By investing in state-of-the-art European machinery, Yas Kiseh has the capability to produce various PP valve bags at the highest speed and quality. The automated CONVERTEX conversion line enables us to manufacture AD proTex® bags with six-color printing, complete precision, and uniformity.

The polymer fabric production process in this unit begins with state-of-the-art Tiratex technology and fully automated extrusion lines. In the first stage, premium polypropylene (PP) granules, combined with UV stabilizers and reinforcing additives, are melted and transformed under precise longitudinal stretching into polymer tapes with high tensile strength. Continuous monitoring of technical parameters such as denier uniformity, thickness, and tensile stress of the tapes at this stage ensures the fundamental strength of the bags. Subsequently, the produced tapes are transferred to specialized circular looms and woven with standard density and seamless construction into tubular fabric rolls offering exceptional resistance to impact, moisture, and the pressures of cement loading.

To completely seal the woven fabrics and elevate the protective standards of the bag, the fabric rolls enter extrusion coating lines powered by Ecotex technology. In this process, a thin, homogeneous layer of specialized polymer copolymers is applied onto the fabric surface with micron-level precision. While forming a strong molecular bond with the underlying weave, this maximizes the bag's resistance to moisture, water penetration, and environmental factors. Simultaneously, utilizing a micro-perforation system (creating microscopic breathable pores) allows for rapid air evacuation during high-pressure cement filling without dust leakage. Furthermore, applying surface modification (Corona Treatment) and imparting thermal weldability at this stage ensures the necessary foundation for high-quality printability and the production of seamless, adhesive-free block-bottom valve bags in subsequent stages.

To achieve the highest printing quality on cement bags, we utilize the advanced SERVOTEX system—a specialized technology developed by Windmöller & Hölscher (Germany), specifically engineered for flexographic printing on woven fabrics and industrial sacks.With simultaneous 6-color printing capability, this machine enables the execution of diverse designs, intricate details, and uniform colors. The use of advanced servo-drive systems, precise print process control, and uniform ink transfer ensures consistent, professional quality at every stage of production.In the SERVOTEX SL model, Sleeve technology allows for rapid and precise plate changes, reducing setup times for different orders. Combined with Revision visual inspection and quality control systems, this technology enables accurate print monitoring and high-resolution defect detection.The combination of 6-color printing, Sleeve technology, and precise quality control allows us to produce bags with crisp, accurate, uniform, and durable printing—delivering a visual quality that meets modern packaging industry standards.

In the conversion and finalization stage of cement bags, we utilize the advanced CONVERTEX CL-170 machine—one of the most modern generations of cement bag manufacturing equipment, achieving an outstanding production capacity and efficiency of 170 bags per minute. Developed by the German company Windmöller & Hölscher, this machine is engineered with a focus on high-speed production while maintaining uniform bag quality.Its advanced technology enables fast and stable production alongside precise process control. The integration of a nano-perforation system allows for the creation of highly accurate and uniform micro-pores in the bag structure, improving performance during the filling process.Furthermore, the intelligent bag defect detection system continuously monitors the production process to identify imperfections and prevent defective products from reaching the final stage. The combination of high speed, smart automation, and strict quality control makes CONVERTEX one of the most critical components of our production line for achieving high capacity, consistent quality, and manufacturing precision simultaneously.