Easy & vari-preg use with UDs & Nomex

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Easy & vari-preg use with UDs & Nomex

Author	Message
brainfart	brainfart posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 198, Visits: 1.4K	Epoxy isn't polyester. There is no smell issue, certainly not when infusing. If that Gurit stuff is low temp curing you could most likely use it together with the Easypreg.
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wozza	wozza posted 10 Years Ago Post Details
Group: Forum Members Posts: 688, Visits: 5.4K	I have to admire your confidence. It's an ambitious project and will require an equally ambitious budget. Not knowing the difference between polyester and epoxy resins suggests more research is needed. Good luck, Warren Carbon Copies Ltd
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ChrisR	ChrisR posted 10 Years Ago Post Details
Group: Forum Members Posts: 363, Visits: 3K	Guys, I'm not sure where the confusion is? I've used polyester infusion resin before so I don't think he is confusing resins.
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wozza	wozza posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 688, Visits: 5.4K	Perhaps I have misunderstood. From the outset weight and strength have been the criteria. Fumes from polyester were quoted as reasons for not using infusion. Why would you want to use polyester given all its disadvantages? Warren. Carbon Copies Ltd
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ChrisR	ChrisR posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 363, Visits: 3K	Quite a few marine builders still use poly resin as they know how it works from the old CSM & wet lay days. (And it's cheaper) Also, don't forget one of the primary benefits of using poly resins is the fast cure time and people don't tend to get reactive to poly resins like you do with epoxy Edit: the suggestion that he doesn't want to use infusion because of the fumes looks to be because he is planning on doing it at home in the garage (so it may attach to the house and with winter coming you're not going to have the doors open!) Personally, I think epoxy infusion is probably the best way forward but I also wouldn't exclude OOA prepreg (although prepreg will be more expensive and as stated has a few other issues with larger projects) - A lot of large area composites infuse (large boats, wind turbine blades etc.) so I'm sure they have done a lot more research on it and have decided that infusion is the best method for the application. One thing to note, with OOA prepreg you still need to debaulk at regular intervals - most datasheets recommend after the 1st layer then after subsequent 2/3 layers and some even have a low temp debaulk to help things along. This all adds to the time and cost of the project with more consumable materials. Edited 10 Years Ago by ChrisR
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wozza	wozza posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 688, Visits: 5.4K	ChrisR (23/10/2014) Quite a few marine builders still use poly resin as they know how it works from the old CSM & wet lay days. (And it's cheaper) Also, don't forget one of the primary benefits of using poly resins is the fast cure time and people don't tend to get reactive to poly resins like you do with epoxy You can't get much more expensive than prepreg taking everything into account which is what he is wanting to use. Your not going to get a strong lightweight hull using poly even using infusion. In my opinion/experience Carbon Copies Ltd
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Matthieu Libeert	Matthieu Libeert posted 10 Years Ago Post Details
Group: Forum Members Posts: 955, Visits: 3.4K	I'm following warren and ChrisR on this one, A lot of companies doing big parts still use infusion. Using prepreg isn't like using a carbonfiber sticker you can easily apply and move on, you have to be very careful in the lay up, and it can take you some time. sometimes I'm working more than one hour on a small 30cm by 20cm part to get everything correct, cutting the prepreg templates can be time consuming, the lay up can take a lot of time, then you need to debulk and bag under a perfect vacuum without any air leak. But I wont say its impossible and its good that you are dedicated to do it that way! Keep us updated on the progress once you start! Best of luck Matthieu Libeert Founder MAT2 Composites X Sports website: www.mat2composites.com
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wozza	wozza posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 688, Visits: 5.4K	So far there has been no mention of moulds. Making moulds of this size suitable for prepreg or infusion for that matter will be costly, especially given that your basement workshop prevents the use of polyester. Carbon Copies Ltd Edited 10 Years Ago by wozza
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