Your sketch may have spokes and curved lines, or a completely different shape. Spiders make different kinds of webs. This example is an orb web, meaning a round web.

In a typical glue-droplet orb web, dry silk supports a sticky capture spiral. Silk is a material a spider makes into threads. A spiral is a curve that winds around a center. Tiny sticky drops on the capture thread help hold prey, the animals a hunter catches.

Not every thread is sticky. But plain support lines are not the whole explanation for a spider avoiding the trap. Scientists studying two orb-weaving species found that leg hairs, careful leg movements and a surface coating helped reduce sticking.

The spider can contact sticky lines too. So "it never touches the sticky parts" is not enough. Your tape model can compare plain and sticky places. It cannot show the protection on a living spider’s legs.

If you cannot find a web, does that mean there are no spiders nearby? A missing web does not settle the question.

Some spiders hunt without building a capture web. A jumping spider, for example, can hunt actively. It still makes silk. Silk and a prey-catching web are not the same thing.

Silk can form a safety line called a dragline. It can also cover eggs in an egg sac. Some spiders make a silk retreat, a place to rest. These are different jobs from holding prey in a sticky trap.

Your paper model shows one job for silk: a capture structure with plain and sticky parts. It leaves out these other uses. Think back to your first sketch. Seeing threads does not automatically tell you their purpose, and not seeing a web does not tell you that an animal cannot make silk. Keep the structure and its job separate.