PSI Kolkata

  " Micanite " is an old name. Older than most of the equipment it's still used in. And yet, thirty years into making this material, we still get more calls asking about micanite sheet than almost anything else we manufacture - because when something has to survive real, sustained heat, nothing else has quite managed to replace it. If you've been told to swap it out for a "modern" synthetic board, read this first. We'll walk through what micanite sheet actually is, where it earns its keep, and how to pick the right one - in plain language, not a spec sheet. What Micanite Sheet Actually Is Micanite isn't one single material - it's a rigid board made by pressing together layers of natural phlogopite mica paper, bonded under heat and pressure. The old-school version used shellac to bond the layers. The version we make at PSI uses silicone resin instead, which is the change that lets it handle far more heat, for far longer, than the material could ...

  If you've spent any time around motors, transformers, or heaters, you've probably heard someone say "just use a mica sheet" without ever explaining why. So let's actually explain it - in plain language, no jargon dump. We've been making mica sheets at PSI for thirty years now, and if there's one thing that hasn't changed in three decades, it's this: most insulation failures don't happen because someone picked the wrong material. They happen because nobody explained what the numbers on the datasheet actually mean for the job at hand. This guide fixes that. What a Mica Sheet Is, in Plain Words Mica is a natural mineral that splits into thin, flat layers - and those layers happen to be excellent at two things: blocking electricity and resisting heat. A mica sheet takes that raw material and turns it into something you can actually use - a flat, workable insulation board or roll that sits inside motors, transformers, switchgear, and heaters to k...

  A lot of attention has gone into 4680 battery cells over the last few years, and honestly, it's easy to see why. They store more energy, reduce the number of cells needed inside a battery pack, and help manufacturers squeeze more performance out of the same space. For EV makers chasing longer range, that's a pretty attractive package. But every battery engineer knows there's another side to the story. The more energy you pack into a cell, the more important it becomes to control what happens when something goes wrong. And that's where thermal propagation enters the picture. If you've ever seen footage of a battery fire, you've probably noticed that it rarely stays confined to a single cell. One cell overheats, the neighboring cell gets hotter, then another follows. Before long, the issue has moved well beyond the original failure point. With larger-format cells like the 4680, that risk becomes harder to ignore. Because each cell stores more energy, a failure e...