When it comes to paper product packaging, many people think of paper trays and cardboard. These two are common packaging products, the following will introduce the similarities and differences between them.

The production materials are basically the same: the production of paper trays and cardboards can use the basic materials of papermaking, such as reed, bagasse, wheat straw and other herb fiber pulp or discard paper products to recover pulp. The chemical additives used in the production process are also basically the same, such as retention aids, drainage aids, wet strength agents, dry strength agents, water repellants, oil repellants, dyes, brighteners, etc., as well as environmentally friendly materials Made of environmentally friendly paper trays.

The material handling process is basically the same as the equipment:

If waste paper is used to produce cardboard, it must be sorted by waste paper, crushed by hydraulic pulper, refined by beating machine or refiner, and pulp sizing. pulping and other processes, and then pumped to the paper machine for sheet forming, pressing and dewatering, and drying cylinder drying to become paper products. Wheat straw pulp or waste paper materials are used for pulp molding production, and they are also processed by hydropulper disintegration, pulping machine or refiner refining, pulp sizing, pulping and other processes, and then transported to the paper molding machine for molding, Kneading and dehydration, drying and shaping, etc., become qualified pulp molding products. The material handling equipment in the two production processes can even be used in common, but differ in forming and drying equipment.

The molding principle is similar:

Although paper trays and cardboards have similar forming principles, they are produced in different ways. The production of paper trays and the production of paper and cardboard are formed by wet forming, and then dehydrated and dried to become products. The difference is that the paper or cardboard is dewatered and formed by “spraying” or “fishing” the pulp on the forming wire (metal or plastic wire) in the wet end of the paper machine. The wet paper sheets and dry products are all continuous flat belts. , and rolled into a roll-like manner.

Differences: The forming and drying equipment used by the paper holder and the cardboard are different. The paper or cardboard paper machine is generally a relatively large-scale equipment that integrates forming and drying.