Removing Enamel Coatings from Wires

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Will u pls tell me what is this

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see if you can buy the nickle wire with solderable polyurethane wire enamel.

It is self fluxing when soldered. Most specialty wire makers make wire coated with it, just ask. If not you might be able to flame strip the wire and burn off the coating with a temp good enough to burn the insulation off and not melt it..

http://www2.dupont.com/Electrical_Insulation_Systems/en_DE/products/Wire%20Enamels/product%20template/Polyurethane.html

Thank you.
We have already purchased the wire. Second option i had tried. We have to remove the enamel and soldered this wire to chip. After burning the enamel I observed that solderablitiy was very poor. I cleaned this wire in TCE (tetrachloroethylene) after I am not able to solder it with chip. Please suggest what to do next.

There are some enamels for high temperature that will not strip with solvents. We have used formic acid but it requires very careful handling. Another option we have used is a high temperature (~1000F) solder pot. This is probably safer than flame and you won't have the oxidation issues a flame would cause but you then get a tin or solder coated end on the wire.

Thank you.
It is a mass production thats why we can't use hazardous substance. We have to remove the enamel and solder this wire to chip. We are using 325 C solder pot only. I exposed wire to 1000 C heated ceramic body. Enamel burnt but after burning I observed that solderability was very poor. I cleaned this wire in TCE (tetrachloroethylene) after that I am not able to solder it with chip. Please suggest what to do next. After burning the residue will separate from wire or it will stick with wire? If it will stick than it will create problem during soldering.

The coating will most likely burn off since if it were meltable it would likely be removable with a solvent. If you burn it off with a high temperature solder pot then the immersion in the solder will reduce the oxidation. If you use the solder pot to get off the coating, then abrade to clean, dip in liquid soldering flux (many types available to try with varying levels of activity) then tin the wire in the lower temperature pot it might get you to where you need to be.

Nickel is not as solderable as copper under the best of conditions. You need to be using an activated rosin flux, preferably an acid flux. Try mechanically abrading the insulation from the wire and soldering it before you decide that thermal or chemical stripping reduces the solderability.

We have used a D series stripper with wire wheels quite successfully. Works quickly and is rather nasty in its operation. Does a great job and NO chemicals.

Soak the wire in methyl ethyl ketone (MEK) after a short period of soaking it should just wipe off. It will soften and start to disolve if you leave it in awhile and be patient.

Laser wire stripping is fast, clean, and effective.

We use a hot salt stripper for our wires. There are many manufacturers.

From waage electric page:

Removes coatings from magnet wire in seconds. Removes polyvinyl, polyurethane and nylon, polyimide and polyamide-inide insulations rapidly. Removes all types of insulations or coatings from copper wire or copper-clad aluminum wire. When required, this pot will reach and operate at 1000 degree F.

Do you know what type enamel materials is you can dissolve this at high temperature solder bath generally 500C non reactive melt solder will clean and remove enamel.

Other is to test out following

1. MEK (methyl ethyl Ketone)

2. Acetone

3. Carbatol

4. Nikane

One of the above solvent will be good to do the job as long as you control the speed. For further input contact Global Applied Materials at Chennai there web address is www.globalappliedmaterials.com and they may also help. My email is Masyood@gmail,com and if you need more feel free to contact me.

Paritosh pawan

I would suggest you to try STRIPPER solvent used for removing hardened photo emulsion coating from Nickel rotary screens of printing machines for textiles. Being in Bangalore look yellow pages for SUJAY SALES, contact them they can help you for supples. In my experience it is the strongest solvent I have ever used. Beware of handling risks, the slightest contact can peel of your skin since it is so corrosive. Give me feed back so that I can work out a safer thing for you.

Stripper is blend of different types of solvents based on some of the above I mentioned earlier. 75% time it works and do agree with you but other 25% you should not have bad luck. For mass production what you are looking is continuous process and will be based on thermal wire goes from one to another roller or using stripper solvent or your own mix based on what you developed but need to be on line to clean it. Combination of two or more from above will work I am not putting solvent like hydrazine or benzene since this needs extra care and precaution before implementation at least in USA. We have to go extra mile to protect our fellow workers from disastrous effects.

Masyood,

Your view on safety aspect of stripper is welcome. The same had been cautioned in my posting also. Based on the feed back by the poster, we can prepare a workable solvent or chemical systems, since I had developed some safer alternate stripper formulations which are workable.

One more news, there are laser based stripping technologies available now. I think Paritosh Pawan can try that option also.Regards

If they like to work we will help them out. After my Ph.D. I stayed in electronic business long enough in US and have developed a number of stripper solution and bottom line conclusion is it is not an issue to make a continuous process to clean it but it takes time to understand what you have in your hand to clean it and that needs to take the solution dip wire and based on the results have a check and balances which is depended on safety, optimum quality and cost effective and you are done.

As I do not know what he is in I have hard time to guess and put down the list of stripper solution globe has to offer. Every one of us when we develop a solution to remove enamel we want to make that work for all stripping application and we end up send sample left and right in hope one medicine will be cure for cold and cancer both and then if we hit few we get return on investment and not then we made an attempt and keep doing till we get sauces and this this approach I always disliked

Contact Eraser Company Syracuse, NY

800-724-0594

They supply a number of solutions for this type of application. We use one of their machines to strip varnish, enamal, etc.

They will evaluate your material and provide a solution for that application for free.

do you want end of wire to be remove enamel coating ? that wire round shape or strips ? do you want round wire removeing enamel coating. i have air operted gun its use full work

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IECCO is making a product to remove coating from wires. You can try that.