In various industrial and manufacturing processes, there is a sheer need of polyurethane resin impregnation – a simple process of filling any porous material (or surface) with polyurethane resins and make it impervious. This process helps a lot in addressing problems related with micro porosity in metal castings, powder-metal parts, electronic components, plastic composites, welds, and other porous substrates – if left untreated, and then it may result in pressure leakage and poor quality of surface finish. This brings an urgent need of a much-popular resin impregnation technology that treats any type of these porous problems and improvements their potential while including leak-free performance.
Before we go any further, let's understand more about Polyurethane Resin Impregnation line technology. It is one of the most common methods used to seal the cavities and voids between the winding of the wires, which obviously result in better electrical insulation. The impregnation also helps in reducing vibrations by simply fixing the wires around the windings. In the layman terms, it is a standard way to avoid leakage of the components, and upgrade the surface treatment.
In this approach, Polyurethane (PUR and PU) polymers are used as resin blend to seal the open pores. There is no secret that it is the "resin of choice" when it comes to electrical potting compounds, surface coatings, surface sealants and high performance adhesives. They are valued for their properties as a resin. Temperature, vacuum, and pressure are the primary parameters used in Polyurethane impregnation processing. Give maximum attention to the proper viscosity, as otherwise improper viscosity may lead to incomplete saturation and stress cracks.
Polyurethane impregnation approach has a number of advantages. Let's take a look at some major benefits of the same: –
– Accurate penetration of resin deep into various existing gaps
– No presence of bubbles in the resin-winding mass
– To create a bonding effect on the lamination
– High bond strengths
– No resin residuals on shafts and laminations
– Better electrical insulation with minimize vibrations
– Increase in thermal conductivity
The most widely used equipment for Polyurethane Resin Impregnation are Trickling, Roll Dip, Hot Dipping, and vacuum potting. You can easily find a myriad number of choices available in the market for them. However, what is important is choosing the right machine from the right dealer.
When planning to buy an impregnation machine, you should give utmost importance to factors like energy optimization, great yield of resin, programmable auto start and shut down, automatic flushing of pumps and drippers, automatic lubrication of the system, automatic diagnostics for failures, low thermal dissipation, easy operation, low maintenance and more. Do not forget to check the quality, specification and manufacturer's warranty before making the final purchase. Good luck!