For architects, specifiers, and manufacturers of high-performance window coverings, understanding the precise technical attributes of materials is paramount. The LEAPKA F4003, part of the esteemed F Series (Thick Plain Weave), is engineered for excellence. This article provides a detailed breakdown of its specifications, explaining what these numbers mean for real-world performance and durability in demanding applications.

Core Material Composition & Physical Properties

At its heart, the F4003 is a composite sunscreen fabric designed for resilience and optimal solar management.

Composition: 30% High-Tenacity Polyester Yarn / 70% PVC Coating. This blend leverages the strength and dimensional stability of polyester with the exceptional environmental resistance, flexibility, and colorfastness of a premium PVC coating.

Weight: 470 g/m² ± 5%. This substantial grammage indicates a robust, durable fabric capable of withstanding significant wind loads and mechanical stress, making it a reliable choice for large windows and commercial applications.

Thickness: 0.65 mm ± 5%. This thickness contributes to the fabric's durability, flat weave appearance, and overall performance stability.

Standard Widths: 200 cm (78 inches), 250 cm (98 inches), 300 cm (118 inches). These wide formats are ideal for modern panoramic windows and reduce the need for seaming in many standard roller blinds projects, ensuring a cleaner aesthetic.

Roll Length: 35 meters. This standard roll length offers efficiency for larger projects and minimizes waste during the fabrication process.

Optical & Functional Performance Metrics

The true value of a sunscreen fabric lies in its ability to manage light and heat without sacrificing views.

Openness Factor: 5%. This precise degree of openness is a critical performance sweet spot. It effectively blocks and diffuses a significant portion of direct solar radiation and UV rays, reducing heat gain and protecting interiors from fading, while still preserving outward visibility and allowing for the penetration of soft, natural light. It effectively reduces glare on screens without plunging a room into darkness.

Yarn Count: 36 x 34 threads per inch. This specifies the density of the weave. A balanced and relatively dense count like this contributes to the fabric's stability, durability, and consistent appearance.

Yarn Diameter: 0.42 mm x 0.42 mm. The use of thicker yarns compared to thinner series enhances the fabric's strength and contributes to its distinct texture and visual appeal.

Fabrication & Compatibility

The F4003 is designed for seamless integration into professional manufacturing processes.

Cutting: Compatible with cold cutting, and crush cut methods. This versatility allows blind manufacturers to use their preferred equipment to achieve clean, precise edges without fraying.

Seaming/Hemming: Engineered to work perfectly with thermal, high-frequency,  as well as traditional sewing. This ensures strong, reliable, and aesthetically pleasing joins and hems for any style of roller blinds fabric system.

Durability & Maintenance

Built to last, the F4003 requires minimal upkeep.

Cleaning: Simple maintenance involves regular dust removal with a vacuum cleaner  or compressed air. For more thorough cleaning, a gentle rinse with clean water is sufficient. The robust PVC coating resists staining, and minor marks can often be gently erased with a clean white pencil eraser.

Longevity: The 70% PVC coating provides excellent resistance to moisture, mildew, and environmental pollutants. It is imperative to avoid harsh solvents or abrasive cleaners that could damage the coating's protective properties.

Conclusion: The Specification Advantage

The LEAPKA F4003 Grey/White is not just another sunscreen fabric; it is a precisely engineered system. Its technical parameters—from the robust 470 g/m² weight and 5% openness to its versatile fabrication compatibility—are meticulously chosen to deliver reliable, long-lasting performance. For professionals seeking a proven, high-quality material for creating effective and durable sun control solutions, the F4003's specifications speak volumes about its capability and value as a premier roller blinds fabric.