Paper trays are environmentally friendly paper products of different types and uses through production and processing of various paper raw materials. They are currently environmentally friendly packaging that is widely used in many fields. What are the similarities and differences between paper tray production and cardboard?
1. The similarities and differences between papermaking and paper tray production:
The raw materials for the production of paper trays are basically the same: pulp molding production and paper and cardboard production can use basic papermaking raw materials, such as reed, bagasse, wheat straw and other herbaceous plant fiber pulp or waste paper recycling pulp. 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. In addition, there are environmentally friendly materials to make Made of environmentally friendly paper trays.
2. The raw material processing technology and equipment are basically the same:
If the paper tray is made of waste paper raw materials to produce cardboard, it must go through waste paper sorting, hydraulic pulper crushing, beating machine or refiner pulping, and pulp sizing. The pulping and other processes are then pumped to the paper machine for sheet forming, squeezing and dewatering, and drying cylinder drying driving processes to become paper finished products. Pulp molding production uses wheat straw pulp or waste paper as raw materials, which must 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, Extrusion, dehydration, drying and shaping, etc., become qualified pulp molded products. The raw material processing equipment in the two production processes can even be used in common, but they are different in terms of forming and drying equipment.
3. The forming principle is similar:
Although the forming principle of the paper tray and the cardboard is similar, the form of the finished product is different. Both paper tray production and paper and cardboard production are formed by wet forming, then dehydrated and dried into finished products. The difference is that the paper or cardboard is "sprayed" or "fished" on the forming net (metal net or plastic net) in the wet part of the paper machine to form a dehydration. The wet paper and the dried finished product are all continuous flat belts. , And rolled into a roll-like form.
Differences: Paper trays and cardboards use different forming and drying equipment. Paper or cardboard papermaking machines are generally large-scale equipment that integrates forming and drying.
