What is a carton flute?
Carton flute actually determines the waveform of the cardboard sheet. Pitch flutes are known in specific sizes. According to the standard, the steps of the flutes are divided into A, B, C, E, and F. A flute is the longest pitch, which actually has 36 congs in one foot. In other words, the pitch height of the flute is 1/4 inch. A flute is usually used in the industry to cover sensitive breakable containers. B flute is actually the second thickness of the cardboard sheet, the number of B flutes in one foot is 47. Usually, B flute is a combination flute that is combined with C flute and is used to produce 5-layer cartons. will be C flute has a thickness between B flute and A flute. This type of flute is the most used in food, pharmaceutical, construction, electronic and chemical industries. The number of flutes in C flute is 39. E flute has the lowest thickness in cartons in Iran for packaging and is usually used to produce food and medicine boxes. The number of E flutes in one foot is 90.
Group A (A Flute or Congress Type A)
Its tooth or congress is between 4.5 and 5 mm and the number of teeth is between 105 and 125 per meter. This tooth or Congress has the characteristics of impact and relatively higher compressive resistance due to its height and height, and it has more resistance.
Group B (Flute or Congress Type B)
The distinctive feature of this tooth or congress can be mentioned is its standing, firmness and endurance against pressure and crushing, which is a little weaker than flute A, which is long and its height is between 2.1 and 2.9 mm. The number of teeth is between 125 and 150 per meter.
Group C (Cullot or Congress Type C)
The height of these teeth is between 3.5 and 3.7 mm and the number of congresses is 120 to 145 per meter. The resistance of type C teeth is relatively normal and is lower than flute A and flute B
Group E (E Flute or Congress Type E)
This type of teeth and flutes have the greatest endurance and stability against crushing, and in terms of surface, it is smoother and more acceptable for printing and laminating. The height of these congresses is between 1.1 and 1.6 mm and their number is between 290 and 320 per meter. These types of flutes are mostly used for small cartons and elegance is important for the manufacturer.
Group F (Flute or Congress Type F)
It is the thinnest type of sheet in the carton industry, which is used very little compared to other flutes in this industry. It can be used to make all kinds of boxes such as spray, cologne, cosmetics, etc., with a height of 0.8 mm and a flute count of 420 per linear meter.
Why is flute used in carton making?
Each sheet has a unique flute that is produced to make different cartons and boxes. Types of carton flutes play a very important role in packaging.
According to architectural principles, a bow is the best bearer. There will be heavy pressures; This principle is not only related to architectural materials, but also applies to paper. Corrugated papers that are used in most packages are made on the same principle, in addition to strength, the empty space between the layers of these papers will create softness and preserve the product against hard and fragile pressures. Also, this empty space is considered a very good insulator for temperature.