Pulp moulding is a kind of stereoscopic papermaking technology. It takes the waste paper as the raw material, on the molding machine by the special mold shape a certain shape paper product. It has four advantages: raw materials for waste paper, including sheet paper, Waste paper box paper, waste white paper and so on, the source of a wide range of production process from pulping, adsorption molding, drying and other processes completed, environmentally friendly, renewable use can be recycled, volume than foam plastic small, overlapping, convenient transportation. Pulp molding, in addition to cooking boxes, tableware, more to do industrial cushioning packaging, the current development is very rapid.
Including egg box, egg tray, fruit support, flower pots, disposable medical bedpan and so on. It is made of waste paper as raw material, add some moistureproof agent (aluminum sulfate) or waterproof agent, and then according to different uses of various shapes of model products, used as eggs, fruit, precision devices, fragile glass, ceramic products, handicrafts and other packaging liner, has a good cushion protection performance. The production of pulp molding technology equipment developed rapidly, the basic process is slurry preparation, molding, drying, plastic four procedures. Domestic mainly semi-automatic equipment, and almost all of the foreign countries are fully automatic high energy-consuming pipeline;
Molded pulp products are the rapid new packaging materials in recent years, is a good substitute for wood. Pulp molded Products Adopt: Raw material beating--batching--molding molding--drying--stereotypes of the manufacturing process. As a result of molding, the workpiece left a large amount of water (about 55-60%), the final product moisture content of the 12-14%, so in the drying process to take off about the workpiece weight of the general moisture, this part of the water all to rely on the absorption of heat into steam off. As the drying process occurred phase change, energy consumption is very large, pulp molding products processing become high-energy products. Therefore, it is necessary to make thermodynamic analysis on the energy conversion process of drying. Because the analysis can improve the design and processing of drying equipment, improve the utilization of energy, it is very important to reduce the production cost of the pulp molding products industry.
Molded pulp products are used to contain and limit the packaging of solid containers, services in the circulation and storage of goods, etc., that is mainly used for commodity transport packaging.
The function of molded pulp products is: to contain and protect the packaged products, convenient and practical.
Containment and protection of packaging products is the primary function of molded pulp products. Molded pulp products should be able to reliably accommodate the packaging provided by the packaging products, so that the packaging products in the transport, loading and unloading, the use of the process is not damaged, and itself to meet the strength, stiffness and stability requirements. The materials used for molded pulp products are also safe for the packaged products, and they do not interact with each other.
Easy to use that is, the structure of molded pulp products should be pleasant. The structure and shape of molded pulp products should not endanger the human body and adapt to the operation and handling of the human body in the course of use.
Then, the pulp molded product is through its own special structure in the load time denaturation to extend the corresponding time, absorbing the external energy, thus reducing the packaging by impact and vibration. It is different from the cushioning mechanism of foam packaging products, because of the foam materials, because the internal distribution of a large number of compressed bubble hole, regardless of the shape of the product, it has a better cushioning performance, if the use of pulp plastic film materials and foam to make a large plane, it is obvious that the former can be buffered, and the latter is not buffered , so for the pulp plastic film products, good structural design is to complete the protection of the inside, in the transport and handling process to improve the ability to shock absorption of the basic guarantee. The design of structural energy will directly affect the strength, stiffness, stability and practicality of the packaging, that is, the structure of molded pulp products directly affect the realization of its packaging function.