There is a definition of piping cord: “Piping cord is a thin, round cotton “rope” made especially for sewing. It comes in a variety of thicknesses, depending on how full you want your finished piping to be. To make piping, you take a bias strip and fold it over the piping cord. To attach it to your article you sew the open end into the seam.”
TPU piping cord is the piping cord made of TPU material. TPU is an eco-friendly plastic material, which has no harm to human or environment. Cotton piping cord can be used for clothes and canvas bags. However, some waterproof bags, saddle and other outdoor products usually use leather or plastic piping cord. Leather piping cord is a good choice, but it is easy to get worn. Then plastic piping cord such as PVC or TPU one become popular. Both PVC piping cord and TPU piping cord is waterproof, but PVC one is not eco-friendly. Some cheap PVC cord even be smelly. If you need to shape a high quality waterproof or fashion bag, you can try TPU piping cord.
There are several types TPU piping cord. The one is glossy / matte TPU piping cord. This type of piping cord is made of 100% TPU material and it’s round part is solid. This is a regular type.
Another one is also made of 100% TPU material, but it is the special custom one. It’s round part has a hole or the flat part has two wings. For us, this type is in special shape.
The last one we introduce here is the colorful TPU piping cord. This is a type of TPU piping cord made of TPU material and polyester rope cord. The round part is polyester cord outer coated with TPU while the flat part is still pure TPU. Usually, this type of piping cord is used clear TPU rather than colored TPU material.