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Is X-ray rubber protction curtain safe?


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Tran Cuong

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Posted 20 January 2020 - 08:32 AM

My factory are using Xray Machine, the model IX-GN-4043 OF ISHIDA supplier.
The customer from japan request do not allow screen product without bag because the rubber protection curtain consists of lead (Pb) and the product maybe polluted by lead which doesn't japanese food safety.
My question: Is it correct information?
As specification of xray machine, the material of curtain is tungsten. Is is safety or not?


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GMO

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Posted 20 January 2020 - 12:19 PM

If it says the curtain doesn't contain lead then I guess there's no problem but it is very unusual to pass product through an x-ray before packaging.  I'd question whether an x-ray is sufficiently cleanable for it to be used in this way.  Could you locate it after packaging?



pHruit

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Posted 20 January 2020 - 02:40 PM

I'd echo GMO's comment that it might be worth looking at whether you can x-ray the product once packed.

I think it is probably also worth locating a copy of the detailed specification for the manual, which will hopefully confirm the coating used for the curtain, as presumably it isn't raw tungsten (the bit that provides the actual shielding) and it is thus not the metal that would be making contact with open product anyway? If you can find that then it will help you in your discussions with the customer, as I'd suggest talking it through with them - always easier to reach an agreement if you fully understand their requirements and they fully understand your process ;)



Kiran

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Posted 28 January 2020 - 09:31 AM

If the machine supplier says curtains are not safe for food contact, then it should be considered same.

 

In reference to comments on inspection prior to packaging - there are x-ray inspection systems available in the market, designed to handle unpackaged products.  It's not only about curtains, but the machine should have suitable hygienic design.  Requirements may vary depending on whether inspecting dry agricultural products like cereals or meat & poultry products or dairy products etc.



Tran Cuong

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Posted 12 February 2020 - 11:01 AM

If the machine supplier says curtains are not safe for food contact, then it should be considered same.

In reference to comments on inspection prior to packaging - there are x-ray inspection systems available in the market, designed to handle unpackaged products. It's not only about curtains, but the machine should have suitable hygienic design. Requirements may vary depending on whether inspecting dry agricultural products like cereals or meat & poultry products or dairy products etc.

Thank you for your opinion


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Dave Lenef

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Posted 13 February 2020 - 10:07 PM

I work for an x-ray machine manufacturer. We do not recommend curtains with raw food products for two primary reasons:

  • The curtains are made with lead for x-ray shielding, so we do not want to risk contaminating the food product.
  • The curtains can disrupt the flow of products passing through the system.

The machines we make for raw/bulk applications use the following curtain-free methods to block x-ray emissions:

  • Inclined entry & exit conveyors to block line-of-sight to the x-ray beam
  • Drop-in hopper to feed the entry with drop-down to the exit conveyor.
  • Entry and exit extensions covers to move the openings far enough away from the x-rays to the point of safe emissions.

Hope that helps.



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