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#1
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Plexiglas cement??
I am planning a "touchy" repair job to my canopy. I've done some test
sheet acrylic bondings with acrylic IPS Weld-On (#16). I don't like the ugly bubbles and noticed some fine plexiglas stress cracking on one test piece. Is there another sort of cement (eg. Weld-On #40) which would make for a better looking bond between 2 sheets of .080 in plexiglas? Thanks. Larry |
#2
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Plexiglas cement??
On Sun, 04 Nov 2007 21:09:01 -0800, Larry wrote:
I am planning a "touchy" repair job to my canopy. I've done some test sheet acrylic bondings with acrylic IPS Weld-On (#16). I don't like the ugly bubbles and noticed some fine plexiglas stress cracking on one test piece. Is there another sort of cement (eg. Weld-On #40) which would make for a better looking bond between 2 sheets of .080 in plexiglas? Thanks. Larry isnt chloroform a thin solvent suited to wicking into plexiglas cracks? Stealth Pilot |
#3
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Plexiglas cement??
On Nov 5, 2:37?am, Stealth Pilot
wrote: On Sun, 04 Nov 2007 21:09:01 -0800, Larry wrote: I am planning a "touchy" repair job to my canopy. I've done some test sheet acrylic bondings with acrylic IPS Weld-On (#16). I don't like the ugly bubbles and noticed some fine plexiglas stress cracking on one test piece. Is there another sort of cement (eg. Weld-On #40) which would make for a better looking bond between 2 sheets of .080 in plexiglas? Thanks. Larry isnt chloroform a thin solvent suited to wicking into plexiglas cracks? Stealth Pilot Stealth: Yes it is but my repair patch is not a perfect match due to curved surface so some air pockets would prevent complete wicking. I thought maybe a thicker solvent could possibly work better. It is not a structural requirement. Thanks Larry |
#4
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Plexiglas cement??
On Nov 5, 7:37 am, Larry wrote:
On Nov 5, 2:37?am, Stealth Pilot wrote: On Sun, 04 Nov 2007 21:09:01 -0800, Larry wrote: I am planning a "touchy" repair job to my canopy. I've done some test sheet acrylic bondings with acrylic IPS Weld-On (#16). I don't like the ugly bubbles and noticed some fine plexiglas stress cracking on one test piece. Is there another sort of cement (eg. Weld-On #40) which would make for a better looking bond between 2 sheets of .080 in plexiglas? Thanks. Larry isnt chloroform a thin solvent suited to wicking into plexiglas cracks? Stealth Pilot Stealth: Yes it is but my repair patch is not a perfect match due to curved surface so some air pockets would prevent complete wicking. I thought maybe a thicker solvent could possibly work better. It is not a structural requirement. Thanks Larry Acrifix 192 is a good material for this. It is fairly viscous and can be worked just like the plexi when it's cured. It is UV cured. Most of the sailplane online stores will carry it (Knauff & Grove, Wings & Wheels, Cumulus, etc.) Craig |
#5
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Plexiglas cement??
On Nov 4, 9:09 pm, Larry wrote:
I am planning a "touchy" repair job to my canopy. I've done some test sheet acrylic bondings with acrylic IPS Weld-On (#16). I don't like the ugly bubbles and noticed some fine plexiglas stress cracking on one test piece. Is there another sort of cement (eg. Weld-On #40) which would make for a better looking bond between 2 sheets of .080 in plexiglas? Thanks. Larry #16 is just the water thin #3 with acrylic dust pre-dissolved in it to make it thick, it's still the same action, I.E. softening the existing acrylic, then evaporating away. If you have gaps in particular, #40 is the shizz you want. It actually is syntesizing new, full strength acrylic, and not just softening up your substrate. Years ago, I built a planing boat towing tank model out of acrylic sheet, and #40 worked far better than the Methyl Chloride solvent cements, gaps and all. Once cured, it works just like the base material, and polishes up nice. It can be a little different tint, it's not quite as gin-clear. |
#6
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Plexiglas cement??
Chloroform would probably work, but I think you mean methylene chloride.
David Stealth Pilot wrote: On Sun, 04 Nov 2007 21:09:01 -0800, Larry wrote: I am planning a "touchy" repair job to my canopy. I've done some test sheet acrylic bondings with acrylic IPS Weld-On (#16). I don't like the ugly bubbles and noticed some fine plexiglas stress cracking on one test piece. Is there another sort of cement (eg. Weld-On #40) which would make for a better looking bond between 2 sheets of .080 in plexiglas? Thanks. Larry isnt chloroform a thin solvent suited to wicking into plexiglas cracks? Stealth Pilot |
#7
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Plexiglas cement??
On Nov 5, 1:26?pm, flybynightkarmarepair wrote:
On Nov 4, 9:09 pm, Larry wrote: I am planning a "touchy" repair job to my canopy. I've done some test sheet acrylic bondings with acrylic IPS Weld-On (#16). I don't like the ugly bubbles and noticed some fine plexiglas stress cracking on one test piece. Is there another sort of cement (eg. Weld-On #40) which would make for a better looking bond between 2 sheets of .080 in plexiglas? Thanks. Larry #16 is just the water thin #3 with acrylic dust pre-dissolved in it to make it thick, it's still the same action, I.E. softening the existing acrylic, then evaporating away. If you have gaps in particular, #40 is the shizz you want. It actually is syntesizing new, full strength acrylic, and not just softening up your substrate. Years ago, I built a planing boat towing tank model out of acrylic sheet, and #40 worked far better than the Methyl Chloride solvent cements, gaps and all. Once cured, it works just like the base material, and polishes up nice. It can be a little different tint, it's not quite as gin-clear. Hello Above: Was talking with Ridout plastic techs yesterday. They warned me about possible stress fracture when cementing plexiglas that is not "cast cured". In other words plexiglas that is "extruded" has stress in it and many solvents will cause hair line stress fractures when applied. This makes me nervous about bonding a 7 inch plexiglass ring to my canopy. .083 in thickness. Any ideas about cast vs. extruded and potential problems? Thanks Larry |
#8
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Plexiglas cement??
On Mon, 05 Nov 2007 22:16:40 GMT, David Kazdan wrote:
Chloroform would probably work, but I think you mean methylene chloride. David no. anaesthetic chloroform although it probably hasnt been used as an aesthetic in years. applied by dipping a fine point artist brush in the stuff and then touched to the closed up crack, it wicks in , does its stuff and then evaporates. Stealth Pilot wrote: On Sun, 04 Nov 2007 21:09:01 -0800, Larry wrote: I am planning a "touchy" repair job to my canopy. I've done some test sheet acrylic bondings with acrylic IPS Weld-On (#16). I don't like the ugly bubbles and noticed some fine plexiglas stress cracking on one test piece. Is there another sort of cement (eg. Weld-On #40) which would make for a better looking bond between 2 sheets of .080 in plexiglas? Thanks. Larry isnt chloroform a thin solvent suited to wicking into plexiglas cracks? Stealth Pilot |
#9
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Plexiglas cement??
Wonder how silicone would do? They use it to make home aquariums. I
use it for holding lots of things - small sheet metal covers for wing bolt holes, txpdr antenna metal base to my composite plane....... Holds great. And it flexes slightly to help with differential heat expansion (your cracking problem?). Just let it cure overnight. On Nov 4, 11:09 pm, Larry wrote: I am planning a "touchy" repair job to my canopy. I've done some test sheet acrylic bondings with acrylic IPS Weld-On (#16). I don't like the ugly bubbles and noticed some fine plexiglas stress cracking on one test piece. Is there another sort of cement (eg. Weld-On #40) which would make for a better looking bond between 2 sheets of .080 in plexiglas? Thanks. Larry |
#10
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Plexiglas cement??
On Nov 4, 11:09 pm, Larry wrote:
I am planning a "touchy" repair job to my canopy. I've done some test sheet acrylic bondings with acrylic IPS Weld-On (#16). I don't like the ugly bubbles and noticed some fine plexiglas stress cracking on one test piece. Is there another sort of cement (eg. Weld-On #40) which would make for a better looking bond between 2 sheets of .080 in plexiglas? Thanks. Larry wrote in message ups.com... Wonder how silicone would do? They use it to make home aquariums. I use it for holding lots of things - small sheet metal covers for wing bolt holes, txpdr antenna metal base to my composite plane....... Holds great. And it flexes slightly to help with differential heat expansion (your cracking problem?). Just let it cure overnight. There is a very clear Silicone-like product which I used to install my windshield. It is packaged in a caulking-gun tube. Someone here must know it's name. I'll bet it would work well in this application. Rich S. |
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