en.Wedoany.com Reported - French composite materials manufacturer Epsilon Composite (based in Gaillan en Médoc) has announced that its production of carbon fiber tubes using the patented K1 technology has surpassed the 100,000-unit milestone. This process is designed to enable the industrial production of large composite tubes that combine high longitudinal stiffness, optimized weight, and precise geometric characteristics. Epsilon states that this milestone marks a significant advancement in the company's business activities, where its core pultrusion expertise is being complemented and integrated with the filament winding process.

The K1 technology integrates the filament winding process with pultruded longitudinal reinforcements. Through this technology, Epsilon can produce carbon fiber tubes with diameters up to 800 mm and lengths up to 12 meters, featuring high geometric precision and dimensional stability. These tubes can withstand significant bending or transverse loads, with longitudinal modulus values reaching up to 400 GPa.

In addition to K1 technology, Epsilon Composite offers industrial-grade filament winding capabilities to meet a wide range of technical requirements. The company can support projects requiring ultra-stiff tubes using ultra-high modulus carbon fiber, as well as thinner, more specialized, or more traditional structures when the application does not require integrated pultruded longitudinal reinforcements.

Epsilon's expertise covers the complete development chain, from initial customer requirement analysis to final component delivery. Its engineering department assists clients in defining composite structures, selecting fibers and resins, optimizing ply orientations, performing mechanical sizing calculations, conducting numerical simulations, developing prototypes, carrying out qualification testing, and managing the industrialization process for mass production.

This approach is a necessary prerequisite for tailoring filament-wound structures to meet the specific constraints of each application, including stiffness, weight, dynamic performance, geometric accuracy, operating environment, and qualification requirements.

The company also performs all critical post-manufacturing operations for composite tubes, including precision machining, grinding with dynamic runout tolerances as low as 5 microns, dynamic balancing, assembly, and surface finishing according to application requirements.

The composite tubes produced are particularly suitable for technical rollers (used in the film and flexible material converting, printing, coating, and processing industries) as well as the yachting sector.

Alexandre Lull, Deputy General Manager of Epsilon Composite, stated: "For nearly 40 years, Epsilon Composite has been recognized as an expert in carbon fiber pultrusion, which remains our core business. However, this expertise has been extended through a diversification strategy initiated in the early 2000s around large-diameter carbon tubes, encompassing another composite manufacturing process: filament winding. Beyond the symbolic milestone of 100,000 K1 tubes, this figure demonstrates industrial maturity and our ability to transform advanced composite structures into a fully controlled mass production process, supported by non-destructive testing, finishing operations, repeatability, and the quality standards expected by demanding industrial clients."

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