Multi-layer high barrier packaging reduces environmental impact

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The function of packaging

PROTECTION

Containing

Preserving Transporting

Informing

Selling

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Barrier properties

BOPP has exceptional moisture barrier compared to other polymer packaging films…

0

5

10

15

20

25

BOPP HPDE CPP BOPET LDPE

WVT

R (g

/m2 d

)*

Film Type * Refers to 25 µm

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Barrier properties

0

2000

4000

6000

8000

EVOH BOPA BOPET BOPP Cast PP HDPE OPS LDPE

OTR

(cm

3 /m2 d

)*

Film Type

…but the OTR is relatively poor.

* Refers to 25 µm

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Barrier properties

OTR can be improved by metallisation but sometimes a transparent or ultra high barrier film is needed.

0

10

20

30

40

MetallizedBOPET

PVOH-coatedBOPP

MetallizedBOPA

PVdC-coatedBOPET

PVdC-coatedBOPP

PVdC-coatedBOPA

MetallizedBOPP

SealablePVdC-coated

BOPP

OTR

(cm

3 /m

2 d)

Film Type

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Sustainability

Packaging design: • Type of materials • Process • Weight and volume reduction • Environmental impact Prevention includes all measures aimed at reducing environmental impact.

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Potentials to Reduce Environmental Impact Energy saving CO2 reduction

Saving of raw materials

Reusable packaging

Use of recycled materials

Optimisation of logistics

Facilitation of recycling

Simplification of the packaging structures

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Product Range Aesthetical Aspect Thickness (µm) O2TR (cm3/m2 d) Note

MULTILAYER FILMS Single Web Structure and/or Lamination transparent 20/30 ≤ 15 MST = 105°C

transparent 30 ≤ 3 Al replacement

metallised 20/30 ≤ 15 WVTR = 0.30

metallised 30 ≤ 3 WVTR = 0.30

MULTILAYER FILMS Single Web Structure and/or Lamination, White Voided white voided 35 ≤ 15 MST = 105°C

white voided metallised 35 ≤ 15 WVTR = 0.40 MULTILAYER FILMS Flow Wrapper Film – Horizontal, Vertical

transparent 35 ≤ 25 MST = 85°C

transparent 30 ≤ 10 Enhance seal, PE

transparent 30 ≤ 10 Enhance seal, PP MULTILAYER FILMS Tray Lidding

transparent 30 ≤ 10 Heat sealable, PE

transparent 30 ≤ 10 Heat sealable, PP

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Key applications

Lidding Films

Flow Wrap Films

Easy Printing and Lamination

High Barrier Triplex Replacement

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Technology Skin layer

PP Homopolymer

Barrier layer

PP Homopolymer

Skin layer

• OTR: 3 – 15 cm3/m2 d • chlorine free • easy lamination and printing like standard BOPP

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Properties

Outstanding flavour barrier

740

720

670

50

200

260

55

50

1650

450

452.5

50

10

10

10

50

0 200 400 600 800 1000 1200 1400 1600 1800

limonene (lemon)

2-acetylpyridine (bread)

dipropil disulfide (garlic)

4-hydroxy-3-methoxybenzaldehyde

(vanilla)

TR (mg/m2 d)

EXTENDO XTMH 20 µmBOPP 20 µmAcr/PVdC coated BOPP 21 µmAcr/Acr coated BOPP 30 µm

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Properties

OTR after pasteurization of a single, non-laminated film EXTENDO XTMU 30 for 60 minutes at 80 ̊C in an autoclave

Oxygen transmission rates at 23 ̊C, 50 % RH Fraunhofer IVV Freising, September 2011

OTR

(cm

3 /m2 d

)

Before pasteurization OTR = 2,5 cm3/m2 d

4 hours after pasteurization OTR = 5 cm3/m2 d

Time (h)

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Properties

In contrast with coated BOPP films, the OTR is not influenced by scratches, wrinkles or abrasion.

0.0

2.0

4.0

6.0

8.0

10.0

Intact Wrinkled

OTR

(cm

3 /m2 d

)

HIGHER

PROTECTION +

= SUSTAINABLE

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Properties

In comparison with other high gas barrier films, the unit weight of the packaging can be decreased.

PROTECTION

+

= SUSTAINABLE

Unit weight (g/m2)

18,2

19,8

19,5

17,1

22,8

22,8 33.0

21.0

28.0

0.1

7.0

15.0

0 10 20 30 40

PA cast 20 μm

BOPA 20 μm

BOPA 15 μm

EVOH coated BOPET 14 μm

PVdC coated BOPET 14 μm

EXTENDO XTMH 20 μm

OTR (cm3/m2 d)

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Properties

In contrast with other high gas barrier films, the thickness of the film does not have influence on the gas barrier properties.

15.0 15.0 15.0

35.0

28.0

21.0

17.0

33.0

22.0

16.0 13.0

0

5

10

15

20

25

30

35

40

0 5 10 15 20 25 30 35 40 45 50 55

OTR

(cm

3 /m2 d

)

Thickness (µm)

EXTENDO XTMH

BOPA

PA cast

PROTECTION

+

= SUSTAINABLE

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Properties • Cardboard packaging is usually made of recycled paper (mostly newspaper)

that contains mineral oil residues from printing inks. • Mineral oil residues can migrate from cardboard into food. • Most of the plastic linings (PP or PE) in the bag-in-box systems in use today

do not provide sufficient protection. • PET and PLA have „natural barrier“ • EVOH has an excellent barrier against mineral oils Film type Breakthrough period on 23°C LDPE 100 μm < 10 hours

BOPP 30 μm < 2,1 days

EXTENDO XTMH 30 μm > 2,5 years

PET > 3 years

Al foil > 3 years

BOPLA 20 μm > 3 years

HIGHER

PROTECTION +

= SUSTAINABLE

Source: BASF measurements and results from Grob,K et al, Kantonales Labor Zürich, April 2011

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Properties – horizontal flow wrapping

0.00

1.00

2.00

3.00

4.00

5.00

6.00

80 85 90 95 100 105 110 115 120 125 130 135 140

F max

(N)

Temperature (°C)

EXTENDO XFWL

EXTENDO XTMH

0.00

1.00

2.00

3.00

4.00

5.00

6.00

80 85 90 95 100 105 110 115 120 125 130 135 140

F max

(N)

Temperature (°C)

EXTENDO XFWL

EXTENDO XTMH

HOT - TACK

SEAL STRENGTH

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Properties – tray lidding

• Film for thermoforming, PE/APET: 270 µm • Film for lid, PVdC coated PET/PE: 70 µm

3900 4228

0

500

1000

1500

2000

2500

3000

3500

4000

4500

EXTENDO XLDM 30 µm Film for lid 70 µm

Seal

str

engt

h (g

/25

mm

) PROTECTION

+

= SUSTAINABLE

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Case study: fresh pasta packaging – VFFS

PA 15 µm PP Cast 75 µm

Traditional structure

EXTENDO XTMH 20 µm PP Cast 70 µm

New structure

+

= SUSTAINABLE

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Case study: walnuts

BOPP 30 µm PE//EVOH 60 µm

Traditional structure

EXTENDO XTMH 20 µm PP Cast 60 µm

New structure

PROTECTION

+

= SUSTAINABLE

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Case studies: biscuits

BOPP matt 20 µm EXTENDO XTMH 20 µm

PP Cast peelable PROTECTION

+

= SUSTAINABLE

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General information

The O2TR and WVTR measurements shown in this presentation are all carried out under the below conditions:

• O2TR • Unit: cm³/m² d • Test Conditions: 23°C – 0% RH • Method: ASTM D 3985

• WVTR • Unit: g/m² d • Test Condition: 38°C – 90% RH • Method: ASTM F 1249