SoarnoL™ EVOH (ethylene vinyl alcohol copolymer) is a world renowned gas and hydrocarbon barrier resin used in multilayer barrier packaging.

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Characteristics

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SoarnoL™ is the trade name of ethylene-vinyl alcohol copolymer (EVOH), developed by Nippon Gohsei through years of research.
SoarnoL™ combines the gas barrier properties, oil resistance, and transparency of polyvinyl alcohol (PVOH) with the water resistance, extrudability, and other properties of ethylene components.

Molecular Structure of "Soarnol™"

 [CH2CH2]m[CH2CH(OH)]n

Oxygen Barrier Property

OTR of "Soarnol™" film and other film samples is shown below.

Sample

OTR
cc・20μ/m2・day・atm

Soarnol D,DT(29mol%)

<0.1

Soarnol DC(32mol%)

0.1

Soarnol E,ET(38mol%)

0.4

Soarnol A,AT(44mol%)

1.3

LDPE

7,900

HDPE

3,600

Polypropylene(PP)

3,900

Biaxially Oriented PP

2,300

Biaxially Oriented PS

3,900

Polycarbonate(PC)

4,500

PVC :Rigid

130

PVC(DOP=30%)

2,000

Extrudable high barrier PVDC

3

PET

69

Polyamide(Nylon6)

76

Biaxially Oriented Nylon

23

Modified Polyacrylonitrile

16

 Biaxially Oriented PVA

<0.10

Chemical resistance of "Soarnol™"

Chemical resistance of "Soarnol™"

Safety

All Soarnol grades do not contain heavy metals such as cadmium and lead, or any toxic substances. In terms of molecular structure, "Soarnol™" is composed primarily of carbon, oxygen, and hydrogen, and when burned it emits primarily carbon dioxide and water vapor. It does not include harmful components that produce dioxins or other environmentally damaging substances.

Applications

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"Soarnol™" has a wide range of applications that include food packaging films, bottles, and tubes to preserve the flavor and freshness of food products, and construction materials, plastic fuel tanks, and other non-food products.

  • Films
  • Blow molded bottles
  • Extruded tubes
  • Cups & trays
  • Retort pouches
  • Pipes
  • Extrusion coatings
  • Coinjection
  • Plastic fuel tanks

Lineup / Specifications

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Standard Grades

The oxygen barrier properties of SoarnoL depend on ethylene content and humidity. The most suitable grade for a given purpose can be determined according to application and manufacturing process.

 

D2908

DT2904

DC3212

DC3203

E3808

ET3803

A4412

AT4403

Ethylene content

mol%

29

32

38

44

Density

g/cm3

1.21

1.19

1.17

1.14

Melting point *1

188

183

173

164

Crystallization temp. *1

163

160

152

144

Glass transition temp. *1

62

61

58

55

MFR*2

g/10min

8

3.8

12

3.8

8

4.0

12

3.5

OTR*4

cc・20μm/m2・day・atm

0.2

0.3

0.7

1.5

cm3・20μm/m2・24hrs・MPa

2

3

7

15

Manufacturing
process

Blown film

 

 

 

 

Cast film

 

 

 

 

Sheet

 

 

 

 

Bottle

 

 

 

 

 

Pipe

 

 

 

 

*1: Measured with DSC
*2: 210 deg C (410 deg F), 2160g
*3: 20 deg C, 65%RH

*The above figures are representative values and are not guaranteed.

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