What are the layers of cardboard called?

What are the layers of cardboard called?

The paper layers on the outside are known as the liners, or linerboard, while the fluted or wave-shaped material in the middle layer is called corrugating medium. Corrugated board comes in different thicknesses, depending on the height of the flutes, and number of flutes per foot.

What are the lines in cardboard called?

Corrugated board is manufactured on large high-precision machinery lines called corrugators, usually running at about 500 feet per minute (150 m/min) or more.

How do you measure the strength of cardboard?

The Burst (or Mullen) Test has long been considered an industry standard. It measures the force required to burst or rupture the face of a corrugated board. The Mullen Test suspends a piece of corrugated material and uses a machine to apply increasing levels of force to the face of the material until it bursts.

What are the different grades of paper?

In addition to pulp, the “furnish” from which book papers are made contains various amounts of sizing, fillers, and dyes. Uncoated book paper comes in four finishes: (1) antique or eggshell, (2) machine finish, MF, (3) English finish, EF, and (4) supercalendered.

What type of cardboard is the strongest?

The strongest corrugated cardboard is triple wall corrugated cardboard, constructed with four sheets of carton board and three sheets of corrugated board. This cardboard is used to package large items such as refrigerators and treadmills.

How do you measure cardboard thickness?

If you’re looking for a general estimate, you can use a ruler and a stack of paper to measure and calculate the thickness. Since this isn’t very precise, try using a digital caliper on a single sheet instead. If a digital measurement isn’t an option, use a manual micrometer or caliper for more accuracy.

What is the GSM of cardboard?

105 GSM WBF – Most Common Flute Standard.

How is cardboard thickness measured?

Caliper: Thickness of the board measured as thousandths of an inch or points. Paperboard ranges in thickness from 10 to 40 points (thousandths). In Europe, board is measured in millimeters or micrometers. Basis Weight: The weight of the board per unit area—generally pounds per thousand square feet.

What does ECT mean in packaging?

Edge Crush Test
A newer standard that has achieved widespread acceptance is the Edge Crush Test (ECT). This is a true performance test and is directly related to the stacking strength of a carton. ECT is a measure of the edgewise compressive strength of corrugated board.

How do you define quality of paper?

Paper Quality Parameters – Traditional FineArt

  1. Raw Material Composition. The raw material composition determines to a large extent the quality of paper.
  2. Paper surface (appearance)
  3. Clarity, opacity and transparency.
  4. Sizing.
  5. Strength.
  6. Grammage and thickness.
  7. Grain.
  8. Ageing of paper.

What are the terms associated with corrugated board grades?

Technical Terms Associated with Corrugated Board Grades. This compressible material (usually pulp or news board) is usually adhered to the liner and provides a better finish (appearance), water resistance and extra strength. Blank – A flat piece of corrugated board that has been cut and scored ready to make a box.

What is a cardboard?

Jump to navigation Jump to search. Cardboard is a generic term for heavy-duty paper-based products having greater thickness and superior durability or other specific mechanical attributes to paper; such as foldability, rigidity and impact resistance.

What is the difference between blank board and board grade?

Blank – A flat piece of corrugated board that has been cut and scored ready to make a box. Board grade – A grade given to corrugated board based on three elements; firstly, the weight and type of outer liner, secondly the type of flute and thirdly the weight and type of inner liner.

What are the different types of paperboard?

Configurations of paperboard include: Containerboard, used in the production of corrugated fiberboard. Folding boxboard, comprising multiple layers of chemical and mechanical pulp. Solid bleached board, made purely from bleached chemical pulp and usually has a mineral or synthetic pigment.