The dry pressing process means that after pulping, the slurry is injected into the forming mold through a pipeline, and after vacuum adsorption of excess water to form a wet embryo, the moisture of the wet embryo is reduced to about 40% by natural drying or through a special drying channel, and then the process is carried out. The process of shaping and molding, which is mostly used to produce low-grade pulp egg trays, pulp bags and other products.



Advantages: less thermal energy consumption, reduced energy consumption; mostly pulp products, waste paper can be recycled, low cost and low price; thicker product thickness, good shock resistance and compression effect; packaging electronic products can prevent static electricity;



Disadvantages: dry-pressed products (including semi-dry-pressed) products have rough surface and poor aesthetics; the wall thickness is thicker, accounting for a large volume;



Dry pressing process application fields:



1. Ordinary work bags generally refer to the linings, egg trays, fruit trays and other products of low-end electronic products produced by the dry pressing process of yellow pulp.



2. Agricultural packaging mainly refers to flower pots, seedling cups, egg trays, etc. Most of these products are produced by dry pressing process of yellow pulp and newspaper pulp. These products have low requirements for hygiene and product stiffness. Not high, but requires better waterproof performance.



3. Medical packaging, dry pressing is mainly used in places with low requirements such as bedpans, urinals, kidney-shaped trays, etc.