Basic 100F Profile
External Retractable Blinds & External Venetian Blinds / Louvres - Basic 100F Profile
Basic 100F L3 W SURE SHADE® Basic 100F L3 W
Basic wind loading models for Retractable external venetian blinds use ladder braid methodology, similar to internal venetian blinds. The ladder braid, made of woven polyester with extruded ladder strings, controls the slat or louvres movement. The blind slat is tilted by adjusting the ladder string using a bearing, lifting tape, and motor.
Quality Variations in Reinforced Ladder Braid:
- Kevlar/Aramid polymer, used for reinforcement, is slippery and demands precise weaving techniques to prevent slipping.
- Double over locking of Kevlar/Aramid reinforcement during ladder braid weaving prevents stretching over time.
Challenges in Slat Fixing and Rotation Stability:
- Methods to fix slat to ladder braid are varied, but there is no foolproof way to prevent slat slipping due to wind loading or braid stretching.
- Attempts at slat rotation stability include single or double over locking of ladder cross strings, but these methods are primitive in design and prone to failure.
Issues with Lift Tape Holes and Wire Guides:
- Sharp raw edges on lift tape holes can cut through lift tapes over time due to wind vibration, requiring replacements.
- Wire guides made of untreated or galvanized steel are prone to rust. SURE SHADE® uses stainless steel wire guides coated with PA12 for durability and resistance to corrosion and abrasion.
Slat Flexibility:
- The blind slat profile SURE SHADE ® Basic 100F is 100mm wide and can only be controlled by ladder braid and has flexibility of movement under wind load or use. This excessive flexibility of the blind slat has a significant drawback as the slat can either rotate around the ladder string or distort and flatten against the glazing in the wind causing excessive instability, movement, noise and block out of light.
External venetian blinds, with their innovative designs and shading capabilities, continue to be effective solutions for various architectural needs. By addressing the complexities associated with ladder braid, slat rotation, and stability, manufacturers can enhance these blinds functionality and durability. Thoughtful engineering and material choices pave the way for reliable, long-lasting, and aesthetically pleasing shading solutions, ensuring satisfaction for both businesses and homeowners alike.
