Paper and plastic bags, also known as three-in-one composite paper bags, are small-sized bulk containers. They are mainly used for human or forklift trucks to realize unitized transportation. They are convenient for shipping small bulk powdery materials, have high strength and waterproofness, and are of high appearance. Easy to handle and other features, is a popular and practical general packaging material. With the improvement and development of the process, paper and plastic bags have been more and more widely used: industrial packaging, food packaging, electronics, aerospace, science and technology, military and other fields can be paper-plastic composite bags of plastic composite bags - composite plastic weaving The bag is made of a plastic woven bag (abbreviated as cloth) as a base material and is compounded by a casting method (the fabric/film composite is two-in-one, and the cloth/film/paper composite is three-in-one). They are mainly used for packaging powdered or granular solid materials such as chemical fertilizers, synthetic materials, explosives, grain, salt, minerals, and flexible articles.
Paper bag advantages:
1, high strength: paper-plastic composite bag, the inner layer is a PP or PE woven fabric, the outer layer is a refined composite kraft paper, the middle is a composite plastic, this product has a strong anti-piercing, tear-resistant features.
2, beautiful appearance: the use of yellow or white refined kraft paper production, three-color printing, beautiful appearance. 3, anti-slip is good: the selection of anti-slip degree in the kraft paper above 25 degrees, easy to stack.
Environmental protection has always been a national initiative to protect resources. At present, the waste of resources in China is very serious, and this will happen in different industries. In order to reduce this phenomenon, paper and plastic bags produced by plastic bag companies effectively avoid this waste. Waste paper bags can be recycled through the separation of paper and plastic bags. There are usually two methods:
First, through the pure heating method
The paper-plastic composite paper is placed flat on a heating plate and heated by a heating plate; when the temperature is between 150° C. and 280° C.; after heating for 20 seconds to 50 seconds, the plastic on the paper-plastic composite begins to shrink and deform. Separated from paper. The method can separate waste plastic paper bags that cannot be processed in the past, so that the waste paper can be recycled, and the pulp and paper can be used; the waste plastic can be regenerated and granulated, and the paper-plastic composite bag can be re-wired or injected into a new plastic. product. The method can combine the waste paper-plastic composite bag with turning waste into treasure, and solve the environmental protection problem, so it has enormous economic and social benefits.
Second, the separation of paper monomers by organic solvent dissolution
The waste paper-plastic composite materials are used as raw materials, and the paper monomers are dissolved and separated with organic solvents, followed by a beating and papermaking process. The raw materials are dissolved in a dissolving tank with organic solvents, heated and stirred to dissolve the plastic layers of the paper-plastic composite materials. After separating the paper monomers and other monomer layers and drying, the paper sheets are sorted and beaten to make paper. The method is simple and feasible. It has high separation efficiency and good effect on paper-plastic composite bags. The paper after separation can be used for papermaking and reduce the papermaking production cost. The woven bags can be used for recycling to create woven bags or other plastic products, achieving resource recycling. Comprehensive utilization and protection of the environment have good social and economic benefits.
Through separation, the use of paper and plastic bags can be used once again, which will not cause serious waste and ensure that national resources can be fully utilized, thereby reducing some of our costs.