The paper tray also belongs to a kind of pulp molded packaging packaging. In order to avoid the occurrence of the two problems of water dripping and squeezing of the paper tray, we can put the PP bag in the box after the molded pulp packaging is completed, which can not only prevent the logistics from causing the molded pulp packaging to be squeezed. , If it happens to be rainy, it will not get wet. But do you know what to do to make the paper tray appear white?
Wet-pressed paper trays are common packaging in the market. At present, white wet-pressed paper trays are commonly used. However, the whiteness of white paper trays on the market varies greatly. How to deal with wet-pressed paper trays can be white
Since the pulp fiber has a yellow to off-white nature, it is difficult to appear pure white even after bleaching. This leads to the fact that although there are many white wet pressed paper tray products on the market, due to the difference in raw materials and processing technology, the paper tray The degree of whiteness is also quite different.
At present, in the whitening method of wet pressed paper trays, it is more common to choose to add dyes such as royal blue and turquoise blue to the pulp to make it appear relatively pure white through dyeing and toning. This method is called whitening. For pulp with higher whiteness, we mostly use some fluorescent whitening agents to increase the brightness of the white color, which can also make the wet pressed paper tray play a role in whitening.
In addition to creating bright white paper trays, different colors can be customized according to needs. By adding water-based dyes to the original pulp, we can provide customers with diversified wet-pressed paper tray products. Some logistics companies pay the shipping cost for the order. The report is very low, and the service is correspondingly lowered. The timeliness cannot keep up. The quality of the workers is low, and the loading and unloading causes damage to the pulp molded products. Therefore, you must be cautious in the choice of logistics. Therefore, the paper tray manufacturers suggest that everyone should consider all aspects. comprehensive.
