Acetone is more aggressive. If we left a part submerged in isopropyl, we had
about 10 minutes maximum exposure time. With acetone we have 2-3 minutes;
after that parts will soften.
Acetone also becomes ineffective at lower resin saturation levels than
isopropyl, so we use about 50% more acetone.
Chuck
Solid Concepts
At 01:30 PM 2/3/00 -0800, you wrote:
>
>Chuck,
>How does acetone affect the SLA parts?
>
>Pedro Alaniz
>The Boeing Company
>> ----------
>> From: Chuck Alexander[SMTP:calexander@solidconcepts.com]
>> Sent: 03 February, 2000 12:14 PM
>> To: rp-ml@bart.lpt.fi
>> Subject: RE: alternative solvent for sla parts?
>>
>> At 01:37 PM 2/3/00 -0600, you wrote:
>> >Propylene Carbonate is superior to TPM. It cuts through the resin 4-5
>> times
>> >faster, water soluble, cheap and non-hazardous (its used in perfume and
>> some
>> >food products).
>> >
>> >Bill
>> >
>> >*********************************
>> >William Ballmaier
>> >Scimitar Prototyping
>> >1529 Bourbon Parkway
>> >Streamwood, Illinois 60107
>>
>> Propylene Carbonate does not meet the 50g/l requirement. We were using
>> isopropyl before SCAQMD came thru and told us we could no longer use it.
>> We
>> investigated other solvents, but every one that met the 50g/l requirement
>> was aggressive to humans.
>>
>> We ended up switching to acetone. It doesn't meet the 50g/l requirement
>> either, but it's on the SCAQMD's exempt chemical list.
>>
>> Chuck Alexander
>>
>> Solid Concepts Inc.
>> Rapid Prototyping Software & Services
>> ph. 661-257-9300
>> fax 661-257-9311
>> http://www.solidconcepts.com
>>
>>
>> For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
>>
>
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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