Acrylic vs Polycarbonate and why? - Page 2 - Router Forums
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post #11 of 21 (permalink) Old 10-08-2019, 10:20 AM
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add the chart to the addendum library????

& perhaps to a sticky in the forum since a form of this comes up regularly

smitty
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post #12 of 21 (permalink) Old 10-08-2019, 10:37 AM
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Quote:
Originally Posted by smitty10101 View Post
@stick

add the chart to the addendum library????

& perhaps to a sticky in the forum since a form of this comes up regularly

smitty
done...

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”
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post #13 of 21 (permalink) Old 10-08-2019, 11:16 AM
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Default Need to polish your Polycarbonate???

Have at it...

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File Type: pdf Polishing Polycarbonate.pdf (29.6 KB, 13 views)
File Type: pdf PLASTICS ANNEALING.pdf (104.8 KB, 14 views)

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”

Last edited by Stick486; 10-08-2019 at 11:39 AM.
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post #14 of 21 (permalink) Old 10-09-2019, 11:22 AM
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Ashley, I used 1/4" cast acrylic (better quality than extruded) in a router table and found that it sagged a little (see Chuck's advice above). Polycarbonate is even less stiff. I would go thicker if you're going much beyond the router base and expecting support.

Doug mentioned drilling... A guy I used to work for in the sign business would drill the concrete floor before using a new bit on acrylic. Maybe not the ideal way to handle the situation but it avoided the snagging / cracks. As I mentioned before, I use cheap stepper bits but that might not be great for thicker plastic because of the bit-width changes (I used mostly 3/16 and 1/4 inch for signs).

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post #15 of 21 (permalink) Old 10-09-2019, 09:40 PM
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stretched Polycarbonate is used for fighter jet canopies, as it's very tough, and because it's stretched, if hit with a bullet, it shatters into small pieces like tempered glass.. I don't remember Acrylic being used in any Military applications, so I don't think it's better..
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post #16 of 21 (permalink) Old 10-09-2019, 11:45 PM
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One other thing. You can glue acrylic, by not polycarbonate. The glue is a very thin liquid and needs a special needle applicator to apply. I found the glue and applicator at a local plastics shop. Here's a link to what you need at Amazon:

https://www.amazon.com/Weld-Acrylic-Adhesive-Applicator-Bottle/dp/B0096TWKCW/ref=asc_df_B0096TWKCW/?tag=hyprod-20&linkCode=df0&hvadid=312719382368&hvpos=1o2&hvne tw=g&hvrand=8862313467348406152&hvpone=&hvptwo=&hv qmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=&hvtargi d=aud-801381245258la-404766667839&psc=1&tag=&ref=&adgrpid=63696814698&h vpone=&hvptwo=&hvadid=312719382368&hvpos=1o2&hvnet w=g&hvrand=8862313467348406152&hvqmt=&hvdev=c&hvdv cmdl=&hvlocint=&hvlocphy=&hvtargid=aud-801381245258la-404766667839. It's been awhile since I've purchased any, but I believe was cheaper locally.

The ability to glue acrylic really expands its possibilities. As an example, several years back, I made a vacuum fence for my cabinet saw. It attaches to my Incra TS fence system. With a variable speed control on my vacuum, I can set the vacuum from light to so tight it's hard to feed the stock. It has completely eliminated kickback on my saw and ensure the stock remains tight against the fence. It's also very slick.

Gary

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Last edited by gmedwards; 10-09-2019 at 11:48 PM.
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post #17 of 21 (permalink) Old 10-10-2019, 12:19 AM
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How to Glue a Polycarbonate Sheet

Lightly (VF/XF) sand the locations where you want to glue the pieces together.
The locations should be smooth to the touch.
Clean the edges of the sheets where you want to fuse them together.
Add a small trail of methylene chloride or chloroform along one edge of one sheet.
Allow the solvent to soak into the sheet. The edge should become a little sticky.
Place the sticky edge onto the clean edge of the other sheet.
Support/clamp the sheets to keep the two edges in constant contact with light clamping pressure while the sheets dry.
Allow the two sheets to dry for 14~48 hours.
This should be done in an extremely well-ventilated area.

DO NOT FORGET to use your respirator, eye protection and rubber gloves....

http://www.wipolymers.ie/2015/05/glu...-glue-ireland/
https://www.cyberbond1.com/adhesive-...ate-adhesives/
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This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”

Last edited by Stick486; 10-10-2019 at 12:36 AM.
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post #18 of 21 (permalink) Old 10-10-2019, 01:04 AM
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y'all might want to read this...

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File Type: pdf MSDS_MethyleneChloride-2.pdf (286.6 KB, 15 views)
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post #19 of 21 (permalink) Old 10-10-2019, 10:28 AM
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Default How to Clean Polycarbonate Sheets

How to Clean Polycarbonate Sheets

Manufacturer-Approved Cleaning Procedures for Multi-Wallcleaning-polycarbonate-sheets. Polycarbonate, Acrylic & APET



The UV-resistant surface treatment on one side of the polycarbonate sheet significantly improves long-term weatherability. Periodic cleaning using proper procedures and compatible cleaners is recommended to prolong the service life. For general cleaning, it is recommended that the following instructions and cleaning agents be used. These procedures and cleaners are also recommended for use on the untreated, interior surface of the polycarbonate sheet, and for acrylic and APET plastics.


CLEANING PROCEDURES

Rinse polycarbonate sheet with lukewarm water.
Wash polycarbonate sheet with a mild soap and lukewarm water.
Use a soft cloth or sponge and gently wash with an up and down motion in the same direction as the flutes, as shown in Fig. 1.
Rinse the cloth or sponge and change the water often. DO NOT SCRUB or use brushes or squeegees. The coating on polycarbonate sheets is UV-resistant; IT IS NOT A MAR-RESISTANT COATING.
Repeat rinse and dry with a soft cloth to prevent water spotting.




IMPORTANT:
If a material is found to be incompatible in a short-term test, it will usually be found to be incompatible in the field. The converse, however, is not always true. Favorable performance is no guarantee that actual end-use conditions have been duplicated. Therefore, these results should be used as a guide only and the products must be tested under actual end-use conditions by the user.

NOTE:
I have found that ammonia degradates Acrylic and Polycarbonate's inherent UV protection over time...

Polycarbonate sheets are treated on one side for protection against UV damage. This treated side must be glazed outward or toward the light source to provide protection for polycarbonate sheet substrate.

© 2014 The Polycarbonate Store

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

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Forget the primal scream, just ROAR!!!
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post #20 of 21 (permalink) Old Yesterday, 01:18 PM
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When putting sheets in aluminum frames, we used to put a 'hanging block' along the top and bottom edges of a face. We used methylene for acrylic but pop-rivets for polycarbonate.
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