Heres some very good information from a post on Ifish, a few months back.
Posters name Vhawk
A Home Test of '10 pound test' Monofilament and Mono Hybrid Fishing lines For Breaking Strength, and Retained Strength Post-Failure.
ABSTRACT
This line study was done in order to compare the relative strength of nylon, and nylon hybrid fishing lines; As well as the capacity of those lines to retain strength after being stretched to failure. The experiment involved tying each end of a 36 inch section of line, rated as "10 pound test", to an 8/0 trolling hook, using a Palomar knot, one hook was attached to a static point, the other hook was attached to a hand held/hand pulled digital scale. Lines were pulled until failure, highest recorded weight prior to line failure was recorded. Test repeated with longest sample of failed line in order to test retained strength. Test was repeated 5 times per line, with lowest result being tossed out. In general, lines with larger diameters, were able to tolerate greater tension. Initial diameters had no effect on retained strength. Although not objectively measured, fluorocarbon/mono hybrid lines seemed to have the least amount of stretch, and the lower diameter lines seemed to have the greatest amount of stretch. Further experiments should include improving the mechanism by which tension is applied to the lines, increases in number of tests in order to a more accurate overall result, and measurement of elasticity.
INTRODUCTION
These tests were conducted to provide some objective data to compare some of the multitude of fishing lines available to the modern angler. Although other consumptive outdoor activities are rigorous in the testing of their equipment, i.e. self loading hunters, bowhunters, there is little nonbiased information available comparing equivalent pound test lines. This experiment provides as starting point for both data collection, as well as a starting point for development of a methodology that is affordable, and of practical use in a private home, or garage.
METHODS
Materials:
20 foot sections of line, marked as "10 pound test", were obtained from Verles Marine Supply in Shelton (Tell them thanks), and Sportsmen Warehouse in Lacey. A new Lymann stainless steel dial caliper, 0.001" was used to measure line diameters. A new Rapala hand held digital scale, 50 pound capacity was used to measure tensions. 2 double 8/0 stainless steel trolling hooks were used to attach the tag ends of the line. Generic distilled water was used to soak lines prior to testing.
Procedure:
36 inch section of lines were measured by caliper for actual diameter at each tag end, and center of segment. Results were averaged for reported result. The lines were then individually soaked for 45 minutes in distilled water. Distilled water being used to avoid problems with cholorine affecting the lines. Lines were then tied using a Palomar knot as shown in Practical Fishing Knots II to each of the hooks. One hook was attached to a chair leg, the other was attached to the hook on the scale. The scale was then pulled, rate of tension was increased by about one pound for each 3 second count, constant observation of meter was made until line broke. Highest reading was recorded. Longest section of line was retrieved, 4 inches off broken tag end was clipped, line retied to hook, and procedure repeated. This was done 5 times for each line. Lowest result dropped.