KELPkid From United States of America, joined Nov 2005, 5962 posts, RR: 4 Reply 1, posted (3 years 6 months 5 days 16 hours ago) and read 2384 times:
You know, my wife made our Thanksgiving turkey dinner in a plastic bag that baked in an oven all afternoon at 350 degrees Farenheit, and the turkey came out delicious (nice and moist), and no one in our immediate family fell sick from poisioning... The point being that, there are some plastics that can take high temperatures...
Celebrating the birth of KELPkidJR on August 5, 2009 :-)
Trex8 From United States of America, joined Nov 2002, 3979 posts, RR: 14 Reply 3, posted (3 years 6 months 5 days 15 hours ago) and read 2344 times:
Quoting Prebennorholm (Reply 2): Dear Trex8, there are some basic CFRP production techniques which you need to study. You can easily find it with google.
thanks, so do the 787 parts get baked at the low temps I found googling, 120 deg C , or at the much higher ones - some were up to 250+
Nomadd22 From United States of America, joined Feb 2008, 1577 posts, RR: 0 Reply 4, posted (3 years 6 months 5 days 14 hours ago) and read 2326 times:
Nice article, but the first caption "When it's finished, the 787, also known as the Dreamliner will fly further on less fuel than any existing jet" kinda makes you wonder just how stupid a reporter can be.
Stitch From United States of America, joined Jul 2005, 26952 posts, RR: 83 Reply 5, posted (3 years 6 months 5 days 12 hours ago) and read 2284 times:
Quoting Trex8 (Reply 3): so do the 787 parts get baked at the low temps I found googling, 120 deg C , or at the much higher ones - some were up to 250+
It's actually around 200°C / 400°F for the 787's parts.
Not all plastics melt at low temperatures. Depending on the specific polymer, thermoplastics can go up above oven temperatures, and thermoset plastics don't melt at all (they just eventually burn).
Quoting Trex8 (Reply 3): thanks, so do the 787 parts get baked at the low temps I found googling, 120 deg C , or at the much higher ones - some were up to 250+
Prepreg aerospace composites normally cure at 350 degF.
Different epoxy compounds together with various fabrics along with the use of the part, its location on the airframe and its intended lifespan all call for different curing rates and temperatures. Some components are CFRP's, others are a matrix of carbon , Kevlar and fiberglass while still, some are just fibreglass. Many different resins along with fillers, aluminum powder, all add to the complexity of cure rates. Composites are such a science that in my personal opinion, its an artform. You also don't need an autoclave to create all the parts...just a mold and vacuum bag. Look up "Heatcons" Website and read about this...its interesting reading. Pretty amazing when you consider you mix two liquids, part A and part B epoxy, impregnate fabric off a roll, bake, and out pops a 787!...although grossly simplistic...thats sort of what is happening...
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From United States of America, joined Nov 2002, 3979 posts, 
The point being that, there are some plastics that can take high temperatures...
From Denmark, joined Mar 2000, 6039 posts, 
From Canada, joined Jan 2006, 12709 posts, 
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