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2022

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09

The difference between Supercritical foaming equipment and traditional foaming equipment

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Supercritical foam molding in Supercritical foaming equipment is a physical foam molding technology and also a microcellular foam molding technology. It is a process of injection molding, extrusion and blow molding.

Supercritical foam molding in Supercritical foaming equipment is a physical foam molding technology and also a microcellular foam molding technology. It is a process of injection molding, extrusion and blow molding. Other gases such as carbon dioxide or nitrogen are injected into a special plasticizing device, so that the gas and the molten raw materials are fully and uniformly mixed/diffused to form a single-phase mixed sol, and then the sol is introduced into the mold cavity or extrusion die, so that the sol is produced A large pressure drop causes the gas to precipitate to form a large number of bubble nuclei; in the subsequent cooling and forming process, the bubble nuclei inside the sol continue to grow and form, and finally a microcellular foamed plastic product is obtained.

Factory supply Supercritical foaming equipment

Microporous plastic products have high specific strength and high cost performance, which can greatly improve the dimensional accuracy of products and shorten the product development cycle; greatly reduce product residual stress, reduce and improve product warpage deformation; eliminate surface sink marks; shorten the molding cycle of thin-walled products; Effectively save raw materials and reduce product quality; low cost of foaming agent, environmental protection; mixed sol fluidity is enhanced by 20%~40%, low viscosity, easy to fill the mold; supercritical gas equipment has simple process, low cost, and environmental protection.

Supercritical foaming equipment CO2 has high diffusivity and low mass transfer resistance, so it is particularly beneficial to the extraction of compounds in porous and loose solid substances and oil materials; supercritical CO2 is particularly sensitive to changes in operating conditions (such as pressure, temperature, etc.), This provides flexibility and adjustability in operation; supercritical CO2 has the solubility of a solvent, and can meet stringent requirements such as low temperature, non-toxicity, and no solvent residue, which is especially suitable for the food industry. The following is a comparison of supercritical foaming equipment technology and traditional foaming technology:

1. Disadvantages of traditional foam sheet technology: 1. Butane foaming: Butane gas is explosive, so the investment cost of the production line is high. The cost of butane is high; 2. CFC (chlorofluorocarbon) foaming: CFC destroys the ozone layer; 3. Using butane and chlorofluorocarbons for foaming, it is not easy to adjust and control the size of the foam cells; 4. Chemical medium : The chemical medium is expensive to use, toxic, and cannot be recycled. The European Union and the United States have legislated to prohibit the use of chemical media for foaming.

2. Supercritical foaming equipment The advantages of foaming sheet technology: 1. Environmental protection technology 2. Low equipment investment 3. Low operating cost 4. It is easy to adjust and control the size of the foamed pores.

3. The difficulty of carbon dioxide foaming technology is to control the equal amount of carbon dioxide gas supply. Factory supply Supercritical foaming equipment has mature carbon dioxide gas supply technology to ensure stable and continuous gas supply, so the size of foaming pore size is uniform, which ensures the quality of foaming.
 

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