First, corrugated paper type of paper
Divided into two kinds of face paper and corrugated paper. This is based on their position at the break in the corrugated board structure. The same type of paper, if used to make corrugated or core backing paper, is called corrugated or core paper.
Second, cardboard and corrugated paper manufacturing methods and uses
Third, the classification of linerboard and corrugated paper
Cardboard paper: according to GB13024-91 standard points A, B, C, D, E five levels. A is set to the highest level, E is set to the lowest level, and its performance parameters and indicators are different at each level.
The main technical indicators are: 1, quantitative (unit: g/m2) 2, tightness (unit: g/cm3) 3, folding degree (unit: times) 4, bursting degree (unit: KPa) 5, water absorption Sex (Unit: g/m2) 6, Moisture (Unit: %) 7, Ring Pressure Strength (Unit: N·m2/g)
Corrugated paper: According to GB13023-91 standard points A, B, C, D four levels.
The main technical indicators are: 1, quantitative (unit: g/m2) 2, tightness (unit: g/cm3) 3, bursting degree (unit: KPa) 4, tensile strength (unit: N) 5, ring pressure Strength (Unit: N·m2/g)
Fourth, corrugated paper performance requirements
1, high-speed fit
In recent years, the production of corrugated paperboards has become faster and faster, so the high-speed fit of corrugated paperboards has become increasingly important. In order to withstand high-speed fit, corrugated base paper, especially corrugated paper, must be strong and soft.
2, uniformity
When the machine is made into a corrugated box, if some of the strength is low, the weight will concentrate on this weak part, and the overall strength of the corrugated box will be reduced. The uniformity is mainly due to the uneven thickness and uneven moisture of the paper. Two kinds.
3, strength
The strength of cardboard is manifested by its unique structural form, that is, maintaining certain problems between the surface and the corrugated paper in order to show the strength it deserves. From a material mechanics point of view, it is required that the section of the cardboard must have a large "free-range", and if the CMT is too low, the spacing between the two sheets cannot be maintained. This is because even if the strength of the face paper is high, the manufactured corrugated cardboard will not be improved, so the corrugated paper must have a high strength (CMT).
4, appearance
Mainly paper should not have stains, cracks, holes, spots, uneven color, fiber arrangement is not smooth, there are spots.
5, crack
In addition to the quality of printing paper itself, temperature, humidity, atmospheric environment, and improper use can cause cracks. If the paper is too hard and the paper is too bad, cracks or breakage can occur. Dry winter packaging corrugated cardboard is prone to cracking or breaking.
6, uniform moisture
Corrugated paper has uniform moisture content, and its importance is the same as that of facial paper. However, because it is lighter and thinner than facial paper, the forming and bonding of the corrugated fiber must be completed at a high production rate, and therefore the moisture content needs to be more uniform.
7, molding performance
The corrugated paper forming process needs to satisfy various complicated conditions, but the decisive condition is to be able to form accurately, and the corrugation is not easily deformed. Usually people call it to run adaptive.
8, easy to bond
Corrugated paper bonding process is a very important process for corrugated paper production. In particular, the bonding process between single-faced corrugated paper and face paper should be completed quickly and with a 1/200 second instant on a high-speed corrugating machine. In such a short time, it is necessary to ensure that corrugated paper is firmly bonded and its shape is unchanged. This is corrugated paper. The first condition that must be met.
