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Topic: Flame retardants in Arduino & Arduino modules ect (Read 534 times) previous topic - next topic

Paul__B

I think what you eat from the supermarket would be far more of a worry!  :smiley-eek:

Let alone the burger shop (of whatever name).

Paul_KD7HB

Your printed circuit boards are made of many very thin layers of fiberglass that are impregnated with epoxy and then cured under high pressure and heat. The flame retardent is in the epoxy material. There is NO standard as to what that retardent might be. It only has to pass test the qualify for a FR4 designation. And who knows if the Chinese circuit boards you get even pass the test.

Paul

JohnRob

For your concern, I suggest you search for the MSDS for FR4 circuit board material.
Please do not PM me with thread based messages.  If your thoughts are worth responding,  the group should benefit from your insight.

DrAzzy

The world is full of flame retardants and other things that contain arguably hazardous chemicals. PCBs (printed circuit boards - not to be confused with the class of chemicals called PCBs (polychlorinated biphenyls), which are quite toxic and subject to stringent controls in most countries) are not particularly hazardous.

If you're worried about exposure to traces of hazardous chemicals, worry about BPA (and the similarly toxic analogs used in some "BPA-free" plastics) in water bottles and receipt paper.
ATTinyCore for x4/x5/x61/x7/x8/x41/1634/828/x313 megaTinyCore for the megaavr ATtinies - Board Manager:
http://drazzy.com/package_drazzy.com_index.json
ATtiny breakouts, mosfets, awesome prototyping board in my store http://tindie.com/stores/DrAzzy

xl97

Maybe because this is a forum ABOUT ARDUINO BASED PROJECTS!
fixed that for you.
While the talent here has a knowledge base.....   ultimately this is still an Arduino based forum.
You 'may' get lucky enough to have someone chime in.. but the question is still best asked and served by asking the vendors or the manufacturer directly.....

Paul_KD7HB

#20
Sep 23, 2019, 09:22 pm Last Edit: Sep 23, 2019, 09:23 pm by Paul_KD7HB
IT is actually more complex than asking the manufacturer of the Arduino boards. They most likely buy the completed board from an assembly house. The assembly house in turn, buys the etched/plated circuit board panel from a board manufacturer and added all the components and breaks up the panel into individual circuit boards for the vendor you got the board from.

The business that makes the original panel of circuit boards will have one or more suppliers of board material with copper on one or both sides. That last supplier will be the only one to know what chemical they added to the epoxy to give it the FR4 properties.

Hopeless.

Paul


Added: if you are that concerned, then you need a different hobby.


DrAzzy

Added: if you are that concerned, then you need a different hobby.
And a house far from modern society and free of modern materials.

The flame retardants in circuit boards are nothing to worry about as a source of traces of hazardous chemicals, when you've got flame retardants in your furniture (required by law) and bedding, BPA in your water bottles, liners of canned food, and receipt paper (and the "BPA-free" stuff usually uses BPS or other closely related analog with the same concerns), lead in the water, pesticide residues on produce, etc.
ATTinyCore for x4/x5/x61/x7/x8/x41/1634/828/x313 megaTinyCore for the megaavr ATtinies - Board Manager:
http://drazzy.com/package_drazzy.com_index.json
ATtiny breakouts, mosfets, awesome prototyping board in my store http://tindie.com/stores/DrAzzy

ballscrewbob

@Imim

Topics merged.
Please read this first.

Further infractions may lead to a timeout.

Bob.
It may not be the answer you were looking for but its the one I am giving based on either experience, educated guess, google or the fact that you gave nothing to go with in the first place so I used my wonky crystal ball.

Grumpy_Mike

The RoHS legislation banned certain flame retardants
https://en.m.wikipedia.org/wiki/Restriction_of_Hazardous_Substances_Directive

So you can ask if the PCB is RoSH compliant.

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