EPP material is a new type of environmentally friendly material and is applied in multiple fields. Today, we mainly talk about the processing flow and performance and uses of EPP materials.
Close the mold and preheat the mold to make the surface temperature of the mold reach the melting point of EPP.
Feed the material so that it enters the mold through the material gun.
Pass steam into the mold in three steps.
Steam scouring: Steam scours from top to bottom to expel air. Condensed water in the steam chamber flows out. During this process, open the upper steam inlet valve and the lower condensed water discharge valve.
Lateral steam: Make steam sweep from one side of the steam chamber to the material, penetrate the material and reach the other side. At this time, close the condensed water valve on one side and open the steam inlet valve. At the same time, close the steam inlet valve on the opposite side and open the condensed water valve so that steam is ejected from the opposite direction. If there is a thin flange in the mold, it is best for steam to pass around the flange so that the material sandwiched inside the flange can also be steamed and melted.
Pressure maintenance: After passing lateral steam, a pressure maintenance or double-sided steaming and melting process is required. During this process, open the steam inlet valve and close the condensed water discharge valve to gradually reach the peak pressure.
Cooling: After passing steam, the temperature inside the mold generally reaches 140 °C. In order to ensure the smooth demolding of the product, the mold temperature must be reduced to 70 °C.
Demolding of EPP material products: With the release of internal pressure and the temperature dropping to the allowable demolding temperature, the demolding operation can be performed.
Drying and shaping: Generally, the drying temperature is set at 60 °C - 80 °C. The drying room should maintain dry air and good ventilation.
EPP turnover boxes are used to protect and turnover products such as food and materials, which can ensure the safety of products. So what are the specifications of epp turnover boxes and what are the characteristics in terms of performance? Next, we will introduce them one by one.
Specifications: Various specifications, types, colors and sizes of epp fresh cold chain insulation boxes can be produced to meet different consumption needs of customers. Welcome to provide drawings and samples for processing.
Performance: The insulation box of epp fresh cold chain has a very good insulation effect. EPP material itself has very good insulation and heat preservation functions. Moreover, the epp insulation box is resistant to friction, easy to clean and can be reused. The environmental protection performance of EPP material is very good without any harm, and it is a good choice for fresh packaging.
Main uses:
Used for the insulation transportation of fresh food in cold chain transportation.
Hollow panels, mainly replacing ideal environmentally friendly materials such as corrugated cardboard, wood boards, and metal boards.
Turnover boxes, parts turnover boxes, food turnover boxes, beverage turnover boxes, pesticide packaging boxes, backing plates and partitions for the inner packaging of precision instruments, and transportation and storage turnover boxes.
Industrial plates, outer packaging protection for various items, backing plates, storage racks, partitions, bottom plates, cross plates, etc.
Electronic industry packaging. Conductive packaging products are mainly used in the packaging of electronic parts. The purpose is to prevent other charged items from contacting with it and causing parts to be damaged by sparks due to charge friction. In addition, there are conductive and antistatic plastic plates, turnover boxes, etc.