Designers & Engineers: Tired of Warped Polyamide Parts? Meet PolyArylAmide (PA MXD6)!

Hallo and welcome to a new blog post on one of my favorite high performance Polyamides: PA-MXD6 (also known as Nylon MXD6, or simple PARA). 

When designing with glass fiber-reinforced polymers, warpage is a common challenge—especially as fiber content increases. But what if you could achieve both high strength and dimensional stability?

Warpage Comparison: PA 6.6-GF30 vs PA MXD6-GF50

Figure 1 compares the warpage behaviour of a plate moulded in PA 6.6-GF30 and PA-MXD6-GF50. The graps shows that: 

🔹 PA-MXD6-GF50 (50 wt% glass fiber) shows dramatically lower warpage and anisotropy than standard PA 6.6 GF30 (30 wt% GF)—even with a 20 wt% higher glass content!

🔹 Lower anisotropy means your parts stay true to design, reducing costly rejects and post-processing.

🔹PARA’s unique structure minimizes the difference between parallel and transverse shrinkage, delivering precision and reliability for your most demanding applications.

Figure 1: Warpage comparison of PA 6.6-GF30 vs PA MXD6-GF30 and PA MXD6-GF50 [3].

Why compromise? Choose PARA for your next polymer selection project to achieve:

• Tighter tolerances
• Superior aesthetics
• Consistent, high-quality parts

More on PA-MXD6 / PARA here: 

Polyarylamide vs Polyamide (PARA vs PA): What are the Major Differences Between PARA and PA (Polymer Material Selection Tip)?

Design Properties for Engineers: The ABCs of Polyarylamide (PARA; MXD6)

PA6.6 vs. PARA - Reducing the Wall Thickness of Injection Moulded Parts (Geometry Optimization Example)

Design Data for PolyArylAmide (PARA; PA MXD6) Selection: Mechanical Properties as Function of Temperature and Humidity

Mastering Injection Molding Tools for High Performance PolyArylAmide (PARA; PA MXD6): 6 Key Steps to Success

Design Properties for Engineers: Superior Gas Barrier Properties of PolyArylAmide (PARA; MXD6)

Check out my Micro Training below too:

And my dedicated Polyarylamide Hub here.

Thanks for reading & #findoutaboutplastics

Greetings,

Herwig Juster

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Literature:

[1] https://www.carbonele.com/news/pa-mxd6-material-properties-and-applications/

[2] https://onlinelibrary.wiley.com/doi/10.1002/app.56089

[3] https://www.syensqo.com/en/chemical-categories/specialty-polymers/technical-literature

[4] www.polyarylamide.com

[5] https://www.researchgate.net/publication/334669698_Effect_of_Fillers_and_Processing_Parameters_on_the_Shrinkage_of_Injected_Molding_Polyamide_66/link/5d39300292851cd04684421d/download?_tp=eyJjb250ZXh0Ijp7ImZpcnN0UGFnZSI6InB1YmxpY2F0aW9uIiwicGFnZSI6InB1YmxpY2F0aW9uIn19

[6] https://www.materialdatacenter.com/ms/de/Reny/Mitsubishi+Engineering-Plastics+Corporation/Reny+1002H/7617eb67/1617