How is the moisture-proof effect of kraft paper bag after using MOPP+paper+PE material?
Publish Time: 2025-03-20
As a traditional packaging material, kraft paper bag is widely favored for its environmental protection, degradability and natural texture. However, the moisture-proof performance of traditional kraft paper bag is not ideal due to its certain water absorption. In order to improve the moisture-proof performance of kraft paper bag, modern packaging technology introduces MOPP+paper+PE composite material. So, when kraft paper bag uses MOPP+paper+PE material, what is its moisture-proof effect?
MOPP (biaxially oriented polypropylene) is a plastic film with high gloss and good printing performance. It not only improves the beauty of the packaging bag, but also has good stiffness. Introducing MOPP material in kraft paper bag can serve as a moisture-proof barrier to effectively block the intrusion of external moisture. The tear resistance and high unwinding rate of MOPP material also make it perform well in the automated production process, further improving the production efficiency and moisture-proof performance of kraft paper bag.
As the base layer of packaging material, kraft paper itself provides the necessary strength and structural stability. At the same time, the environmental protection and natural texture of kraft paper are also important reasons for its wide application. However, the water absorption of kraft paper limits its application in moisture-proof packaging. In order to overcome this defect, modern packaging technology uses PE (polyethylene) material as the inner layer. PE material has good flexibility and heat sealing properties, making the bag easy to seal and moisture-proof. The PE layer fits tightly to the inside of the kraft paper, forming an effective waterproof barrier, which greatly improves the moisture-proof performance of the kraft paper bag.
When the kraft paper bag uses MOPP + paper + PE material, the three layers of material are closely combined and work together. The MOPP layer as the outer layer provides good gloss and printing performance, and also has a certain moisture-proof function. The kraft paper layer as the middle layer provides the necessary strength and structural stability. The PE layer as the inner layer fits tightly to the inside of the kraft paper, forming a solid waterproof barrier. This composite material structure enables the kraft paper bag to have excellent moisture-proof performance while maintaining the original environmental protection and natural texture.
In practical applications, the kraft paper bag made of MOPP+paper+PE material has shown good moisture-proof effect in many fields. For example, in food packaging, this kraft paper bag can effectively prevent food from getting damp and deteriorating, and extend the shelf life of food. In logistics transportation, this kraft paper bag can protect goods from the influence of humid environment and ensure the safety of goods during transportation.
In summary, after the kraft paper bag adopts MOPP+paper+PE material, its moisture-proof effect has been significantly improved. This composite material structure not only maintains the environmental protection and natural texture of the kraft paper bag, but also greatly improves its moisture-proof performance. In practical applications, this kraft paper bag has shown good moisture-proof effect in many fields, bringing new development opportunities to the modern packaging industry.
