The core technology of paper packaging materials
As an important component of the packaging industry, the performance and quality of paper packaging materials directly affect the effectiveness of packaging and the protection of products. In the process of continuous development, many core technologies have emerged for paper packaging materials, which play a key role in improving packaging quality and expanding application fields.
Native fiber pulp technology
Native fiber pulp is the foundation of high-quality paper packaging materials. Through advanced mechanical and chemical pulping processes, pure and high-strength fibers can be extracted from high-quality wood and other raw materials. Mechanical pulping technology can preserve the natural length and strength of fibers, giving paper good toughness and stiffness. Chemical pulping, on the other hand, removes impurities and pigments through precise control of cooking, bleaching, and other processes, improving the whiteness and purity of the paper. For example, when making high-end picture books, exquisite gift boxes, and other packaging, using paper made from native fiber pulp can not only present delicate printing effects, but also ensure that the packaging is not easily deformed or damaged during long-term use.
Regenerated fiber processing technology
With the increasing awareness of environmental protection, the application of recycled fibers in paper packaging is becoming more and more widespread. The recycled fiber processing technology aims to improve the performance of recycled fibers to meet different packaging needs. Firstly, through efficient fiber separation technology, the fibers in the waste paper are separated from impurities to improve the purity of the fibers. Next, using fiber reinforcement technology, the regenerated fibers are subjected to physical or chemical treatment to enhance their strength and flexibility. For example, by adding special chemical additives, the bonding between recycled fibers can be made tighter, improving the overall strength of the paper. Processed regenerated fibers can be used to make packaging for various daily necessities, such as express delivery boxes, ordinary paper boxes, etc., which not only realizes the recycling of resources but also ensures the basic performance of packaging.
Moisture resistant coating technology
For many product packaging, moisture resistance is crucial. The moisture-proof coating technology effectively prevents the intrusion of moisture by coating one or more layers of moisture-proof materials on the surface of paper. Common moisture-proof coating materials include plastic coatings such as polyethylene (PE) and polypropylene (PP), as well as special coatings such as organosilicon and wax. PE coating has good flexibility and moisture resistance, and can evenly cover the surface of paper, forming a waterproof barrier. Organic silicon coatings have excellent breathability and moisture resistance, allowing for a certain degree of gas exchange while ensuring the dryness of the products inside the packaging. They are suitable for packaging products that are sensitive to humidity and require breathing, such as food and drug packaging.
Antibacterial packaging technology
Antibacterial packaging technology has become an important development direction for paper packaging in fields such as food and healthcare. By adding antibacterial agents to paper or using coatings with antibacterial properties, it is possible to inhibit the growth and reproduction of microorganisms and extend the shelf life of products. Common antibacterial agents include silver ions, nano zinc oxide, etc. Silver ions have broad-spectrum antibacterial properties and can effectively inhibit the growth of various harmful bacteria such as Escherichia coli and Staphylococcus aureus. Adding antibacterial agents containing silver ions to paper coatings, when microorganisms come into contact with the surface of the paper, the silver ions will destroy its cellular structure, thereby achieving antibacterial effects. This antibacterial packaging technology not only ensures the quality and safety of products, but also reduces losses caused by microbial contamination of food and other products.
High strength composite material technology
In order to meet the requirements of packaging strength and protective performance for some special products, high-strength composite material technology has emerged. Combining paper with other high-strength materials such as plastic film, aluminum foil, etc. can integrate the advantages of multiple materials. For example, paper aluminum-plastic composite materials combine the printability and environmental friendliness of paper with the barrier properties of aluminum foil and the flexibility of plastic film to form a packaging material with high strength and good barrier properties. This material is widely used in fields such as liquid food packaging and pharmaceutical packaging, which can effectively protect products from external environmental influences while ensuring the durability and aesthetics of the packaging.
The core technology of paper packaging materials continues to innovate and develop, providing strong support for meeting the diverse packaging needs of the market. Whether it is the pursuit of high-quality native fiber pulp technology, environmentally friendly recycled fiber processing technology, or moisture resistant, antibacterial, high-strength composite material technology with special functions, they are all driving the paper packaging industry towards higher quality, environmental protection, and multifunctionality.
