Index : A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 中文版


The highest flute size, with 34 /-2 flutes to the foot. Makes the most of corrugated's cushioning and stacking properties for fragile and delicate items. It offers excellent stiffness qualities and short column crush resistance.

  Basis Weight
The weight in pounds or grammes of a ream (500 sheets in U.S.A.) of paper cut to its basic size (20 x 26 inches). The standard size is weight in grams per square meter.

Has lower arch heights than A and more flutes per foot (50). The medium contacts and supports the liners at a greater number of points thus providing a stiff, flat surface for high quality printing and die cutting and with excellent crush resistant properties.

  Box Makers Certificate (BMC)
A statement printed on a corrugated fiberboard box or a solid fiberboard box testifying that all applicable container board requirements of the carriers have been observed. It identifies and locates the box maker.

This is a measure of the percentage of light reflected by containerboard or paper. It is compared to the amount reflected by a known standard which has a brightness of 100. Improved (higher) brightness is normally desirable in producing containers with visual appeal.

  Bursting Strength
The strength of a material expressed in pounds per square inch as measured by the Mullen tester.

C-Flute has 40 /-2 flutes per foot, offers good cushioning, stacking and printing properties. By far the most widely used flute size.

The thickness of a sheet of linerboard, corrugating medium or corrugated board expressed in terms of thousandths of an inch. A "point" of caliper is one-thousandth of an inch.

  Cobb Test
See Water Absorption Resistance.

  Concora Crush
The compressive force expressed in pounds required to crush a fluted 112" by 6" specimen of corrugating medium. It is directly related to the flat crush of corrugated board.

A collective term used to describe its two components: linerboard and corrugating medium.

  Corrugated Board
Corrugated Board is produced by guiding a paper web, the corrugating medium or fluting, through a slit between two corrugated rolls and pressing it into a waveform through a combination of pressure and heat. In the same machine, an even paper web (facing or liner) is then glued on to this corrugated paper on one or both sides.

  Corrugating Medium
Paperboard used in forming the fluted portion of the corrugated board.

  Cross Direction
The direction of a sheet of paper in perpendicular to the direction of the flow on the paper machine.

  Double Wall Corrugated
Two corrugated medium with a linerboard facing adhered between them and to both sides. This 5-ply construction is most applicable for packing heavy items where high rigidity and protection is required.

E-Flute has the greatest number of flutes per foot at 93 /-5, which gives it the greatest crush resistance and the flattest surface for high quality printing applications. The thin board profile of E-Flute reduces box size and saves storage space. Often substitute for conventional folding cartons or solid fiber containers.

  Edge Crush Test (ECT)
ECT is the edgewise compressive strength, parallel to the flutes of a short column of corrugated fiberboard.

F-Flute, the newest flute, is a little more than half the thickness of E-Flute and is the newest growth segment in the corrugated industry. The idea is to make packages with lower fibre content.

  Flat Crush
A measure of the resistance of the flutes in corrugated board to a crushing force applied perpendicular to the surface of the board. Test results are in pounds per square inch.

  High Performance Liners
These liners offer stacking strength that is superior to conventional liners. It usually has higher ring crush values than standard materials of the same basis weight and they also have tighter specifications for moisture content, caliper profile and sheet formation.

  Kraft Liner
Produced from unbleached sulphate pulp primarily for the manufacture of corrugated board. The required physical properties include ring crush, tensile strength and smoothness. Typical grammage range 125g/m2 -350g/m2 (Metric)

  Machine Direction
The direction of a sheet of paper corresponds with the direction of the flow on the paper machine.

  Mullen Test
Bursting test for corrugated packaging. However attention is turning away from basis weights and bursting strength to a measurement of packaging performance called ECT.

A measure of the time in seconds required to pass 100 cubic centimeters of air through a square inch of container board. It does affect, to some extent, glue ability and print ability of linerboard.

  Puncture Test
The strength of material expressed in inch ounces per inch of tear as measured.

  Ring Crush
This test is used to measure the edgewise compression strength of linerboard or corrugating medium. The results are reported in pounds of force required to crush the 67" specimen.

  Single Face Sheet
A corrugating medium with a linerboard facing adhered to one side. It can be manufactured in sheets or rolls. Single face is principally used as a wrapping material and occasionally for interior packing or padding.

  Single Wall Corrugated (double face corrugated board)
A corrugating medium with a linerboard facing adhered to both sides. This popular and versatile 3-ply construction is converted into a wide variety of containers and packaging components.

The process by which gelatin rosin, starch or other synthetic substance is added on the surface of or in the paper to provide resistance to the absorption of moisture or eliminating ink feathering and bleed through.

A measure of the variability of the surface finish of paper on linerboard. Values ranging from 0-400, with lower numbers indicate a smoother surface.

A test instrument and method used to measure the short-span, edgewise compressive strength of linerboard or corrugating medium.

  Tearing Resistance
A measure of the force required to tear a sheet of containerboard. This property is important in boxes requiring resistance to rough handling abuse.

  Triple Wall Corrugated
Three corrugated medium and four linerboard facings. This 7-ply construction is used where large container sizes are involved, such as pallet packs.

Warp is deviation from the original or true plane of the surface. Excessive warp may cause crushing of the corrugating medium during automated printing.

Water Absorption Resistance Also called "Cobb Test".
The quantity of water absorbed by or through the outside liner of corrugated board in a specified time is an indicator of water resistance.


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