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#1
posted to rec.boats.building
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Glue thickness?
Ulrich G. Kliegis wrote:
I am building a new hatch lid from two 4mm ( ~1/6"") sheets of marine ply. Reinformcement structures will follow. My question here is: How much glue (epoxy resin plus cotton fibres as thickener) is the optimum? My felt guess is 0.1 to 0.2 mm, i.e. ~1/240 to 1/120". Less is hardly possible, more? The curvature is about 15 mm elevation in the middle of a width of 600 mm. Cheers, and TIA, U. if you clamp too tightly you will squeeze the epoxy out and the joint will fail. paul - progressive epoxy polymers inc. |
#2
posted to rec.boats.building
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Glue thickness?
On Fri, 05 Mar 2010 11:35:22 -0500, Paul Oman
wrote in rec.boats.building: if you clamp too tightly you will squeeze the epoxy out and the joint will fail. That's why I apply thickener. Enough pressure to achieve the bend and the closure of any gaps, but not too much to press it all out. My question just aims at the amount I should apply. Too much is bad, too little too. Thanks for your comment! U. |
#3
posted to rec.boats.building
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Glue thickness?
In article ,
diesemailadressevonUlliistzwaretwaslangabersieistt rotzdemgueltig@kliegis ..de says... On Fri, 05 Mar 2010 11:35:22 -0500, Paul Oman wrote in rec.boats.building: if you clamp too tightly you will squeeze the epoxy out and the joint will fail. That's why I apply thickener. Enough pressure to achieve the bend and the closure of any gaps, but not too much to press it all out. My question just aims at the amount I should apply. Too much is bad, too little too. Thanks for your comment! U. As far as thickner the old guy I used to deal with always told me thickener is not Epoxy. Use it to keep Epoxy in place, but don't over use it, as it is not as strong as Epoxy... Scotty -- For a great time, go here first... http://tinyurl.com/ygqxs5v |
#4
posted to rec.boats.building
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Glue thickness?
On Mar 21, 11:49*am, wrote:
In article , diesemailadressevonUlliistzwaretwaslangabersieistt rotzdemgueltig@kliegis .de says... On Fri, 05 Mar 2010 11:35:22 -0500, Paul Oman wrote in rec.boats.building: if you clamp too tightly you will squeeze the epoxy out and the joint will fail. That's why I apply thickener. Enough pressure to achieve the bend and the closure of any gaps, but not too much to press it all out. My question just aims at the amount I should apply. Too much is bad, too little too. Thanks for your comment! U. As far as thickner the old guy I used to deal with always told me thickener is not Epoxy. Use it to keep Epoxy in place, but don't over use it, as it is not as strong as Epoxy... Scotty -- For a great time, go here first...http://tinyurl.com/ygqxs5v Fortunately, no one on this NG has seen your front yard....littered with half-done projects that look like ****. Paid off that $25,000 Hospital Bill yet? I cant wait till your "heart condition" worsens, and your left on a Gurney in the hallway, because you STIFFED the Hospital. You must have survived quite a few nightly ass ****s from your dead daddy, to be such a scumbag. Die, mother ****er. |
#5
posted to rec.boats.building
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Glue thickness?
Too bad there is not an age limit on newsgroup posting. Say like, you
have to be at least 14 years old to post? Fortunately, no one on this NG has seen your front yard....littered with half-done projects that look like ****. Paid off that $25,000 Hospital Bill yet? I cant wait till your "heart condition" worsens, and your left on a Gurney in the hallway, because you STIFFED the Hospital. You must have survived quite a few nightly ass ****s from your dead daddy, to be such a scumbag. Die, mother ****er. |
#6
posted to rec.boats.building
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Glue thickness?
On Mar 21, 1:50*pm, Gordon wrote:
* *Too bad there is not an age limit on newsgroup posting. Say like, you have to be at least 14 years old to post? Fortunately, no one on this NG has seen your front yard....littered with half-done projects that look like ****. Paid off that $25,000 Hospital Bill yet? I cant wait till your "heart condition" worsens, and your left on a Gurney in the hallway, because you STIFFED the Hospital. You must have survived quite a few nightly ass ****s from your dead daddy, to be such a scumbag. Die, mother ****er. Here's the snotty, slimy little ****s picture. http://i539.photobucket.com/albums/f...11/pocono1.jpg How many late night ass ****ings did you survive to turn out looking like a Woman? Who's the dude sitting next to you? Find him in the Mens Washroom? |
#7
posted to rec.boats.building
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Glue thickness?
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#8
posted to rec.boats.building
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Glue thickness?
On Fri, 5 Mar 2010 12:46:35 -0500, I am Tosk
wrote in rec.boats.building: Well, if you listen to the Old School guy I used to work with he would say, you don't goo wood to wood. Put a layer of cloth in there and use the epoxy to fill the glass... An interesting thought. Never heard that before, but it looks like it makes sense - although my work here is just a hatch lid, not an icebreaker bow... But... Will have to think about it. And then, wet in wet? Thanks for that inspiring idea! Cheers, U. |
#9
posted to rec.boats.building
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Glue thickness?
Paint each side of dry wood with unthickened epoxy so it will be absorbed.
Wait a few minutes but don't let it cure. Then put a thin layer of thickened epoxy and clamp just tightly enough to achieve the shape you need and to mimimize any gaps. The thickened epoxy is just a gap filler and the gaps are supposed to be very minor. If the gaps are too large then the epoxy would form hard spots. I'd use fumed silica for thickener. The thicker you make it the faster it cures - can be too fast to work with so thicken only enough so it doesn't run and will act like a gap filler. |
#10
posted to rec.boats.building
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Glue thickness?
On Fri, 05 Mar 2010 19:30:36 GMT, Reno wrote in
rec.boats.building: Paint each side of dry wood with unthickened epoxy so it will be absorbed. Wait a few minutes but don't let it cure. Reno, thanks. I made the sandwich just two hours before, and, maybe that looked a bit unclear, I did not do such work for the first time. But after having had some mess aroudn the workpiece after applying far too much some time ago, another time woo little, I wanted to approach it in a more deterministic way this time. So, I calculated the amount of resin for a layer of 0.2mm thickness, added some 10% for the soaking of the surfaces, and did it then exactly like you said - first "priming" both surfaces (after carefully cleaning them)with unthickened resin (West 105 resin, 206 hardener to achieve more pot time), then thickened the remaining about 80% of the mixed epoxy with cotton fibres and fillet blend fibres until the stuff had a marmelade-like consisistence, then spread that with a piece of hardfibre board over one surface, trying to get a pretty even distribution. Prior, we had scaped two thick pieces of timber exactly to the needed curvature. The two layers were put togehter after adjusting the positions exactly, and then clamped to the templates, using strips of thick timbers to press the layers down evenly. Almost everywhere, the glue protruded a bit from between the layers, showing that the pressure seemed to be distributed evenly enough. Now the glue cures til tomorrow, then I'll use the same templates to glue a supporting reinforcement frame. Thanks for all your comments, and Paul, I'll try the cloth layer method some time! Cheers, U. |
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