ROHS Certificate

It depends on so much you haven't told us.

I've done it both ways, depending on the customer.

You might have to "qualify" the same material for different government entities, as I've had to. Others don't care.

What does the contract specify? Where's the customer located?

Are you looking for general tutoring on ROHs requirements?

lynn,

Actually the customer just requires the ROHS lab test data to confirm that the molded material meets the ROHS ppm limit.

What i want to know is, whether the raw material (pellet form) ROHs data would suffice?

Would the be are difference in the ppm numbers between raw and molded part?

Heating Nylon to a point where you could mold it would not alter the constituent material, except to age it slightly.

You say, "Actually the customer just requires the ROHS lab test data to confirm that the molded material meets the ROHS ppm limit."

That implies that a test will be required since your supplier's data is for un-molded material.

Without knowing more than I do now, how can I say?

Are you adding anything to the pellets during melt? Colorant maybe?

well its 100 percent virgin material used.

Well, are you adding anything to the 100 percent virgin material during melt?

Nothing added, dye or coolant or anything of that sort/

Lynn

The customer MAY not be always be right. What i wanted to know for knowledge sake is if i use 100 percent virgin material without any other additives, would it change the ppm values from its pellet form and assuming that the MDS data are all followed as per the engineering plastics supplier.

thanks

Using 100% virgin Mercury or Plutonium will violate ROHS requirements. I hope that you understand now how useless your information is to answer your question.

Your client must be absolutely sure that the parts you supply are ROHS compliant. The polymers must be heated to a high temperature for molding, and sometimes a certain degree of degradation occurs, you can detect it by a peculiar smell from the moulding machinery. This degradation may generate new, non compliant compounds not originally present in the virgin material.

For fire retardation purposes, some bromine compounds are added to "virgin" polymers used for electrical parts; some of these bromine compounds like PBBS (Poly Brominated Biphenyls) are not ROHS compliant. PBBS shall be considered very seriously since extremely small contents in the order of parts per billion have strongly adverse effects to health.

Recommendations: a) Ask your supplier to submit you a copy of the certificate of his lab and his ISO 9000 and ISO14000 certificates; show these documents to your client for his acceptance. b) Send some samples of virgin pellets and molded parts to a certified lab to confirm the reliability of the supplier's certificate, just to be on the safe side. c) Obtain the ISO 9000 AND 14000 certificates for your operations. otherwise, any compliance claims can't be believed.