This is what I found according to http://www.ice-fishing-source.com/ice-fishing-equipment-gear.asp :
Ice Fishing Line
The line you spool on your reels for winter fishing is different then you would in the summer. Ice fishing line is specifically designed to stay supple and keep from freezing in cold weather.
Monofilament lines are still the most popular. Berkley Trilene Micro Ice and Stren Ice Gold line are both good bets.
Newer Superlines like Berkley FireLine can be twice as strong as Monofilament and have a thinner diameter. They have virtually no stretch and are mostly used for jigging in deep water.
For Tip-ups I put on a black Teflon coated line that doesn’t tangle and can be easily seen on the snow.