List the consumables we actually need people to source

[ajlennon]

This issue is just for what we actually need to source. For discussions on what we may need to source please go to #7, #15

Items we have sufficient stocks of (enough for >20000 visors) are crossed out like this

Q. Where are the best places to get this stuff?

Eye protectors / Visors

3D printing

• PETG (preferred) - 1.75mm and 2.85mm sizes (better we are advised as can be sterilized, but maybe harder to print with)

  • https://www.filamentive.com/product-category/rpetg-recycled-petg-pet-3d-printer-filament/ They give a 30% discount to help the Corvid efforts if you put PPE30 code in at the checkout, but they're getting low on stocks at the moment
  • https://shop.3dfilaprint.com/pet--petg-202-c.asp (filter by FilaPrint brand is probably best)

• PLA - 1.75mm and 2.85mm sizes (is this appropriate - everybody is printing with it so it better be)

• Buttonhole elastic - (I think) anything around 16mm-20mm will be okay

  • https://www.ebay.co.uk/itm/Button-Hole-Elastic-Waisband-Black-or-White-16mm-19mm-and-25mm-Widths/332755556624

• Visor material

  • 140-500 micron thickness, clear, any of PVC, PETG, polypropylene, polyester. If it's pre-cut to A4, even better.

Laser Cutting

• Polypropylene sheets - 0.5mm-1.5mm thick (we've been prototyping with 1mm, which works nicely, but anything in that range will be okay). The laser suppliers page on the DoES Liverpool wiki is a good starting point for sources.

  • https://www.kitronik.co.uk/materials/polypropylene/0-8mm-polypropylene-sheets.html
  • https://www.hindleys.com/polypropylene-sheet.html
  • https://www.trentplastics.co.uk/engineering-plastics/polypropylene-rod-sheet/polypropylene-sheet-natural
  • https://www.tilgear.info/materials/plastic-materials/polypropylene-sheet

• Visor material

  • 140-500 micron thickness, clear, any of PVC, PETG, polypropylene, polyester. If it's pre-cut to A4, even better.

Foam Visors

• Approx A4 sheets of clear PETG/Polypropylene/PVC/Acetate in 140/180/220/240 micron.
• 25mm Elastic Strip
• EVA/Plastizote foam 10/12mm thick with reasonably smooth surfaces eg Gym/Yoga floor mats.
• 23/13 or 26/6 staples
• Stick on Velcro 20mm

Useful equipment includes;

• 18mm Snap Off Knife
• Heavy Duty Stapler capable of stapling 100 sheets of paper
• Standard office stapler
• Round Corner Cutter or 10mm Corner Cutter Pro Punch R10

Cleaning Materials

• Some Hibiscrub for cleaning things down.

Packing Materials

• 26x40cm (ideally ziplock) plastic bags for bagging up 3DVerkstan frames
• Larger than 40cm (ideally ziplock) plastic bags (the 26x40cm bags above includes the bag handle in that dimension) for the laser-cut frames
• Larger than A4 (ideally ziplock) plastic bags for the visors
• Packing boxes (a bit bigger than 40cm)

[afroleft]

To confirm, does:

PLA = Polylactic acid
PETG = Polyethylene terephthalate

[amcewen]

@afroleft yes. PLA is the most common 3D printing plastic, so we've a bunch of reels of it in the space already. PETG is less common but also quite widely used. We have printed it in the past on the Ultimakers but don't have any in right now. I have one reel of it, which is 1.75mm diameter and so no good for the Ultimaker 3D printers we have (they use 2.85mm diameter filament). @ajlennon and @MatthewCroughan have some Creality printers (which usually also live in DoES, right now they've got them at home due to the lockdown, but they're available) which take the 1.75mm filament, and I think @MatthewCroughan is seeing how they fare with the PETG.

[afroleft]

Are you able to share the specific thickness and dimensions you’re looking out for?

[ajlennon]

Very good point @amcewen - I'd meant to highlight that and it slipped my mind

@afroleft background is there are two standard sizes for filament for 3D printers. The difference is the diameter of the filament. Ultimaker printers (of which DoES has two) and no doubt others take a 2.85mm diameter filament. Creality printers (of which I have two and @MatthewCroughan has one) take a 1.755mm diameter filament. So those two filament sizes are what we need. And how much we need of each type depends on the kinds of printers used, which is bit of a "how long is a piece of string" question unfortunately.

Recapping:

There are two different diameters of filament

• 2.85mm (e.g. Ultimaker printer models)
• 1.75mm (e.g. Creality printer models)

I'll update the description at the top

[AMc edit: the Ultimakers are picky about their filament diameter. Lots of "3mm filament" is actually 2.85mm, but some isn't]

[afroleft]

OK, update on the sourcing side of things:

1. Setup a Simple CRM over in a public Trello board to keep track of prospects https://trello.com/b/Pvix5mtF
2. @DuncN is going to jump in and help us out here
3. Linked Astrazeneca with @ajlennon who have a significant amount of the material we need. they have questions so setting up a call
4. Instead of explain what we are doing again and again, I pulled together a quick post with what's happening big picture (link). @amcewen @ajlennon have used your images—let me know if that is not ok.
5. Setup a contact form for anyone who can help supply us with materials (link)

[ajlennon]

Thanks so much @afroleft - for the avoidance of doubt during this time you're welcome to make use of anything relating to me and I'll trust your judgement!

Will share your post and contribution link. Great work!

[afroleft]

|>Edit: Alex - this is quite expensive. See my link at bottom of this comment

30% off PETG here https://www.filamentive.com/

With this code: PPE30

Also: https://www.uofmhealth.org/news/archive/202003/u-m-asks-community-donate-gear-protect-health-care-workers#faceshield

Specifically:

Order of preference for material:

Most preferred: PETG
Second choice: PLA
Third choice: ABA
The ancillary 3D-printed piece at the bottom of the shield is unnecessary.

Edit: Alex this looks a great price. @amcewen ? @JackiePease ?

https://www.amazon.co.uk/BQ-PET-G-Pure-White-1kg/dp/B07VC45RJQ/ref=sr_1_27?dchild=1&keywords=petg+filament&qid=1585518590&sr=8-27

Jackie: that does look like a good price 3dgbire.com selling Fillamentum - admittedly a good make - at £20 for 750g

[ajlennon]

Fantastic - just got off a call with @amcewen and @JackiePease and their advice was same, i.e. preference is for PETG