Transparent High-Barrier Retortable Film

ANTWERP

TOKYO

HOUSTON SHANGHAI

Contact

TOKYO HEAD OFFICE OTE-CENTER BUILDING, 1-1-3 OTEMACHI, CHIYODAKU, TOKYO:100-8115 FILM SALES DEPARTMENT, TEL: +81-3-6701-1491 FAX: +81-3-6701-1476

CHINA KURARAY SHANGHAI Co.,Ltd 18F JIUSHE FUXING BUILDING, 918 HUAIHAIROAD(M), SHANGHAI: 200020 EVAL GROUP TEL: +86-21-6415-1146 FAX: +86-21-6415-1148 http://www.kurarister.jp e-mail : [email protected]

EUROPE KURARAY (EVAL EUROPE nv), HAVEN 1053, NIEUWE WEG 1 - BUS 10 B-2070 ZWIJNDRECHT (ANTWERP), BELGIUM TEL.: +32 3 250 97 22 FAX: +32 3 250 97 45 E-mail: [email protected] www.kurarister.com TRANSPARENT HIGH-BARRIER www.kurarister.com e-mail: [email protected] RETORTABLE FILM

AMERICAS KURARAY AMERICA INC. 2625 BAY AREA BLVD, SUITE 300 HOUSTON, TX 77058, USA TEL.: (800) 423 9762 FAX: (281) 204 4622 www.kurarister.com E-mail: [email protected]

2009 / 08 / 1000

111544 EVAL - KURARISTER.indd 1 29/04/11 14:57 A clear choice for retort packaging 1. What is KURARISTER™? KURARISTER™ is a transparent high gas barrier retortable film, with Kuraray´s proprietary Kuraray Co. Ltd. became known as a leader in gas barrier technology with EVAL™ EVOH. EVAL™ resins organic/inorganic hybrid composite coated on both sides of a base substrate. and films used in food packaging preserve product flavour and aroma, and prolong product freshness The coating layers are extremely durable and provide reliable high gas barrier properties. KURARISTER™ C is based on PET film and KURARISTER™ N is based on bi-axially oriented PA film, and shelf life. KURARISTER™ is a new transparent film for lamination, developed to extend these which can be used for a wide range of packaging applications. properties into flexible barrier retort packaging. KURARISTER™ is not an EVAL™ product, but rather uses Kuraray's proprietary organic/inorganic hybrid technology. Structure of KURARISTER™ film Cross section of KURARISTER™ Magnified picture of barrier coating

O2 Base film O2 Polymeric O2 O2 O2 O2 O2 matrix Contents Hybrid Base film Grade 1. What is KURARISTER™? P.3 Inorganic PET KURARISTER™ C compound 2. Characteristics P.3 OPA KURARISTER™ N Polymeric matrix Inorganic compound

Food safety:KURARISTER™ has passed the specification/standard test of Official Notice No. 370(1959) from Japan's Ministry of Health and Welfare. KURARISTER™ may be used for indirect 3. Gas Barrier Performance P.4 food contact as outlined by the US FDA's CFR176.170, CFR177.1390, CFR177.1395 and is approved for use as a food package material. KURARISTER™ is approved for use as a plastic material under the EU Directive No.1935/2004/EC. For additional information, please contact us. 4. Performance Testing P.5 Characteristics 5. Physical Properties P.6 2. 6. Applications & Package Structures P.7 Reliable high gas barrier performance

■The highest gas barrier level among existing plastic films ■Retortable, suitable for use with common retort methods ■High resistance to elongation, flexing and folding ■High adhesive strength ■Suitable to any filling method 2-ply structure for retort pouch

■OPA-based KURARISTER™ N combines mechanical strength and high-barrier properties. ■Excellent toughness and flexibility provided by the OPA base film. ■Cost reduction by using a 2-ply structure of KURARISTER™ N / Sealing layer.

■Weight reduction of package Alternative to aluminum foil

■Transparent → Quality checking ■Printable without surface treatment → High impact image and shelf appeal ■Compatible with metal detectors → Food safety ■Microwavable → Convenience ■Recoverable without toxic emissions → Reduced environmental impact

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111544 EVAL - KURARISTER.indd 2 29/04/11 14:57 A clear choice for retort packaging 1. What is KURARISTER™? KURARISTER™ is a transparent high gas barrier retortable film, with Kuraray´s proprietary Kuraray Co. Ltd. became known as a leader in gas barrier technology with EVAL™ EVOH. EVAL™ resins organic/inorganic hybrid composite coated on both sides of a base substrate. and films used in food packaging preserve product flavour and aroma, and prolong product freshness The coating layers are extremely durable and provide reliable high gas barrier properties. KURARISTER™ C is based on PET film and KURARISTER™ N is based on bi-axially oriented PA film, and shelf life. KURARISTER™ is a new transparent film for lamination, developed to extend these which can be used for a wide range of packaging applications. properties into flexible barrier retort packaging. KURARISTER™ is not an EVAL™ product, but rather uses Kuraray's proprietary organic/inorganic hybrid technology. Structure of KURARISTER™ film Cross section of KURARISTER™ Magnified picture of barrier coating

■Weight reduction of package Alternative to aluminum foil

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111544 EVAL - KURARISTER.indd 3 29/04/11 14:57 3. Gas Barrier Performance 4. Performance Testing Oxygen transmission rate KURARISTER™ protects food contents from oxidation with its reliable high gas barrier performance. The following are the results of storage tests before and after retort, using a methylene blue indicator KURARISTER™ shows high gas barrier performance in a wide range of retort methods and conditions. method*. 3-1. Oxygen Transmission Rates Unit : cc/m2.day.atm Retort 4-1.Vacuum pouch KURARISTER™ C KURARISTER™ N Method Condition Pouch Silica ball before retort 0.3 0.5 KURARISTER™ Inorganic coated PET PVDC ﬁlm water immersion 120℃ 30 min 0.4 0.7 water immersion 120℃ 60 min 0.4 0.7 water immersion 120℃ 120 min 0.4 0.7 spray 120℃ 30 min 0.4 0.7 Before steam 120℃ 30 min 0.5 0.7 retort

* OTR Measurement condition : 20℃ 85%RH / 100%RH *2 KURARISTER™ C (3 layers) : KURARISTER™ C #12 / BON15μm / CPP50μm KURARISTER™ N (2 layers) : KURARISTER™ N #15 / OPA50μm Gel (Colour changes to blue with oxygen ingress) The test result shows that Reliable oxygen transmission rate after physical stress KURARISTER™ film maintains 1day after KURARISTER™ has high resistance to physical stress such as flex, elongation, friction and folding due its gas barrier properties after retort to its durable coating layers. Such stress has little impact on KURARISTER™ gas barrier properties. the stress of pouch vacuuming 3-2. OTR after retort and flexing and retort treatment. 6 KURARISTER™ C 4-2.Lidding film 4 KURARISTER™ N .day.atm

2 Inorganic coated PET 2 Lid ﬁlm Aluminum cup KURARISTER™ Inorganic coated PET PVDC ﬁlm

cc/m 0 Gelbo 0 cycle Gelbo 10 cycles Gelbo 50 cycles

* OTR measurement condition : 20℃ 85% / 100%RH * Retort condition : 120℃ -30min., water immersion Before *2 KURARISTER™ C (3 layers) : KURARISTER™ C #12 / OPA15μm / CPP50μm retort KURARISTER™ N (2 layers) : KURARISTER™ N #15 / CPP50μm Inorganic coated PET (3 layers) : Inorganic coated PET 12μm / OPA15μm / CPP50μm Gel (Colour changes to blue with oxygen ingress) 3-3. OTR after elongation and scratch testing 1 The test result shows that the 20days KURARISTER™ C stress of heat sealing and retort 0.8 KURARISTER™ N after retort 0.6 Inorganic coated PET treatment has little impact on .day.atm 2 0.4 KURARISTER™´s gas barrier

cc/m properties. 0.2

0 0% elongation 5% elongation Test conditions Test sample film structures * Retort condition : 120℃ - 30 minutes, water immersion PET 12μm * Film before retort * Storage condition : 23 50%RH ℃ Inorganic coated PET 12μm PVDCﬁlm 15μm * OTR measurement condition: 20℃ 85%RH KURARISTER™ N #15 OPA 15μm OPA 15μm

CPP 70μm CPP 70μm CPP 70μm KURARISTER™ Inorganic coated PET PVDC ﬁlm

*Methylene blue method: Methylene blue gel changes colour with oxidation, allowing to effectively visualise oxygen permeation into a package.

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111544 EVAL - KURARISTER.indd 4 29/04/11 14:57 3. Gas Barrier Performance 4. Performance Testing Oxygen transmission rate KURARISTER™ protects food contents from oxidation with its reliable high gas barrier performance. The following are the results of storage tests before and after retort, using a methylene blue indicator KURARISTER™ shows high gas barrier performance in a wide range of retort methods and conditions. method*. 3-1. Oxygen Transmission Rates Unit : cc/m2.day.atm Retort 4-1.Vacuum pouch KURARISTER™ C KURARISTER™ N Method Condition Pouch Silica ball before retort 0.3 0.5 KURARISTER™ Inorganic coated PET PVDC ﬁlm water immersion 120℃ 30 min 0.4 0.7 water immersion 120℃ 60 min 0.4 0.7 water immersion 120℃ 120 min 0.4 0.7 spray 120℃ 30 min 0.4 0.7 Before steam 120℃ 30 min 0.5 0.7 retort

2 Inorganic coated PET 2 Lid ﬁlm Aluminum cup KURARISTER™ Inorganic coated PET PVDC ﬁlm cc/m 0 Gelbo 0 cycle Gelbo 10 cycles Gelbo 50 cycles

cc/m properties. 0.2

CPP 70μm CPP 70μm CPP 70μm KURARISTER™ Inorganic coated PET PVDC ﬁlm

*Methylene blue method: Methylene blue gel changes colour with oxidation, allowing to effectively visualise oxygen permeation into a package.

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111544 EVAL - KURARISTER.indd 5 29/04/11 14:57 5. Physical Properties 6. Applications and Package Structures

KURARISTER™ provides physical properties equivalent to those of the PET or OPA base film. 6-1. Application examples Package type Content 5-1. Physical Properties Item Unit Measurement method KURARISTER™ C KURARISTER™ N Vacuum pouch Cob corn, potato, beet, pet food, etc. MD 220 230 Tensile Strength MPa at Break TD 170 260 MD 120 130 Elongation at Break % ISO1184 TD 170 110 Lidding film Diced fruits, desserts, vegetables, etc. MD 5.4 3.1 Tensile Modulus GPa TD 5.1 2.5 MD 26 32 Slippage degree TD 28 32 Kuraray Method VFFS Institutional foods (sauce, soup, pickles, puree, etc.) MD 0.50 0.63 COF µ TD 0.54 0.64 Wetting Index dyne/cm JIS K6768 ＞54 ＞54 Total Light Transmission % 92 93 Retail food pouch Retort food in general JIS Z7105 Haze % 2.2 1.7 (SUP & flat pouch) (sauce, soup, cooked rice, tuna, MRE, meat & poultry, etc.) * Measurement condition : 23℃50%RH

6-2. Typical retort film structure and examples of structure simplification with KURARISTER™ print KURARISTER™ N impact strength before and after retort adhesive The base OPA substrate is protected from oxidation during the retort process by the high gas barrier of PET the coating layers. As a result, KURARISTER™ N maintains its mechanical properties after retort even KURARISTER™ C better than a normal untreated OPA film. This combination of reliable mechanical and high-barrier Al foil/PVDCfilm ・Lighter weight packaging ・All-plastic structure properties makes it suitable for use in cost-saving 2-ply pouch structures. OPA OPA

5-2. Impact strength sealant sealant 2 KURARISTER™ N 4 layers 3 layers 1.5 OPA

1 * Measurement condition : 23℃, 50%RH kg.cm * Retort method : Steam Barrier PET ・Lighter weight packaging 0.5 * Film structure : KURARISTER™ N15 / CPP50µm ・Less lamination OPA 15µm / CPP50µm OPA ・Cost reduction KURARISTER™ N 0 before retort 120 30 min. retort ℃ sealant sealant Retort 3 layers 2 layers

Note - The information and data contained in this document are believed to be correct and are given in good faith. However, no liability, warranty or guarantee of final product performance is created by this document. No freedom from any patent is granted or to be inferred. This document does not constitute a sales specification and the Kuraray Co., Ltd. Sales Contract General Terms and Conditions continue to apply.

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111544 EVAL - KURARISTER.indd 6 29/04/11 14:57 5. Physical Properties 6. Applications and Package Structures

5-2. Impact strength sealant sealant 2 KURARISTER™ N 4 layers 3 layers 1.5 OPA

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111544 EVAL - KURARISTER.indd 7 29/04/11 14:57 ANTWERP

TOKYO

HOUSTON SHANGHAI

Contact

TOKYO HEAD OFFICE OTE-CENTER BUILDING, 1-1-3 OTEMACHI, CHIYODAKU, TOKYO:100-8115 FILM SALES DEPARTMENT, TEL: +81-3-6701-1491 FAX: +81-3-6701-1476

CHINA KURARAY SHANGHAI Co.,Ltd 18F JIUSHE FUXING BUILDING, 918 HUAIHAIROAD(M), SHANGHAI: 200020 EVAL GROUP TEL: +86-21-6415-1146 FAX: +86-21-6415-1148

http://www.kurarister.jp e-mail: [email protected]

www.kurarister.com e-mail: [email protected] RETORTABLE FILM

AMERICAS KURARAY AMERICA INC. 2625 BAY AREA BLVD, SUITE 300 HOUSTON, TX 77058, USA TEL.: (800) 423 9762 FAX: (281) 204 4622

www.kurarister.com e-mail: [email protected]

2009 / 08 / 1000

111544 EVAL - KURARISTER.indd 8 29/04/11 14:58