QISO® quasi-isotropic fabric is balanced in a single layer of braid. Stronger, lighter and more efficient, QISO® enables significant cost savings and superior performance.
Pound for pound, QISO is equivalent in costs to standard fabrics and provides additional cost savings due to:
Simple and Efficient Processing:
No need to orient plies. QISO has equal amounts of fabric in every direction, providing uniform stiffness in all directions and enabling easy lay-up.
Reduction in Waste:
QISO's uniformity in all directions enables efficient use of the fabric. Pattern cutting is simplified and material usage is optimized.
Benchmarked against a comparable woven laminate, QISO outperforms woven fabrics in tension, compression and open hole. In an impact event, interlaminar shear stresses are reduced due to QISO's uniform ply architecture, resulting in better energy absorption and higher impact resistance.
Balance in a Single Layer:
Each ply of QISO represents a balance 0o / +45o / -45o / 90o lay-up
To achieve a balanced laminate with conventional 0/90 fabrics, four layers or a multiple of four layers is required. QISO is balanced with a single ply, so the fabricator has the flexibility to use the exact number of plies necessary to meet strength and stiffness requirements. QISO allows the efficient use of material to minimize part thickness and reduce material and labor costs.
QISO has the same properties in every direction, so there is no need to orient plies. QISO also allows for simple and efficient nesting of patterns. With woven fabrics, cutting based on fiber orientation results in excess waste.
Testing was performed comparing QISO-H laminates and Plain Weave laminates of the same thickness. The QISO-H laminate was comprised of 6 aligned plies of 536 gsm fabric. The Plain Weave laminate was comprised of 4 plies of 800 gsm fabric with a quasi-isotropic lay-up ([0o / +45o]2s). The fiber for both laminates is Toray T700S 12k, and the resin is Tencate TC275-1. All results have been normalized to 55% Vf.