Corrugated box testing parameters

Corrugated box testing parameters

Corrugated boxes and sheets are essential components of the packaging industry. Largely used in transportations, they should be strong enough to bear the external stress. To make them fit to use in different applications, corrugated fibre boxes undergo stringent testing process.

If the packer knows different properties of the CFBs, appropriate precautionary measures can be taken. Bursting strength test — As these boxes are meant to carry consignments of variable weights, their bursting strength is assessed prior selecting for packing. Bursting strength tester applies hydraulic or pneumatic pressure on the test sample. A round sample is clamped on the fixture and desired pressure to be applied is set using gauges.

Glycerin is used as a medium to create hydraulic pressure on the rubber diaphragm. As this diaphragm expands, it transfers equivalent pressure on the sample until it burst. The pressure applied to burst the sample is measured and displayed on the screen or gauge. Considering this, the bursting strength factor can be calculated.

corrugated box testing parameters

Edge crush test — A corrugated fibre sheet has a structure where a thin sheet having ridges and furrows are sandwiched between two linear boards. These ridges and furrows distribute the pressure equally throughout the surface thus preventing any damage. To assess the strength of this structure three tests is performed primarily on this corrugated structure.

Edge crush test, ring crush test, flat crush test. An edge crush tester with different fixtures can be used to perform all these tests.

It applies a force from the top on the sample placed in different positions. For edge crush test, the force is applied in axis to the direction of the ridges. In flat crush test, the force is applied on the top of ridges lied in the flat position.

In ring crush test, a ring is made out of the thin strip in which ridges are axis to the direction of force applied. Cobb sizing tester — The raw material used to make CFB is paper, that has a tendency to absorb water. Thus, it is significant to assess how much water the sample can absorb and retain. A Cobb sizing tester is used for this process, which is a simple assembly to clamp the test sample beneath the cylindrical stainless-steel cavity.

This cavity is filled with water when the sample is just beneath it. After some time, the sample is removed. It is pressed with heavy steel roller to remove excess water out of it. The difference in weight of the sample before and after the test is Cobb value of the CFB. For more information regarding bursting strength test, edge crush tester and Cobb sizing tester, drop a query. Get information about new product launches, research, innovation and endeavors at Presto.

Connect with us for your business enquiries. Generally we respond within one or two working days. Our Story Why Presto? Catalogue Get information about new product launches, research, innovation and endeavors at Presto. Need more information Connect with us for your business enquiries.Packaging protects your products from dynamic, static and climatic influences. There are international standards and norms which test packaging and packaging units.

By testing packing and packaging materials and packaging itself along with transport tests, we ensure that the requirements are complied with. To ensure the smooth storage and logistics of your products and by extension an adequate product protection, a range of packaging tests exist.

These cannot be recommended as standard, but are customised to the requirements and functionalities of each specific packaging unit. For example, during the storage of a corrugated cardboard packaging unit this can only absorb moisture to a certain extent. This water absorption influences the technical properties, the printability and the adhesion properties of cardboard. If the outer packaging layers are also stacked on top of each other, it is recommended that the stacking crush resistance be measured.

Influencing factors also include climate conditions, load-bearing products e. Requirements and functionalities stipulated in packaging planning are crucial determining factors when it comes to the necessary packaging tests. In order to be in a position to make realistic and standard-based statements, the packaging sector operates according to international standards and DIN norms. We have summarised a few laboratory services for you:.

One example of testing the resistance of packaging materials is the bursting strength of papers.

corrugated box testing parameters

Determining the bursting strength according to John W. Mullen is a typical toughness test and is used to determine strength parameters. Burst pressure is described as the resistance against which a paper sample opposes a unilateral, consistently increasing pressure until bursting. To determine a realistic value ten tests are carried out five times from the top side and five times from the wire side of the papers.

Two examples of packaging tests are the edge crush test and the drop test. The ECT value is one of the most meaningful tests for corrugated cardboard packaging.

It is specified in kilonewtons per metre.

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A drop test simulates the freefall of package on its corners, edges and surfaces. To achieve this the packaging is filled with the envisaged products and dropped from a defined height.

9 Corrugated Box Testing Methods to Ensure Packaging Quality

This enables realistic conditions encountered during shipment to be simulated. In addition to this vertical shock test, a horizontal test can also be performed, for example, to simulate braking processes and handling loads. The vertical vibration test in the transport test, for example, provides information on the transportation stresses on the packaging and on the product. The BCT value, on the other hand, measures packaging stability. In the test laboratory we determine the BCT value in a compression-tension testing machine or in a universal testing machine.

Climate conditions during transportation also affect your packaging. To simulate transport conditions we temper the test objects in climate-controlled chambers. Then you receive certified results in order to avoid damage to your products. Do you have any questions for Jacek Imbrzykowski or would you like further information?

Measurement of burst resistance for corrugated cardboard. Material Tests One example of testing the resistance of packaging materials is the bursting strength of papers. Measurement of edge crush resistance. Packaging Tests Two examples of packaging tests are the edge crush test and the drop test.AirSea Containers is a leading provider of the cardboard boxes that power shipping and commerce around the world, and we know how to make our boxes tough and durable.

First developed inthe Mullen Test or Burst Test was the default standard for cardboard strength until the mid th century. In this test, a piece of cardboard is placed in a hydraulic clamp device called a Mullen tester. The operator uses the device to apply increasing amounts of pressure to the cardboard, noting at which point it bursts or ruptures. This number of pounds is reported as the Mullen Test rating.

For example, a box made of cardboard that can withstand pounds of pressure is rated as The Mullen Test is generally considered to be more accurate for boxes that are subject to individual rough handling, including being stacked and re-stacked and taken on and off of hand trucks individually. However, because most goods are now shipped on pallets, the industry developed another test: The Edge Crush Test.

The Edge Crush Test is a more recent invention that has become a new industry standard for cardboard box testing. An ECT measures the pressure that a piece of cardboard can withstand when placed upright on its edge, mimicking the pressure that boxes experience when stacked on pallets. This test is the standard for boxes that will spend the majority of their time in pallet shipping.

Because pallet shipping is generally less rough on boxes than parcel shipping, boxes tested with an ECT can use less material to achieve the same loading capacities. Thus, if eco-friendly packaging is important to your mission, ECT-rated boxes can be a great option.

corrugated box testing parameters

ECT-rated boxes are generally the preferred option for pallet goods. Mullen boxes are often a better choice for boxes that will spend a long time in transit individually. AirSea Containers offers a corrugated box for every needand we have both Mullen-rated and ECT-rated models available. And for the ultimate custom corrugated solution, we offer custom cardboard shipping boxes both hazmat and non-hazmat at industry-leading prices and with great features like custom printing.

Still got questions? Talk to the packaging experts at AirSea Containers by calling or request a free quote today! Click here to cancel reply. Name required. Email will not be published required. Decide with Confidence.Corrugated box design is the process of matching design factors for corrugated fiberboard boxes with the functional physical, processing and end-use requirements.

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Packaging engineers work to meet the performance requirements of a box while controlling total costs throughout the system.

In addition to the structural design discussed in this article, printed bar codeslabelsand graphic design are also vital. Corrugated boxes are used frequently as shipping containers. Boxes need to contain the product from manufacturing through distribution to sale and sometimes end-use. Boxes provide some measure of product protection by themselves but often require inner components such as cushioningbracing and blocking to help protect fragile contents. The shipping hazards depend largely upon the particular logistics system being employed.

For example, boxes unitized into a unit load on a pallet do not encounter individual handling while boxes sorted and shipped through part of their distribution cycle as mixed loads or express carriers can receive severe shockskicks, and so forth. Ordinary shipping containers require printing and labels to identify the contents, provide legal and regulatory information, and bar codes for routing.

Boxes that are used for marketing, merchandising and point-of-sale often have high graphics to help communicate the contents. Some boxes are designed for the display of contents on the shelf known as "Retail Ready Packaging". Others are designed to help dispense the contents. Popular for their strength, durability, lightness, recyclability, and cost-effectiveness, corrugated boxes are used for the shipping of a variety of items.

Due to the quality and safety of packaging items in corrugated boxes, they are used widely in the food industry. The boxes handle the pressure that comes with stacking, making them ideal for easy transporting. Also, more elaborate and innovative box designs have emerged due to several reasons. Unboxing is one emerging trend that has challenged designers to create cool new ways of opening boxes and lively product displays within those boxes.

Another trend is the use of corrugated board for product displays. With the rigidity of corrugated board combined with the ability to print beautiful designs, corrugated board can be designed as a Point of Purchase display or "POP" display to showcase products in a fully branded display rather than the standard retail shelf. One of the important functions of a corrugated box is to provide crush resistance product protection and adequate strength for stacking in warehouses.

A box can be designed by optimizing the grade of corrugated board, box design, flute direction, and inner supports. Support from the product also provides "load sharing" and can be an important factor.

If long-term storage of corrugated boxes in high humidity is expected, extra strength and moisture resistance is called for. The method of loading boxes on pallets strongly affects stacking. Vertical columns provide the best box performance while interlocking patterns of boxes significantly reduce performance.

The interaction of the boxes and pallets is also important. Box compression testing is a means of evaluating boxes, stacks of boxes, and unit loads under controlled conditions. Field conditions of stacking and dynamic compression do not have the same degree of control.Regular slotted containersfor example, are one of the most widely used types of boxes for shipping and storage.

Corrugated cartons are low cost, durable, and eco-friendly. However, not all boxes are made equal. That is to say, they vary a lot in terms of compressive strength, thickness, chemical resistance, and other factors.

The cardboard strength and construction directly impact the amount of weight a box can carry. A box too weak might puncture or collapse.

On the other hand, an excessive box means you pay extra for material and add to environmental wastage. 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.

The Mullen Test or Bursting Strength Test checks the toughness of the walls of the corrugated board when subjected to force or pressure.

Packaging 101: The Corrugated Box

In this testing procedure, a rubber diaphragm is used to apply pressure to the walls of the corrugated box until it bursts. The diaphragm is expanded using hydraulics and as the diaphragm expands, the corrugated board bursts under pressure. We measure the bursting strength in Kilograms per square centimetre.

The Bursting factor is given as a thousand times the bursting strength, divided by the grammage of the board. Every side of a corrugated box is made up of sheets that have three or more layers. Generally, a thin sheet with grooves and ridges is sandwiched between two flat sheets. These grooves and ridges, also known as flutes, provide anisotropic strength to a box.

This means the boxes can bear a greater amount of force from one direction.

corrugated box testing parameters

Edge crush test, right test, or flat crush test helps determine this. In the Edge Crush test, force is applied to one side of the box, perpendicular to the ridges, until the box gets crushed. In the Ring Crush test, a ring cut out from the box is used to test the same.

While in the flat crush test, excessive force is applied on one side. The results of the Edge Crush test are measured in pounds per lineal inch of load-bearing edge but represented as ECT.

Reference: Standford University.The corrugated industry is acting in an environment where the requirements of customers are getting more and more strict and demanding.

The converting machines play a major role in obtaining the required quality level of the finished products. All actors of the supply chain e.

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The FEFCO GMP standard was launched at the end ofrenewed into ensure that corrugated boxes meet all the requirements of quality, safety and hygiene. Furthermore, such a transparent standard, adapted to the material, also respects all its specific qualities versatility, lightness, strength, recyclability.

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Implementing this GMP means having a total control system in place in each manufacturing plant. The purpose is to ensure that from the purchase of raw material through the delivery of the finished product to the customers' premises, all parameters of quality, hygiene and traceability are monitored.

Skip to main content. Acceptance Conditions and Procedure for Certifying Bodies. World Standard Comparison Chart. National Standards Comparison Chart.Secondary packaging is an important aspect of the successful delivery of the consignment. Thus, it is very important to create a sustainable packing for different conditions. Whether its cartons or wooden boxes, the packing must be tough to withstand environmental and physical conditions.

Corrugated boxes to determine its quality must fulfil required important factors.

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In order to get the best quality cartons, its raw material must be good. Also, it should comply with internal standards set as per research and developments. To make the carton strong, it must have sufficient compressive strength, which can be decided as per the intended application. Compression test is usually performed to judge the buckling load of the box. Perform error-free compression test for best quality packaging. Contact us for more details.

To determine the compression strength or buckling load of corrugated boxes, one of the best options is Compression Test. Compression test is world widely incorporated into the work process of different manufacturing units. The strength depends on the various factors of the box and they are. A lot of expertise and experience is required to choose the perfect material that can deliver accurate results.

To avoid deformation and failure of the boxes, the safety margins are often considered while choosing the raw materials. Due to incomplete knowledge or lack of expertise, sometimes manufacturers ignore this.

Thus, awareness regarding the compression test is very important. If the manufacturers don't have the theoretic knowledge, they can at least perform the test and get the values straightway. A carton is made up of CFB or corrugated fiberboard. It is made up of corrugators sandwiched in 2 linear boards.

Corrugated Boxes – Edge Crush Test (ECT)

The ridges and furrows decide the strength and stress absorbance capacity of the board. If the height of corrugators is more and density is less, its strength will decrease. On the other hand, if the density of the corrugators is more and height is less, the shock absorbance capacity is high.

This is an important parameter while choosing the raw material for making cartons. Various standards related to packaging have determined the correct box compression strength value for the corrugated boxes with the help of universal standard test method i. Box Compression Test. This test can be performed efficiently with the help of a high-quality Box Compression Tester.

The testing machine is used to measure the maximum force which is required to compress the boxes until it ruptures completely. The instrument is used to perform load compression testing of mono cartons, corrugated boxes, fiber boards, etc.

Get more technical details for Box Compression Tester, reach out to our experts. The Experimental data and fundamental research depict that, it is quite easy to determine the box compression performance of corrugated boxes with box compression testing. This value is also used to provide grades to different types of boxes. Hence, it is important to measure the compression strength of corrugated boxes to determine its quality in better and accurate manner.


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