Once the joints are sealed, the box is considered rigid. The Mullen Test, which has been used for many years, tests the bursting strength of corrugated board – how much pressure is required to rupture the wall of a piece of corrugated material. (9 mm). When pressure is applied to the side of the board, the space in between the flutes acts as a cushion to protect the container's contents. On average, the 275# Burst Test rated single wall carton will weigh 175 pounds per 1000 square feet of material used. Flutes come in several basic designations. Corrugated fiberboard or "combined board" has two main components: the liner and the medium. 125# 23 ECT 20 lbs.150# 26 ECT 35 lbs.175# 29 ECT 50 lbs.200# 32 ECT 65 lbs.275# 44 ECT 95 lbs.350# 55 ECT 120 lbs. A newer standard that has achieved widespread acceptance is the Edge Crush Test (ECT). We are open and continuing to support businesses during these unprecedented times.... © 2020 Hanchett Paper Company. May be further defined as a box blank, a box part, a tray or wrap, a partition piece, or an inner packing piece. The box is usually closed with staples driven through the overlap area. Corrugated Liner Grades - English stocks a wide selection of popular boxes, shipping materials and more! Flaps are used to form the joints. Both are made of a special kind of heavy paper called containerboard. This translates into fewer raw materials, lower energy requirements, and reduced pollution, in all stages of the package’s life cycle. Both are made of a special kind of heavy paper called containerboard. Boxes can be used to ship everything from apples to washing machines. Fluting comes in various types and each type is unique. The Edge Crush Test measures the amount of force (lbs. They are frequently used as inner containers for parts, delicate produce or mail pieces. The two outer flaps are one-half the container’s width in order to meet at the center of the box when folded. Corrugated Box Types. There are four common types: Corrugator: The machine that unwinds two or more continuous sheets of containerboard from rolls, presses flutes into the sheet(s) of corrugating medium, applies adhesive to the tips of the flutes and affixes the sheet(s) of linerboard to form corrugated board. They can be used to separate or cushion products, to strengthen the box or to fill voids. Linerboard is the flat, outer surface that adheres to the medium. Box Manufacturer's Certificate (BMC): A statement printed in a round or rectangular design on a corrugated box flap that certifies the box conforms to all applicable standards, and identifies its manufacturer. The length is always the longer dimension, and the width is always the shortest dimension, measured along the opening of the box. Tests the bursting strength of corrugated board –how much pressure is required to rupture the wall of a piece of corrugated material, Stronger box and better printable surface, The higher the number, the stronger the corrugated box, Developed in the 1990′s, measures the stacking strength of corrugated board –how much top to bottom pressure a box can withstand before crushing, 32ECT boxes have become extremely popular since the Edge Crush Test was introduced, partly due to cost, and partly because stacking strength is a more meaningful measure of how a box will perform in the field. Palletizing: Securing and loading containers on pallets for shipment as a single unit load, typically for handling by mechanical equipment. Uses include backing sheets for padded writing paper, partitions within boxes and the center ply or plies of solid fiberboard. Over 15,000 related products in stock. Slot: A wide cut, or pair of closely spaced parallel cuts including removal of a narrow strip of material made in a fiberboard sheet, usually to form flaps and permit folding without bulges caused by the thickness of the material. Dimensions: The three measurements of a box: length, width and depth. For most general purpose applications, 200# Test and 32ECT are interchangeable; however, the board comprising 200# Test material is slightly heavier than the 32ECT equivalent, making it somewhat more expensive. Self-Erecting Boxes typically feature regular slotted container or telescope-style tops. Full overlap Slotted Container (FOL) — All flaps have the same length (the width of the box). Flute: The wavy layer of corrugated medium that is glued between the flat inner and outer sheets of linerboard to create corrugated board. Liner Outer - Paper used for the outside of the corrugated board Liner Inner - Paper used for the inside of the corrugated board Mottled - A paper liner with an off white appearance Single face - One piece of fluting glued to one liner only Single wall - A board combination comprising of: liner/flute/liner When determining the basis weight from combined board, the take-up factor of the corrugated medium, which varies with flute size, and the weight of the adhesive must be considered. "Telescope Style" generally describes a box where the cover extends over at least two-thirds of the depth of the bottom piece, where a Box with Cover indicates a box where the cover extends less than two-thirds of the depth. Point: Term used to describe the thickness or caliper of paperboard, where one point equals one thousandth of an inch. Wrap-around Blank: A scored and slotted sheet of corrugated fiberboard that is formed into a box by folding it around its contents. There is a good deal of variance across the industry in the range of flute sizes based upon the container characteristics that are desired for each application, as well.