Corrugated medium paper is a critical component in the production of corrugated cardboard, which is widely used for packaging materials. The specification of corrugated medium paper can vary depending on the specific requirements of a packaging application and the manufacturer's equipment. However, here are some common specifications and characteristics associated with corrugated medium paper:
1.Basis Weight:
-Typically measured in grams per square meter (gsm) or pounds per thousand square feet (M weight).
-Common basis weights for corrugated medium paper range from 90 gsm (30 lb M weight) to 140 gsm (50 lb M weight).
2.Flute Type:
-Corrugated medium paper comes in various flute profiles, with common options being A, B, C, E, and F flutes.
-Each flute type offers different levels of strength and cushioning for packaging.
3.Stiffness:
-Corrugated medium paper needs to have a certain level of stiffness to provide structural integrity to corrugated cardboard.
-The stiffness is determined by the paper's thickness, fiber composition, and formation.
4.Burst Strength:
-Burst strength measures the ability of the paper to withstand pressure or force.
-It is typically tested using the Mullen Burst Test and is expressed in pounds per square inch (psi).
5.Moisture Resistance:
-Corrugated medium paper is often treated or coated to improve its resistance to moisture, which is crucial for protecting packaged products during transit and storage.
6.Color:
-Corrugated medium paper is usually brown or tan, but it can be white or other colors depending on the desired appearance.
7.Fiber Composition:
-Typically made from virgin or recycled paper fibers, sometimes with a blend of both.
-The choice of fiber source can impact the strength and environmental sustainability of the paper.
8.Caliper:
-Caliper refers to the thickness of the paper and is usually measured in thousandths of an inch (mils) or millimeters (mm).
9.Smoothness:
-The surface finish of the paper can vary, with smoother surfaces often being preferred for high-quality printing applications.
10.Roll or Sheet Dimensions:
-Corrugated medium paper is often supplied in rolls or sheets with various dimensions to suit the needs of the packaging industry.
It's important to note that corrugated medium paper is just one part of the corrugated cardboard production process. It is combined with linerboard (outer layers) to create corrugated cardboard, which is then used to make various types of packaging materials like boxes and cartons.
The specific requirements for corrugated medium paper can vary depending on the intended use, and manufacturers may provide custom solutions to meet specific needs.