Deconstructing tile paper

The name of corrugated paper originates from the fact that its structure resembles that used in Chinese architecture, and the paper is traversed, so it is called corrugated paper and later translated into a cartoon board in English carton board. But the correct thing is to use "corrugated board," which is pit paper.

Structure of pit paper

The basic structure of the pit paper is a smooth kraft paper and corrugated paper (collectively referred to as the paper core). The previous kraft paper content is mostly or completely wood pulp, and is approximately 200 to 250 gsm thick. The breaking strength and bearing force are extremely high. Strong, but in the last two or three decades, due to environmental protection and cost factors, the wood pulp content in kraft paper is reduced and mixed with waste paper, and the thickness is also much thinner than before, usually 120 to 160 gsm, and there is also a 200 gsm thickness in use. . As for the paper core, it is entirely recycled paper. Its thickness has also been changed from the previous 130 to 160 gsm to 100 to 140 gsm.

Kind of pit pattern

The most important use of pit paper is the outer packaging. Due to the advanced printing technology, pit paper also has a variety of styles. Today, it is not just the role of packaging, but also packaging or paper products come in handy. It seems to be the same as the first, but they all have different pit patterns. The pit pattern is only a-shaped in the early stage, but its supporting force is high, but the material is more, so it develops b and c shapes under different requirements. The b-wave ripple amplitude is narrower, the wave ripple is shorter and the bearing capacity is smaller, but Less material used. The c-shaped pit pattern is similar to the a-shaped width, but shorter than b-shaped, so c pit paper is thinner than a, b pit paper. The e-crater became popular more than a decade ago. Some years ago there were pits f. In recent years, there were even more pits (pits existing a, b, c, e, f, g, but no d pits). The box is not designed to protect the product. It also serves as a decoration, propaganda, and other roles. The pits of e, f, and g differ from each other in that the pit pattern is finer, but there is protection and rough feeling. For some packaging boxes, it is possible to reduce the cost in the practice of refilling powdered grey cards on pit paper. For example, a thin pit pattern combined with a thin powdered gray card is also less prone to pitting, and the cost can be reduced. Now more common in cosmetics, mobile phones and other high-level consumer goods packaging.

Kind of pit paper

As to what is a single pit, double pit and three pits, we must start with the basics:

The simplest is to see the pit, that is, a piece of kraft paper and a piece of paper heart together, after the completion of the paper is kraft paper, the back of the paper clearly see the pit pattern. It is suitable for inner packaging and is used to separate single items or accessories. Although the form is rough, it has low cost and high efficiency. For example, it is used for packaging light bulbs, glassware and the like.

Single wall is mostly internal and external 120gsm kraft paper with a paper core of about 105gsm in the middle, and paper core is commonly used with b-pit, suitable for general packing boxes.

The double wall, as the name implies, has two layers of pit paper added together, namely, the outermost two layers and the middle is kraft paper. The second and fourth layers separated by a sandwich cake are paper cores, and the two layers of paper are The heart usually uses different pit patterns, one layer uses c pits, and the other layer is b pits. This also has benefits for cost and utility. Many packages of goods are also packaged in double-deck paper. As mentioned above, the thickness of kraft paper and paper cores are usually sufficient to meet the general conditions of transportation in modern society, such as by air or by entering the container as a waterway. Transportation etc.

As for the triple wall, it is like a double pit. It is a combination of three pit papers, that is, the outermost two layers and the third and fifth layers are kraft paper, and the second, fourth and sixth layers are paper cores. Kraft paper is mostly 120gsm, with a 105gsm paper core. Suitable for extremely valuable, fragile or easily bendable items. However, the three-hole box is relatively bulky, expensive, and has low flexibility. Some people use double-pit boxes. When placing goods, a double-decked paper is added to the upper and lower sides of the box to strengthen the jacking force. Some people use double double pit boxes to wrap precious, fragile items instead of three pit boxes.

Choose pit box experience

When considering whether to use single-pit, double-pit, or triple-pit, of course, safety is the most important consideration, followed by cost. The structure of pit paper must withstand the requirements of burst strength, supporting strength, ring crush and edge wise supporting strength. Foreign companies are often clear about this. Requirements guidelines. The company that makes the pit box must test the pit paper first. If the paper quality meets the requirements, the cutting and box structure must be tested. For example, the straight pit pattern is usually used, and the size of each plane on the carton is not too large. Great. In general, the maximum weight of pit box load is 25 to 30 kgs, and each plane area of ​​the cartons should also be kept within a certain size. In addition, we must also pay attention to whether the bearing capacity of the pit box can still cope with the fatigue, shock, lifting, pressure, etc. in the wet environment. Because of the above reasons, paper pit boxes are not suitable for large batches of pre-made and stored. In addition, measuring the dimensions of the guideline to customise the pit box, in addition to being cost-effective and easy to pack, can also prevent the article from shaking in the box. If the goods are constantly shaken during the delivery, it will generate unnecessary bearing force. , Top force, etc. will increase the load on the pit box, which is extremely dangerous. In foreign countries, courses such as paper physcis and paper engineering are very common, but Hong Kong does not have such a special course.

Controlling the cost of the pit box, freight is also an important part. The pit box has the weight and area considerations in the transportation, while there is a strong protection force, but also to balance the burden of shipping. Therefore, in some cases, it is necessary to match the capacity (volume) of the container, and some have to match the restrictions of the airline company. Now, because of the variety of pit papers, the change in printing technology, the cooperation in processing, and the improvement in transportation, the internal and external packaging can be combined into one. Some products can be put on the shelves of supermarkets directly after being packaged at one time, so this is both internal packaging and external packaging. In addition to being protected and facilitated, some products need to be advertised and have eye-catching effects, such as beer. 24 into a box, printed on the carton exquisite propaganda pattern, it can be put directly on the supermarket shelves, but also in bars and other nightclubs for the promotion of the use of shops. This practice is now widespread and popular because it not only reduces packaging costs, but also reduces the cost of manpower, and can also meet the requirements of environmental protection.
Pit paper is an important material for packaging and printing, and even becomes the best partner for high-end consumer goods. In addition to continuous improvement of the paper structure, its printing technology and processing methods are also an important part. Next time, a box can be deconstructed and learn from each other.