Under approval number H0000-820-114402 dated 10 June 2026, Spinteks Tekstil İnşaat Sanayi ve Ticaret A.Ş. has been listed on the Turkish Aerospace (TUSAŞ) Approved Supplier List under the scope of Composite Manufacturing. The certificate is issued in Spinteks’s name because Spinteks is the manufacturing legal entity within the group; Aeropreg A.Ş., as a Spinteks subsidiary, carries out prepreg production under this umbrella.

The domestic materials agenda discussed across SAHA panels is not new to us — it is the premise of what Aeropreg was built to do. Spinteks has been producing carbon fiber fabric in Türkiye since 2011; prepreg manufacturing has been carried out by Aeropreg A.Ş. since 2024 under AS9100 certification. Turkish Aerospace approved supplier status now opens this capability directly to Türkiye’s largest aerospace OEM and its program portfolio.

Most structural prepreg discussions start with carbon fiber and epoxy. That system covers the vast majority of primary and secondary aerospace structures, and for stiffness-driven, weight-critical applications it remains the right answer. But there is a class of applications where the requirements profile is fundamentally different — and where quartz fiber combined with a cyanate ester matrix delivers capabilities that carbon/epoxy cannot match.

Quartz (fused silica) fiber is an amorphous silicon dioxide material. Its defining characteristic — compared to E-glass, S-glass or carbon — is its combination of very low dielectric constant (typically around ε_r ≈ 3.78) and very low loss tangent (tanδ ≈ 0.0001). For structures that must transmit or not distort electromagnetic signals — radomes, antenna windows, radar-transparent housings — this is not a secondary property but the primary design driver. Carbon fiber, which is electrically conductive, is simply not usable in these applications. Glass alternatives exist but quartz offers superior dielectric stability across a wider temperature and frequency range.

The matrix choice matters as much as the fiber. Epoxy resins, while excellent for most structural prepreg applications, have relatively high moisture absorption and their dielectric properties degrade meaningfully with humidity — a significant issue for radome applications where electromagnetic performance must be stable across operating environments. Cyanate ester resins offer substantially lower moisture uptake, higher service temperature capability (Tg typically in the 250–300°C range depending on formulation), and better dielectric stability. The combination of quartz fiber and cyanate ester matrix therefore gives you a laminate that is simultaneously RF-transparent, thermally robust, and dimensionally stable — three requirements that frequently appear together in demanding aerospace and space applications.

Three application areas where this material system is particularly relevant:

Quartz / cyanate ester prepreg is part of the Aeropreg product range. If your program involves any of the above application areas, we’d be glad to discuss material selection, cure cycle, and qualification pathway in detail. Given Türkiye’s accelerating space and radar-platform programs, the timing for these conversations is worth getting right.