为什么pu不算?pu技术也是一大类啊……还有pes算不算?
h2no好像不是ptfe类技术,这是他们的声明:
Environmental Impact
To determine the environmental impact, we look at the lifecycle of the product, including end-of-life disposal, and the toxin levels in the manufacturing process. The most environmentally harmful component of a waterproof shell is the waterproof/breathable barrier. It is usually made from three different chemical compounds: polyester (PES, PET), polyurethane (PU) and polytetrafluoroethene (PTFE). As of fall 2008, Patagonia does not use polytetrafluoroethene (PTFE) – the most harmful of the three chemicals – in our waterproof/breathable membrane construction.
http://www.patagonia.com/web/us/patagonia.go?assetid=2790 |