QINGDAO ZCOLOR PACKING

How the aluminum foil is converted into foil bags

By Bruce Dou

Packaging Specialist in China

Qingdao ZCOLOR Packing Co. Ltd

Aluminum foil pouches are widely used for high barrier packaging applications, such as

meat, chocolates, coffee, flavoring etc.

Usually, aluminum foil is considered as absolute barrier to moisture and oxygen even the

actual permeation data will be exactly depending on the pinholes of the aluminum foil. Here

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is a barrier characteristics for aluminum foil and metallized film as below.

Barrier Characteristics

Film Description OTR

(cc/m2/24h)

WVTR

(g/m2/24h)

Aluminum Foil Aluminum foil 0 0

MPET Metallized Polyester 0.95 1.2

However, there are some drawback for aluminum foil

1) Easy tear apart

2) Easy to produce wrinkles under outside factors

3) No seal ability to convert into pouches

So, aluminum foil has to combine with other polymer film to realize its barrier performance

in packaging applications.

Usually, there are several common foil structure listed as below

1) PET//AL//PE (CPP)

2) NY//Al//PE (CPP)

3) PET//Al//NY/PE (CPP)

4) Paper/Al/PE

Please note, all the substrate material have to be food grade and intended for food direct

contact packaging applications.

Then it comes to multilayer lamination, to get the aluminum foil trapped between.

Aluminum foil can be laminated with outside printing substrate by dry lamination, extrusion

coating lamination or wet lamination.

In china, now solvent-free lamination is seldom used for aluminum foil laminate with outside

layer. Usually, solvent lamination is used for aluminum foil laminate with inner seal layer. We

will give a further explanation on this in the future.

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Then this lamination aluminum foil is cured into one whole and ready for pouch converting.

First, the laminated foil roll is uploaded onto the unwinding roller on the bag-making

machine, and when the foil web passes through the rollers, the heat sealer then converted

the foil into pouches

As you can see, the width for the aluminum foil pouch is depending on the effective

converting width of the bag-making machine, and we are able to make aluminum foil

pouches with maximum width 1000mm. Any questions regarding large aluminum foil pouch,

you may reach us for further advices.

Of course, tear notch has to be finalized on cutline of the pouch, that will make easy use at

consumers’ side.

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And this is a standing up zipperlock pouch produced at our plant.

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Aluminum foil coffee valve pouch

And also we are providing retort aluminum foil pouches for food manufacturers, that will

have requirements for the inks, adhesives and substrate materials for the pouch. We will

give a further explanation in the future.

QINGDAO ZCOLOR PACKING

We are a professional producer of aluminum foil pouches located in QINGDAO, CHINA.

Any questions regarding packaging, you may reach us for further ideas.

Contact:

Bruce Dou

Qingdao ZCOLOR PACKING Co., Ltd

Qianhai West, Chengyang, Qingdao, China

Email: bruce.dou@z-color.cn

brucedflex@qq.com

Skype: happbruce2010

Mobile: +86 159 6981 3136

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