Revisiting Metal Detection in Paper – updated

Mario asks –

I read your post on ASK RAPLH about detecting metal in corrugated. Did you find some solution to detect metals in the corrugated plants? We have had issues that have damaged relationships with some of our customers in the food industry.

I would appreciate your comments.

Update – Click here or scroll down

I just returned from my summer meeting with my technical peers that are members of TAPPI. This was one of the subjects we discussed.

One paper mill system with three 100% recycled fibre machines runs samples from every fourth reel, but has never detected metal from its scanners.

You will need to buy a scanner the same as your customer. You will need to calibrate it according to their sensitivity levels. Make sure you can track the order from the receiving of the sheets from sheet supplier, through your converting equipment/process and all the way to delivery of the finished product to your customers. Once you find the source of the metal and your sheet supplier. Once you identify the source of the metal contamination, then you can address the issue.

If you haven’t read the comments from Bill and Clayton regarding detecting metal please click on this link and scroll down the page. Both gentlemen offer some very good insight based on in-plant experience.

Check with your customer to see what kind of detection system they are using and if the same or similar system may be available to meet your needs.

Update
Dick Lund – RC Lund Consulting.

Metal in paper is usually from virgin paper mills – sloughing off of metal in the machines or poorer fiber cleaning than is used in recycled mills.  Recycled mills are specifically designed to remove metal and other contaminents, virgin – not as well equipped.  Further, testing boxes on line in a box plant may be possible but it is very expense and difficult to execute.  Better to get metal free paper!

 

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