Summary for food grade polymer coating Discussion
food grade polymer coating is discussed as a possible way to line anodized aluminium and stainless steel for a tobacco-industry box, but Ted Mooney questions whether the stainless steel actually needs coating at all. Glenn Parks asks if a polymer layer could prevent the metals from changing the tobacco’s characteristics. Ted says he is sure food-grade polymers exist for stainless steel, but notes that stainless steel is already widely used in supercritical pharmaceutical manufacturing, and that hard chrome plating is used on packaging machinery exposed to chewing tobacco and snuff. He adds that, to his knowledge, polymer coatings are not used in those applications, so he does not see why the stainless needs to be coated. The practical takeaway is that coating may be feasible, but the need for it is not established in the thread.
Q. I am very interested to know if it is feasible to coat anodized aluminium and stainless steel with a polymer coating?
I am looking to manufacture a product for the tobacco industry and the inside of the box needs to be coated with a polymer to ensure that the characteristics of the metals we are using do not change the tobacco in any way.
Thank you in advance for any help you can offer.
Glenn Parks
buyer – Sydney NSW Australia
May 10, 2010
? Hi, Glenn. Although I am sure that there are food grade polymers that can be applied to stainless steel, why are you expecting tobacco products to be unaffected by polymers, but to be affected by contact with stainless steel?
Stainless steel is widely used in supercritical pharmaceutical manufacturing, and hard chrome plating is used on the surfaces of packaging machinery exposed to chewing tobacco and snuff, whereas to my limited knowledge polymer coatings are not used in either application. So I am not seeing why you want to coat the stainless. Thanks and good luck.
Regards,
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com – Pine Beach, New Jersey
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May 10, 2010
A. Check out Fusion bond epoxy eg:
Interpon HD 30 marketed through Akzo Nobel in Australia.
Hope this helps
Bill Doherty
Trainer – Newcastle NSW Australia
June 6, 2010
How to coat a polymer coating on the steel surface, their process and technique?
Q. I have to coat a polymer coating on the steel surface which gets properly adhered to the surface and does not wear at the high temperature.
Deepika Chamoli
Student – Dehradun, India
July 23, 2015
July 2015
A. Hi Deepika. It would be conventional to do a zinc phosphate pretreatment on the steel surface to increase adhesion and reduce corrosion before the polymer coating. The polymer coating might involve spraying a powder onto the part, or dipping the part into a fluidized bed of powder, then heating the part to make the powder fuse and flow. But other polymers like polyurethane might be sprayed on or brushed on wet. As a student, are you certain that you understand the question, including the meaning of “polymer”? It’s pretty broad, and you’d probably need to give us an indication of which polymer out of many thousands of possible polymers you are interested in before anyone can tell you the potential application techniques for that polymer. Good luck.
Regards,
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com – Pine Beach, New Jersey
Need quick confidential answers? $25
Need project assistance? $100/hr.