. Depending on the length/width ratio, this leads to external flaps, which overlap to varying degrees until they completely overlap. How a box is locked is an important aspect of the design. It is influenced by the types of equipment available for production lines, performance measured in the laboratory, field performance and the ability of end users to open the box easily and safely. A box manufacturer certificate (also known as a «box certificate» or «box manufacturer certificate») is a seal printed on an outer surface, usually the bottom of the box, that contains information about the strength of the box. The certificate is not required, but when used, it implies compliance with the regulations regarding the certificate. [7] Important information includes:[8][9] If you only know how a corrugated board is made and what components it contains, you won`t necessarily be able to make an informed decision about what kind of material you should use for your packaging. This terminology is easily understandable (or at least should be) by virtually any packaging manufacturer and also allows you to fully understand the type of material your cartons are made from. Weight – refers to the density of a material, see GSM for more information. Corrugated board design is the process of balancing corrugated board design factors with physical, processing and end-use functional requirements.
Packaging engineers work to meet the performance requirements of a box while controlling the overall cost of ownership throughout the system. However, there are typical performance guidelines for the different grades of corrugated board that are frequently cited. With a thickness of 6 mm to 7 mm, this double-walled material combines both B and C shafts. This results in good overall performance, so it is common to manufacture shipping boxes that offer a higher level of transit protection. The boxes can be formed in the same system as the corrugator. These plants are called «integrated plants». Part of the notation and cutting is done online on the corrugator. Alternatively, corrugated cardboard can be sent to another production site for cardboard production; These are sometimes called «foliage» or «converters». Therefore, the following information provides a little more detail about each of the most commonly used types of flute.
It offers good overall performance in all types of packaging. I hope this guide has provided answers to any questions you may have had about corrugated varieties. Retailers often require goods to be delivered to them in shipping containers, allowing for easy storage full of suitcases. The goal is to place the suitcase directly on the shelves and storage places without having to handle the packaging or primary packaging individually. Retailers often require products to be delivered in ready-to-use packaging in order to reduce warehousing costs and reduce labor costs. Several models of special boxes are available. [10] [11] [12] [13] [14] [15] [16] Skilled workers prepare order documents for each stack of blank cartons and transport the blanks to the production machines. Printing shapes and patterns are prepared on large, flexible sheets, made of rubber or tin. They are loaded onto rolls and the box blanks are passed through them, where each is cut, printed, cut, scratched, folded and glued to form a box. The finished cartons are then stacked and sent to a bandage machine to be packed and shipped.
[4] Many packaging engineers find it beneficial to regularly inspect warehouses and visit customers` parcel acceptance processes. If problems are observed or documented, a new design and testing cycle may be warranted. The flute itself is usually made from a waste-based ripple (WBF – i.e. a fully recycled material) or a semi-chemical wave formation (SC).