Boxshop is a Corrugated Box distributor located in Toronto Ontario. We supply corrugated boxes and packing supplies primarily for residential and commercial applications; however, we also welcome orders for any need.
We have included this section to help you select the proper style and type of box to meet your packaging and shipping needs.
Boxshop sell’s only durable, well constructed boxes, in single, double and single walled, each stamped with a Box Certificate detailing information about it, such as, Edge Crush Test, Size Limit and Gross Weight. Many companies sell inferior boxes without the Box Certificate which cannot stand up to the rigors of moving , packing and storage which quickly fall apart upon usage.
Edge Crush Test
The edge crush test is a laboratory test method that is used to measure the cross-direction crushing of a sample of corrugated board. It gives information on the ability of a particular board construction to resist crushing.
– The limitation of the box in terms of dimensions.
– The total amount of weight the box can withstand.
The strength of a corrugated box starts with its material. A corrugated sheet consists of two major components – linerboard and medium. 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 flute, when anchored to the linerboards with a starched-based adhesive, resists bending and pressure from all directions. When placed vertically on its ends, the flutes form vertical columns, capable of supporting considerable amounts of weight.
Flutes come in five basic heights and shapes – the most common are “B-Flute”(used for die-cut boxes) and “C-Flute (used for RSCs). B-flute is compressed and appears thinner, but don’t be fooled. It is made with more paper to provide stronger side wall protection from blows and punctures. C-flute is taller, with more air space, but offers enhanced stacking strength. For excellent graphic reproduction, consider E-flute.
The amount of virgin pulp fibers and the length of those fibers in a corrugated sheet substantially contribute to box strength. For example, the difference between a 200# test box and a 275# test box is that the latter has more pulp fibers in its corrugated linerboard. The 200# test box is rated to hold up to 65 lbs. of box and contents while the 275# box can hold up to 95 lbs. A 350# test box is rated to hold up to 120 lbs. of box and contents. The following chart shows Bursting Test and Edge Crush Test performance standards of corrugated box liners based on the combined weight of a box and its contents.
The “Manufacturer’s Joint” is where the two ends of the side panels meet to form the box. At that point, the panels are fastened together with tape, staples or glue. This description applies to regular slotted shipping cartons (RSCs). The side panel thickness and content weight determine the type of seal used for the manufacturer’s joint. For example, glue is used for most single wall boxes, but staples are found in some double wall and in most triple wall boxes. In contrast, die-cut boxes are one-piece panels scored and folded together. They do not have a manufacturer’s joint.
When to use a single wall 200# test box – when the box and contents weigh less than 65 lbs. This weight limit works fine for multiple light-weight items in a box or for a masterpack box where individual boxes are packed tightly in organized rows and stacks. If a single heavy item is to be shipped in a single wall, 200# test box, we recommend a weight limit of 45 lbs. or an upgrade to a 275# test single wall box. Simply apply common sense and always err on the conservative side.
With our knowledgeable and friendly staff, we are here to help our valued customers with their packaging needs. Our prompt, friendly service and commitment to customer satisfaction is what has kept Boxshop a leader in the Corrugated Box industry for so many years.
Call 416 424-4691 for more information.