These grooves and ridges, also known as flutes, provide anisotropic strength to a box. The raw material that is used in the manufacture of corrugated fiberboards has a tendency to absorb water and retain it. In other words, every square foot of the final corrugated material must contain at least the minimum amount of base paper material required by the standard for its Burst Test rating.
test material means it will withstand 200 pounds of pressure per square inch as measured by the Mullen tester. Custom packaging is the key to protected products, a strong brand identity, and a close connection with customers. dimensional weight. It would be equivalent to a carton with an ECT of 32 or higher, and the bursting test is more of a true measure of rough handling. In this type of test, the corrugated board is immersed in water while exposing the glue lines to check for bond strength and water absorption. A minimum of $1000 per order required. These include rotary abrasion testers and even manual wiping. These measurements always relate to the inside dimensions of the box. For certain applications, the FEFCO 9 standard is used to test the water-resistance of the gluing of the corrugated cardboard boxes. carriers will also measure any bulges or flaps that are not completely closed. costs in general, but the savings are especially acute when dimensional weight pricing is applicable. Hence, knowing the type of corrugation is important before you make a decision. We are ready to partner with you to provide the right packaging solutions to reduce and optimize your package sizes. Whether you run a business or work in a warehouse, having the proper shipping equipment is necessary. In this test, corrugated fiberboard is first subjected to water. The corrugated box testing standards for puncture resistance include FEFCO 5 or ISO 3036. On average, the 275# Burst Test rated single wall carton will weigh 175 pounds per 1000 square feet of material used. Regular slotted containers, for example, are one of the most widely used types of boxes for shipping and storage. -Thick-and-Durable-Flat-Corrugated-5-Ply-Box-Carton.jpg)
First impressions matter. significantly increase the cost of doing business. Thank you! The length and width are the opening dimensions of the box, and the length is always the larger of the two (unless they are equal).
With three production facilities, a dedicated corrugation plant and five private The formula used for this calculation is to measure the exterior of the box used, multiply the length times the width times the height, and then divide the result by 166. 41% were seeing increases of 10-20%. These tend to provide better protection against damage from external forces (such as dropping, kicking or punctures) than boxes with an equivalent ECT rating. 
Learn how integration of technology in supply chain impacts your business. Ukraine-Russia War: Combating The Increase In Raw Material Prices, make an informed decision when picking boxes, Chemical Analysis in Corrugated Box Testing. It's also a canvas that enables you to show off your brand's charm. Each makeup will vary slightly in overall strength. 
During shipping, they may be at the bottom of a heavy pallet or stacked among boxes of different weights and sizes on a delivery truck. For this purpose, scuff resistance or rub proof tests are employed. 833-726-8376 Mullen Burst Test standards dictate a minimum board weight for the corrugated material.
Providing for optimum end usage packaging support, these boxes can also be custom developed involving different paper types, GSM and design choices as specified by the customers. In the Edge Crush test, force is applied to one side of the box, perpendicular to the ridges, until the box gets crushed.
Or, the Box Compression Test helps determine stacking strength thats especially important when shipping and transportation. A 350# test box is rated to hold up to 120 lbs. Linerboard is the flat paper that covers both sides of the sheet and the medium is the fluted or arched paper found between both liners. The 200# test box is rated to hold up to 65 lbs. Take time to find the perfect box. The strength of a corrugated box starts with its material. It is important to understand what type of corrugated you are using before deciding to substitute any equivalent.
They may be thrown about or subject to sudden forces that can puncture or rupture their sides. One of the most popular methods to test the stacking strength of corrugated boxes is the Edge Crush Test or ECT. Modern shipping and warehousing methods mean that most products are now shipped and stored in pallets, where boxes may be stacked several layers deep. This means that ECT-rated boxes are generally lighter and use less material than a Mullen-Tested box that is considered to be equivalent. This is an initial recommendation. Digital Production Planning and visibility, End-to-End Tech-Based Procure-to-Pay Solutions. Burst Test results are given in pounds per square inch. Both carriers base their That is to say, they vary a lot in terms of compressive strength, thickness, chemical resistance, and other factors. Most boxes carry a Box Makers Certificate stamp that lists specifications and box strength. If you are stacking and palletizing your cartons, ECT provides a better measure of how well they will hold up in a stack. But how do you store them properly? F: 570.929.1845, 16461 Elliott Parkway This is a true performance test and is directly related to the stacking strength of a carton. Thats because corrugated boxes are pretty popular. Even though the fiberboard itself can absorb and retain water, testing the water-resistance of gluing or sealing is also important. To understand stacking strength, you need to look at Edge Crush Test (ECT) ratings. Thin boards with dense flutes have a high grammage. The Cobb Sizing tester is used to the degree to which water is absorbed. Of those we surveyed, 83% indicated that dimensional weight pricing will impact at least 25% of their customers freight costs. This is measured in pounds per lineal inch of load bearing edge (lb/in), but usually reported as an ECT value (for example, 44 ECT). of box and contents.
When estimating your freight, use the greater of the box actual weight or dimensional weight. The difference in weight because of the retained water is known as the Cobb value. Printing is an integral part of packaging. Alternative corrugated box testing methods are also available to test resistance to abrasion. 32 ECT is the most commonly used corrugated material. Bursting factor = Bursting strength (kg/cm2) x 1000/Grammage (gm/m2). This will not matter if your primary concern is stacking and palletizing, but can make a big difference if your box is handled roughly during delivery. Every side of a corrugated box is made up of sheets that have three or more layers. Investing in Kyana Packaging Solutions will lead to lower shipping The compressive strength of a corrugated box can also be calculated using the McKee formula where the Edge Crush Test (ECT), Caliper or corrugated board thickness (CBT) and box perimeter (P) values are taken into account. Unlike Mullen Test ratings, ECT ratings do not require a minimum amount of base paper in the corrugated material. ECT gives you an accurate idea of a boxs strength when they are stacked and shipped by pallets. recommended box size. Shippers must also account for the bulge: If the package is over packed or misshaped (out of square), the carriers will use the longest dimensions that their scanners will see. In May of 2015, we surveyed 150+ customers like you and found that 89% were already seeing an increase in shipping prices due to dimensional weight policy. The Burst (or Mullen) Test has long been considered an industry standard. Some estimates indicate that dimensional weight pricing could increase shipping charges by $550 million annually beginning in 2015. The results of the test indicate the box's ability to contain and protect its contents during rough handling. To determine how corrugated boxes hold up against external influences so as to help you make an informed decision when picking boxes manufacturers use multiple testing procedures. Thicker ones are more sturdy and appropriate for heavy-duty shipping. per inch). On the other hand, an excessive box means you pay extra for material and add to environmental wastage. When in doubt as to which box to use, always select the Mullen Test box because the construction of the linerboard cannot be altered.
However, not all boxes are made equal. Puncture resistance tests how well the box can handle the impact made with a pyramid or triangularly shaped weight. 2245 Industrial Drive The diaphragm is expanded using hydraulics and as the diaphragm expands, the corrugated board bursts under pressure. As per FICCI, cardboard products make up more than 30% of the packaging industry. C-flute is taller, with more air space, but offers enhanced stacking strength. Mullen Test vs. ECT: which rating should you use when selecting material for your corrugated boxes? In this testing procedure, a rubber diaphragm is used to apply pressure to the walls of the corrugated box until it bursts. Testing may be required to validate these results. A way to be sure that the material of the box that youre purchasing meets industry standards is to look for the Manufacturers Certification Stamp, usually printed on one of the bottom flaps of the box.
The analysis of the fiberboard involves microscopic examination of the board to see what types of paper are used to make the fiberboard. Learn how right-size packaging and efficient materials can ensure items arrive safely without incurring undue cost. Packaging is more than just a protective encasement for your products. If the box design makes use of inner supports, such as wood support or corrugated board cushioning, then such factors are also taken into account. This test is crucial to check the strength of boxes and is required by most industries transporting boxes in bulk. Corrugated cartons are low cost, durable, and eco-friendly. Also, an ECT rated corrugated box uses less material than its equivalent Burst Test rated box, to provide an equivalent level of strength. Moreover, the moisture content, as well as the pH of the board, is also determined. Scuff Resistance test is especially important for pharmaceutical or medical industries where label legibility is of prime importance. The flute, when anchored to the linerboards with a starched-based adhesive, resists bending and pressure from all directions. This is because corrugators may use one of many different recipes to make each type of corrugated. For example differing formulas for a 200# single wall corrugated will cause the equivalent ECT board to vary between 32 ECT and 44 ECT. Thickness is usually measured in (millimetres) mm and grammage is expressed in terms of grams per square meter (g/m2). As per the McKee formula: Compression Strength = 5.874 * ECT * CBT0.508 * P0.492. Your submission has been received! (Void Fill, Bubble, Foam, Paper). It measures the force required to burst or rupture the face of a corrugated board. It does not measure how much weight can be stacked on top of the carton. There are currently two tests used throughout the corrugated industry to determine strength. We measure the bursting strength in Kilograms per square centimetre. Learn about more ways to optimise corrugated box procurement from experts-, By signing up, you are indicating that you have read and agree to Bizongo's Terms & Conditions, Expert insights, industry trends & everything else around packaging, textiles, apparels and other customised goods. It can save you a lot of costs and lower material wastage. Usually, the type of flute (A, B, C, E, or F) determines the cardboard strength with C being the most common (4.0mm). While there are charts that show conversions between Mullen Test and ECT ratings, it is important to remember that the tests are not equivalent. UPS is also raising rates, with a 4.9% average increase for Freight (effective October 26, 2015), a 4.9% average increase for Ground (effective December 28, 2015), and a 5.2% Digital platforms to maximize vendor performance. In other words the ECT rated carton will use less corrugated material. There is no best grammage or thickness mentioned in corrugated boxes specifications and it is completely based on your requirements. For example, the ECT value lets you calculate the amount of weight a package can carry.
Thinner boards are easier to fold, lighter, and more suitable when it comes to printing or detailing. Usually, depending on the quality, all of the water is not removed in spite of the board being pressed by a heavy steel roller.
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