Describe the similarities and differences between the paper tray and the cardboard? The production materials are basically the same: the pulp molding production and the paper and cardboard production can use the basic papermaking materials, such as reed, bagasse, wheat straw and other herbaceous plant fiber slurries or discarded paper products. Recover the slurry. The chemical additives used in the production process are also basically the same, such as retention aids, filter aids, wet strength agents, dry strength agents, water repellents, oil repellents, dyes, brighteners, etc. There are also environmentally friendly materials. Egg tray made of environmentally friendly paper. We will briefly introduce the knowledge of paper trays and egg trays through the following article.
The material treatment process and equipment are basically the same: if the waste paper material is used to produce cardboard, it must be sorted by waste paper, broken up by a hydraulic pulper, refined by a beating machine or a refiner, and sizing the pulp. The pulping and other processes are then pumped to the paper machine for sheet forming, squeezing and dewatering, and drying cylinder drying processes to become paper products. Pulp molding production uses wheat straw pulp or waste paper materials, which must also be broken down by a hydraulic pulper, pulper or refiner, pulp sizing, pulping and other processes, and then transported to the paper plastic molding machine for molding, Processes such as kneading dehydration, drying and shaping, etc., become qualified pulp molded products. The material processing equipment in the two production processes can even be used universally, but they are different in terms of molding and drying equipment.
The forming principle is similar: although the forming principle of the paper tray and the cardboard are similar, the way of products is different. The production of paper trays and egg trays and the production of paper and cardboard are all molded by wet molding, and then dehydrated and dried into products. The difference is that the paper or cardboard is dewatered and formed by "spraying" or "fishing" the pulp on the forming net (metal net or plastic net) in the wet part of the paper machine. The wet paper and the dry products are all continuous flat ribbons. , And rolled into a roll-like way.
Differences: Paper trays and egg trays use different molding and drying equipment. Paper or cardboard papermaking machines are generally relatively large, forming and boring equipment.
Today, we will introduce the knowledge of paper tray and egg tray in detail here, and hope it will be helpful to you. For the knowledge of paper tray and egg tray, you can continue to pay attention to the official website to learn more about relevant knowledge.
