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Issue 04/2017

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  • Bioplastics
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Materials Flexible

Materials Flexible laminates BioPBS offers sealing solution for home compostable flexible packaging BioPBS (bio-based polybutylene succinate (PBS)) is a biobased semi-crystalline polyester. It is flexible and certified biodegradable (EN 13432 / OK COMPOST), with home compostable grades (OK COMPOST HOME) also available. BioPBS is easy to process with a higher service temperature compared to other, similar biodegradable polymers such as PLA or PBAT. Derived from natural resources, the material provides a perfect solution for biodegradable flexible packaging applications. The solubility parameter (SP) value, for example, is close to that of cellulose, leading to a very good wettability. The melting temperature of other bioplastics such as PLA, which also has a similar SP value, is too high. This could cause the cellulose to burn. The material presented here is produced by PTT MCC Biochem, a joint venture between PTT Global Chemical Public Company Limited (Thailand) and Mitsubishi Chemical Corporation (Japan). PTT MCC Biochem obtained an exclusive license for the technology from Mitsubishi Chemical, who holds recognized patents on high quality polyesters produced from biomass. As a result, PTTMCC is the world’s first and largest BioPBS manufacturer, with a plant located at Rayong, Thailand boasting a total annual capacity of 20,000 tonnes. The flexible semi-crystalline polyester is made from biobased succinic acid, derived from natural resources, such as sugarcane, cassava and corn, and 1,4-butanediol. Higher service temperature & degradable at room temperature Among other excellent properties, the heat resistance of up to 100°C (HDT B), and the ability to completely biodegrade at ambient temperature make BioPBS a unique material. BioPBS Key features Mechanical – Physical – Environmental Process Main Applications Bio-sourced, biodegradable Industrially compostable Home compostable Biodegradable in Soil Heat-resistant to 100° (HDT B) Flexible – Impact resistant Heat sealable Adheres to paper and natural fibers Extrusion–Coating Injection moulding Short cycle times Standard LDPE machinery and tooling Coated paper for hot/cold drinks, food wrap Sealant layer for flexible packaging Cutlery, Lids, Tableware Fibers Coffee capsule Mulch film Typical Properties of BioPBSTM Property Unit FZ-grade FD-grade MFR g/10min 5 and 22 4 Flexural Modulus MPa 650 250 Izod Impact Strength kJ/m2 10 47 HDT B (0.45 MPa) °C 95 63 Food Contact Compliance USA EU Compostability FCN# 1574 Condition of Use B-H OM-6 ( Up to 100°C ) OK Compost 69µm FCN# 1643 Condition of Use C-G OM-2 ( Up to 70°C ) OK Compost OK Compost HOME 85 µm Biodegradable in soil Specifically designed for food contact BioPBS complies with the most stringent food contact regulations of important markets such as U.S. (FDA), EU, and Japan. Indeed, BioPBS is the only PBS on the market with FCN (Food Contact Notification) registration, allowing safe use for food contact packaging in North America, and for brand owners looking to market their products globally. Product range The BioPBS range comprises two lines: • FZ-grade (PBS, industrially compostable) • FD-grade (PBSA, home compostable) 38 bioplastics MAGAZINE [04/17] Vol. 12

Materials Cellulose Metallized Cellulose BioPBS TM By: Fabien Resweber, Vice President Sales & Marketing Chinnawat Srirojpinyo, Division Manager, Marketing Technical Service Pissapak Srihaphan, Marketing officer PTT MCC Biochem Co., Ltd. Bangkok, Thailand Environmental friendly flexible packaging BioPBS has excellent sealant properties, making it a perfect solution for use in biodegradable flexible packaging applications. Such characteristics are of the utmost interest for both Futamura (a leading producer of sustainable cellulose packaging films) and Scientex (a large flexible packaging manufacturer of Malaysia), who selected the BioPBS FDgrade as sealant layer to create biolaminate solutions together with Futamura’s biodegradable and compostable NatureFlex flexible packaging films. The multilayer construction offers excellent sealing characteristics and appearance, together with moisture and oxygen barrier properties. It is suitable for various types of dry food. The full range of laminates using transparent, white, matt and metallized NatureFlex films were exhibited at Interpack earlier this year. “We observe an obvious desire from brand owners to reduce the environmental impact of their packaging solutions. For sure, recyclability is a key trend to better manage the waste and the quantity of plastics involved. However, the multicomponent barrier solution that is needed to ensure longer shelf-life of conditioned goods makes recyclability very challenging! Having a barrier packaging solution that is fully compostable, even in a home backyard, makes a difference for companies willing to reduce the packaging impact and make end-users happy to manage the waste easily,” said Mr. Fabien Resweber, VP Sales and Marketing of PTTMCC. “We see a lot of synergy between BioPBS and NatureFlex in this development. Both are home compostable and BioPBS shows rapid biodegradation, giving a laminate structure the best chance of disintegrating within the target timescale. Moreover, it has reasonable transparency, very low odour – no negative effect on the food, and excellent seal strength and seal-integrity. Its seals qualities are compatible with many other biomaterials.” said Mr. Andy Sweetman, Sales & Marketing Manager of Futamura. “We are delighted to be a part of this development. BioPBS is readily processible and it perfectly matches with NatureFlex.”, said Mr. CM Yong of Scientex. Home Compostable* Mailing Film * According to OK Compost Home and NF T51-800 (11-2015) Typical Properties of compostable flexible barrier packaging Property Unit Transparent Packaging Metallized Packaging Thickness µm 54 74 Tensile Strength MD MPa 45 60 TD MPa 25 35 Elongation at Break MD % 25 20 TD % 85 95 Bonding Strength at 120°C N/15mm 10.5 10.5 C.O.F. (sealing side) 0.2 0.2 WVTR (38°C, 50%RH) g/m 2 ∙day 3.8 1.0 OTR (23°C, 50%RH) cm3/m 2 ∙day∙bar 3.1

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