Back in the day
80's as I recall, I did some contracting work on pre preg machinery for U.S. Polymeric, a division of Hitco. After the material came off the pre preg machine it was put into cold storage until shipped out to the customer. We had a whole order returned because of freezing. Somehow moisture got between the layers of those rolls of material, and when it froze, it expanded, causing separation and breakage.