Frequently Asked Questions
Q1.Why are pulp tray weights inconsistent?
First, pulp consistency is constantly changing. When a small part of the pulp adheres to the mold during the production process, the concentration of the remaining pulp will change, and the change is generally controlled between 2.56% and 3.6%.
Second, the vacuum is constantly changing. In pulp molding systems, the amount of negative pressure generated by the negative pressure tank (part of the air compressor) is a variable in the production process. Due to the above two reasons, the weight of paper plates with the same pulp suction time varies between ±10%.
Q3.How to install the paper pulp molding machine? Do you offer an installation service?
We will dispatch engineers to assist customers in installing equipment. In addition, we also provide free remote installation services, including professional guidance videos, installation manuals, and online guidance from technicians.
Q5.How to choose forming mold?
1. The best way is to mail the sample to us, and we will accurately measure the grinding tool and produce model drawings.
2. If no sample is available, please provide accurate dimensional data.
Q7.How to make the surface of pulp tray smooth and neat?
he pulp tray is in a semi-wet state after demolding. After the drying process, they undergo a certain degree of deformation. We usually use a high-temperature (150°~250°), high-pressure (3T~50t) heat press to further refine the appearance of the paper try.
Q2.What is the raw material of paper tray mold?
Paper tray molds are commonly made of plastic, aluminum, or half plastic and half aluminum. The service life of plastic molds can reach more than 2 years and Jenny offers a one-year warranty. The service life of aluminum molds can reach more than 3 years and Jenny offers a two-year warranty.
The egg tray can be made with aluminum molds or plastic molds.
Other shapes recommended aluminum mold.
Q4.Can agricultural residues such as straw and sugarcane bagasse be used as raw materials?
No, the raw materials used to manufacture pulp trays should contain long fibers. Agricultural waste, such as straw and sugarcane bagasse, requires special treatment (to make plant fiber pulp) before being used in production. Agricultural residues cannot be used directly as raw materials.
Q6.Why do slight cracks appear on the surface of pulp trays?
This is very normal. When the wet paper tray is first formed on the mold, the pulp fibers naturally build up layer by layer. However, the liquid pulp is fluid and will flow out of the mold grooves, resulting in uneven paper plate thickness after high-temperature drying. When a fully dry pulp tray is squeezed by a strong external force, the outermost fibers can easily break and form small cracks. This phenomenon does not weaken the paper plate and therefore does not affect its use.
Q8.How can I get different colors?
The dyeing of pulp trays is mostly achieved by adding water-soluble dyes to the raw pulp during the pulp preparation process. However, uneven pulp concentration will affect the dye concentration.
The dyeing of pulp trays is mostly achieved by adding water-soluble dyes to the raw pulp during the pulp preparation process. However, uneven pulp concentration will affect the dye concentration.
