Presentation is loading. Please wait.

Presentation is loading. Please wait.

Edgard Chow (Technical Manager) Robert Armstrong (TS&D Director) Kuraray America Inc. Pasadena, TX SPE Polyolefins Conference Houston TX February 2012.

Similar presentations


Presentation on theme: "Edgard Chow (Technical Manager) Robert Armstrong (TS&D Director) Kuraray America Inc. Pasadena, TX SPE Polyolefins Conference Houston TX February 2012."— Presentation transcript:

1 Edgard Chow (Technical Manager) Robert Armstrong (TS&D Director) Kuraray America Inc. Pasadena, TX SPE Polyolefins Conference Houston TX February 2012 Improving the performance of bulk packaging of liquids through the use of modified ethylene vinyl alcohol (EVOH)

2 Agenda EVAL™ EVOH –Typical applications –Properties Liquid packaging formats –Bag-in-box –Intermediate bulk containers –Flexitants Improving the properties of EVOH –Conventional EVOH –Amorphous EVOH –Elastomer modified EVOH

3 a semi-crystalline thermoplastic and a random copolymer of E thylene and V inyl AL cohol (CH 2 -CH 2 ) m (CH 2 -CH) n OH 32 35 27 38 44 48 More flexible More orientable Ethylene mol % Higher density Higher melt point Higher barrier 24 What is EVOH?

4 EVOH Protects Food Oxygen, off-odors, off-flavors, other contaminants Flavor, aroma, vitamins, modified atmosphere gases (Outside of packaging) (Inside of packaging)

5  Oxygen barrier  Aroma barrier  Vitamin protection  Flavor preservation  Solvent barrier  Hydrocarbon barrier Versatility of EVOH Coffee Oxygen Toluene Vitamin CMintXylene

6 Agenda EVAL™ EVOH –Typical applications –Properties Liquid packaging formats –Bag-in-box –Intermediate bulk containers –Flexitants Improving the properties of EVOH –Conventional EVOH –Amorphous EVOH –Elastomer modified EVOH

7 The Iconic BIB Application Advantage over glass –More functional Single cup dispensing convenience No headspace Can stay open up to 21 days –More sustainable* 85% less packaging/landfill waste 53% less CO2 emissions Source: www.betterwinesbetterworld.com/

8 High barrier –0.5 ~ 0.8 cc/m 2.day.atm @ 20°C, 65%RH –EVAL™ L171B = 27mol% Et. EVOH High abuse resistance Pinhole formation OTR deterioration Wine BIB Requirements Up/down motion in land Side/side motion in sea 0 pinholes max. after 200 gelbo flex cycles 2 pinholes max. after 400 gelbo flex cycles OTR < 1.0 cc/m2.day.atm Potential Outcome Transportation Abuse Adopted Wine Industry Specifications ASTM F193-92 ASTM D3985 Standard Test Method

9 Evaluation Method ASTM F193-92 Reapproved 2004 45 CPM, full flex condition ASTM D3985 20°C, 65%RH Gelbo flex testing Oxygen transmission rate

10 Evaluation of Market Samples Inner layer : PE 40 Outer layer : (in) PE 30 //VM-PET 12 //EVA 40 (out)  OTR : 1.0 cc/m 2 /day/atm, 2.8 cc/m 2 /day/atm  WVTR : 5.7 g/m 2 /day Inner layer : PE 90 Outer layer : (in) PE 40 /Tie/EVOH 6 /Tie/PE 60 (out)  OTR : 0.8 cc/m 2 /day/atm  WVTR : 2.6 g/m 2 /day Inner layer : PE 40 Outer layer : (in) EVA 15 /Tie/EVOH 6 /Tie/EVA 7 //ON 10 //PE 30 (out)  OTR : 0.6 cc/m 2 /day/atm  WVTR : 5.9 g/m 2 /day Test conditions: OTR:20ºC/65%RH, WVTR:40ºC/90%RH PE inner liner Barrier outer liner

11 Evaluation of Market Samples Oxygen Transmission Rate After Gelbo Flex

12 BIB Applications (3 – 20L) Juice concentrate Coffee concentrate Cola Syrup Olive Oil Drums (200L) IBC(1000 – 1500 L) Sealed Air Cryovac Entapack ® Aran Packaging Bluesept55 ®

13 Flexitank Market Typically in the 12,000 to 36,000L range Must comply with the Code of Standards by the Container Owners Association The flexitank market size is ~500,000 units Recent 7-layer installation by Raven Industries

14 Flexitank Benefit 20 ft Container payload –15% higher than IBCs –44% higher than drums Source: www.unedecom.comwww.unedecom.com

15 Flexitank Market EPT Wine-Pac™ has a third inner liner of EVOH film OTR of 0.4 cc/m 2.day Applications –Food & beverage: wine, oils, juice concentrates, etc. –Cosmetics: detergents, bleaching solutions, cleaners, etc. –Industrial chemicals: adhesives, paints, biofuels, fuel additives, etc. Source: http://eptpac.comhttp://eptpac.com

16 Trends with big bags The larger the bag, … –the lower the barrier requirements Surface area to volume ratio factor –but the higher the physical abuse on the bag Normal stresses induced by higher loads Use of multiple liners similar to BIB is also practiced 3 – 5L retail BIB 3 – 20L institutional BIB 200 – 1500L IBC 12000 – 36000L Flexitank

17 High Barrier Flexitank Challenges Limited experience base producing large, thick bags with thin EVOH layers –Larger dies, longer residence time in the melt demand improved thermal stability Use of higher ethylene grades Selection of EVAL 7-series –Longer time for the bubble to reach its finished geometry Higher ethylene grades have a lower recrystallization temperature –Higher flex crack resistance Use of softer modified grades

18 Agenda EVAL™ EVOH –Typical applications –Properties Liquid packaging formats –Bag-in-box –Intermediate bulk containers –Flexitants Improving the properties of EVOH –Conventional EVOH –Amorphous EVOH –Elastomer modified EVOH

19 Failure Mechanism of Pinhole Formation Fatigue Cracking From radical generation on to micro-crack generation Inhibition of crack growth is critical to improve flexible crack resistance

20 EVAL Technologies for Liquid Packaging TypeTechnologyIllustrationFlex crack resistance EVALConventionalGood EVAL SPAmorphous EVOHBetter EVAL FSElastomer modified EVOH Domain-matrix Best

21 Film Pilot Equipment Materials –Sclair FP120 C8-LLDPE –Ultrathene UE624000 18% vinyl acetate EVA –Admer NF498A LLDPE-based tie resin –Dupont Byner 3861 EVA-based tie resin –Various types of EVAL Blown film production Brampton Engineering 7-layer, 6” pancake die Cast film production Toyo-seiki 20mm metering screw 300mm coat hanger die Gelbo flex conditions –45 CPM, full flex, room temperature

22 Coex blown film structure: LLDPE/Tie/EVAL/Tie/LLDPE = 36 / 5 / X / 5 / 36μm Effect of EVOH Grade and Thickness Number of gelbo cycles to create one (1) pinhole

23 Effect of Structure Stiffness Film structure –20μm monolayer cast film –90μm blown film: LLDPE/LL-Tie/EVAL/LL-Tie/LLDPE = 36/5/8/5/36μm –90μm blown film: LL+EVA/EVA-Tie/EVAL/EVA-Tie/LL+EVA = 36/5/8/5/36μm Number of gelbo cycles to create one (1) pinhole

24 Flex Crack Resistance of EVAL FS101 Structure: 90μm blown film: LLDPE/LL-Tie/EVAL/LL-Tie/LLDPE = 36/5/8/5/36 Number of gelbo cycles to create one (1) pinhole

25 More developments underway Structure: 20μm monolayer cast film Number of gelbo cycles to create one (1) pinhole

26 EVAL Grades for Liquid Packaging TypeTechnologyFlex crack resistance Grades (et.mol%) EVALConventionalGoodL171(27) F171(32) H171(38) E171(44) EVAL SPAmorphous EVOHBetterSP521(27) J171(32) XEP-1035(38) EVAL FSElastomer modified EVOH BestFS101(32) XEP-1273(32)

27 Summary EVOH has excellent barrier properties EVOH has great flex crack resistance when coextruded with softer polyolefin resins The use of EVOH in BIB is established but grades with improved the flex crack resistance for larger bags such as flexitanks have been developed We can sample any of the mentioned grades upon your request

28 Thank You! Presented by: Edgard Chow phone (281) 474-1558 edgard.chow@kuraray.com Acknowledgement Mr. Wataru Hirose (EVAL R&D Japan)


Download ppt "Edgard Chow (Technical Manager) Robert Armstrong (TS&D Director) Kuraray America Inc. Pasadena, TX SPE Polyolefins Conference Houston TX February 2012."

Similar presentations


Ads by Google