> Plastic rivets are used in most things – from computers to panel fasteners in rockets. In most cases – not all – the rivet you use should have the same mechanical properties as the materials the rivets are intended to join. This means, for example, that plastic snap rivet fasteners can be used to join soft materials, such as other plastics, urethane and rubber.
HDPE and other plastic sheets are available online in various sizes, can be joined with rivets, rivnuts or plastic welding.
None of those fasteners are rivet nuts, the submission topic.
Most of them cannot be installed blind; they require a mating piece on the other side to push into.
Rivet nuts don't require access to the opposite side. In all likelihood, they cannot be made of plastic; they depend on the the deformation of metal on the blind side forming a rigid bead which holds the part firmly place.
> Plastic rivets are used in most things – from computers to panel fasteners in rockets. In most cases – not all – the rivet you use should have the same mechanical properties as the materials the rivets are intended to join. This means, for example, that plastic snap rivet fasteners can be used to join soft materials, such as other plastics, urethane and rubber.
HDPE and other plastic sheets are available online in various sizes, can be joined with rivets, rivnuts or plastic welding.