Carton, carton type and design

Paper product packaging is the most used type of packaging industry products. Carton is the most important form of transport packaging, and cartons are widely used for sales and packaging of food, medicine, electronics and other products. With the change of transportation methods and changes in sales methods, the style of cartons and cartons has become increasingly diversified. Almost every new type of non-standard cartons has come with a set of automation equipment, and the innovative cartons themselves have also become The means of product promotion.

Classification of cartons and cartons

There are many types and types of cartons and cartons, and there are many ways to classify them.

Classification of cartons

The most common classification is based on the corrugated shape of the cardboard. There are four types of corrugated cardboard: A, B, C, and E.

In general, cartons used for outer packaging mainly use A, B, and C-type cardboard; medium-duty packaging uses B and E-type cardboard; and small-size packaging uses E-cardboard.

In the production and manufacture of corrugated cartons, it is common to differentiate by carton box type.

The box-type structure of corrugated boxes is commonly used internationally by the international carton box standards developed jointly by the European Federation of Corrugated Box Manufacturers (FEFCO) and the Swiss Board Association (ASSCO). This standard is approved internationally by the International Corrugated Board Association.

According to the international carton box type standard, the carton structure can be divided into two basic types and combination types.

The basic type is the basic box type. There are legends in the standard, which are generally represented by four digits. The first two indicate the type of box and the last two indicate the different types of boxes in the same box type. For example, 02 indicates a slotted carton; 03 indicates a slip-on carton. The combination type is a combination of basic types, that is, composed of two or more basic boxes, represented by multiple sets of four digits or codes. For example, the upper flap of a carton can be type 0204 and the lower flap is type 0215.

China's national standard GB6543-86 refers to the basic box type of single corrugated cardboard box and double corrugated cardboard box for transport packaging. The box type code is as follows.

However, in the late 1980s, with the changes in distribution channels and market sales forms, a number of non-standard corrugated boxes with novel structures emerged, and with the birth of each new structure, there is almost always a set of The corresponding automatic packaging system or packaging equipment came out, greatly enriched the carton application market.

These new types of non-standard cartons mainly include wrap-around cartons, separable cartons, triangular column cartons and large cartons.

Classification of cartons

Cartons are more complex and diverse than cartons. Although classification can be made according to the material and purpose of use and use, the most common method is to distinguish the method according to the processing method of the paper box. Generally divided into folded cartons and paste cartons.

Folding carton is a kind of sales package with the most extensive application and structural changes. It is generally divided into tubular folding carton, disc folding carton, tube disc folding carton, non-disc non-disc folding carton and so on.

Like the folding cartons, the paste cartons can be divided into three types: tubular, disc, and tray.

Each major type of carton can be subdivided into a number of subcategories according to the different local structures, and some functional structures can be added, such as combination, windowing, adding handles, and the like.

Carton design features

The international standard carton has formed a complete system and regulations, and the production enterprises only need to select materials and process according to the standard. The emergence of a variety of novel non-standard cartons fosters a revolution in the corrugated box industry.

Rolled carton

Wrap-up corrugated boxes are similar to the 0210-type ones. The difference is that the 0210 boxes are parallel to the width of the blank cardboard, and the wrap-around boxes are parallel to the length of the cardboard. The 0210 box joint is attached to the main box surface. The roll carton is attached to the side of the box; the inside and outside of the 0210 box are in line, and the wrap box is different.

In use, it is not like the 0210-type carton, in the carton factory to complete the entire process of boxing, to the user plant and then fill the contents of the box, but only the die-cut carton blank to the packaging user, After the user uses the automatic packaging machine to put the contents, it is wrapped into boxes.
Compared with the standard box, the wrap-around carton features less material, and the carton is tightly affixed to the contents, enabling high-speed automation.

Separate carton

Separating carton can be divided into two or more in the circulation process, mainly to solve the contradiction between mass production and small-batch sales.

Separating cartons can be combined on the basis of the traditional standard box type with a variety of accessories to the small box type, or it can adopt a new molding method.

The new split carton generally uses a combination of an H-type mid-separator and a wrap-around carton.

There are two kinds of N-type and F-type wrapping paper boxes. Among them, the F-type is more popular and is mainly used for shampoos and conditioners in plastic bottles as well as outer packagings for glass bottles of condiments.

The F-wrapped carton can be decomposed into 20 bottles of 10 bottles. The compressive strength of the package is also increased, the cost of packaging materials is reduced, and it has a good promotion function.

Triangle column carton

The triangular column type corrugated carton is formed by one page of the box and the gusset, and the four corners of the corrugated box form a triangular column or a right-angle column structure, thereby increasing the compressive strength by 20%-50%.

The triangular column carton has two types of trays and seals, and there are many types of boxes to choose from. Compared to general corrugated box, triangular column corrugated box can increase the compressive strength by 20%-30% under standard conditions, and increase by 40%-60% under high-humidity conditions; the box will not be convex and wet. This is especially obvious; from the structural point of view, the corner part is strong, so when the shock and vibration drop, the damage rate of the contents is extremely low; when the load is applied, the carton is deformed stably, and it is not easy to cause the pile to collapse; the sales of the tray type triangular column corrugated box Good display.

Folding carton design features

Folding cartons are generally made of folding-resistant paperboard with a thickness of 0.3-1.1mm. They can be folded and stacked for transportation and storage before being shipped. Both sides of the folding-resistant paperboard have enough long fibers to produce the necessary folding resistance and sufficient bending strength so that they will not crack along the indentation after folding.

The main varieties of folding paperboard are manila paperboard, white paperboard, boxboard, noodleboard, kraft paperboard, double-sided different-color paperboard, glass paperboard and coated cardboard.

The rigidity of a folded carton made of a paperboard less than 0.3 mm in thickness does not meet the requirements, and a board thicker than 1.1 mm is difficult to obtain a satisfactory indentation in a general folding carton processing apparatus.

When designing the folding carton, it is possible to select a suitable thickness of paperboard depending on the carton volume and the weight of the contents.

The main structure of the folding carton is mainly divided into several major categories such as tube type, disc type, tube type and non-tube type. In addition, the folding carton also includes a partial structure such as a box cover, a box bottom, a box surface, a box corner, etc., and has a lock, a self-locking, a partition, a window, a display board, and the like. However, folding cartons are often named according to a characteristic structure, and the characteristic structure may be a main structure or a partial structure, such as a self-locking bottom carton, a main body structure is a tube type, and a characteristic structure is a partial structure, namely a self-locking box bottom. It has its name. Another example is a disc self-folding carton, which has two characteristic structures. One is a partial structure in which the side walls of the box board can be folded flat automatically, and the other is that the main structure is a disc type.

Tube folding carton

Tube folding cartons are one of the main types of folding cartons. Its initial meaning refers to the box surface of the box cover of this kind of carton, which is the smallest area among many box surfaces, such as a toothpaste box and a film box. However, it is generally defined from the molding feature: It means that the box lid and the bottom of the box need to be folded and assembled to fix or seal the box during the carton forming process.

Different tubular folding cartons are mainly subdivided by the different structures of the lid and the bottom of the box. There are many kinds of lid structure, such as the plug-in lid has a re-sealing function, can be packaged household daily necessities, toys, pharmaceuticals, etc.; lock-type structure is the main swing wing lock or lock group inserted into the opposite wing lock Inside the hole, the feature is that the seal is relatively strong, but the opening is a bit inconvenient, similar to the plug-lock type; continuous flap wing type is a special form of the lock, can be composed of a beautifully shaped pattern by folding, decorative pole Strong, can be used for gift packaging, the disadvantage is that manual assembly is more troublesome; Adhesive sealing lid is to bond the four lids of the lid to each other. This kind of lid has better sealing performance, and it is suitable for high-speed full-automatic packaging machine, which is easy to open and has a wide range of applications. The positive-seal sealing structure is used to fold or curve the carton box body, using the strength and stiffness of the cardboard. , Underarm pressure wings to achieve sealing. Its characteristics are simple packaging operation, saving cardboard, and can design a lot of unique shape of the carton, but only limited to small and lightweight goods; in addition to swing cover type and anti-illegal opening type and so on.

Similar to the lid, there are many types of bottom lids. However, if the structure of the bottom of the box is too complex, it will affect the efficiency of the automatic loader and packaging machine, and manual assembly will take time. Therefore, for the folding carton, the design principle of the bottom of the box is to ensure Strength, but also strive for simplicity. The common box bottoms are mainly socket-type, continuous-flame-sweep-type, lock-bottom-type, automatic-lock-type, partition-type, partition-type, adhesive-sealed-type, and front-back-type.

Folding carton

The tray folding carton consists of a sheet of paper folded around at right angles or bevels into a main box type. Sometimes it is locked or glued at corners. If necessary, a body of this box type can be extended to make up the lid. . Unlike a tubular folding carton, this type of carton has almost no structural change on the bottom of the box, and the main structural change is in the position of the box. The tray folding carton is mainly used for packing shoes, caps, clothing, food and gifts.

The disc type folding carton is generally assembled from a plurality of locking structures or is formed by dividing the edge plates connecting the side plates and the end plates into two equal parts in a bisecting manner. The locking method includes: the side plate and the end plate are locked, the side plate and the locking piece are locked, the locking piece and the locking piece are locked, the central cover of the two cover plates are interlocked with each other, and the bottom plate and the inner plate are closed. The sheet is locked, the inner edge plate and the inner end plate are locked, the cover plate is inserted into the rake sheet and the front plate is locked.

The lid structure of the disc folding carton is generally divided into a cover type, a swing cover type, a plug type, a positive seal and a drawer cover type.

The lid-type box and the lid are two independent disk-type structures, and the length and width of the lid are slightly larger than the box. Mostly used for clothing, footwear and other packaging. If necessary, bonding at the folding end face can increase the stiffness and strength of the carton and is suitable for packaging heavier goods. According to the relative height of the box body, the lid box can be further divided into three types of structures: sky cover type, cap type, and cover type. The plug-in type is similar to the continuous flap cover in the tubular folding carton. The drawer type lid is tube shaped, and the box body is disc shaped. The lid box body has two independent structures.

Tube and non-tube non-disc folding cartons

The tray type folding carton is a characteristic part of the box type, and a part of the box body of the disc cartridge is formed by the rotational molding method of the tube box. Since the characteristics of the tube-type folding carton are local, it should belong to the disc tray in a strict sense. In fact, its tube cassettes evolved on the basis of end plates or side plates of disc trays.

Non-tube non-disc folding cartons are usually partitioned multi-packs, whose structure is more complicated than tubular and disc cartridges, and the production process and manufacturing equipment are also increased accordingly. The non-tube non-disc cassette has two characteristics: the main structure of the carton has a plurality of cutting lines, and the two partial structures of the carton with the boundary of the cutting line are one inside and the other one outside; the main structure of the carton Along the right and left ends of a certain cutting line, there is a certain distance between the horizontal movements of the paperboards, and they overlap each other in a certain position. Typical non-tube non-disc cassettes include reverse-twist fixed structures and reverse-twisted multi-beverage beverage collection packages.

Paste tray design features