Pulp molding is a three-dimensional papermaking technology. It takes waste paper as raw material, and forms a certain shape of paper products on a molding machine through a special mold. It has four advantages: the raw material is waste paper, including paperboard, waste paper box paper, waste white paper and so on. , a wide range of sources; Its manufacturing process is completed by pulping, adsorption molding, drying and setting, which is harmless to the environment; Can be recycled; The volume is smaller than that of foam plastic, which can be overlapped and convenient for transportation. Pulp molding is not only used as lunch boxes and tableware, but also used as industrial cushioning packaging, which develops very rapidly.

Chinese name

Pulp molding

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Three-dimensional papermaking technology

nature

Take waste paper as raw material

kind

Waste paper box paper, waste white edge paper

quick

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Model product? Application field? product function

trait

Include egg boxes, egg trays, fruit trays, flower pots, disposable medical bedpans and the like. It uses waste paper as raw material, adds some moisture-proof agent (aluminum sulfate) or waterproof agent, and then makes model products of various shapes according to different uses, which are used as packaging cushions for eggs, fruits, precision devices, fragile glass, ceramic products, handicrafts and so on, with good buffering and protection performance. The forming technology and equipment for producing pulp have developed rapidly, and the basic process is four processes: pulp preparation, forming, drying and setting. Domestic equipment is mainly semi-automatic, while foreign equipment is almost fully automatic and energy-consuming assembly line;

Model product

Pulp molded products are new packaging materials developed rapidly in recent years and are excellent substitutes for wood. Pulp molded products adopt the manufacturing process of beating raw materials, proportioning, forming, drying and setting. Because a large amount of water (about 55-60%) remains on the workpiece after molding, the water content of the final product is 12- 14%, so it is necessary to remove about the weight of the workpiece during the drying process, and all of this water will be removed by absorbing heat and turning into steam. Because of the phase change in the drying process, the energy consumption is very high, and the pulp molded products are processed into high energy consumption products. Therefore, it is necessary to make a thermodynamic analysis of the energy conversion process of its drying. Because, through the analysis, we can improve the design and processing of drying equipment, improve the utilization rate of energy, and have important guiding significance for reducing the production cost of pulp molding products industry.