Analyze the common problems of paper egg tray craft materials, the application of paper tray egg tray can be said to be more and more extensive in life, we can learn more about the knowledge of paper tray egg tray through the following articles.
1. What are the raw materials of paper egg trays?
Answer: There are two general categories; one is raw pulp (for example: raw wood pulp, bamboo pulp, sugarcane pulp, straw pulp, etc.). The second category is recycling (for example: corrugated paper, newspaper, white-edged paper). In addition, it is also valid for the production of colored paper trays and egg trays according to customer specifications.
2. Why are the net weights of paper egg trays inconsistent?
A: First, the pulp concentration is changing. In the production process, the prepared pulp with a certain concentration will start to change as the formed paper tray and egg tray are separated from the pulp cylinder of the forming machine, and the pulp concentration will generally be controlled between 2.56% and 3.6%. The second is that the vacuum is constantly changing. In the molding process, the negative pressure value of the negative pressure tank loaded by the air compressor is also a variable with the progress of production. The superposition of the two variables causes the weight of the paper and egg trays formed by the same suction time to vary between ±10%.
3. Why can't you or can't make the color I need?
Answer: For the dyeing of paper tray and egg tray products, water-based dyes are mostly added in the pulping process based on the original pulp. First, the change in the concentration of the pulp also leads to changes in the concentration of the dye during production. Second, most dyes are sensitive to temperature Very sensitive (during the drying process, the color also changes with the temperature of the drying line, and the mold temperature is 150° to 250° during hot pressing, and the dye will also change at different temperatures). In conclusion, products with high color requirements should not be dyed.
4. Why is your product not as smooth and neat as that product?
Answer: After the paper tray egg tray product is formed, it is fully wet and will deform after the drying process, and then use the high temperature (150°~250°) and high pressure (3T~50T) of the mold to restore the original geometric shape. The upper and lower mold clamping is subjected to vertical force, so the plane position is strongly stressed, the paper tray and egg tray appear smooth, and the inclined surface is not easily stressed and appears slightly rough. Then according to the actual requirements of product design, the smaller the slope, the more ribs, the smaller the plane, and the more the spherical arc surface, the lower the rear smoothness. This is the result of craftsmanship.
For some knowledge of paper egg trays, we will introduce them here in detail today, I hope it will be helpful to everyone. For the knowledge of paper egg trays, you can pay attention to the official website for more relevant knowledge.
