Multiwall Barrier Properties

 

 

Typical Properties of Barriers Used in Multiwall

and Consumer Bags (cont.)

 

 

 

Barrier

 

 

WVTR (a)

 

 

02TR (b)

 

 

Odor Barrier

 

 

Grease Barrier

 

 

Heat Sealable

 

Saran Grades (Coated and Coextruded)

Polypropylene (Saran Coated)

0.70 MIL C1S

 

0.50

 

 

3-5

 

 

Excellent

 

 

Excellent

 

 

Yes

 

0.75 MIL C2S

 

0.45

 

 

3-5

 

 

Excellent

 

 

Excellent

 

 

Yes

 

1.00 C2S

 

0.30

 

 

1-3

 

 

Excellent

 

 

Excellent

 

 

Yes

 

Saranex (PE/Saran/PE)

Saranex 5 (1.25 MIL)

 

0.50

 

 

2.0

 

 

Good

 

 

Excellent

 

 

Yes

 

Saranex 10 (1.5 MIL)

 

0.40

 

 

1.5

 

 

Good

 

 

Excellent

 

 

Yes

 

Saranex 14 (2.0 MIL)

 

0.20

 

 

0.50

 

 

Excellent

 

 

Excellent

 

 

Yes

 

Saranex 15 (3.0 MIL)

 

0.15

 

 

0.30

 

 

Excellent

 

 

Excellent

 

 

Yes

 

Specialty Grades

Nylon (Mono or Biaxially Oriented)

0.48 MIL

 

2.40

 

 

2.7

 

 

Fair

 

 

Fair

 

 

No

 

0.60 MIL Saran Coated

 

0.70

 

 

0.5

 

 

Excellent

 

 

Excellent

 

 

Yes

 

Polyester Film (Mylar)

0.48 MIL

 

2.8

 

 

9.0

 

 

Good

 

 

Excellent

 

 

No

 

0.75 MIL

 

1.9

 

 

7.0

 

 

Good

 

 

Excellent

 

 

No

 

0.92 MIL

 

1.3

 

 

5.0

 

 

Good

 

 

Excellent

 

 

No

 

Metallized Film

0.5 MIL Mylar (DuPont 50 MMC)

 

0.04

 

 

0.01

 

 

Excellent

 

 

Excellent

 

 

Yes

 

0.8 MIL Polypropylene (Normet 380)

 

0.07

 

 

4.00

 

 

Good

 

 

Good

 

 

Yes

 

1.0 NIL Nylon

 

0.50

 

 

0.07

 

 

Good

 

 

Good

 

 

No

 

Valeron

2.5 MIL

 

0.25

 

 

90

 

 

Fair

 

 

Good

 

 

No

 

4.0 MIL

 

0.15

 

 

60

 

 

Fair

 

 

Good

 

 

No

 

Cellophane (Saran Coated)

1.0 MIL

 

0.50

 

 

0.8

 

 

Excellent

 

 

Good

 

 

Yes

 

Glassine

57# Wax Laminated

 

1.0-2.5

 

 

2-5

 

 

Good

 

 

Excellent

 

 

No

 

 

 

(a) Water Vapor Tranmission Rate in g/100 in2/24 hours (ASTM

E-96)

(b) Oxygen Gas Transmission Rate in cc/100 in2/24 hours/atms

(ASTM D-1434)

 

Source: Smurfit-Stone Bag Packaging Division