Patent attributes
The present invention provides a novel airtight and waterproof slide fastener woven from nylon, comprising a fastener tape and a fastener element. The nylon fastener element is woven on a tape made of high-strength polyester threads. A thermoplastic polyurethane eslatormer (TPU) layer is formed on the fastener tape on the back of the slide fastener. The TPU layer is permeated into gaps on the fastener tape and into gaps on the fastener element, and the TPU layer on the back of the fastener element has a thickness greater than that of the TPU layer at the location of the fastener tape to form a first TPU ridge. The first TPU ridge is cut from the middle. The surface of the first TPU ridge is heated and then squeezed to form a second TPU ridge.
