I can only speak for 9100. We love it out in the lab for easy clean up and post processing. The milky color is visually appealing and the increased flexibility over older resins makes it more robust and realistic for many applications. It seems to have a slightly higher shrink rate than previous resins, on the order of 1.002 on our 500, which makes it more prone to in-build warpage. This can usually be alleviated by rotating parts slightly around Z to shorten the hatch vectors. It doesn't bend as far as the 7540 sample I got in the mail did initially, but neither material is very fatigue resistant... in other words, stay in the elastic range or it won't last long at all. Both 9100 and 7540 gradually get more brittleand rigid over time. I would guess that the 7540 is very soft right out of the machine as is the 9100.
Disclaimer: Engineer and out the other!
Quick is not good if you're going the wrong way.
Michael W Miller (michael.w.miller@boeing.com)
The Boeing Company M/C 17-PE B-2T65
Propulsion Experimental Hardware 206-655-3289
Rapid Prototyping 655-4366 Lab 655-4365
> ----------
> From: Bob Olsen[SMTP:bob@protogenic.com]
> Sent: Monday, November 13, 2000 12:34 PM
> To: rp-ml@ltk.hut.fi
> Subject: Flexible SLA Resins
>
> Hi, I'm new to the list, if this has been discussed, let me know where to go to get the info, thanks.
>
> We are interested in putting either Somos 9100, RPC 600, or Vantico 7540 in our 350. Does anyone have strong feelings about which material is better, more accurate, easier to finish, more robust, more flexible over time, etc?
>
> While we would use primarily as sla models, we would also want to be able to use a mold patterns in a pinch. Any problems with silicone cure, finishing to a mold pattern level, and so on?
>
> We'd appreciate any insight folks have on this subject, thanks! Bob
> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
> Bob Olsen marketing manager Direct: 303-453-3990
> protogenic, inc. General: 303-252-0212
> 1490 w. 121 ave. < mailto:bob@protogenic.com>
> suite 101 Web: http://www.protogenic.com
> westminster, co 80234 Fax: 303-252-0223
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>
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