6 replies to this topic

[Jenny]

Dear Packaging Engineer:

Can anyone help me with specify what number after the material layers means?

Structure for laminate pouch is PET 12/NY 15/AL 9/SPE 75?

Please kindly advise.

Thank you very much,
Jenny

[MartLgn]

Jenny.

It looks like the missing units are most likely microns (.001 mm = 1mu), at least all material thickness on packaging laminates I am aware of are expressed in microns.

Hope this is some help.

[YongYM]

Dear Jenny:

MartLgn is correct.

Each number represents the thickness of the particular film in micron. The total thickness of the packaging will be at least (12 + 15 + 9 + 75) micron as adhesive is applied within each layer.


Regards,
Yong

[Jenny]

Dear MartLgn and Yong:

Thanks for your fast answer. I do have further question. Do you have any idea, how are we make sure if this structure is acceptable to EU regulations?

Please kindly advise.

Thank you very much,
Jenny

[YongYM]

Dear Jenny:

I am not too sure with the acceptance of EU regulations. However, in my opinion, you may send your film sample to external lab for leach test. You can also test for the presence of plasticizer, solvent e.g. xylene, toluene etc. Please check with your supplier the type of adhesive, ink they use. If possible, also ask them to supply you with the above mentioned test results before you start to use the mentioned packaging material.
[Jenny is from US and I think there are a lot of competence testing laboratories there, right?]


***Any expert out there please correct me if my answer is misleading. TQ.

Regards,
Yong

[MartLgn]

Jenny.

There are several regulations that are applicable to such packaging in the EU.

1935/2004 is a broad framework.

2002/72/EC specifies those plastics that may be used. the overall and migration limits. This is a nightmarish document for anybody without a Doctorate in Polymer science so I would suggest in the first instance you get your supplier to provided certification that the laminate meets the requirements of these regulations and maybe as Yong suggested have your own analysis carried out to verify this (unless of course you have a doctorate in polymer science in which case I humbly apologise and ask you to explain it all to me )

[okido]

Hi Jenny,

You should ask your supplier a certificate of conformity and a migration test report against EU regulations.
In this documents all regulations that apply should be listed, makes verification for you easier.
These documents state what is in the laminate, this can be verified by an indepented labo if you like.

Thickness is not only expressed in microns but some suppliers use film gauge.


Regards, Okido