Corrugated Sheets: Types, Grades, Flutes
Own production of corrugated sheets forms the basis for production of corrugated packaging.
Gofra Manufacturing Group LLC offers:
- Single wall corrugated board, flutes «В», «С», «Е»
- Double wall corrugated board, flutes «СB», «СЕ»
- Grades Т-22-27, П-32-35
Corrugated board is characterized by presence of a corrugated or fluted layer. Alternating flat liners are glued to fluted medium with different adhesives along the contact area of the top and bottom of crinkles and liners.
The main characteristics of flute types are thickness (h) and pitch (t). The flute thickness is the distance between its top and bottom. The flute pitch is the distance between two tops of the adjacent flutes. The combination of these characteristics (thickness and pitch) determines the flute type
Characteristics of flutes manufactured at Gofra Manufacturing Group LLC are shown in the table below
Number of flutes per meter of
|E ||1,1 - 1,6 mm ||3,2 - 3,6 mm ||295 - 315 |
|B ||2,2 - 3,2 mm ||4,5 - 6,5 mm ||160 - 222 |
|C ||3,2 - 4,5 mm ||6,5 - 8 mm ||125 - 155 |
Main purposes of flutes in single wall corrugated sheets
C flute corrugated board is designed for production of boxes and containers for transportation and storage of goods (high stacking strength).
B flute corrugated board is designed for production of boxes, containers and trays for transportation and storage of goods (low stacking strength, good printing surface).
E flute corrugated board is designed for production of small size packaging (low stacking strength, good printing surface).
Main purposes of flutes in double wall corrugated sheets
CB flute corrugated board пis designed for production of boxes and containers for heavy articles requiring high protection (high stacking strength, high impact strength).
CE flute corrugated board is designed for production of boxes and containers for heavy articles requiring high protection (high stacking strength, high impact strength, good printing surface).
Corrugated types and grades
The corrugated board grades are determined by national standards.
Corrugated board is multi-layer material and its thickness is determined by a number of liners and flutings.
Т – one wall corrugated board consists оf two liners and one fluting.
П – double wall corrugated board consists of three liners (two top-liners and one intermediate liner) and two flutings.
Main purpose of single wall corrugated board Grades Т22 - Т27, is use in containers and other packing media for packing of goods not subject to static loads.
Main purpose of double wall corrugated board, Grades П-32-34, is use in transportation packaging for goods requiring higher protection against mechanical damage and impacts and in corrugated packaging for large size articles; Grade П-35, is use in heavy duty and large size rigid packaging and containers.