First of all scrim is just part of a carbon fiber per preg material. It can consist of graphite or fiberglass, possibly other materials as well but those are the common ones.
The fiber is made in factories all over the world. Then the fibers are sent to other factories to be laid up in sheets, combined with the resins and the scrim and put on rolls to become the raw material.
Many of these lay up plants are in the USA. But I imagine China and other countries do it as well.
These prepreg materials however are subject to drying out and must be kept frozen so pre pregs are usually used close to the manufacturing site.
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.
A forum community dedicated to Spey casting, fishing, flies, and enthusiasts. Come join the discussion about trails, licenses, fishing, game laws, styles, reviews, optics, accessories, classifieds, and more!