×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Adhesive detection in waste paper

Adhesive detection in waste paper

Adhesive detection in waste paper

(OP)
Hi,
I am working for a pulp and paper company using waste paper as raw material. In this raw material, the presence of envelops, stickers, "Post-It", etc. are very detrimental for the processing of this raw material. I am looking for a method to get a crude evaluation of the quantity of paper having adhesive on it in a paper bale. A bale represent approximately 1 ton of paper which can contain 0 to 100% paper having adhesive on it. Is somebody knows about technologies or companies specialized in the detection and monitoring of adhesive? Something like online adhesive monitoring for quality control in automated process producing envelops, stickies, "Post-It", etc.
Thanks you for your help,
Nicolas

RE: Adhesive detection in waste paper

You question is unanswerable in one or two lines. There are so many different chemistry's and compositions being used a specific test may not be available. I believe that anyone who has a test or process for removal of adhesives is going to hold it tight the same a any ink removal process.
I know one process that uses a steam autoclave to remove on specific adhesive from paper, but I have no idea what the adhesive is. With help of a chemist you might be able to do and extraction with a pressure cooker and analyse the mother liquor.

I don't know if someone like the Forest Products Lab would have any information on the subject. You might also check the papers from the cellulose to alcohol processes.

I would contact several adhesive makers and ask what their best seller is and is there any specific test you can run. Capital has a very good cross section of adhesive, though not all types.

http://www.capitaladhesives.com/index.php/product-solutions/water-based-compositions#polyvinylacetates

RE: Adhesive detection in waste paper

Clipped my response short.
What specific adhesive gives you the most trouble?

If this known or can be determined you could specifically target it in an extraction process either for the lab or in a process line.  

RE: Adhesive detection in waste paper

(OP)
Hi unclesyd,
Acrylate type of adhesives is giving us most of our troubles. I am not looking for a process to remove adhesive in the pulp line process. I am looking a way to do a quality control of the incoming waste paper entering the mill. I can't do extraction, it is too time consuming and the quantity of paper needed to be representative of the bale is too large. I was thinking of something like a camera system (FTIR, RAMAM, ...) or other spectroscopic method which are fast, non destructive and easy to use by operators. This is why I was asking about online quality control techniques used by industries applying adhesive I could use or start from for my application.
We receive hundreds of bale per day which are processed quickly. It is not realistic to think to have a technician doing laboratory testing on each bale.
Thanks a lot for your help, it is very appreciated,
Nicolas

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

eBook - The Future of Product Development is Here
Looking to make the design and manufacturing of your products more agile? For engineering and manufacturing organizations, the need for digital transformation of product development processes just became more urgent than ever so we wanted to share an eBook that will help you build a practical roadmap for your journey. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close