Material Properties and Conversions

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Our practical “First Aid” provides fast and reliable information about the properties and qualities of a large number of raw materials as well as typical material combinations. It can be used for flexible packaging for food, pharmaceuticals, hygiene, cosmetics, industrial chemical and agriculture. However, with all its information our “First-Aid” cannot and does not replace a visit by a Selig Flexibles customer consultant. We create a custom solution for each new application – in close cooperation with you. And this process starts with a personal discussion.

 

Yield

Material

Spec. Weight

Micron

7

8

9

12

15

20

23

30

40

50

Alu

2.70

g/m2
m2/kg

18.9
52.9

21.6
46.3

24.3
41.2

32.4
30.9

40.5
24.7

54.0
18.5

62.1
16.1

81.0
12.3

108.0
9.3

135.0
7.4

HDPE

0.95

g/m2
m2/kg

6.7
151

7.6
132

8.6
117

11.4
87.7

14.3
70.2

19.0
52.6

21.9
45.8

28.5
35.1

38.0
26.3

47.5
21.1

LDPE

0.92

g/m2
m2/kg

6.4
155

7.4
136

8.3
121

11.0
90.6

13.8
72.5

18.4
54.3

21.2
47.3

27.6
36.2

36.8
27.2

46.0
21.7

OPP
foamed

0.75

g/m2
m2/kg

5.25
190

6.0
167

6.75
148

9
111

11.3
88.8

15
60.6

17.3
57.9

22.5
44.4

30
33.3

37.5
26.6

OPP transparent

0.91

g/m2
m2/kg

6.4
157

7.3
137

8.2
111

10.9
91.6

13.7
73.3

18.2
54.9

20.9
47.8

27.3
36.6

36.4
27.5

45.5
22.0

PA

1.13

g/m2
m2/kg

7.9
126

9.4
111

10.2
98.3

13.6
73.7

17.0
59.0

22.6
44.2

26.0
38.5

33.9
29.5

45.2
22.1

56.5
17.7

PET

1.39

g/m2
m2/kg

9.73
103

11.2
89.9

12.5
79.9

16.7
59.9

20.9
48.0

27.8
36.0

32.0
31.3

41.7
24.0

55.6
18.0

69.5
14.4

PVC

1.40

g/m2
m2/kg

9.80
102

11.2
89.3

12.6
79.4

16.8
59.5

21.0
47.6

28.0
35.7

32.2
31.1

42.0
23.8

56.0
17.9

70.0
14.3

Protective properties

WDD at 23 °C and 85% r.F. in g/m2 in 24hr

Comparison of other protective properties

Material / micron

12

15

20

23

30

40

50

GTR Oxygen

Aroma

Fat

Light

HDPE

3.5

2.8

2.0

1.7

1.3

1.0

0.8

LDPE

8.0

7.0

5.0

4.5

3.5

2.5

2.0

LDPE EVOH

unusual

4.0

2.9

+

++

+

foamed OPP

unusual

< 0.9

0.8

0.6

OPP PVDC/Acryl

unusual

1.2

0.9

0.8

0.5

unusu.

o

+

+

OPP met.

<0.16

< 0.16

< 0.16

< 0.16

<0.16

unusu.

unusu.

o

o

+

+

OPP transp.

<2.0

< 1.7

< 1.5

< 1.2

< 1.0

<0.75

unusu.

o

PA

130

100

75

60

50

38

30

+

o

+

PET

16

13

9.5

7.5

6.0

4.8

3.9

o

o

PET met.

< 1.0

unusual

+

+

+

+

PET SiOx

< 0.5

unusual

+

+

+

Alu

< 0.1

< 0.1

< 0.1

< 0.1

< 0.1

<0.1

< 0.1

++

++

++

++

PVC

Available from about 90my: 5.0 g/m2

+

Finished material – typical combinations

Construction Use Impermeability Notes
Paper 60g, Alu 8 my, PE 40 my Sealable bags, hygoscopic products, allrounder WDD: < 0.1 g/m2 O2D: < 0.1 cm3, Aroma: very good Widely used, cost efficient, very low permeability
Paper 60g, PET SiOx 12 my, PE 50 my (LS) sealable bags, block bottom bags, Eco-products WDD: < 0.5 g/m2 O2D: < 2.0 cm3Aroma: good without aluminium, limited light protection, tear notch necessary
PET 12my, PE 75my Tubular bags, refillable bags, liners WDD: < 3.5 g/m2 O2D: < 500 cm3Aroma: average cost efficient, transparent, medium protection
PET SiOx 12myPE 75my Tubular bags, refillable bags, hygoscopic products WDD: < 0.4 g/m2 O2D: < 2.0 cm3Aroma: good good gas barrier, good WDD, no light protection
PET 12my, PE EVOH 75my Tubular bags, refillable bags, vacuum bags WDD: < 2.0 g/m2 O2D: < 2.0 cm3Aroma: very good good gas barrier, good aroma protection, moisture sensitive
PET 12my, Alu 8my, PE 75my Many types of bags, max. impermeability, high strength WDD: < 0.1 g/m2 O2D: < 0.1 cm3Aroma: very good light protection, good presentation, very low permeability
Paper 60g/m2, PVDC 40g/m2 Sealable bags, all applications, all packaging systems WDD: < 0.6 g/m2 O2D: < 10 cm3Aroma: very good low permeability, seals well, fat and aroma good
OPP transp. 20my, OPP met. 20my Reverse printing, minimum package weight, typical for snacks WDD: < 0.5 g/m2 O2D: < 100 cm3Aroma: good cost efficient, light protection, good presentation

Conversion Formula

From Formula (RW = reel width in mm, CL = cut length in mm) To
m2 m2 ÷ RWm2 ÷ (RW x CL)
m2 x kg/m2
m
Pcs
kg
m m x RW
m ÷ CL
m x RW x kg/m2
m
Pcs
kg
Pcs Pcs x RW x CL
Pcs x CL
Pcs x RW x CL x kg/m2
m
Pcs
kg
kg kg ÷ kg/m2
kg ÷ kg/m2 ÷ RW
kg ÷ kg/m2 ÷ RW ÷ CL
m
Pcs
kg

Price Conversions

From Formula To
Fr./100m2
Fr./100m2
Fr./100m2
Fr. x 10 x RW
Fr. x 10 x RW x CL
Fr. ÷ 100 ÷ kg/m2
Fr./1000m
Fr./1000 Pcs
Fr./kg
Fr./1000m
Fr./1000m
Fr./1000m
Fr. ÷ 10 ÷ RW
Fr. x CL
Fr. ÷ 1000 ÷ RW ÷ kg/m2
Fr./100m2
Fr./1000 Pcs
Fr./kg
Fr./1000 PcsFr./1000 Pcs
Fr./1000 Pcs
Fr. ÷ 10 ÷ RW ÷ CL
Fr. ÷ CL
Fr. ÷ 1000 ÷ RW ÷ CL ÷ kg/m2
Fr./100m2
Fr./1000m
Fr./kg
Fr./kg
Fr./kg
Fr./kg
Fr. x kg/m2 x 100
Fr. x 1000 x RW x kg/m2
Fr. x 1000 x RW x CL x kg/m2
Fr./100m2
Fr./1000m
Fr./1000 Pcs

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