Introduction of L-MODU TM as a modifier for BOPP films Performance Materials Laboratories 1 / 16
What is L-MODU TM...? Rigid Soft melting point (ºC) 150 100 PP WAX PE WAX APAO IPP Low Crystallinity HDPE LLDPE L-MODU TM 50 0 10 2 10 4 10 6 10 8 Melt viscosity (mpa s@190ºc) low Molecular weight high L-MODU TM has been developed by Idemitsu Kosan Co.,Ltd. with our original metallocene catalyst technology. It has some unique feature. 2 / 16
Special feature of L-MODU TM L-MODU TM 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. L-MODU TM Atactic PP Low Isotactic PP High Isotactic PP Melting point None Low High Touch of sense Sticky Soft Hard Crystallization rate No crystallization Slow Fast 3 / 16
Primary structure of L-MODU TM Stereo regularity high Isotactic Atactic High crystalline High stiffness Conventional catalyst 低立体規則性領域 Partially Low Stereo regularity Low crystalline, Softness Amorphous [mmmm] 100 IDEMITSU metallocene catalyst [mmmm] 6 Stereo regularity distribution ;wide Stereo regularity distribution ;narrow Low crystalline Soft Elastomer and Plastomer 4 / 16
Typical Properties of L-MODU TM Melt Flow Rate (230, 2.16kg) Molecular Weight Density Test method ASTM D1238 GPC- Idemitsu method ISO 1183-gradient tube method unit L-MODU TM S400 S600 S901 g/10min 2,000 350 50 45,000 75,000 130,000 kg/m 3 870 870 870 Melting Point DSC- Idemitsu method 1 ºC 80 80 80 Tensile Modulus Idemitsu method 2 MPa 90 90 110 Tensile elongation at brake Idemitsu method % 600 800 900 1:-40ºC (5min.) 10ºC/min.(rate) 220ºC 2 JIS-K 7113-2, Half-size specimen 5 / 16
Proposals of L-MODU TM for PP modifier L-MODU TM Homo polypropylene Low tacticity Narrow molecular weight distribution Narrow molecular composition distribution Effects for PP Low crystallinity Softness Good compatibility with PP Slowing down crystallization rate Reducing spherulite size L-MODU TM can improves various properties! for CPP film Excellent transparency and gloss Good thermoformability Appropriate softness Good stability of additives bleeding-out for BOPP film Excellent stretchability Better thickness uniformity Especially for high crystallinity PP Improvement of stretching ratio Excellent transparency and gloss 6 / 16
Compatibility of L-MODU TM with PP Blending and mixing various propylenebased soft materials to homo PP Sea-island structure Homogeneous structure P/E Copolymer -20% Sea-island structure L-MODU TM -20% P/E Copolymer -20% L-MODU TM has good compatibility with PP in comparison with copolymer type soft materials. 7 / 16
Control of crystallization rate of PP endothermic exothermic 0.0 0.1 0.2 0.3 0.4 0.5 Time in isothermal crystallization (sec) Homo PP Homo PP + L-MODU TM 10% Random copolymer PP Random copolymer PP + L-MODU TM 10% Crystallization rate is delayed by adding L-MODU TM to PP. Good Transferability of mold and good formability (e.g. stretchability, spinnability) Flash DSC (Mettler Toledo) condition: isothermal crystallization after cooling from 230ºC to25ºcat 2000ºC/min. 8 / 16
Control of spherulite crystallization Cross section view photo of sheet measured by phase contrast microscope General PP High stiffness PP Spherulite size large Spherulite density medium Spherulite size large Spherulite density high High stiffnesspp + L-MODUTM S901 5% Sperulite size small Spherulite density low Normal PP MFR = 3.0g/10min Tm = 160ºC high stiffness PP MFR = 3.0g/10min Tm = 168ºC L-MODUTM S901 MFR = 50g/10min Tm = 80ºC 1mm sheet cooling roll temp. 30ºC Stretchability of high stiffness PP is lower than one of general PP because of high spherulite density By adding small amount of L-MODUTM to high stiffness PP, spherulite density and size become less or smaller. Stretchability can be improved by Adding L-MODUTM 9 / 16
Effects on melting point and higher order structure by adding L-MODU to PP End thermic L-MODU TM Lamellar structure Amorphous region Exo thermic L-MODU TM localize only in amorphous regions. Adding L-MODU TM to PP has little effect on melting point because L-MODU TM localize only in amorphous regions. 10 / 16
Advantage of L-MODU TM to BOPP films Adding L-MODU TM to BOPP films Excellent stretchability <Addition to high stiffness PP> Enable to produce BOPP films easily even by using high stiffness PP Better stiffness compared to PP for BOPP <Addition to PP for BOPP> Wide process window Better thickness uniformity Productivity improvement 11 / 16
Advantage of L-MODU TM to high stiffness PP TD Stretching force (kgf) 1.2 1 0.8 0.6 0.4 0.2 0 Decrease in yield stress High stiffness PP (152ºC 169ºC) PP for BOPP (147 165 ) High stiffness PP + L-MODU TM (152ºC 169ºC) 1 2 3 4 5 6 7 8 9 10 TD Stretching ratio (-) MD TD stretching temp. are in parenthesis High stiffness PP :Tm = 168ºC :MFR = 3.0 PP for BOPP :Tm = 160ºC :MFR = 3.0 Sheet thickness :1000μm Stretching method :sequential MD stretching ratio By roll stretching :5.0 TD stretching ratio By table stretcher :9.5 Good Stretcability Enable to produce BOPP films easily even by using high stiffness PP 12 / 16
Mechanism of stretchability improvement with L-MODU TM PP for BOPP High stiffness PP High stiffness PP + L-MODU TM Lamellar structure Amorphous region L-MODU TM Melting Point (depend on lamellar thickness) 160 170 170 Keeping lamella thickness Stretchability (depend on amount of amorphous region) Good No good Increase of amorphous region Good Stiffness (proportion of lamellar and amorphous) Good Excellent Very good Better Stiffness compared to PP for BOPP by using high stiffness PP + L-MODU TM 13 / 16
Advantage of L-MODU TM to PP for BOPP bad Standard deviation of thickness good Brake Low PP for BOPP PP for BOPP + L-MODU TM 5% Expansion of stretchable temperature range Temperature/TDO Improvement of thickness uniformity melt High Sheet thickness :550μm Stretching method :sequential Stretching ratio :MD 5 TD 7 Stretching method :table stretcher Stretching ratio :10mm/sec Film thickness :16μm Good stretchability (wide process window) Better thickness uniformity Productivity improvement 14 / 16
Recommended use of L-MODU TM for BOPP films 1. Preventing separation of AB agents 2. Productivity improvement for BOPP films for very low temp. sealing 3. Transparency improvement of thick BOPP films 4. Productivity improvement for heat shrinkable BOPP films 5. Productivity improvement for capacitor films 15 / 16
Attention for evaluation of L-MODU TM Data in this Catalogue shows sample figures measured under certain specific conditions. Usage of products in this Catalogue does not warrant the successful results of applications of the product for specific usage. In case of product being used for purpose and usage introduced in this Catalogue, please pay attention to industrial property rights of third party which may relate to such use. In case of product being used for medical device, cosmetics, food and beverage container and toys, please consult with the manufacturer before such use. Please note that the content of this Catalogue may be altered from time to time according to improvement of products without prior notice. Figures of physical characteristics of other resins than the products have been referred from other catalogues and sources thereof.. 16 / 16