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Lester Populaire
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Group: Forum Members
Posts: 311,
Visits: 13K
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+x+x+xGot very little to do with the film, and everything to do with technique. Softer films can be easier to use, but they are also easier to puncture, so it's a trade off. But you should not have to rely on the bag stretching to solve bridging, so I prefer to have a more rugged bag that you can push into the corners with as much force as you need and worry less about putting a hole in it. The film's that EC supply are a great option, they are relatively soft but but still quite tough. I kinda disagree here as i had way more trouble with leaky bags with rigid films that then like to crease and when you push that crease around it can damage the film. Loved the strechlon 200 but didn't work with it for years now due to availability as well. I am surprised that you have had problems with, I assume, EC vacuum bags. I have given them a fair amount of abuse and the only problem has been very sharp mould edges which are quickly solved with bagging tape. No wasn't Easycomposites bags Was mostly when working at clients workshops and have seen a couple of weird bags.
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Steve Broad
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Group: Forum Members
Posts: 408,
Visits: 4.1K
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+xYeh EC are great. Super easy, and their pricing is rock solid - even for me in Aus paying the horrendous exchange rate and freight. If I was in Europe, I would get everything from them too. I am surprised that there isn't a comparable supply company in the colony..... :-)
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Steve Broad
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Group: Forum Members
Posts: 408,
Visits: 4.1K
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+x+xGot very little to do with the film, and everything to do with technique. Softer films can be easier to use, but they are also easier to puncture, so it's a trade off. But you should not have to rely on the bag stretching to solve bridging, so I prefer to have a more rugged bag that you can push into the corners with as much force as you need and worry less about putting a hole in it. The film's that EC supply are a great option, they are relatively soft but but still quite tough. I kinda disagree here as i had way more trouble with leaky bags with rigid films that then like to crease and when you push that crease around it can damage the film. Loved the strechlon 200 but didn't work with it for years now due to availability as well. I am surprised that you have had problems with, I assume, EC vacuum bags. I have given them a fair amount of abuse and the only problem has been very sharp mould edges which are quickly solved with bagging tape.
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Hanaldo
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Group: Forum Members
Posts: 2.5K,
Visits: 28K
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Yeh personal preference will play a big part in it, everyone has their materials that they like to use. There's advantages and disadvantages to all of them, and no real 'best' solution.
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Lester Populaire
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Group: Forum Members
Posts: 311,
Visits: 13K
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+xGot very little to do with the film, and everything to do with technique. Softer films can be easier to use, but they are also easier to puncture, so it's a trade off. But you should not have to rely on the bag stretching to solve bridging, so I prefer to have a more rugged bag that you can push into the corners with as much force as you need and worry less about putting a hole in it. The film's that EC supply are a great option, they are relatively soft but but still quite tough. I kinda disagree here as i had way more trouble with leaky bags with rigid films that then like to crease and when you push that crease around it can damage the film. Loved the strechlon 200 but didn't work with it for years now due to availability as well.
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Hanaldo
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Group: Forum Members
Posts: 2.5K,
Visits: 28K
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Yeh EC are great. Super easy, and their pricing is rock solid - even for me in Aus paying the horrendous exchange rate and freight. If I was in Europe, I would get everything from them too.
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Steve Broad
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Group: Forum Members
Posts: 408,
Visits: 4.1K
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+xGot very little to do with the film, and everything to do with technique. Softer films can be easier to use, but they are also easier to puncture, so it's a trade off. But you should not have to rely on the bag stretching to solve bridging, so I prefer to have a more rugged bag that you can push into the corners with as much force as you need and worry less about putting a hole in it. The film's that EC supply are a great option, they are relatively soft but but still quite tough. Everything I use, except prepreg, comes from EC. As you say, their bagging material if pretty tough.
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Hanaldo
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Group: Forum Members
Posts: 2.5K,
Visits: 28K
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Got very little to do with the film, and everything to do with technique. Softer films can be easier to use, but they are also easier to puncture, so it's a trade off. But you should not have to rely on the bag stretching to solve bridging, so I prefer to have a more rugged bag that you can push into the corners with as much force as you need and worry less about putting a hole in it.
The film's that EC supply are a great option, they are relatively soft but but still quite tough.
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BoB_from_jungle
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Group: Forum Members
Posts: 7,
Visits: 54
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+xWhen I first started playing with infusion, I experimented with the stretchy films and it was a nightmare for all the reasons mentioned. Worst was that the infusion would seem ok then suddenly the bag would burst. I found out the bag was going into the open side of the silicone connector then starting to stretch to try and fill the void under the silicone and would keep stretching until it burst. Not to mention the bag stretching over cut mesh edges and slowly bursting and leaking there during the infusion! Warren, can you tell me the following Do I need carefully choose the vacuum bag to avoid vac bag bridging or the effect of the vac bag is too small and don't have influence on it? The process is vac infusion Is there any difference between using for example Securlon 500 (elongation at break 350 %) and Securlon L 1000 (500 % at break)? I guess if I want to avoid bridging at the same condition Securlon L 1000 will be better. What do you think?
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Hanaldo
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Group: Forum Members
Posts: 2.5K,
Visits: 28K
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+x+x+x+x+xOh, apologies, you're correct. Looks like they don't carry it anymore. Didnt notice when it got dropped! Yes, unfortunately we haven't carried it for a couple of years now; we dropped it at about the same time as the silicone coated release ply when we moved over the the VB160 and VB200 that we stock now. I don't know where you'd get a small amount though nowadays unfortunately. Why did you drop it? With a 500% stretchability it seems to be great stuff. There is even a version that appears to be able to withstand oven temperatures. What are the downsides? It's not as useful as it promises. If you know how to make a vacuum bag with regular bagging film, then those films are tougher and much easier to work with. Strechlon sticks to epoxy, it punctures very very easily, it doesn't stick well to bagging tapes, and it has various issues with infusion etc. About the only thing I have had much use for it with is vacuum bonding. So, no real issues, then :-) No not at all, it is a commercial product used by professionals all over the world for a reason. If it was inherently flawed with defects then it would not be. I just found it not very reliable, and not as useful as a basically infinitely stretchy bag seems on paper, and so never bought any more of it. I'd say a lot of EC's customers came to the same conclusion, and it got dropped from the line-up.
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