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Author Topic: Glues for clear perspex  (Read 1474 times)

TheLongBuild

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Glues for clear perspex
« on: November 17, 2023, 07:37:14 pm »

Hi ..
Is there a specific glue you can get for Perspex around 5mm thick ?. 


Thanks
Larry

derekwarner

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Re: Glues for clear perspex
« Reply #1 on: November 17, 2023, 07:54:30 pm »


Larry courtesy of Google.....


Acetone is one of those chemicals that can be used in a pinch to get acrylic to stick but is nowhere near as effective as methylene chloride

Pretty sure when using methylene chloride, good ventilation or chemical mask breathing is required


Derek
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HMS Invisible

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Re: Glues for clear perspex
« Reply #2 on: November 17, 2023, 08:14:13 pm »

I've done a shed load of clear acrylic work with the solvents mentioned and uv curing acrylic. The latter wins hands down such that it is unlikely I'll solvent weld acrylic again.

Don't expect to be able to repair spectacle frames with uv glue but a novice can make invisible frost free acrylic welds on structural and intricate parts that don't flex too much. 5mm sheet will be fine.

For uv cure acrylic, I recommend you Google "5 second fix", look at customer YouTube demonstration.


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tica

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Re: Glues for clear perspex
« Reply #3 on: November 17, 2023, 09:03:11 pm »

Plastic magic from Deluxe Materials will do the trick  :-))
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TheLongBuild

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Re: Glues for clear perspex
« Reply #4 on: November 17, 2023, 10:05:04 pm »

Thanks, some stuff to look at there.
Reason for asking is I saw this model at the Blackpool show and can not remember what he said it was glued with and can not remember which club.

philk

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Re: Glues for clear perspex
« Reply #5 on: November 18, 2023, 11:19:51 am »

That belongs to a guy from the Southend club if I remember his name will post it
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Circlip

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Re: Glues for clear perspex
« Reply #6 on: November 18, 2023, 11:57:42 am »

Glue specifically made for Perspex,  Tensol, Clear colourless solvent adhesive. In the dim and distant, Chloroform was used but gave a brown cast to the joint.


 Regards   Ian
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mrlownotes

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Re: Glues for clear perspex
« Reply #7 on: November 18, 2023, 12:57:09 pm »

I immediately thought of perspex aquarium sheets.............your local aquarist shop may help.
Also, is this any use? :-
https://plasticsheetsshop.co.uk/acrylic/processing/glueing/
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TheLongBuild

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Re: Glues for clear perspex
« Reply #8 on: November 18, 2023, 08:00:33 pm »

That belongs to a guy from the Southend club if I remember his name will post it


Thanks

TheLongBuild

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Re: Glues for clear perspex
« Reply #9 on: November 18, 2023, 08:06:23 pm »

Chloroform was used but gave a brown cast to the joint.
 Regards   Ian


Can just imagine the looks if I asked for that now, bad enough ( Many years ago )when I was asking in supermarkets for Caustic Soda to clean the fridge, must have been about 3 shops before in the final store the lady asked if I meant bicarbonate of soda  {-) {-)  Going for a ECG  Tomorrow will ask if they have any Chloroform spare !! :police: :police:

HMS Invisible

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Re: Glues for clear perspex
« Reply #10 on: November 19, 2023, 12:40:04 am »

You can get change out six pounds for two uv glue pens delivered by Wednesday.

With this stuff you can work with machined parts or extruded acrylic without annealing and get absolutely no sign of crazing or stress cracks. It's impossible with solvent.
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Circlip

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Re: Glues for clear perspex
« Reply #11 on: November 19, 2023, 02:29:46 pm »

With this stuff you can work with machined parts or extruded acrylic without annealing and get absolutely no sign of crazing or stress cracks. It's impossible with solvent.


        Thought we'd been through the solvent saga recently ?????????????????????????        O0


  Regards  Ian.
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TheLongBuild

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Re: Glues for clear perspex
« Reply #12 on: November 19, 2023, 03:24:41 pm »

With this stuff you can work with machined parts or extruded acrylic without annealing and get absolutely no sign of crazing or stress cracks. It's impossible with solvent.


        Thought we'd been through the solvent saga recently ?????????????????????????        O0


  Regards  Ian.


Different project  :}

philk

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Re: Glues for clear perspex
« Reply #13 on: November 20, 2023, 09:42:19 am »

Southend guy named frank cannot remember his last name but we'll known at events. For lots of plastics I use uhu all plastic glue, love the stuff and no mess if your careful
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Re: Glues for clear perspex
« Reply #14 on: November 20, 2023, 10:04:23 am »

Southend guy named frank cannot remember his last name but we'll known at events. For lots of plastics I use uhu all plastic glue, love the stuff and no mess if your careful
The UHU glue is a solvent evaporating glue like plastic magic and Tensol.
This is the class of glue that the Springer maker has used. You can tell from the joints.

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John W E

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Re: Glues for clear perspex
« Reply #15 on: November 20, 2023, 11:04:08 am »

This topic sought of reminds me of that guy who built the brass landing craft. 


He was forever having to polish it - I wonder where his model is now - or, did he paint it I wonder?


I have been looking for photographs to see if I could see it - but - no images yet.


One thing I do remember about it, you could never see the solder joints on it.


John
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Re: Glues for clear perspex
« Reply #16 on: November 20, 2023, 12:06:41 pm »

This topic sought of reminds me of that guy who built the brass landing craft. 


He was forever having to polish it - I wonder where his model is now - or, did he paint it I wonder?


I have been looking for photographs to see if I could see it - but - no images yet.


One thing I do remember about it, you could never see the solder joints on it.


John
I think you mean the Mayhem member I saw logged on around the time I made the post above.

Here is a novice made joint on acrylic. The 3mm tube is extruded, not annealed and not done in a vacuum chamber. There is no discolouring. Through the join you can pick out a threaded hole in the flat sheet.Cure time was less than a minute. The date coded photo was taken minutes ago and no crazing or cracks have appeared in several years.

Do you want to see what happens after time to a similar type of joint made using a solvent evaporating acrylic glue?
It's a chore to boot up the laptop so it would take longer to post. At the same resolution and distance it is a horror show.

This is the first time I used Postimage uploader after many attempts and compression. I can upload at high resolution but I think it shows what can be done with UV hardened acrylic.
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HMS Invisible

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Re: Glues for clear perspex
« Reply #17 on: November 20, 2023, 01:47:10 pm »

I can date the bonding of the joint by UV-hardened acrylic to before January 2015.
The yellow box shows the narrow glued joint. The frosting is a machined edge on a circular cap which can be sanded clear. There are no clever tricks, skills like the vacuum wicking tools used in windscreen chip repair. It's a 3 liquid acrylic pen where excess can be wiped away and the job can be attempted and inspected before shining the led torch for five seconds.


January 2015 is also the date of the photo below. This acrylic tube was also extruded, and not annealed after cutting and sanding. The cracks have got progressively worse and now extend around the whole circumference where a solvent based acrylic glue was used. The cracking is not present on the non-glued ends.

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HMS Invisible

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Re: Glues for clear perspex
« Reply #18 on: November 21, 2023, 01:18:55 pm »

Photo of both sides of the 5SecondFix leaflet
Page 1 says Do not eat or squirt into your eyes so I have not bothered copy/pasting that text portion.



Text rendering of page 2 courtesy of my phone's camera app. ( not fully corrected for scanning errors)

ATTENTION:
Wear safety glases andr rubber gloves.
It
.Never look directly into the UV light. can cause eye damage.
.DO NOT use light for more than 10 seconds each use
.LED Belongs Risk Group1- Blue Light.
to
.Dispose of liquid material safely. DO NOT discharge into sewer or Waterways.
.Uncured materal ican be cleaned with organic solvents or baby wipes.
.DO NOT use solvents clean product from skin or eyes.
.DO NOT clean tip the Second Fix" pen with liquid cleansers, or expose the tip to other liquids.
.DO NOT allow clothing wet with material to stay in contact with skin. SIC
.DO NOT eat, drink or smoke,while handling,
.DO NOT allow wash water from cleaning or process equipment to enter drains.

HELPFUL HINTS:

WHERE TO USE: The liquid material bonds and ten cures when wpoced to ight, and cannot beu used outdoors
in direct unlight, Wor k utdos in a cool shaded area or indoors in a well-ventilated area. Do not expose the UV light into the iquid v welder tube or tip.
This may cause thel iquid welder materal to become bonded  inside the tube. Always replace the cap after applying thel iquid welder.

BONDING TIME:
a
The UV light will bond 5 Second FixM liquid material approximately the size of a pea within 5 seconds. For larger application allow longere exposure to the UV loh, to be sure the bondis made.
The UV light should be held within 3- -5mm fromthe application area. The center or "eye" of the UV LIGHT should focused the desired application area. Distance
lens, thickness ofthel iquid welder, and other factors will Igreatly i influence bonding time.

BONDING THICKNESS:
Depending onrequired thickness, apply 5 Second Fix" in several layers. Each layer approx. 1mm-2mmthick can be bonded per the directionsabove. Repeat application
and UV light bonding for each layer ensuring each e layeris completely bonded.

UV BONDING:
The bond is obviouslys /strongertoareasthat can be easiy cesed bythe W ight Bonding
through clear, semi-clear, or translucent materials works well. ,Ifusing solid materials, bonding
in
thinner layersis highly Suggested. Liquid welder that is not accessible to the UVlight will
notbond, but should cure over ra 24-hour period.
BATERYINFO:
2X CR1620 3V Batteries (NGLUDED)
REMOVE BATTERY PROTECTOR BEFORE USE,
.
.TURN OFF WHEN NOTIN USE.
.Replaceproduc entirlywhenliquid wlder
"dn pasn s!. powern battery or
BATERY WARNINGS:DONOT MIKOLD ANDNEW
BATTERIES, DON NOT MIX ALKALINE AND STANDARD
(CARBON ZINC BATTERIES, OR RECHARGEABIE(NICKEL
CADMIUM) BATTERIES. BATTERIES ARE NOT DESIGNED TO
BE REPLACED. DO NOT TAMPER WITH BATTERIES. INSERT
BATERESACCORDINGIOPOLARTO DO NOT RENENEOR
MX THE DIRECTION OF THE BATTERIES. DISPOSE OF
BATTERIES PROPERLY.
_________
To get the contents & clue to any alcohol based thinner I goggled 5second fix & SDS for its safety data sheet.
That search gave this link in a page1 hit. https://www.rapidfix.com/content/files/RapidFix/SDSs/RapidFix%20UV%20Adhesive%20SDS.pdf

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TheLongBuild

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Re: Glues for clear perspex
« Reply #19 on: November 21, 2023, 04:06:46 pm »

Thanks, I will order some to test with, might be useful for some other projects as well not Rc model related..
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