What Is Molded Pulp?

Pulp molding is a three-dimensional papermaking technology. It uses waste paper as a raw material and uses a special mold to shape a certain shape of paper products on a molding machine. It has four major advantages: The raw material is waste paper, including board paper, waste paper box paper, waste white edge paper, etc., from a wide range of sources; its production process is completed by pulping, adsorption molding, drying and shaping, and is harmless to the environment; It can be recycled and reused; its volume is smaller than that of foamed plastic, it can be overlapped, and the transportation is convenient. Pulp molding, in addition to serving as lunch boxes, tableware, and more for industrial buffer packaging, is currently developing very rapidly.

Pulp molding

Including egg box, egg tray, fruit tray, flower pot, disposable medical bedpan, etc. It uses waste paper as a raw material, adds some moisture-proofing agents (aluminum sulfate) or water-proofing agents, and then makes model products of various shapes according to different purposes. It is used as eggs, fruits, precision devices, and fragile glass , Ceramics, crafts, etc.
Pulp molded products are new packaging materials that have been rapidly developed in recent years, and are excellent substitutes for wood. Pulp molding products use: raw materials beating-ingredients-compression molding-drying-shaping manufacturing process. After the molding, a large amount of moisture (about 55-60%) remains on the workpiece, and the moisture content of the final product is 12-14%. Therefore, during the drying process of the workpiece, the moisture that accounts for the general weight of the workpiece must be removed. This part of the water must be removed by absorbing heat into water vapor. Due to the phase change in the drying process, the energy consumption is very large, and the pulp molded products are processed into high energy consumption products. For this reason, it is necessary to perform a thermal analysis on the energy conversion process of the drying. Because the analysis can improve the design and processing of the drying equipment, improve the energy utilization rate, and have a very important guiding significance for reducing the production cost of the pulp molding products industry.
Pulp molded products are solid containers used to contain and limit the packaged materials, and serve the circulation and storage of goods.
The function of pulp molded products is to contain and protect the packaged products, which is convenient and practical.
Including and protecting packaging products is the primary function of pulp molded products. The pulp molded products shall be able to reliably contain the packaged products specified by the packaging, so that the packaged products are not damaged during transportation, loading and unloading, and use, and meet the requirements of strength, stiffness and stability. The materials used for pulp molded products are also safe for the packaged product, and the two do not interact.
Convenient to use, the structure of pulp molded products should be pleasant. The structure and shape of the pulp molded products should not endanger the human body, and adapt to the operation and handling of the human body during use.
Thirdly, the pulp molded product uses its own special structure to degenerate under load to prolong the corresponding time and absorb external energy, thereby reducing the impact and vibration of the package. It is different from the cushioning mechanism of foam plastic packaging products, because foamed products, because of the large number of compressible cells distributed inside the material, regardless of the shape of the product, it has good cushioning properties. If you use pulp plastic film materials and Foam plastic is made into a large plane, obviously the former can buffer, while the latter cannot buffer, so for the pulp and plastic film products, a good structural design is to complete the protection of the contents, improve during transportation and handling Basic guarantee of shock absorption capacity. The designed structural performance will directly affect the strength, stiffness, stability and practicability of the package, that is, the structure of the pulp molded product directly affects the realization of its packaging function.


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