Deconstructing Watton Paper
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The name of the corrugated paper originated because of its structure resembling the tiles used in Chinese architecture, and the paper layer is all-hearted, so it is called Waton paper, and later it was translated into a cartoon board by English Carton Board. But the most correct is to use the "Corrugated Board" which is pit paper.
Pit paper structure
The basic structure of the pit paper is a smooth kraft paper and wavy paper (collectively called paper heart). In the past, most of the kraft paper content was even wood pulp, about 200 to 250 gsm thick, and the resistance to breakage and support was extremely high. Strong, but in the past 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 much thinner than before, usually 120 to 160 gsm, and the thickness of 200 gsm is also used. . As for the paper heart, it is all recycled from waste paper, and its thickness is changed from 130 to 160 gsm to 100 to 140 gsm.
Type of pit pattern
The most important use of pit paper is in outer packaging. Due to the development of printing technology, pit paper also has a variety of styles. Today, it is not just a role in the outer packaging, but also in the inner packaging or paper products. It looks the same first, but it turns out that there are different pit patterns. The pit pattern is only A-shaped in the early stage, and its supporting force is high, but it has more materials. Therefore, B and C shapes are developed under different requirements. The B-shaped corrugation wave amplitude is narrow, the wave is short, and the supporting force is fine, but Less material used. The C-shaped pit pattern is as wide as the A shape, but shorter than the B shape, so the C-pit paper is thinner than the A and B pit paper. E pit was popular more than ten years ago. There were F pits a few years ago. In recent years, there have been more G pits (there are existing A, B, C, E, F, and G pits, but there are no D pits). The box is not purely designed to protect the product, it is also used for decoration, publicity and other roles. The difference between E, F and G pits is that the pit pattern is finer and has no protection and is not rough. For some cases, it is necessary to reduce the cost in the case of smashing the gray card on the pit paper. For example, the fine pit pattern and the thinner gray card are not easy to show pits, which can reduce the cost. It is now more common in the packaging of high-end consumer goods such as cosmetics and mobile phones.
Type of pit paper
As for what is a single pit, a double pit and a three pit, it is necessary to start from the basics:
The easiest thing is to see the pit, that is, a piece of kraft paper and a piece of paper heart together. When finished, the paper is kraft paper, and the back of the paper is clearly visible. It is suitable for inner packaging and is used to separate a single piece of goods or accessories. Although it is rough in shape, it has low cost and high efficiency, for example, for packaging bulbs, glassware, and the like.
Single Wall is mostly used inside and outside with 120gsm kraft paper and about 105gsm in the middle. The paper heart is usually B-pit, which is suitable for general packaging.
As the name implies, Double Wall has two layers of pit paper added together, that is, the outermost two layers and the middle are kraft paper, and the second and fourth layers separated by a sandwich cake are paper hearts, and the two layers of paper The heart usually uses different pit patterns, one layer uses C pits and the other layer is B pits. This is also beneficial for cost and utility. Many packages of goods are also packaged in double-pile paper for transport purposes. As mentioned above, the thickness of kraft paper and paper core is usually sufficient to cope with the general transportation conditions of modern social environments, such as air transport or container loading. Transportation, etc.
As for the Triple Wall, it is like a double pit. It is a combination of three layers of pit paper, that is, the outermost two layers, the third and fifth layers are kraft paper, and the second, fourth and sixth layers are paper hearts. Most of the kraft paper is 120gsm, with 105gsm paper heart. Suitable for extremely expensive, fragile or easy to break items. However, the three-pit box is cumbersome, expensive, and low-flexibility. Some people use a double-pit box to add a double-pitch paper to the top and bottom of the box to enhance the top force when placing the goods. Some people use two double-pits to wrap valuable and fragile items instead of three-hole boxes.
Choose the pit box experience
When to consider the use of single pits, double pits or three pits, of course, safety is the most important consideration, followed by cost. The structure of the pit paper must withstand the requirements of Burst Strength, Supporting Strength, Ring Crush and Edge Wise Supporting Strength. Foreign companies often have clear views on this aspect. Requirements guidelines. The company that makes the pit box must first test the pit paper. If the paper meets the requirements, the cutting and box structure should be tested again. For example, the straight pit pattern is usually used, and the size of each plane on the carton should not be too large. Great. Generally, the upper limit of the weight of the pit box is 25 to 30 kgs, and each plane area of the carton should also be kept within a certain size. In addition, it is also necessary to pay attention to whether the pit box is in a humid environment, and the bearing capacity after the moisture is absorbed can still cope with the boat, the shock, the lifting, the heavy pressure and the like. For the above reasons, paper pits are not suitable for pre-production and storage. Furthermore, measuring the size of the standard rope to order the pit box, in addition to the cost of use, easy to package, and therefore can prevent the item from shaking in the box, if the goods are constantly shaking during the attachment, it generates unnecessary support force. The top force will increase the load on the pit and the danger is extremely high. In foreign countries, courses such as Paper Physcis and Paper Engineering are extremely 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 weight and area considerations in transportation, and has the strong protection, but also balance the burden of shipping. Therefore, some cases have to match the capacity (volume) of the container, and some have to meet the restrictions of the air transport company. Nowadays, the variety of pit paper, the change of printing technology, the matching of processing, and the improvement of transportation conditions make the inner and outer packagings one. Some products are packaged in a single-use package so that they can be placed directly on the shelves of the supermarket. Therefore, this is both an inner package and an outer package. In addition to protection and convenient transportation, it needs to be promoted and eye-catching, such as beer. 24 Into a box, the carton is printed with a beautiful promotional pattern, which can be placed directly on the shelves of the supermarket, and can be placed in the storefront of bars and other nightclubs for publicity. This practice is now widespread and popular, as it not only reduces packaging costs, but also reduces the cost of manpower and meets environmental requirements.
Pit paper is an important material for packaging and printing, and even becomes the best partner for high-end consumer goods. In addition to the continuous improvement of paper structure, its printing technology and processing methods are also an important part. Next time, you can come to a package to deconstruct and learn from each other.