application of l-modu for bopp film · evaluation a: the stretched film was checked visually, and...

1 2005-04

Application of L-MODUTM

for BOPP film

Idemitsu Kosan Co.,Ltd.

May 20th , 2020

Data in this material shows sample figures measured under certain specific conditions.2005-04

L-MODUTM which is only made from propylene monomer has been developed by

Idemitsu Kosan Co.,Ltd. with its original metallocene catalyst technology.

That features are ‘Low Modulus’, ‘Low Melting Point’ and ‘Low Melt Viscosity’

compared with Isotactic PP because of that own low crystallinity.

Introduction of L-MODU TM

2


Atactic PP Low Isotactic PP High Isotactic PP

L-MODUTM

Melting point HighNone

Touch of sense Hard

Low

SoftSticky

Crystallization rate FastSlowNo crystallization

L-MODUTM is new type polypropylene with characteristics of low

crystallinity, low melting point and softness. It is controlled molecular

stereo-regularity by producing with Idemitsu`s metallocene catalyst.

Key Concept

3


High crystalline

&

High rigidity

Amorphous

Isotactic

Atactic

[mmmm] ≒100

[mmmm] ≒6

IPP

APP

・[mmmm] ≒30~60 ・Mw / Mn ≒ 2

・Low crystalline ・Soft ・Elastic

m n

Low isotactic

Idemitsu

Metallocene catalyst

Conventional catalyst

heterogeneous distribution

homogeneous distribution

Control Technology of Stereo-regularity

4


L-MODUTM-20%

P/E Copolymer -20%

L-MODUTM has good compatibility with PP in comparison

with copolymer type soft materials.⇒improved excellent optical property and modification of mechanical properties

Blending and mixing various propylene

based soft materials to homo PPSea-island structure

Sea-island structure

Homogeneous structure

P/E Copolymer -20%

Compatibility of L-MODUTM with PP

5


Homo PP + L-MODUTM 10%

Homo PP

Flash DSC (Mettler Toledo)

condition: isothermal crystallization after cooling from 230ºC to25ºCat 2000ºC/min.

Crystallization rate is delayed by adding L-MODUTM to PP.⇒ improved good thermoforming property (stretching, spinning, vacuum molding etc.)

Random copolymer PP

Random copolymer PP + L-MODUTM 10%

0.0 0.1 0.2 0.3 0.4 0.5

←en

do

therm

ic

e

xo

therm

ic→

Time in isothermal crystallization (sec)

Controlling of crystallization rate of PP

6


The number of sphrulite increases by reducing the spherulite size

regarding to the delay of crystallization rate by adding L-MODUTM to PP.

⇨ Stretchability can be improved by Adding L-MODUTM

PP only PP + L-MODUTM

・PP：MFR = 3.0g/10min

・L-MODUTM : Grade S901、MFR = 50g/10min、Tm = 80ºC

・1mm sheet／Cooling temp. of the roll：30ºC

【Cross section view photo of sheet measured by phase contrast microscope】

Control of spherulite crystallization

7


L-MODUTM localize only in amorphous regions.

Lamellar

structure

Amorphous

region

L-MODUTM

40 80 120 160 200

← 発熱

吸熱

→

Temperature (ºC)

En

d th

erm

icE

xo

th

erm

ic

Adding L-MODUTM to PP has little effect on melting point

because L-MODUTM localize only in amorphous regions.

Melting point

Effects on melting point and higher orderstructure by adding L-MODU to PP

8


* MFR of S400 is converted from viscosity data.

Typical Properties

MethodL-MODUTM

S400 S600 S901

MFR (g/10min) (230 oC, 2.16 kg) ISO 1133 2,600* 390 50

Molecular Weight (Mw)GPC (Idemitsu method)

45,000 75,000 130,000

B-Viscosity (mPa・s) (190 oC) ISO 2555 8,500 50,000 360,000

Density (kg/m3) ISO1183 870 870 870

Melting Point (oC)DSC(Idemitsu method)

80 80 80

Softening Point (oC)

(Ring-and-ball)ISO4625 93 100 120

Tensile Modulus (MPa) ASTM D 638 100 100 100

ISO527 90 90 90

Elongation at Break (%) Idemitsu method 600 800 900

9


Example of Application

10

L-MODUTM can be applied to

Hot Melt Adhesive

Spunbond Nonwoven

BOPP Film

TPE / TPV

Masterbatch for pigment / filler


L-MODUTM improves various properties

Effects for BOPP film

1. Improvement of

stretchability

2. Increasing productivity

3. Excellent property

4. Possible to use high

crystallinity PP

L-MODUTM

・homo polypropylene

・low tacticity

・stereo-random structure

・narrow molecular weight distribution

・narrow molecular composition distribution

Effects of adding L-MODUTM to PP

11


Item Advantage of adding L-MODU

Moldability

1. Improvement

stretchability

Better thickness uniformity

Expanding the process window

2. Increasing

productivity

Stable BOPP film production with low MD stretching

rolls temp.

Reducing frequency of film breaking

Faster line speed (especially for thick film)

Film

functionality

3. Excellent film

property

Low-temperature heat sealability

Improvement transparency

Preventing separation of AB agents (skin layer)

Expansion

of resin

selectivity

4. Possible to

use high

crystallinity PP

Good stretchability

High modulus & high transparency

Capability to make a thin film（Down Gauge）

Possible to use

Low MFR PPImprovement of Flowability of low MFR PP

P13

P14

P15-17

P20-22

P25

P18

P19

Application of L-MODUTM for BOPP film

12


Better thickness uniformity Productivity improvement

◆PP for BOPP

◆PP for BOPP + L-MODUTM 5%

Improvement of thickness uniformity

Brake melt

Temperature/TDO

Sta

nd

ard

de

via

tio

n

of

thic

kn

ess

good

bad

Low HighMachine ： Japanese university laboratory stretching machine Stretching mode : sequential (MD to TD）Stretching ratio : 5.0(MDO) ×7.0 (TDO)

Sheet thickness : 550 μmStretching speed：10 mm/min

1. Improvement stretchability- Better thickness uniformity -

13


TDO Temperature / ℃158 159 160 161 162 163 164 165 166

PP B A A A A A A B

97% PP + 3% L-MODUTM B A A A A A A A B

Expanding the process window by adding L-MODUTM

TDO stretching temperature is reduced.

<Stretchability evaluation - TDO stretching process window>

Machine ： Our laboratory stretching machine Material : MDO sheet(×5)MDO ratio / Temp. : 5.0(MDO) / 147oC

MDO Sheet thickness : 0.2 mmTDO ratio : 9TDO Strain rate：6600 %/min

Material

PP : standard BOPP (MFR = 3.0g/10min, mmmm= 90 mol%)

L-MODUTM : S901 (MFR= 50g/10min)

Evaluation

A : The stretched film was checked visually, and there was no problem.

B : The stretched film was checked visually, and there was uneven thickness of the film (Not breaking )

1. Improvement stretchability- Expanding the process window -

14


T-die

Casting

Annealing & RelaxationTD stretching(Tenter)

MD stretching

(Roll to roll) Random PP

LLDPE, LDPE

← Homo PP

←

Roll temp. must be set low

to prevent film sticking to

rolls.

Reduction of productivity

・film breaking

・lower line speed

・larger variation in film

thickness

←Random PP

LLDPE, LDPE


15


Adding L-MODUTM enable stretch at low TDO temperature.

Evaluation

A : The stretched film was checked visually, and there was no problem.

B : The stretched film was checked visually, and there was uneven thickness of the film (Not breaking )

<Stretchability evaluation - TDO stretching process window>

158 159 160 161 162 163 164

PP B A A A A A

97% PP + 3% L-MODUTM B A A A A A A

PP B A A A A

97% PP + 3% L-MODUTM B A A A A A A

PP B A A A

97% PP + 3% L-MODUTM B A A A A A

TDO Temperature　/　℃

147

127

107

MDO　

Temp.

Material

PP : standard BOPP (MFR = 3.0g/10min, mmmm= 91 mol%)

L-MODUTM : S901 (MFR= 50g/10min)

Machine ： Our laboratory stretching machine Material : MDO sheet(×5)MDO ratio : 5.0(MDO)

MDO Sheet thickness : 0.2 mmTDO ratio : 9TDO Strain rate：6600 %/min


16


Adding L-MODUTM S901 in a core layer enable stable

BOPP film production with low MD stretching rolls temp.

MD TD

Stretching

Temp.(℃)Pre-heating

Temp.(℃)

Stretching

Temp.(℃)

Skin :Homo PP

Core：Homo PP

Skin ：Homo PP

140~150 135~145 GOOD

Skin :Random PP, PE

Core：Homo PP

Skin ：Random PP, PE

80~120 75~115 BAD

Skin :Random PP, PE

Core：Homo PP + L-MODUTM

Skin ：Random PP, PE↑ ↑ GOOD

Concept

Application examples

> Paper lamination film (matt type)

> Lower temperature heat sealable film

> Hologram film


17


3. Excellent property - Heat sealable film -

18


L-MODUTM S901 % 0 5

MDOTemp. ℃ 106 106

Stretching ratio ｰ 5 5

TDOStretching temp. ℃ 165 165

Stretching ratio ｰ 8.5 8.5

Haze % 1.3 1.1

Gloss (60º) % 129 144

Coefficient of

static friction

inside/

outside― 0.45 0.47

Blocking strength g/100cm2 1.84 0.53

PicC：breaking of membrane

% 4.6 2.8

Pic.D：falling off of AB agent

% 0.5 0.2

Magnified photo of AB agent 【SEM ×2000】

• Prevention of roll pollution

• Decreasing of printing failure

• Improvement of transparency

Machine ：Bruckner pilot machine Film ：thickness 15 μm／ width 900 mmMaterials : Core : homo PP(+L-MODUTM)

Skin : homo PP＋AB agent MB(2.0%) (+L-MODUTM)Line speed ：50m/min.*The ratio of the number of “C” or”D” in “A~D” in the area

C：breaking of membrane D：falling off of AB agent

A B

Adding L-MODUTM into Skin layer enable preventing separation of AB agents

and has following expected effects

3. Excellent property - Preventing separation of AB agents -

19


Stretchability

Process window

Gross

TransparencyMoisture and

Oxygen barrier

Modulus

Capability to down-gauge

The use of highly crystallinity PP with L-MODUTM has the

following advantages.

Standard BOPP GradeHigh crystallinity PPHigh crystallinity PP + L-MODUTM

4. Possible to use high crystallinity PP

20


Good Stretchability

<S-S curve at TD stretching>

Machine ：Bruckner laboratory stretching machine KARO IV

Material : MDO sheet(×5)

TDO ratio : 8.0、9.5

Stretching speed：200 %/s


Enable to produce BOPP films easily even by using

high crystallinity PP

Improvement of stretchability

4. Possible to use high crystallinity PP - Good stretchability -

21


<Mechanical and optical property>

excellent optical properties

improvement for balance of film properties (mechanical,

optical, etc.) especially for high crystallinity PP

Stretching Machine ：Bruckner laboratory stretching machine KARO IVStretching ratio : 5(MDO) ×9.5 (TDO)

Film thickness : 20 μm※ Appropriate stretching temperature is necessary for good film properties.


4. Possible to use high crystallinity PP - High modulus & high transparency -

22


Adding L-MODUTM into a core layer enable

Expanding the process window

better thickness uniformity

stable BOPP film production with low MD stretching rolls temp.

reducing frequency of film breaking

faster line speed

excellent low-temperature heat sealability

Improvement transparency

Adding L-MODUTM to homoPP having high crystallinity enable

Down-gauge to produce thinner films

Stretchability equal to or higher than BOPP grade

Mechanical and optical properties higher than BOPP grade

Proposal :

23


Appendix

24


1.0

2.0

3.0

4.0

0 1 2 3 4 5

MF

R(2

30

℃, 2

.16㎏）

[g/1

0m

in]

L-MODUTM S400 amount [%]

MFR(3.0) PP + S400

MFR(2.5) PP + S400

MFR(2.0) PP + S400*

L-MODUTM can control the flow ability of molten resin.

*Calculated value

1.0

2.0

3.0

4.0

0 1 2 3 4 5

MF

R(2

30

℃, 2

.16㎏）

[g/1

0m

in]

L-MODUTM S901 amount [%]

MFR(3.0) PP + S901

MFR(2.5) PP + S901

MFR(2.0) PP + S901

*

Improvement of flow ability

25


1. Data and description in this material are information for design of products made from L-MODU™. The content of

this material is based upon reliable test and information, but it is not absolute and perfect. Whenever the content of

this material is used for design of your products, please test and confirm independently appropriation of such

design. The content of this material does not warrant the successful result of its application to your own purpose

and usage.

2. The content of this material is based upon reliable tests and information, but it does not warrant the successful

results of its application to your own purpose and usage.

3. Data in this material shows sample figures measured under certain specific conditions.

4. In case of product being used for purpose and usage introduced in this material, please pay attention to industrial

property rights of third party which may relate to such use.

5. The Product is a general industrial product and Seller does not guarantee the quality of medical equipment, medical

products and cosmetics. In case of the product being used for food applications and toys, please consult with the

manufacture before such use.

6. Please note that the content of this material may be altered from time to time according to improvement of products

without prior notice.

7. Figures of physical characteristics of other resins than the products have been referred from other catalogues and

sources thereof.

application of l-modu for bopp film · evaluation a: the stretched film was checked visually, and...

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