Research and Development of Insurance Corrugated Carton

Corrugated cartons are important packaging products. With the emphasis on the environment and the improvement of packaging requirements for agricultural products, corrugated carton packaging has become more and more important. The traditional corrugated cartons are mostly used for the packaging of processed products or industrial products, but as living fresh agricultural products put forward higher requirements for their packaging and preservation. How to make the traditional corrugated cartons multifunctional, especially to adapt to long-distance commodity circulation, storage and transfer, and add value, so that the development of new types of preservation of corrugated cartons is very urgent.

Corrugated carton preservation principle

1. Preservation Principle of Traditional Corrugated Boxes The principle of preservation of traditional corrugated boxes is to utilize the moisture absorption of paper fiber materials to regulate the moisture and humidity in the packages so that no dewdrops and water droplets are produced in the package, thereby eliminating certain bacteria and dimensions. Creatures multiply inside the box and eventually reach a limited freshness. This preservation method has a good effect on the preservation of fruits (such as apples, pears, etc.). However, the preservation effect is very limited, for example, once the environment is relatively poor, or the packaging itself has special requirements (such as high humidity, strict temperature and hygienic conditions in the packaging, etc.), it is difficult to achieve the preservation function.

2. Preservation Principles of Modern Corrugated Boxes The principle of preservation of modern corrugated boxes is the crossover and penetration of new technologies and related disciplines, so that corrugated boxes can achieve moisture retention, heat preservation, atmosphere regulation, inhibition of microorganisms, reduction of respiratory intensity, and prevention of oxidation of packaged products. And rot etc. That is, in the manufacture of corrugated box packaging, it is necessary to use chemical, environmental, biological, electromechanical, materials and other discipline knowledge, to modify or combine packaging materials to achieve multi-functional.

Preservation of corrugated cartons

l, technology and methods
Fresh-keeping corrugated cartons technology and methods are based on the fresh-keeping characteristics of fresh-keeping packaging products, combining functional materials or technologies that meet their characteristics, and utilizing the characteristics of packaging engineering to make corrugated boxes have the function of preservation. There are two main types of technologies and methods. One is the modification of paper fiber materials; the other is surface treatment and structural innovation.

(1) Paper-based processing and preservation technology
Paper-based processing and preservation technology refers to adding raw materials or additives with fresh-keeping functions to the original paper-making raw materials when manufacturing fresh-keeping packaging paper. After the packaging is produced, the fresh-keeping functional raw materials or additives that are added during the packaging of the agricultural products will exert their freshness. Paper-based processing and preservation technology The most common method is the use of Chinese herbal medicine as a papermaking additive. For example, herbal slag is used as an additive for fresh-keeping packaging paper.
The paper-based processing preservation technology is characterized by the preservation of the cardboard (sheet) before forming. Including raw material processing (denaturation or modification) in the original sense, adding additives with functions of preservation, preservation, sterilization, etc., or adding or changing the original material composition. In a strict sense, the paper-based processing and preservation technology is a category of paper packaging materials and belongs to the development and manufacture of special packaging paper.

(2) Integral infiltration fresh-keeping technology
Integral infiltration fresh-keeping technology is to infiltrate the liquid ingredients with different preservation effects in the packaging cardboard. After being packaged, the components penetrated in the package will exert different preservation effects when fresh produce is packaged.
The whole infiltration fresh-keeping technology mainly utilizes the water absorption of paper, and at the same time, the substances with fresh-keeping function are dissolved into the internal gaps in the paper. The key to this technology is to select different infiltration material components for different agricultural products. These substances include special materials such as hydrophobic, eucalyptus, and antioxidants.

(3) paper surface treatment and preservation technology
The paper surface treatment and preservation technology mainly refers to coating (or covering other materials) or surface spraying on the paper surface. The purpose is to increase the tightness of paper packaging and reduce the evaporation and loss of fresh produce moisture or other easily evaporating substances (ingredients), so as to achieve the effect of preservation. For example, leafy vegetables or spices are used in this way to extend shelf life.
The spraying of paper surface is mainly coated with gelatinous or oily substances on the surface of the packaging, so that the paper packaging can increase the rigidity and strength, and at the same time, the water evaporation rate of the fresh agricultural products can also be reduced to achieve the purpose of preservation.
(4) Hole arrangement preservation technology
Hole arrangement Fresh-keeping technology refers to the arrangement of vent holes in paper packages. Including the size of the pores of the paper itself and the arrangement of the vents specially provided on the package.
Holes in paper itself are difficult to change after paperboard is made, but in order to use existing papers to make fresh packaging with a certain porosity (transmittance), it is necessary to reasonably select papers with different densities or to combine papers with different porosity or Composite use. The vent holes on the packaging are used to produce holes with different sizes and orientations for the permeability of the agricultural products that require higher air permeability during packaging. For example, fruits and vegetables packed in corrugated boxes have special ventilation holes for long-distance transportation and storage. It is the easiest and most economical method to open the vent directly on the package, but it will affect the strength and life of the package.

(5) Additional structure preservation technology
This technology is to achieve the preservation by adding accessories in the carton. For example, in the interior of the packing box, there are corners, pads, partitions, etc. that have special functions (oxygen absorption, ethylene absorption, moisture retention, mildew proofing, etc.). These attachments or additional structures can be individually formed into a single functional accessory (carton accessory) or a multi-purpose series of carton attachments. When used, choose according to different products and circulation, storage environment, shelf life.

2. Preservation of corrugated boxes

(1) Antibacterial Preservative Corrugated Cardboard and Carton

The preservation of fresh fruits and vegetables is important for the control of environmental conditions such as temperature, humidity, and air in packaging containers. For example, maintaining a moderately low temperature can inhibit the respiration of the contents. Maintaining proper humidity can reduce the evaporation of water, and the ethylene gas emitted from the contents should be eliminated to suppress aging. In addition, another important reason that is harmful to the preservation of fruits and vegetables is the wilting and decay of fruits and vegetables caused by the contamination of pathogenic microorganisms. Therefore, how to take measures to inhibit the proliferation of microorganisms to achieve antibacterial preservation is also a problem that cannot be ignored. Corrosion resistant corrugated cardboard is coated with a layer of antibacterial antiseptic on the surface of the liner in the cardboard. This preservation has no effect on food hygiene.

Cartons made of antibacterial fresh-keeping corrugated cardboard can suppress the temperature, moisture, gas, and microorganisms inside the box more comprehensively, and extend the freshness of vegetables and fruits.

(2) Silica Hybrid Liner Corrugated Paperboard and Carton

This kind of corrugated cardboard has good preservation performance. The processing of the cardboard is exactly the same as that of ordinary corrugated cardboard. It is not necessary to add any material between the liner and the corrugated cardboard. Its fresh-keeping effect lies in that the inner liner of the paperboard contains a powder capable of absorbing ethylene gas. The powder is a porous powder made of silica as a main component, and the white silica is used for adsorbing ethylene gas. The performance is better than that of activated carbon, rare earth zirconium, and zeolite. Therefore, the use of paper mixed with silica powder as the backing paper of corrugated board has better preservation effect.

Fresh-keeping corrugated cartons are a special kind of packaging and also a technological innovation product. It is the result of the cross integration of modern science and technology and packaging engineering, which reflects the development direction of modern packaging technology.
1. Fresh-keeping corrugated carton packaging must be studied and tested according to the preservation characteristics of the packaged products.
2. Preservation of corrugated cartons is a cross-application of multidisciplinary technologies. The basis of research must be based on a multidisciplinary basis, and its effects and performance must be tested and applied.
3, preservation of corrugated boxes including corrugated board research and innovation of corrugated boxes. The preservation of cardboard is the basis, but some preservation effects are also determined by the structure of the carton.
4. There are many types of fresh-keeping corrugated cartons, and the methods of preservation are also various. The effect of fresh-keeping corrugated cartons is different depending on the product being packaged and the storage and transportation environment.
5. The key to preserving corrugated cartons is the modification of traditional corrugated cardboard and the preservation and innovation of traditional corrugated box structures.