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New Mazda bio-based engineering plastic features high-quality finish without paint; suitable for exterior parts

Mazda Motor Corporation, in conjunction with Mitsubishi Chemical Corporation, has developed a new bio-based engineering plastic that can be used for exterior design parts for automobiles. The new plastic will help Mazda to reduce its impact on the environment in a number of ways.

As the plastic is made from plant-derived materials, its adoption will help to curb the use of petroleum resources and reduce carbon dioxide emissions. Furthermore, the material can be dyed and emissions of volatile organic compounds associated with the painting process reduced. Dyed parts made from the bio-based engineering plastic feature a finish of higher-quality than can be achieved with traditional painted plastic. The deep hue and smooth, mirror-like finish of the surface make the newly-developed plastic suitable for external vehicle parts with a high design factor.

Mazda will display prototype “Mazda Biotechmaterial” parts made from the bio-based engineering plastic at Eco-Products 2014—one of Japan’s largest exhibitions of environmental technologies and environmentally-friendly products and services—11-13 December at Tokyo Big Sight.


Mazda has been proactively developing technologies in the biomass field for a number of years. To date, under the “Mazda Biotechmaterial” name, the company has succeeded in developing the automotive industry’s first high-strength heat-resistant plant-derived bioplastic for auto interior parts, and the world’s first biofabric for vehicle seat upholstery made entirely from plant-derived fiber.

However, to be suitable for exterior parts, plastics are required to possess not only a high quality finish, but also excellent weather, scratch and impact resistance in order to stand up to harsh environmental factors to which they are exposed. Achieving this combination of characteristics with bioplastics has posed a technical challenge.

Now, Mazda says it has succeeded in making a material suitable for both interior and exterior parts. This has been achieved by optimizing the composition of a newly developed, highly moldable and durable bioplastic base material with additives and coloring agents (patent pending), and optimizing molding specifications. This will enable the company to produce parts that are as durable as conventional painted ABS plastic parts yet feature a higher quality finish.

This bio-based engineering plastic will be used for the first time for interior parts for the all-new Mazda MX-5 which will be launched globally in 2015. Moving forward, it will be used for exterior parts in other production models.

Mazda will continue proactively developing unique technologies to help achieve a sustainable society with the aim of developing products that provide both driving pleasure and outstanding environmental and safety performance.



Re-enforced paintless plastics could last longer, reduce total weight and cost of future vehicles?

Paint manufacurers and paint shops may not like .


Repair Shops will also lose business as minor scrapes should be repairable with fine grit paper.


Flexible plastic bumpers could absorb part (more) of the shocks and reduce damage to others.

Much lighter vehicles and more driver assistance would also help to reduce damages, injuries and casualties on impacts.

Heavy vehicles should be restricted to right lane.


Less than meets the eye. Bumper covers, mirror housings and spoilers can be made of this stuff, but these components are normally totalled in a fender bender, so they will be totally replaced. Paint shops do not like repainting less than a complete car anyway, but even with fine grit paper, there will still be a need to polish, buff, and possibly enamel.

To make matters worse, this material may cause the revival of ragtops. If you can extrude rather than metal stamp a roof, why not bring back 70's styling?

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