First, the flute shape of corrugated board
The core part of corrugated board is the corrugated, so the shape, type and combination of the corrugated have a great influence on the characteristics of corrugated board. Here are the basic points of corrugated flute shape.
1, the type of flute
Corrugated paper is characterized by the structure of the corrugated flute is pressed into the corrugated corrugated. The flute is the main body of corrugated paper. Corrugated board is made using face and core papers of the same texture, and if the shape of the corrugation is different, the corrugated board has different properties.
Now, the corrugated paper used in countries all over the world has several types of flute***: A flute, B flute, C flute, E flute
The uses of these four types of flute can be summarized as follows: for outer packaging - A, B, C flute, and inner packaging - B, E flute, and inner packaging - B, E flute. -B, E type flute For small packages - E type flute
First of all, let's talk about the characteristics of A, B, C type flute for outer packaging.
1) A-type flute
A-type flute is characterized by a small number of corrugations per unit length, and the highest corrugation. Corrugated boxes made with A flute are suitable for packing lighter items with greater cushioning.
2) B-type flute
B-type flute and A-type flute is just the opposite, the number of corrugated flutes per unit length and the lowest corrugated, its performance is also the opposite of the A-type flute, the use of B-type flute made of corrugated cardboard boxes, suitable for packaging heavier and harder items, mostly used for cans and bottles, such as the packaging of goods.
In addition, there is a tendency to use the B-type flute hard and unbreakable characteristics, after punching and cutting to make a complex shape of the combination box.
3) C-type flute
The number of corrugations per unit length and the flute height of C-type flute are between A-type flute and B-type flute. The performance is close to that of A-type flute. In recent years, with the rise of storage and transportation costs, the smaller volume of C-type flute has been emphasized, and has now become the flute type used in Europe and the United States.
Second, talk about the characteristics of E-type corrugated for inner packaging and small packaging.
4) E-type flute
E-type flute has a flute count of about 95 flutes in a length of 30 cm, and a flute height of about 1.1㎜ (the height of E-type flute of our company is 1.7㎜). Compared with A, B, and C-type flute used for packaging, it has the characteristics of being thinner and tougher. Therefore, the main purpose of developing E flute is to make it into folding cartons to increase cushioning. The corrugated carton made of E flute has a beautiful appearance, smooth surface, and can be printed in a more complex way, so it is usually used for decorative corrugated cartons.
The above four types of flute are shown in the chart below
Type of flute Height of flute (㎜) 30㎝
Standard number of flute
Type A 4.5-4.8 34±2
Type B 2.5-2.8 50±2
Type C 3.5-3.8 40±2
Type E about 1.1 93±5
II.
Second, the types of corrugated cardboard
The types of corrugated cardboard depend on the combination of various flute types. The different combination, the physical properties of corrugated cardboard are also different.
Usually, corrugated cardboard can be categorized according to its structure or use.
Single-sided corrugated board
Double-sided corrugated board (three-layer single corrugated board)
According to the structure of the classification Double-core double-sided corrugated board (five-layer double corrugated board)
Three-core double-core corrugated board (seven-layer triple-corrugated board)
Corrugated board for inner packages
According to the use of the classification
Outer packages of corrugated board
Corrugated board for outer packages.
The so-called classification according to the structure, the same is said to be based on the use of several core paper and face paper and classification.
First, single-sided corrugated board
Single-sided corrugated board, as shown in the figure above, is in the wave shape of the core paper side of the pasted paper, and its name is based on the number of sheets of paper used in the definition of single-sided corrugated board is generally not directly used to make corrugated boxes, but rolled into a cylinder or cut into a certain size, as a buffer material and fixed material to use.
Second, double-sided corrugated cardboard (three-layer corrugated cardboard) commonly known as single corrugated
Double-sided corrugated cardboard, as shown in the figure, is in the waveform tile paper on both sides of the paste to the face paper and made. The flute type can be A, B, C, E, which can be used. At present, the world's most used in the production of cardboard boxes is double-sided corrugated cardboard.
Third, double-tile double-sided corrugated cardboard (five layers of corrugated cardboard) commonly known as double corrugated
Double-tile double-sided corrugated cardboard is the use of two layers of corrugated cardboard with a face made of paper, that is, by a piece of single-sided corrugated cardboard and a piece of double-sided corrugated cardboard pasted together and become. In terms of structure, it can be used in a variety of flute combinations, so its performance is also different. Because it is ordinary double-sided corrugated cardboard thick, so its performance in all aspects are stronger than double-sided corrugated cardboard (three layers of corrugated cardboard), especially vertical compressive strength, there is a significant increase in the corrugated cardboard boxes made of double-core double-sided corrugated cardboard (five layers of corrugated cardboard), mostly used for perishable items, heavy items, and long-term preservation of the goods (such as fresh vegetables and fruits and other items that contain more moisture) of the packaging.
Fourth, three-tile double-sided corrugated cardboard (seven-layer corrugated) commonly known as three corrugated
Three core double-sided (seven-layer) corrugated cardboard is the use of three layers of corrugated cardboard made of waveforms, that is, in a single corrugated paper and then affixed to a single double-tile double-sided corrugated paper made of corrugated cardboard. As with double-tile double-sided (three-ply) corrugated board, various combinations of flute shapes A, B, C and E can be used. Structurally, this use of three flute combinations into the corrugated cardboard, than the use of two flute combinations into the double-tile double-sided (three-layer) corrugated cardboard to be strong, therefore, with this three-tile double-sided corrugated cardboard corrugated cardboard made of corrugated cartons, mostly used to pack heavy items to replace the past wooden boxes, and this carton is not limited to the use of a separate box is often a combination of wood pallets and trailing boards. The combination of the two is secured with steel straps or specialized box nails.
Features:
1, protect the environment, low cost.
Enhanced sandwich corrugated board and its production of packaging products all materials are corrugated paper and boxboard, and thus more widely realized the paper instead of wood, paper instead of plastic, reducing the use of wood, can not be degraded light foam, is conducive to the ecological balance and environmental protection; at the same time, the enhanced sandwich corrugated board and its products have the ordinary corrugated cardboard can be recycled and regenerated, lightweight, printing, folding, good cushioning performance. At the same time, reinforced sandwich corrugated cardboard and its products have the advantages of recyclable ordinary corrugated cardboard, light weight, printable, foldable, good cushioning performance and low cost.
2. Reasonable structure, super high strength.
Reasonable structure makes the reinforced sandwich corrugated board has a high strength, the test determined that the total thickness of the cardboard is 3.2cm (thickness can be adjusted arbitrarily), the density of the corrugated sandwich is 38-40 flute/m, {HotTag}the surface layer is five layers (quantitative 780g/m2) of ordinary corrugated board (C flute B flute), the liner is three layers (quantitative 470g/m2) of ordinary corrugated board (C flute B flute), the liner is three layers (quantitative 470g/m2) of ordinary corrugated board (C flute B flute). m2) ordinary corrugated board (C flute), the sandwich layer is three layers (quantitative 680g/m2) ordinary corrugated board (B flute) total paper quantitative 1900-2000g/m2.
(1) Side compression strength>7350N/m2
(2) Flat compression strength>129,850N/m2
(3) Breaking strength (to be measured)
(4) Bending strength (to be measured)
(5) Dynamic cushioning (to be measured)
Compared with ordinary five-layer corrugated cardboard, a number of physical indexes exceeded the ordinary corrugated cardboard by several times or even a dozen times.
Compared with the same amount of honeycomb cardboard, reinforced sandwich corrugated board has better comprehensive indexes.
3. Improve the efficiency, easy to disassemble.
It is easy to connect with ordinary corrugated board (3-layer, 5-layer, 7-layer) to make packaging containers for various purposes. For example: (1) the use of "reinforced sandwich corrugated board" for the cabinet air conditioner indoor unit made of top and bottom rocking lid box, due to the compact structure (now composed of seven pieces to two pieces), can reduce the direct packaging costs of 10-15%, reduce the indirect packaging costs of 20-30% (packaging efficiency, packaging labor, the number of transports, storage costs, (packing efficiency, packing labor, transportation quantity, storage cost, sealing tape, packing bag, etc.). At the same time, due to the front side of the no nails seamless, improve the overall container and the degree of aesthetics.
(2) the use of reinforced sandwich corrugated cardboard for air-conditioning outdoor units, refrigerators, color TVs, motorcycles and electromechanical products designed and produced by the bottom of the pin bottom tray type of packaging boxes, bottom load-bearing up to 200kg. the box's most important feature is the use of the "tile in tile" cardboard interlayer for the corrugated gap, the use of the pins (pins can be wood, bamboo, plastic or paper tube). The biggest feature of the box is the use of "tile in tile" cardboard interlayer for corrugated gap using pins (pin material can be wood, bamboo, plastic or paper tube) and bottomless cover box connected to one, greatly facilitating the process of loading and unloading of heavy items, especially color TVs, color TVs below the 34-inch general packaging are used in the ordinary parcel carton, the sales process must be lifted from the box to show the display debugging to the user to see after looking at the box to be lifted into the box, in the process of both troublesome and insecure, extremely inconvenient.
(3) The use of enhanced sandwich corrugated cardboard because of its good flat pressure and bending strength, if connected with the paper tube made of legged bracket can completely replace the wooden bracket, and can be by the forklift or trailer loading items.
(4) the use of enhanced sandwich corrugated cardboard good edge compression strength, as well as the face of the paper five-layer cardboard structure can be used to slot the insertion method, or the use of five-layer cardboard easy to press the line to turn the characteristics of the support plate made of planar and right-angled, if the face of the cardboard for the two-layer (corrugated to the outside), then the anti-vibration cushioning performance is even more ideal.
4. Low technical difficulty and low investment in equipment.
Because of the "enhanced sandwich corrugated board" from the ordinary corrugated cardboard trigger cardboard, its main material is ordinary corrugated cardboard, so it is very suitable for the production of corrugated packaging enterprises to produce.
Honeycomb board
2.1.Material
Honeycomb board face paper for the boxboard, there are also useful yarn tube paper, core paper for corrugated paper (special requirements can also be used boxboard), face paper and core paper bonding the use of No. 4 adhesive in the middle of the core paper, the five layers of the core paper between the bonding of the use of starch adhesive, and the last core paper to use the No. 3 adhesive.
2.2 Dimensions
The thickness of honeycomb paperboard commonly used specifications: 12mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm. can also be made according to the need to make other thickness specifications, but taking into account the generality of the design of the design of the best to use the above common thickness.
The width of honeycomb board depends on the boxboard used, usually 970mm, 1000mm, 1050mm, 1100mm, 1150mm, 1200mm, 1250mm, 1300mm, 1360mm, adjusted according to the inventory of each company. There are two kinds of corrugated board widths used, 1600mm and 1450mm. because of the limitations of the paper frame, the diameter of the paper tube is less than 1200mm.
The length of the honeycomb paperboard is unlimited, in order to facilitate the production is generally around 1800mm, too long is not easy for workers to pick up, easy to bend and fold in stacking, and too short is to increase the number of processing knives, which reduces the efficiency.
2.3 Flat compression performance
Honeycomb paperboard is most commonly used and the most significant is the high strength of the flat compression, theoretically, a square meter of 100KPa flat compression strength of honeycomb paperboard can withstand the static load of 10 tons. The compressive strength of the finished honeycomb paperboard produced by the company is generally about 110KPa, and the compressive strength of the rough board is 160KPa. (Different regions, take the middle value).
Another physical performance indicator for the longitudinal pressure, that is, the honeycomb paperboard standing, in the direction of the 100 × thickness of the force of its unit area can withstand the pressure. The size of the longitudinal pressure and the thickness of the face paper and the distance between the face paper (i.e., the thickness of the honeycomb paperboard) has a great relationship, the thicker the face paper is the stronger the longitudinal pressure. Once placed vertically on the 2 +1 composite honeycomb foot pier experiments, bearing capacity of more than 1300kg above.
2.4 Bending Performance
The theoretical bending model of honeycomb paperboard: face paper to withstand all the bending force, the honeycomb core paper to withstand bending shear. Generally can be thought of as: the thicker the face paper, the greater the edge compression strength, the stronger the bending capacity of the honeycomb paperboard, with the core paper aperture size, material has nothing to do. The production of pallets also need enough stacking, so the core paper weight also need to be guaranteed.