raiki Posted April 18, 2008 Share Posted April 18, 2008 Ok proof is probably not the right word but read on. I have done some research, looking at datasheets and a heap of texts on fiberglass and so forth. With all the data avaiable I have produced the attached PDF which shows a comparison to Hexcel 7725/Integlas 92125 and Hexcel 7715/Interglas 92145. Given the data shown I think the Interglas is definately a suitable alternative, which should help anyone building outside the US. One thing you might be concerned about when looking at the data is the warp count of both the Interglas fabrics are MUCH lower than the equivalent Hexcel. What you need to know here is that the interglass "threads" are made up of multiple strands. For example the BID: The Hexcel has 21 threads/cm whereas the Interglas only has 7. However the Interglas fibre is EC9-68x3 which means each major thread contains 3 strands. 7x3 = 21. Also I only show one strength measurement, which I believe is tension. I figured there wasn't a lot of point looking for further data when the tension strength is very similar and the glass construction is basically the same from the same type of glass. I figure all other mechanical properties are going to be very similar. One other thing I am concerned about is that the 7725 uses an 11 micron glass at a 204g weight and the Interglas uses a 9 micron fiber that has the same 204g weight. I don't know why two glass fibers of the same material but different diameters can have the same weight (given about a 40% volume difference???? This is in the Fill yarn (sideways). Either way the tension strength in that direction is as good (actually better) than the Hexcel. The fill yarn is also slightly different on the UNI but I am not concerned about that because we dont rely on strength in that direction in the UNI. Please do your own research but given what I have heared from others over the years and this data, I think Interglas is perfectly suitable. Whether or not you intend looking at alternatives, this was a good educational experience for myself learning about the material that we are all betting our lives on (fiberglass in general). I'd suggest others do some research for the same reason. http://www.canardzone.com/forum/attachment.php?attachmentid=1598&stc=1&d=1208513507 Quote Adrian Smart Cozy IV #1453 Link to comment Share on other sites More sharing options...
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