knowledge of packaging

Through the analysis of product transportation links, we can provide the best packaging solutions and reduce the customer's product logistics costs.

About plywood
A sheet of plywood, usually glued together in a direction perpendicular to the direction of the adjacent wood grains, usually arranged symmetrically on both sides of the central or board core.

• plain plywood: plywood with or parallel to the long side of the board.
• corrugated plywood: plywood with or parallel to the short edge of the board.
• special plywood: plywood for special purposes.
Indoor plywood: plywood with weather resistance, water resistance and high temperature resistance.
Plywood 1: weather resistant plywood, which is durable, resistant to boiling or steam treatment and can be used outdoors.
• indoor glue board: not glued with rice that has long been subjected to immersion or excessive temperature.
Plywood 2: water resistant plywood, this kind of plywood can be dipped in cold water or subjected to a short period of hot water immersion, but it is not resistant to boiling.
Plywood 3: moisture resistant plywood, this kind of plywood can be used for short term cold water immersion and is suitable for indoor use.
Plywood 4: non moisture resistant plywood, this kind of plywood in indoor normal use, with a certain bonding strength.
Structural plywood: plywood with mechanical properties required.
• Star Shaped plywood: plywood made from a star shaped arrangement of sheets arranged in a star shape.
• sandwich plywood: plywood with a core board.
• Blockboard: the core of the board consists of strips of wood which can be glued or glued between strips.
Honeycomb board: the core is made of a honeycomb structure, usually with at least two layers of wood grain on each side of the core, each of which is vertically arranged.
Composite plywood: the core of a board (or some layers) consisting of material other than solid wood or veneer, usually with at least two layers of wood on each side of the core.
• decorative plywood: two sheets of veneer or one of them for decorative veneers.
Forming plywood: a non planar plywood formed in compression molding.
two: miter plywood or two or more of the plywood surface glue, to increase its size.
• refers to plywood: two or more than two plywood, the use of plate, edge, finger type staggered combination of glue, to enlarge the size of plywood.

About the packing case
According to the material is divided into:
• wooden packing box wooden case packing container made of wood and bamboo
• packing container for composite containers made of composite material
Divided into shapes:
Made of ordinary wooden box - component - plate, gear box etc..
• sliding wooden box with a sliding wooden chassis, the side and end of the box, box files made of wooden cases.
• closed box - closed wooden cases made of wooden boards, such as wooden boards.
• fastener packing box - a metal - connected packing case for easy disassembly. Beautiful appearance and beautiful appearance.
• cage packing box, wooden case, plastic box, carton three major categories. Under the stimulation of the current green environmental protection, the paper packing box has become the first choice for many enterprises in the field of packing box because of its unique green environmental protection features
Use of packing cases:
Packing box: suitable for domestic or export packing of all kinds of goods and products, economical and substantial.
• wooden box: suitable for large machinery, mechanical and electrical products or heavy equipment and production lines of packaging and transportation.
• a box: suitable for large plastic, cloth or automotive glass products to domestic transport packaging.
• panel box: it is a new type of packaging which can be used repeatedly. It is suitable for the packing of irregular products such as fasteners, metal balls and stamping parts. It is the best choice for the products exported to europe.
• Plywood box: suitable for general commodity packing and transportation. The total quality of single container loading is generally not more than 2 tons.


Wood moisture content
Wood and its products in normal condition will have a certain amount of moisture. In our country, the weight of water contained in wood and the percentage of wood weight after dry are defined as the moisture content of wood.
Moisture content can be calculated using the weight of all dry wood as the basis of calculation. The calculated value is called absolute water content, referred to as water content (W,%).

Calculation formula:

W=Gs-Ggo)/ Ggo×100%

W1=Gs-Ggo)/ Gs×100%


W——Absolute moisture content of wood;

W1——Relative moisture content of wood;

Gs——Wet wood weight;

Ggo——Dry wood weight。


Corrugated type of corrugated paperboard
Corrugated cardboard is made of glossy paper and corrugated paper. From the point of view of structural strength, its shape is very scientific and reasonable.
Corrugated board type: corrugated cardboard core is corrugated. Therefore, corrugated shapes, types and combinations have great influence on the properties of corrugated paper.
Types of corrugated: corrugated structure in the characteristics, is corrugated into corrugated. Corrugated is the main part of corrugated paper. Corrugated cardboard is made of the same texture and core paper, and the corrugated cardboard is different in shape.
Now, corrugated paper used in various parts of the world, there are several types: A type Leng, B type Leng, C type Leng, E type Leng

The use of these four kinds of Leng Leng can be summarized as follows:
For outer packing -- A, B and C type inner packing -- B and E type corrugated small package -- E shape


The features of A, B and C types for outer packing:
• A type A Leng Leng is characterized by a small number of corrugated units per unit length, while the highest corrugated. Corrugated boxes made of A - shaped roll are suitable for lighter packing and have greater cushioning force.
B type B type and A type Leng Leng Leng opposite number in the unit length of the corrugated corrugated and its performance is low, and the A type corrugated corrugated box corrugated instead, made using a • B type, suitable for packaging heavy and hard goods, used for canned and bottled goods packaging. In addition, there is a tendency to make use of B type hard and hard to break the characteristics of, after punching cut into a complex shape of the combination box.
• the number of corrugated per unit length of C type Leng C Leng is between A and B. The performance is close to that of A type. In recent years, with the increase of storage and transportation costs, the smaller size of C shaped beam has been paid attention to, and has become the European and American countries.
• the E type Leng Leng 30cm in the length of the number of generally 95 or so, the roll height of about 1.1 mm, and the outer packing of A, B, C type corrugated compared to, with a thinner, more rigid characteristics of E. Therefore, the main purpose of developing E shaped frames is to fold them into cartons to increase cushioning. The corrugated paper box made of E type corrugated board has beautiful appearance, smooth surface and complicated printing, so it is often used in decorative corrugated carton.


Types of corrugated paperboard
The type of corrugated board depends on the combination of various types of corrugated. Combination of different ways, corrugated cardboard physical properties are also different.
Usually corrugated cardboard can be classified according to its structure or use: single-sided corrugated cardboard, double corrugated cardboard (three layers of single corrugated cardboard)
According to the structure classification: double core double sided corrugated cardboard (five layers of double wall corrugated cardboard), three core double faced corrugated board (seven layers, three corrugated cardboard), inner packing corrugated cardboard
Classification by use: corrugated cardboard for outer packing
According to the structure classification, classification is based on the use of paper and paper and a few Zhang Xin said the same.

One,Single-sided corrugated cardboard

Single face corrugated board as shown in the waveform core paper taped to the side of the paper, according to the use of paper is called a number of definitions, single-sided corrugated cardboard is generally not used directly to the production of corrugated boxes, but the shape of a cylinder or cut into a certain size, as a buffer material and fixed materials to be used.

Two, double corrugated cardboard (three ply corrugated cardboard)

Double sided corrugated paper, as shown in the paper on both sides of corrugated tile paper made of. Leng type, using A, B, C, E, which can be. At present, corrugated cardboard is the most widely used carton in the world.

Three, double tile double corrugated cardboard (five ply corrugated cardboard), commonly known as double corrugated

The double tile double faced corrugated board is made of two layers of corrugated paper and paper, which is made of a single side corrugated cardboard and a double sided corrugated cardboard. In structure, it can be used in various combinations of corrugated shapes, so its performance is also different. Compared with the ordinary double faced corrugated board, the compressive strength can be improved obviously, and the utility model is more suitable for the packing of fragile articles, heavy articles and long preserved articles (such as fresh vegetables, fruits, etc., which contain more water).

Four, three watt double corrugated cardboard (seven ply corrugated), commonly known as three corrugated

Three core double faced (seven layers) corrugated paperboard is made of corrugated paper made of three layers, which is made of a double tile double corrugated paper on a single surface corrugated paper. And double watt double face (three layers) corrugated paper, can use A, B, C, E, a combination of various types of leng. In the structure, the use of three type of combination of corrugated cardboard, than using two type of combination of double sided tile (three layers) corrugated cardboard stronger, therefore, made the three watt double wall corrugated board corrugated box for packaging heavy items, to replace the last wooden case. And this carton is not limited and used alone, often with wooden tray and carriage combination. The combination of the two is fixed with a steel band or a special carton.