Polyurethane foaming technology is actually a technology to produce polyurethane foam. Nowadays, this kind of foam can be used in many fields,
When selecting a foaming machine for polyurethane (PU) foam production, there are several crucial factors to keep in mind:
Usually, in the sponge production process, we encounter foaming issues such as rapid foaming, overly large sponge pores, and a lack of fineness.
The occurrence of polyurethane foam defects during the foaming process can be attributed to various factors, including both chemical and mechanical aspects. The foam defects, general causes, and the solutions are summarized as follows:
What should you pay attention to when using a sponge foam production line to foam? Here are some suggestions from us:
Low-density polyurethane (PU) sponge foam, with a density below 18 kg/m³, faces a significant challenge in heat dissipation during production, particularly when the water-to-polyol ratio exceeds 4.5 parts per 100 parts of polyether polyols, and TDI (Toluene Diisocyanate) usage surpasses 55 parts. The limited heat dissipation within the foam can result in temperatures exceeding 180°C during the foaming process, posing a severe risk of self-ignition and potential fire hazards.
Polyurethane foaming is a process that uses isocyanates and polyether polyols as the main raw materials, with the assistance of various additives such as foaming agents, catalysts, flame retardants, and more. This process involves mixing these components using specialized equipment and then foaming them in situ under high pressure to create high molecular weight polymers.
The following are descriptions and suggestions of the physical properties of polyurethane foam. Hope the foaming tips can help to solve some of your problems during the foaming process.
A polyurethane (PU) foaming machine comprises several distinct components, each serving a specific function:
Before commencing the production of polyurethane foam, it is crucial to prepare the necessary raw materials in accordance with the desired foam characteristics. These materials encompass polyol compounds (polyether), polyisocyanate compounds (TDI, MDI), catalysts, stabilizers, surfactants, foaming agents, and flame retardants.
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