How do those self-inflating packing sheets work? The ones where you remove them from a spool and they piff up automatically?

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How do those self-inflating packing sheets work? The ones where you remove them from a spool and they piff up automatically?

In: Chemistry

They have two different chemicals in them. You pop the inner package and they mix. The reaction causes gas to form expanding the package. They also produce a little heat.