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      06-20-2025, 01:42 AM   #1
Mani59
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BMW creates Flax Fiber to replace Carbon Fiber

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Article from The Drive.


BMW's carbon fiber parts will soon be replaced with a lightweight, flax-based natural fiber, and it's hitting mass production for consumer cars soon.

BMW‘s carbon fiber roof parts will soon be replaced with plant fiber. When the BMW M4 GT4 hits the Nürburgring for its next 24-hour race, it’ll be race-testing the same flax-based natural fiber composites. I don’t think that means you’ll be able to eat your Bimmer (yet), but it should make their construction more environmentally friendly.

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Visible trim pieces on M cars that have been carbon in the past will start to be replaced with this similar-looking plant stuff. BMW announced this week that its flax-fiber (not the official name) has been “confirmed for series maturity,” meaning ready for mass production.

The German automaker been working with Swiss clean-tech company Bcomp for several years to develop new lightweight composites from renewable raw materials. And while natural fibers have been tested in BMW’s racing cars for some time (Formula E in 2019, M4 GT4 and DTM later), the idea is finally making its way to road cars.

BMW has a stake in Bcomp through its venture capital arm, called BMW i Ventures.

The ultimate goal is to reduce carbon emissions (at a corporate level—not the tailpipe emissions of the individual cars it’s fitted to). As the brand states in its release, “Lightweight construction has long been a crucial development field for the BMW Group. The use of natural fibers with a reduced CO₂e footprint in composite materials has become increasingly important. Materials tests have demonstrated the fibers’ great suitability, especially for visible exterior and interior components.”

Soon, BMW’s going to swap carbon fiber roofs in its road cars for this stuff, claiming that it’ll cut corporate emissions by “around 40% in production.” I’m into it—looks good in these demo photos the company shared.

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Link to article: https://www.thedrive.com/news/bmw-in...our-next-m-car

Photos: BMW Press Release
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      06-20-2025, 05:53 AM   #2
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Watch it sucks ass compared to the real thing - just like every other green alternative material. Vegan “leather”, water-based paints etc.

In before the disappointment.
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      06-20-2025, 06:32 AM   #3
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In the same kettle as biodegradable wire harness insulation.
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      06-20-2025, 06:52 AM   #4
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A big part of the appeal of carbon fiber is the look, which is why forged carbon, and this natural fiber won't really take off. The only good thing (IMO) about the new types of fiber weave is that they will make the older type less expensive.
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      06-20-2025, 10:22 AM   #5
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Quote:
Originally Posted by chassis View Post
In the same kettle as biodegradable wire harness insulation.
exactly and eaten often by rodents including on mil vehicles lol
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      06-20-2025, 10:27 AM   #6
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Interesting shift, if it holds up like carbon and cuts emissions, I’m in. Hope it’s more than just marketing fluff.
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      06-20-2025, 11:24 AM   #7
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I'll only consider if they try to make a submersible out of it....
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      06-20-2025, 11:48 AM   #8
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Looks like wicker outdoor furniture
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      06-20-2025, 02:13 PM   #9
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      06-20-2025, 03:30 PM   #10
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Zolt was kind of the forerunner, I owned stock in them at one time probably twenty years ago. https://zoltek.com/products/
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      06-20-2025, 03:31 PM   #11
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its not as stiff as carbon fiber but more impact resistant.
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      06-20-2025, 04:13 PM   #12
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That weave looks terrible.
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      06-20-2025, 04:38 PM   #13
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It's ugly. They need to do something about how it looks.
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      06-20-2025, 04:56 PM   #14
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Quote:
Originally Posted by Mani59 View Post
The ultimate goal is to reduce carbon emissions
Is it, though?
Should it be the "ultimate" goal for the ultimate driving machine brand?

Quote:
Originally Posted by Gemini562 View Post
Interesting shift, if it holds up like carbon and cuts emissions, I’m in.
It wont:
  • While natural fiber-reinforced polymer (NFRP) composites offer significant benefits in sustainability, cost-effectiveness, and lightweight properties, they also present challenges. Moisture absorption leads to swelling, reduced strength, and microbial growth, limiting their use in humid or wet conditions. Poor interfacial adhesion between hydrophilic fibers and hydrophobic polymers weakens bonding, compromising durability. Surface treatments and coupling agents can improve adhesion but add complexity and cost to manufacturing, making large-scale applications less attractive.
  • Furthermore, natural fibers exhibit significant variability in their properties due to differences in species, growing conditions, and processing techniques, which can lead to inconsistencies in the performance of NFRP composites.

I'll avoid for now, while you go ahead and enjoy your moldy deliminating NFRP composite roof!

https://www.plasticsengineering.org/...20perspectives

a
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      06-20-2025, 05:04 PM   #15
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Basically the same thing...
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      06-20-2025, 05:22 PM   #16
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Let me guess, we'll get less and pay more. Green new steal bullshit never ends.
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      06-20-2025, 05:27 PM   #17
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The weave reminds me of fake hydro-dipped cf parts.
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      06-20-2025, 05:58 PM   #18
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So the soy harnesses get eaten by mice etc. so now here go your soybon fiber parts too 😆
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      06-20-2025, 06:01 PM   #19
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lol what is this crap? As someone else mentioned bet they charge more for less. The basket weave look is not it. Did any consumer ask for this? Do better BMW.

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      06-20-2025, 06:04 PM   #20
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It’s April 1st right?



Right?
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      06-20-2025, 06:05 PM   #21
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I mean it’s pride month after all.
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      06-20-2025, 06:09 PM   #22
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As ridiculous as the EUs proposed ban on carbon fiber
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