In terms of material adaptability, the stage backdrops used in drama performances are not only irregular in shape, but some are also made of fragile materials such as paper and fabric. Moreover, their surfaces are often printed with delicate patterns or painted with colorful designs, which imposes extremely high requirements for protection during the hoisting process. To address this, the rope body of the lifting sling for stage lighting equipment abandons the high-hardness polyester fiber or steel wire rope materials commonly used in industrial lifting slings. Instead, it adopts a highly flexible blended fabric made of nylon fiber and cotton fiber. This fabric not only meets the load-bearing performance requirements (with a rated load capacity usually ranging from 50kg to 200kg, which can satisfy the hoisting needs of small and medium-sized equipment on drama stages), but the lifting sling for stage lighting equipment also possesses excellent flexibility and conformability. When hoisting irregularly shaped stage backdrops, the rope body can naturally bend along the curvature of the backdrop surface, evenly wrapping around the stress points of the backdrop and preventing the backdrop from deforming due to excessive local pressure. At the same time, the blended fabric has a smooth and soft surface, which will not cause scratches or abrasions when in contact with the backdrop surface, effectively protecting the integrity of the backdrop's appearance. In contrast, industrial lifting slings mostly use hard materials to pursue high strength and wear resistance. When hoisting irregularly shaped equipment, they tend to suffer from uneven local stress, which not only makes it difficult to fix the equipment but also may scratch the equipment surface. Obviously, they cannot meet the special needs of drama stages.
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