Expanding packaging foam - GIF
Expanding packaging foam. Chemical reaction between polymeric isocyanate and polyurethane resin causes the foam to expand inside the bag.
<video controls autoplay loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/expanding_packing_foam.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
Previously:
https://www.homemadetools.net/forum/...282#post126787
https://www.homemadetools.net/forum/...148#post126072
https://www.homemadetools.net/forum/...450#post107482
https://www.homemadetools.net/forum/...541#post132323