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Simple Filament Dry Bag

by scotty1024, published

Simple Filament Dry Bag by scotty1024 Dec 19, 2012

Description

This is a very simple, inexpensive and yet effective dry bag for filament.

Recent Comments

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"An Excellent Product"

-Chef Excellence
Exactly, that's why I've been using and recommend the orange stuff from the person in Singapore. At this point though I am highly impressed with the Eva Dry. The bags are .4 cubic feet when fully expanded and generally I push most of the air out so they're really more like .2 cubic feet. The Eva Dry is rated for many times that volume and it shows in drying times. I don't have to leave filament in over night with the Eva Dry to tune it back up. I can pop it in for an hour and get a nice razor clean print from it.

At this point I've purchased another of the Eva Dry's from Amazon so I can keep my filament razor sharp ready for my farm.
Btw. please be careful with which types of silica gel you use.
Some of the color changing ones are toxic.
(Mostly the blue stuff)

hengyeusa.com/community/look-at-all-the-colors-of-silica-gel

geejaychemicals.co.uk/silicagel.htm

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Instructions

Parts required for the build:

One Ziploc Big Bag Large size One 50 gram pack of orange indicating desiccant

Tools required

Phillips #0 screw driver

Assembly

Poke holes in the desiccant pack with a Phillips #0 screw driver. I suggest six to eight holes spread evenly over the top of the pack.

Place spools in Ziploc bag and place desiccant pack on top, seal bag. I find over night in a heated place is enough to dry out PLA to be printable again.

When beads in the pack turn green it is time to think about replacing it or refreshing it in the oven.

Amazon link for Ziploc: http://www.amazon.com/gp/product/B003U6A3C6/ref=oh_details_o00_s00_i00 eBay link for desiccant: http://offer.ebay.com/ws/eBayISAPI.dll?BinConfirm&_trksid=p2047675.l1356&rev=4&item=221056467788

Suggested warm place: top of your hot water tank. (if your hot water tank isn't water tight you've got bigger issues than damp PLA)

Update 12/27/2012:

I have now tested this design using an Eva-dry Renewable EDV-300/E-333 Wireless Mini Dehumidifer. This device has a built in dryness indicator so you know when your filament is staying dry and when you need to renew the dehumidifier. The device has a built in drier that allows you to plug it into the wall over night and have it dry itself out. Device is rated to absorb up to a cup of water.

The Ziplock Big Bag and Eva Dry can both be purchased from Amazon.

http://www.amazon.com/Eva-dry-Renewable-E-333-Wireless-Dehumidifer/dp/B000H0XFCS/ref=cm_cmu_up_thanks_hdr

"An Excellent Product"

-Chef Excellence
Btw. please be careful with which types of silica gel you use.
Some of the color changing ones are toxic.
(Mostly the blue stuff)

hengyeusa.com/community/look-at-all-the-colors-of-silica-gel

geejaychemicals.co.uk/silicagel.htm
Exactly, that's why I've been using and recommend the orange stuff from the person in Singapore. At this point though I am highly impressed with the Eva Dry. The bags are .4 cubic feet when fully expanded and generally I push most of the air out so they're really more like .2 cubic feet. The Eva Dry is rated for many times that volume and it shows in drying times. I don't have to leave filament in over night with the Eva Dry to tune it back up. I can pop it in for an hour and get a nice razor clean print from it.

At this point I've purchased another of the Eva Dry's from Amazon so I can keep my filament razor sharp ready for my farm.
Just a list of other desiccants, if anyone feels like working with whatever they got around: en.wikipedia.org/wiki/List_of_desiccants
I would add to the above wiki: Minute Rice. Pour into a coffee mug until full and put it on top of the spool in the bag.
A handy list but I prefer to have it turn green to let me know I need to change it. :-)
I tried something almost identical, but my PVA went bad despite few openings.
How much desiccant did you use? 50 grams is a pretty big bag of beads. 

This model of Ziploc bag has a flat bottom so there is no bottom seam for the spools to stress as there would be with the usual sandwich style bag.

In addition these bags are made from a heavier thickness of plastic.

There is also a handle molded into the top although I don't know if you want to use the handle to pick up a pair of 5 pound spools.
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