Polymers In Flexible Packaging J R RAIKAR HUHTAMAKI-PPL 27/09/2007

MAN AND NATURE ¾ Nature

provides Abundant Resources to Man’s Needs ¾ Ready to Eat Food -- Fruits and Vegetables ¾ Processed Food By Man ¾ Needs Methods of PACKAGING

MAN AND NATURE ¾ Man ¾ On

emulates nature

ALL fronts

¾ Including

“PACKAGING”

PACKAGING EXAMPLES OF NATURE ¾ Walnuts ¾ Coconuts

PACKAGING MATERIAL - BIODEGRADABLE

OUR ANSWER… ¾ Wooden

boxes ¾ Metal containers ¾ Glass containers ¾ Plastic containers ALL EXCEPT WOODEN BOXES – NON BIODEGRADABLE

FLEXIBLE PACKAGE OF NATURE ¾ Oranges ¾ Sweet

limes

PACKAGING MATERIAL BIODEGRADABLE + MEDICATED

OUR ANSWER…

FLEXIBLE LAMINATES

What is Flexible Packaging? z

Packaging which is not rigid like glass, metal containers.

z

It is a laminate of a combination of layers of Polymers, Aluminium foil & Paper bonded together using adhesives

WHY PACKAGE? ¾ To

deliver items//food//contents to the end user/consumer in the intended quality ¾ To provide required shelf life ¾ Safe delivery ¾ Convenience & ease of use

SOURCE REDUCTION Coffee Pack- 50 gms Glass Bottle Plastic Cap...9.2g Glass Bottle.…180g +Paper Label +Foil. 189.2 gms Rs 5.00

Laminate

2.8 gms Rs 0.82

Another Example.. Milk Powder-500 gms Metal Container 102 gms Rs 7.50

Laminate 7.8 gms Rs 2.05

Materials Involved In Flexible Packaging PET -- 10, 12 micron z BOPP -- 15 to 30 micron z Met PET -- 10, 12 micron z Met BOPP -- 15 to 30 micron z Foil – 7 to 12 micron z PE Sealant – 20 to 140 micron z Paper – Maplitho, Glassine, Kraft z

Barrier - general definition •Many packed products need barrier against oxygen, moisture, light and aroma to maintain their freshness throughout the anticipated shelf life •Balance of: Shelf life – Quality – Cost

Light

OTR

Optical Density cm3 /m2 d bar High Medium Low

WVTR g / m2 d

> 2.8

< 1.0

< 0.5

2.0 – 2.8

1.0 - 10

0.5 – 5

< 2.0

> 10

>5

PROTECTION-BARRIER -Oxygen Barrier ....PET -Moisture Barrier ....BOPP, CPP, HDPE -High Gas & Moisture Barrier (Opaque) .....Foil, Metallised Films -High Gas & Moisture Barrier (transparent) ……PVDC coated films

Barrier…. ¾ ¾ ¾ ¾

High Gas Barrier(transparent) ….Nylon,EVOH Medium light barrier …..White opaque films High light Barrier …..Foil and Metallised films Physical Barrier(puncture resistance) ……Nylon and Polyester

Indicative material characteristics (variation depending on the material thickness) Material EVOH PVDC Aluminum CPET APET PVC PE high density PP ABS PS PE low density

OTR cc/m2/24 h WVTR gr/m2/24 h 0.15 0.5