Reprap Forum - Polymer Working Group Plastics, Epoxies, Resins, Photopolymerization, etc - Research, Development, Use, and Analysis -> http://objects.reprap.org/wiki/Plastics https://reprap.org/forum/list.php?184 Tue, 16 Jun 2026 20:18:06 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?184,894196,894196#msg-894196 Thermoset Type Plastics used in a extrusion type printer? (4 replies) https://reprap.org/forum/read.php?184,894196,894196#msg-894196 brianmh13 Polymer Working Group Fri, 02 Feb 2024 14:03:15 -0500 https://reprap.org/forum/read.php?184,876049,876049#msg-876049 3D printed threads in Nylon 12 (no replies) https://reprap.org/forum/read.php?184,876049,876049#msg-876049 electrophile Polymer Working Group Thu, 13 Aug 2020 00:34:19 -0400 https://reprap.org/forum/read.php?184,861631,861631#msg-861631 ... UV-resin shelf-life more than 10 years !! (10 replies) https://reprap.org/forum/read.php?184,861631,861631#msg-861631
some 10+ years ago I've received a bottle of experimental UV-resin from Fernando (spota) -- found the bottle in the basement and it was still fluid.

So tested it with "standard setting", same as for a common white resin (in the last image) -- looks like perfect prints! ... after 10 years in the basement (with broken cap) :)-D

[attachment 113143 AltesResin1-abtropfend.jpg] [attachment 113144 AltesResin3-fertig.jpg]


... here the white resin (with a printing error):

[attachment 113145 WeissesResin-Fehldruck.jpg]]]> VDX Polymer Working Group Wed, 27 Jan 2021 02:37:52 -0500 https://reprap.org/forum/read.php?184,846737,846737#msg-846737 PFA filament and printer (no replies) https://reprap.org/forum/read.php?184,846737,846737#msg-846737
I would like to know if anybody knows if are there a printer which print in PFA filament and how can I get more info about PFA filaments and printers can do this.

Thanks in advance

Best regards

Nalayh]]> nalayh Polymer Working Group Mon, 11 Feb 2019 07:54:38 -0500 https://reprap.org/forum/read.php?184,835764,835764#msg-835764 Additives for layer adhesion in Polymers (no replies) https://reprap.org/forum/read.php?184,835764,835764#msg-835764
I'm wondering whether it's common practice for filament manufacturers to include additives to increase layer adhesion.

Is this the case? If so, do you know what it may be?
I assume it would also vary based on polymer type.

Thanks,
Charles]]> CharlesDesign Polymer Working Group Mon, 08 Oct 2018 12:20:59 -0400 https://reprap.org/forum/read.php?184,829110,829110#msg-829110 UV hardened thermoplastic resins? (no replies) https://reprap.org/forum/read.php?184,829110,829110#msg-829110
The two possibilities I see are either finding a resin (monomers or short chains) that is itself thermoplastic and would fully polymerize when exposed to UV light, or coming up with a mix of an existing thermoplastic material and a resin where only the resin component would polymerize when exposed to UV light.

Any ideas/suggestions?]]> tmber Polymer Working Group Fri, 20 Jul 2018 14:29:36 -0400 https://reprap.org/forum/read.php?184,812321,812321#msg-812321 Blank copperless PCB? (5 replies) https://reprap.org/forum/read.php?184,812321,812321#msg-812321
I've been finding a sheet of anything that can diffuse the led lights effectively. I've found out that using a pcb on an area without copper trace/fill there works best.

Is there anyway that I am able to source a blank copperless pcb sheet and I prefer them to be white colour.

Or if you guys have any suggestion on alternatives to the effectiveness of the pcb It would be greatly appreciated.

Thank you for your feedback]]> sarf2k4 Polymer Working Group Wed, 28 Feb 2018 09:24:54 -0500 https://reprap.org/forum/read.php?184,810141,810141#msg-810141 DIY bioplastics (1 reply) https://reprap.org/forum/read.php?184,810141,810141#msg-810141 www.instructables.com] which describes how to make your own plastics from (starch + glycerol) or (vinegar + sugar).

A quick search found numerous other pages....

[www.instructables.com]
[www.instructables.com]
[www.instructables.com]

I'm wondering whether anyone has tried something like this to produce 3D print filament?]]> frankvdh Polymer Working Group Tue, 13 Feb 2018 14:41:19 -0500 https://reprap.org/forum/read.php?184,791779,791779#msg-791779 Homemade resin shrinks/warps (3 replies) https://reprap.org/forum/read.php?184,791779,791779#msg-791779
A few months I started trying to make my own resin. After gathering all the necessary chemicals I think I'm close to the final recipe.
The recipe is the following:
-1 kg resin (1,6-Hexanediol diacrylate)
-10 grams photoinitiator (Phenylbis(2,4,6-trimethylbenzoyl) phosphine oxide)
-5 grams pigment (Sudan I)

This resin seems to have some potential. I tried to print some objects (basic hollow circle extrusions) with my SLA printer. I printed with lasers with a wavelength of 405nm, varying in power ranging from 100 mW to 300 mW.
All these prints however, have been warping while printing. The first few layers go well, but after that the object just warps.
The build plate is made from aluminum and the adhesion is very well when I check it after the first few layers.
So it seems the resin just shrinks/warps when it has been cured.
Does anyone have an idea how to solve this?

Thanks!]]> SimonVP Polymer Working Group Sat, 14 Dec 2019 03:01:33 -0500 https://reprap.org/forum/read.php?184,773253,773253#msg-773253 The softest filament FDM printed to date. (no replies) https://reprap.org/forum/read.php?184,773253,773253#msg-773253
Just though I would share the results of another alpha test of a completely new type of extrusion system currently under development.

While the extrusion mechanism eliminates the potential of print failures associated with printing flexible filament and substantially increases the speed at which filament can be printed we are also pushing the boundaries as to how soft a material you can print.

Currently we are printing a shore hardness of 46A. Could we go lower? We are looking around for an even softer material.

FDM printing with 46A

We are printing this material incredibly slow 20 mm / sec with 3 mm filament, but once you print with this material any thing else with a shore hardness of 60A+ is like printing with PLA, that is very very easy and fast.

Happy for feed back which is why I am posting.]]> Arnold Lane 1000 Polymer Working Group Tue, 13 Jun 2017 21:27:18 -0400 https://reprap.org/forum/read.php?184,768972,768972#msg-768972 Printing with PLA - your experience (no replies) https://reprap.org/forum/read.php?184,768972,768972#msg-768972
We're currently undertaking a small survey (won't even take a minute to fill out) on printing with PLA and we need you to participate. We'd like to know what your experience with PLA is, whether you use it or not. This way, we'd like to be able to cater to your 3D printing needs. It'd be awesome if you could help us by filling out the survey on the following link: [docs.google.com]

Thank you very much for your help!

Best regards,
Stani
Tiamet 3D]]> Tiamet3D Polymer Working Group Fri, 19 May 2017 10:30:28 -0400 https://reprap.org/forum/read.php?184,765179,765179#msg-765179 Heat Resistant TPU (5 replies) https://reprap.org/forum/read.php?184,765179,765179#msg-765179
We are alpha testing a heat resistant thermoplastic polyurethane material that we are working on and I thought we would take this forum to share what what has been achieved to date.

The base polymer is capable of withstanding 150 degrees c for 3000 + hours, however we would like to see whats capable with 3 d printed items.

The following video displays a few tests conducted so far.

Heat resistant TPU video

If you have an item an idea or feedback to test this polymer please PM or post an stl. and we will see what can be achieved.


[attachment 93601 marvinandhammercompressed.jpg]

or check out my hub @ www.3dhubs.com
3 D flex's hub]]> Arnold Lane 1000 Polymer Working Group Sat, 17 Jun 2017 19:23:13 -0400 https://reprap.org/forum/read.php?184,763992,763992#msg-763992 Why the need for environmentally friendly fluorescent pigment. (no replies) https://reprap.org/forum/read.php?184,763992,763992#msg-763992 Fluorescent pigment is made which does not contain formaldehyde or slight environmental formaldehyde resin products, therefore do not emit formaldehyde odor in the process, do not contain formaldehyde in the product composition. High quality fluorescent pigment screw low viscosity, in production does not produce black, greatly extended the continuous production of screw time, shortens cleaning time, simplifies the cleaning process, to save on production costs. Quality fluorescent pigments used in low temperature injection, effectively help users to save energy and reduce costs. Its good thermal stability, effects of temperature fluctuation on the color difference is very small, and simplify the operation of injection, suitable for coloring all kinds of plastic products, superior performance, and has a very good color tinting, uniform and bright and colorful.]]> zhongwangli Polymer Working Group Sun, 23 Apr 2017 22:27:12 -0400 https://reprap.org/forum/read.php?184,759768,759768#msg-759768 Resin Deposition Modelling (RDM) a new 3D printing method (10 replies) https://reprap.org/forum/read.php?184,759768,759768#msg-759768
It consists in depositing UV curable resin by means of a dispenser and a needle and immediately cure it using a 100mw/405nm laser diode beam.

Basically, we developed a toolhead for our robot that incorporates a rotating turret implementing a new axis - the R axis. This axis guides the laser beam tangentially to the dispensing needle, in such a way, that the beam is always following the motion path of the needle curing the resin.



More information: Diyouware
]]> Diyouware Polymer Working Group Tue, 23 Jan 2024 19:51:16 -0500 https://reprap.org/forum/read.php?184,758107,758107#msg-758107 Smoothing out 3d prints (no replies) https://reprap.org/forum/read.php?184,758107,758107#msg-758107 www.youtube.com]]]> mgooch Polymer Working Group Thu, 23 Mar 2017 20:28:26 -0400 https://reprap.org/forum/read.php?184,737272,737272#msg-737272 PLA on TEP (1 reply) https://reprap.org/forum/read.php?184,737272,737272#msg-737272 Is this possible or must I use another material (TEP and Nylon) ?
See also [www.thingiverse.com]]]> tunnelplan Polymer Working Group Mon, 14 May 2018 21:18:54 -0400 https://reprap.org/forum/read.php?184,733095,733095#msg-733095 Kossel heated chamber (no replies) https://reprap.org/forum/read.php?184,733095,733095#msg-733095 Dasdsddasdf Polymer Working Group Mon, 26 Dec 2016 09:44:31 -0500 https://reprap.org/forum/read.php?184,728265,728265#msg-728265 Movies about Filaments and printing tips (no replies) https://reprap.org/forum/read.php?184,728265,728265#msg-728265
what do you think about little movies/podcasts about the filament fabrication and some tips how to handle with it?

For example: Hey, this is our Extruder, actually we produce PETG, lets take a closer look at the process...and later some tips for printing it!

I think this is very interesting for beginners and for more experienced people to get a closer look behind the scenes...
In addition to this it could be easier for some people to try the "new" filament, because they can see from where it comes!

Do you think this is a good idea for some companies?

Thanks for your replies :)]]> jbe_m4p Polymer Working Group Mon, 05 Dec 2016 03:35:15 -0500 https://reprap.org/forum/read.php?184,721130,721130#msg-721130 HIPS instead of ABS (2 replies) https://reprap.org/forum/read.php?184,721130,721130#msg-721130
I have seen that many people are using HIPS instead of ABS sometimes...wait...HIPS?? I think its "just" support material?? What do you think about that? I dont have HIPS so i cant judge about this, but using it instead of ABS/PLA? hmm..

Thank you :)]]> jbe_m4p Polymer Working Group Mon, 14 May 2018 21:23:24 -0400 https://reprap.org/forum/read.php?184,715864,715864#msg-715864 Resin for reinforcment (no replies) https://reprap.org/forum/read.php?184,715864,715864#msg-715864
So, ive been printing PLA for over a year now, simply because i have always had trouble with other materials. While shopping my local source for some filament, i came across some really really cheap madesolid vorex resin. Apperently SLA printing isnt big near me, but i couldnt resist. Because i dont have the time to dedicate to developing a DLP or SLA machine right now i was curious if i could use it to reinforce my PLA prints?

I found through very little research that vorex cures with a healthy dose of UV light and tested on some scrap prints i had by brushing it on by hand while under a uv source. Long story short it adhears very well and gives a nice finish almost like acetone and abs, does anybody else do this? Have you seen a a positive outcome from it? Or am i degrading pla in a way? If this works well i could see it really helping users who dont want to spend money for the required elements to be able to print in higher strength filamemts, or dont want a new level of frustration. Also 250ml will go a very long way with this process.

Any ideas or insight are helpful. Thanks for your time guys.]]> Tukr Polymer Working Group Fri, 21 Oct 2016 02:01:00 -0400 https://reprap.org/forum/read.php?184,691096,691096#msg-691096 UV Epoxy, polyester and vinyl-ester resins (no replies) https://reprap.org/forum/read.php?184,691096,691096#msg-691096
I have this resins in pure form and I wonder if somebody can help me to select the right photoinitiator for each resin.


Thanks.]]> lord.humungus82 Polymer Working Group Fri, 22 Jul 2016 19:41:20 -0400 https://reprap.org/forum/read.php?184,673209,673209#msg-673209 Polycarbonate 3d printing (5 replies) https://reprap.org/forum/read.php?184,673209,673209#msg-673209 i'm building a kitcar and i need some headlights and taillights printed in Polycarbonate. There is already a 3d model, just need somebody who knows a thing or 2 about 3d printing and has the equipment.

Cheers,
Sebastian]]> x_sebastian1 Polymer Working Group Fri, 21 Dec 2018 17:50:39 -0500 https://reprap.org/forum/read.php?184,654740,654740#msg-654740 Photopolymer resin's stamp cutting (5 replies) https://reprap.org/forum/read.php?184,654740,654740#msg-654740
Looking forward to some positive suggestions.

Thank you in advance.

Vidushi]]> Koolvidz Polymer Working Group Wed, 20 Apr 2016 15:04:29 -0400 https://reprap.org/forum/read.php?184,653688,653688#msg-653688 Ninjaflex - Heated Bed? (2 replies) https://reprap.org/forum/read.php?184,653688,653688#msg-653688 Am I going to run into endless problems or should it be ok?]]> ByteSlinger Polymer Working Group Mon, 14 May 2018 21:28:58 -0400 https://reprap.org/forum/read.php?184,649209,649209#msg-649209 Power vs. cure time for resins? (3 replies) https://reprap.org/forum/read.php?184,649209,649209#msg-649209 I'd like to know how fast I can print drop-by-drop. (ie: milliseconds?)

thanks]]> jonnycowboy Polymer Working Group Thu, 14 Apr 2016 13:45:59 -0400 https://reprap.org/forum/read.php?184,649054,649054#msg-649054 [low-cost RESIN] SLA Printer (1 reply) https://reprap.org/forum/read.php?184,649054,649054#msg-649054 I am new here and hadn't had much time to look for a similar thread.

We're building a 3D SLA Printer based on an existing one,but using a different resin and projector.

We are now testing the new resin on the old printer first.

Old printer uses : * Resin : MakerJuice Labs G+
* Projector : ACER p5307wb

New printer has to use : * Resin : Hegardt H-61
* Projector : ACER P6500 (more powerful)

Current testing status : * Resing: Hegardt H-61
* (old projector) : ACER p5307wb

The issue is that the resin H-61 doesn't cure .
We increased the exposure time,but it doesn't seem to cure any UV with our parameters.
We loaded a test cube (10x10x2 [mm] ),the ETA was 30 minutes,but nothing solidified .

(The tank that we're using is a "sample tank" which was successfully tested with MakerJuice G+ resin and the ACER p5307wb projector )

What solutions could you have for this new resin ?
It is very similar to glue,so dens.
What parameters should we change or something like this ?

I am looking forward to reading your comments upon this.

Thank you for your attention !]]> robert13 Polymer Working Group Wed, 06 Apr 2016 11:25:58 -0400 https://reprap.org/forum/read.php?184,647021,647021#msg-647021 NEXTFILA - the connectable 3D printer filament system (no replies) https://reprap.org/forum/read.php?184,647021,647021#msg-647021
You have to waste a remaining filament always,
you have to wait to change a remaining filament to a new filament
and a printing might be failed if you miss a right time to change filaments.

These are very headache problems in 3D printing but nobody have thought about it.
I developed NEXTFILA - the connectable 3D printer filament system to solve these problems.
There are lots of things to solve if this connectable 3D printer filament system would be adopted to everyone.
So, I make this forum to listen opinions about this connectable filament system.

See my web site http://nextfila.com and give your opinions and ideas.

I also launched this idea on crowd funding site Indiegogo on 17.Mar.2016. ( https://igg.me/at/nextfila )

And I have been opening this technology.
You may get related design files on https://github.com/nextfila/connectable-filament .

This connectable 3D printer filament system will help your printing, save a cost and even it will help to save the environment because it can reduce waste filaments.
Your contributions and your opinions will be great help to come out this "NEXT GENERATION FILAMENT" system to the world..


khans.]]> nextfila Polymer Working Group Thu, 31 Mar 2016 22:35:18 -0400 https://reprap.org/forum/read.php?184,642876,642876#msg-642876 Multi-Material SLA with different colors (7 replies) https://reprap.org/forum/read.php?184,642876,642876#msg-642876
I am printing with near UV and diacrylate polymers. My tests with pigments and dyes have not been fruitful so far as my material has a very high water content (~90%) and color just diffuses over time. Even if my parts are beautifully stained right after the printing, the defined color distributes throughout the object over time.

So I am looking for some kind of water soluble dye/pigment that stays in place after polymerization, maybe even by covalent bonding. Any ideas are highly appreciated.]]> der_Bam Polymer Working Group Fri, 21 Apr 2017 04:14:22 -0400 https://reprap.org/forum/read.php?184,638683,638683#msg-638683 Taulman Nylon 230? (no replies) https://reprap.org/forum/read.php?184,638683,638683#msg-638683 Ransom Polymer Working Group Sat, 12 Mar 2016 09:43:33 -0500 https://reprap.org/forum/read.php?184,637366,637366#msg-637366 Composition of filaments (2 replies) https://reprap.org/forum/read.php?184,637366,637366#msg-637366 marsius Polymer Working Group Wed, 09 Mar 2016 10:06:02 -0500