молния

Waterproof and airproof zipper, simply called Airproof zipper, is a special zipper used in navigation and diving which makes a feature of airproof and waterproof with high safety. It is meshed by the teeth inside the adhesive tapes by a slider and then the flexible adhesive tapes join closely due to the compression from the outside teeth and at last achieve absolutely airproof. It can prevent the liquid, air, gas, water, smoke, dust and light. It is divided into two types: open top and ends closed. Open top zipper suits open top soft container such as heat preservation life jacket, protective clothes (gas, oil, chemical protection) and etc. Ends closed zipper suits diving suit, water walking ball, airproof luggage, altiplano first aid pressure bag and so on. Technical Specifications Testing itemSpecificationsSlider fastener breadth70mmChain width7mmChain tension strength≥ 510N/inSlider action docking≥ 175NSlider block break strength≥ 700NAirproof pressure test≥ 300KpaSlider action closing≤ 75NSlip strength≤ 55NReciprocating times≥ 1000times