Biaxially Oriented PBT Film

BOBLET

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RWhat is BOBLET?
■World‘s first biaxially oriented with PBT film.

■Strength properties are same level as BOPA.
■Heat resistance and acid resistance are same level as OPET.
■Excellent in the isotropic property,
which is feature of our original biaxially oriented Tubular method.

■No differences of quality depending on mother-roll positioning)

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Information about PBT resin■PBT：PolyButylene Terephthalate■ One of the 5 engineering plastics (PBT、PA、PC、POM、m-PPE）

Type of resin

Polyamide

Polyester

Nylon6PETPBT

Density（ｇ/㎡）

1.14

1.40

1.31

Melting Point（℃）

224～227254～258

225～227

Glass Transition
Temp.（℃）

50～60

70～80

30～50

Water Absorption

BigSmallSmall

Acid Resistance×○○

Alkali Resistance○××※DSC method

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Our Tubular biaxially oriented method process
Resin Pellets
Base Film
ExtruderCircular Die

MakingStretching Section(Biaxially Orientation)

Cold Mandrel

Heat Treatment

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Winder3

Comparison of properties (OPBT vs ONY, OPET)◎：Superior in other

Creep test

Easy cuttinghydrogen peroxide

Other Solvent◎△ △ △ ◎ ◎ ◎ △ ○ ◎ ○ ◎○ ○◎◎◎ ○ ◎ ○◎◎PET/Nycoex○ ○ △ ○ ○ △ ◎ ○ ○ ○ ◎○ -△○○ ○ ○ ○◎◎

Food color
resistance

Modulus of elasticity△

Ink adhesion

Dimensional change
by moistureabsorption○ ○ △ ○

Under high humidity△

Normal△Gloss○ △Haze◎ ◎ ○ ○ △ △ ◎ △ △ ◎ ○

Aroma

◎

Water Vapor
Transmission(16μ)

Oxygen◎After Retort○ ○ ◎ △

Abrasion

OPET

Solvent
Resistance

Processability○Flexing(15μ)

COF◎

Needle Strength

ONYTransparency○ ○Strength(15μ)

BarrierResistance△：Inferior in other◎ ◎ ◎ ◎ ○ ○ △ ○ ○ ○ ○ImpactOPBT

Dimensional
Stability

After boiling

PinholeResistance○：same as other(15μ)

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BOBLET(OPBT) Film Properties
OPBT(BOBLET-ST)

ONY(BONYL-RX)

OPET

PET/NY coex

Thickness (μm)

1515

16

15

Haze (%)

5.4

2.6

2.8

4.4

MD

210

280

170

170

TD

220

300

180

260

MD

150

120

100

140

TD

150

120

80

80

MD

3.0

2.2

4.6

2.7

TD

2.9

1.7

4.5

2.6

Impact strength (J)

1.1

1.5

0.5

1.1

Needle strength (N)1011810Gelboflex Test (5℃*40%RH*500times)

11212023

Gelboflex Test (5℃*40%RH*1000times)

1234210110

Tensile strength (MPa)Elongation at break (%)
Young’s modulus(GPa)

Shrinkage in Hot air
150 ℃ (%)

MD

2.4

0.8

1.4

2.0

TD

0.3

0.8

0.0

0.3

Shrinkage in Hot water
100 ℃ (%)

MD

1.6

2.4

1.0

2.2

TD

0.0

2.6

0.0

0.4

Water Vaper transmission rate (g/m2・24hr)

49

310

4287

Oxygen transmission rate (cc/m2・24hr）
23℃*50%RH

110

2381

21

Thickness Grade： 15μ、20μ、25μ5

Pinhole Resistance(Flexing)

Film

500times、1000times、2000times

Number of pinholes
5℃×40%RH

100 over<Flexing>
Confidential※ flexing times：500、1000、2000times(kohjin original method )6

Heat(Retort) Resistance/Humidity Dependence
Before Treatment

Tensile Strength()MPaC.O.F()Dynamic)

After Retort<Tensile Strength Change
Before/After Retort in high temp.><Slippery Test>(humidity dependance)※Retort treatment：135℃×30minutes※Condition：23℃、Film/Film Surface

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7Cold Resistance<Flexing under low temp.> 500times<Impact Strength>2.5Normal

常態-30℃

衝撃強度（J）

Impact Strength(J)

Number of pinholes

2.0

1.5

1.0

0.5

0.0
OPBT（15）**Main Material//LL structureONy（15）

Non-sticking-ice Strength<Ice-peeling strength test)>
Make a film sample with sticking ice at -30℃.
Testing shear peel strength between film/ice

Ice-Peeling Strength

StringFilm

Ice

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Proposal①： Pouched Package for Microwave foodApplications ▶ Curry, Sauce, Soup, etc- Chilled or room temp. food by heating with microwave oven.

Current Structure

VMOPET(12)//ONY(15)//retort CPP(60)Proposed Structurewith BOBLETVMOPET(12)//OPBT(15)//EasyCutting retort CPP(60)■ Improve Microwave-Heating Suitability- Reduce the scattering of the contents due to breaking a pouch during
microwave heating.
■ Maintain quality- Excellent functional properties of BOBLET provides sufficient impact
resistance and pressure resistance strength for practical use.
Now is used for a microwave cooking pouch of seasoned raw meat.
Reason: Improve heat resistance of the package in a longtime microwave heating.

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Proposal②： Lid Material for thermoforming packagewith barrier type
Applications ▶

▶

Steamed chicken breast or sausage

Current Structure

homoCPP40//Barrier ONY15//LL40

Structure being usedwith BOBLETOPBT15//Barrier ONY15//LL40

Plastic Reduction（weight）

17％

Improve troubles of CPP(Printability, Ink adhesive suitability, heat resistance)※same appearance as a current structure.

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12Appendix：Appearance
Current Structure

CPP30//barrierONY15//LL40

Structure with BOBLETOPBT15//barrier ONY15//LL40※ Appearance could be improved with appropriate conditions of thermoforming
packaging machine.

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Proposal②：LidMaterial for thermoforming packagewith non Barrier type*under evaluation
Current
Structure

CPP40//ONY15//LL40

CPP50//OPET12//LL40

CPP50//ONY15//LL40

Total
Thickness

101μ

108μ

111μ

Proposing
Structure withBOBLETOPBT20//LL40

OPBT20//LL40

OPBT20//LL40

Total
Thickness

63μ

63μ

63μ

PlasticReduction（weight）

31％

37％

37％

▶ Improve troubles of CPP(Printability, Ink adhesive suitability, heat resistance)
NOTE: Appearance could be improved with appropriate conditions of thermoforming packaging machine.

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Proposal③： Lid Material for trayed frozen meals
Applications ▶

Pasta, Sauteed meat/fish etc**trayed frozen meals by heating with microwave oven.

ProductPasta

Grilled marinated beef

Seasoned pork

Current Structure

ONY(25)//
ONY(15)//EP(30)

Total
80μ

OPET(12)//
ONY(15)//EP(30)

Total
65μ

OPET(12)//
ONY(15)//EP(30)

Total
65μ

Proposing Structure

OPBT(25)//EP(30)

Total
60μ

OPBT(20)//EP(30)

Total
55μ

OPBT(20)//EP(30)

Total
55μ

VolumeReduction※1

Plastic
reduction
rate

18%

13%

13%

CO2
reduction rate

26%

8%8%

▶ Volume Reduction ※1▶ Improve design (surface tension, non sticking ice)
▶ Maintain quality (cold resistance, wear pinholes, printability)※1 The above data are the results of our calculations under specific conditions and do not guarantee each reduction rate.

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