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About the materials structure of flex packaging

Nov 01,2019 | Views: 16

As I mentioned earlier,no matter what kind of presentation to be(flexible pouches or flexible film),the first thing it must be figured out is all of them is impossible to be formed by a single layer packaging materials,but formed by the multilayer

Basically,each kind of material structure of flex packaging is divided into below three structure layers,that is the printing layer,barrier layer and contact layer

1-Printing layer

Usually,it is presented as the single layer,used for the printing of packaging surface

2-Barrier layer

Usually,it is presented as the single layer or the multilayer,used for some certain purpose,such as barrier of oxygen, moisture,ultraviolet ray and etc

3-Contact layer

Usually,it is presented as the single layer,used for directly contacting with the packaging content

materials structure of flex packaging

Printing layer

Barrier layer

Contacted layer

PET

BOPP

Nylon

……

AL

AL/Nylon

Metalized-PET

Kraft paper

Kraft paper/AL

……

LLDPE

CPP

EVA

……

Surely,it doesn't means all the packaging materials can be freely collocated together,but as per some fixed calculation formula,and these formula has been proved by a long term practice




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