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The barrier performance of common plastic film(PET,PVC,PE,BOPP,PA)

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The barrier performance of common plastic film(PET,PVC,PE,BOPP,PA)

The barrier performance of plastic is assigned to describe the ability of plastic film or enclosures to barrier the transmission of small molecule gas (such as O2,CO2,N2), water vapor, fragrance and other organic solvents. The index of this barrier ability is calculated by the transmission volume or weight of certain kind of small molecule substances through a certain thick plastic film under some certain pressure, temperature and moisture per minute per square meter. The lower the transmission rate, the better the barrier performance. Below is the Oxygen Transmission Rate and Water Vapor Transmission Rate of common used plastic film.

Oxygen Transmission Rate and Water Vapor Transmission Rate of common used plastic film

Item

Gas Transmission Rate/(cm3·m-2·d-1)

Moisture Transmission Rate g·m-2·d-3

O2

C02

N2

Low density polyethylene

(LDPE)

4000

1400

18500

18

High-density polyethylene (HDPE)

600

220

3000

5~10

Polypropylene (PP)

860

200

3000

19

Oriented polypropylene (BOPP)

550

100

1680

9

Polyvinyl chloride PVC(rigid)

150

56

442

40

Polyvinyl chloride PVC(soft)

320

80

790

Polystyrene(PS)

5500

880

14000

110~160

Polyester (PET)

60

25

420

27

Polycarbonate (PC)

200

35

1225

Polyving akohol (PVA)

7

10

Polyamide (PA)

60

16

253

300

Oriented polyamide (BOPA)

20

6

79

145

Polyvinylidene chloride (PVDC)

15

2.2

70

1.5~5

 

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