Kraft paper bag is a common food packaging material, usually tan and white, is also one of the environmentally friendly packaging. The kraft paper has a single structure, when tearing the kraft paper, it is easy to directly tear the kraft paper, the strength is relatively low, for this reason, our daily use of kraft paper bags for multi-layer composite kraft paper bags, after multi-layer composite, kraft paper bags in maintaining the original characteristics at the same time, there are both tear resistance, high strength characteristics.
In simple terms, multi-layer kraft paper bag is a kind of packaging container made of composite material or pure kraft paper, odorless, no pollution, low carbon environmental protection, in line with national environmental standards, high strength, environmental protection, is one of the international popular environmental protection packaging materials.
Multi-layer kraft paper bag products are very common in our life, such as melon seed bag, nut bag, coffee bag, grab cake bag, file bag, pet feed bag, popcorn bag, etc. In the past two years, with the global "anti-plastic" wind prevailing, the kraft paper packaging products are more and more favored by consumers, kraft paper has become the beginning choice of more and more enterprises packaging products. Has begun replacing plastic shopping bags with high-quality, multilayer kraft paper bags.
Multi-layer composite kraft paper bag, the common composite way is BOPP/ kraft paper /cpp and aluminum foil composite kraft paper, BOPP/ kraft paper /cpp this composite bag is cost-effective, good transparency, extinction film more texture. Aluminum foil composite kraft paper combines the high barrier property of aluminum foil with the flexural and impact resistance of paper to become a kind of high performance packaging material. At the same time, the resin in it can decompose when heated to high temperature, so that the paper and aluminum foil can be separated, thus greatly improving the recycling and recycling of materials, reducing the waste of materials and the load on the environment.
In the production, different specifications of kraft paper bag production methods are also different. Calf paper bag, generally this kind of bag quantity, wide range of application, therefore, many businesses require this kind of multi-layer kraft paper bag is cheap and durable, usually this kind of multi-layer kraft paper bag is machine forming, machine tying rope, completely operated by the machine. The practice of medium kraft paper bag, usually medium kraft paper bag is machine adhesion after manual bonding rope, due to the domestic kraft paper bag molding equipment is limited by the size of the molding, kraft paper bag rope machine can only stick smaller handbag rope, so the practice of kraft paper bag is limited by the machine, many packaging light by the machine is not done. Large kraft paper bags, these kraft paper bags should be handmade, domestic no machine can solve the molding problems of these kraft paper bags, can only be handmade, these kraft paper bags high production cost, the number is not large. No matter what kind of multi-layer kraft paper bag is above, if the number is not large enough, it is generally handmade, because the machine made of multi-layer kraft paper bag loss, so there is no way to solve the problem of the number of multi-layer kraft paper bags.
It should be noted that the bag of kraft paper bag is affected by raw materials, production season, production machine and other factors, and there may be color difference in different batches. Therefore, it is suggested to reserve as many bags as possible for the same batch to avoid color difference caused by replenishment in the later period.
