More environmental friendly alternatives for biobased materials in tires
Heidi Beers – Eco Efficiency specialist at Teijin Aramid Subjects
Intrinsic Green tires: Recycled PET sustainability of comparison on versus virgin Twaron function PET Teijin Limited: global presence Products Teijin Aramid Intrinsic sustainability of Twaron in applications
Light Strong Density 1.44 g/cm3 5 times stronger than steel at the same weight.
Resists heat Endurance LOI - 29-37% Low maintenance Decomposition 500 oC No corrosion
Overview of applications
Taking the heat in the brakes
Creating durable tires For vehicles that save lives
When steel fails Worry free oil Increased transport lifetime automotive & industrial hoses
Longer lasting Twaron keeps transmission belts us on-line How does the intrinsic sustainability of Twaron match with tire developments?
Requirements for tire developments: Lower weight tires • Leading to lower rolling resistance
• Less CO2 and particulate matter emissions
Less raw materials needed Requires high strength yarns (per mass unit) Rough comparison on amounts of materials needed for reinforcement: • Twaron: rayon = 1:3 • Twaron: PET = 1:2
Steering precision Requires dimensional stability
Subjects
Intrinsic Green tires: Recycled PET sustainability of comparison on versus Twaron function Virgin PET What is a “green” tire?
A a tire made 100% from natural materials? B a tire that results in a better eco performance over the whole life cycle (value chain)? Where is the biggest environmental impact in the value chain? Rayon replacement in carcass
Rough comparison on amounts of materials needed for reinforcement: Twaron: rayon = 1:3 Twaron: PET = 1:2
RAYON CORDS TWARON TWARON/PET or or IN CARCASS CORDS CORDS 67 gr Twaron 300 gr rayon 100 gr Twaron 67 gr PET 600 gr rubber 200 gr rubber 270 gr rubber compound compound compound
Information: based on public available literature and patents Rayon replacement in carcass
REINFORCEMENT HYBRID RAYON FULL TWARON MATERIAL: TWARON/PET
67 gr. Twaron 300 gr. Rayon 100 gr. Twaron Relevant aspects 67 gr. PET 300/600 gr. rubber 100/200 gr. rubber 135/270 gr. rubber
Rolling resistance - + ++ RAYON Dynamic stiffness + + ++
Comfort 0 0 - TWARON / PET Fatigue + + 0
Lower weight - + ++ FULL TWARON
Commercially feasible - + -/0
Information: based on public available literature and patents From kg to function: Global Warming Potential
GWP per kg (incl. dipping) GWP per function (incl. rubber)
/ / kg
/ / carcass
eq
eq
-
-
2
2
Kg CO Kg Kg CO Kg How? Eco Comparison passenger Efficiency Approach of TUV certified tire carcass Customer Benefit 1. compare on function over total value chain Model. - what, how much (raw materials, production) - how long, how well (use phase) 2. Check all effects over the total value chain 3. Focus on the differences 4. Be conservative
VERY IMPORTANT 5. Involve from the start and discuss the results with customers and value chain partners: do they agree? Are there other views that need to be taken into account?
Is it both environmentally better, and is it a business case? Differences in the value chain:
WHAT AND HOW MUCH HOW LONG, HOW WELL
MANU- RAW MATERIALS FACTURING DISTRIBUTION USE PHASE END OF LIFE
Less Less Fuel savings Twaron/PET raw materials: equal material less transport lighter tire, less equal Twaron, PET Rubber ecoburden and costs rolling resistance
More More Rayon raw materials: equal material, more transport equal Rayon Rubber ecoburden and costs
Benefits for tire manufacturers Benefits for car producers and Better CO2 footprint consumers (drivers, fleet owners) Less costs Lower fuel use for raw materials Better CO2 footprint, less costs! Subjects
Intrinsic Green tires: Recycled PET sustainability of comparison on versus Twaron function Virgin PET Rayon replacement in carcass
Rough comparison on amounts of materials needed for reinforcement: Twaron: rayon = 1:3 Twaron: PET = 1:2
or or RAYON HYBRID HYBRID Twaron with Twaron with VIRGIN PET RECYCLED PET
Information: based on public available literature and patents Rayon replacement in carcass
REINFORCEMENT TWARON/ TWARON/ RAYON MATERIAL: VIRGIN PET RECYCLED PET
67 gr. Twaron 67 gr. Twaron 300 gr. Rayon 67 gr. virgin PET 67 gr. recycled PET Relevant aspects 600 gr. rubber 270 gr. rubber 270 gr. rubber
Rolling resistance - + + RAYON Dynamic stiffness + + +
Comfort 0 0 0 TWARON / VIRGIN PET Fatigue + + +
Lower weight - + + TWARON / RECYCLED PET
Commercially feasible - + +
Information: based on public available literature and patents From kg to function: Global Warming Potential
GWP per kg (incl. dipping) GWP per function (incl. rubber)
/ / carcass
/ / kg
eq
eq
-
-
2
2
Kg CO Kg Kg CO Kg Conclusion:
A Biobased is not always better B Calculate per function together with chain partners Thank you for your attention
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