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Gore-Tex is W. L. Gore & Associates's trade name for waterproof, breathable fabric membrane. It was invented in 1969. It was invented in 1969. Gore-Tex blocks liquid water while allowing water vapor to pass through and is designed to be a lightweight, waterproof fabric for all-weather use.
Gore-Tex membrane under an electron microscope. In 1969, Gore was researching a process for stretching extruded PTFE into pipe thread tape when he discovered that the polymer could be "expanded" into a porous form of PTFE, characterized by extremely high strength and porosity. He and others had attempted to stretch rods of PTFE by about 10%.
A closed membrane like Sympatex differs from microporous membranes (such as Gore-Tex) which have microscopic pores that let air (and water vapour) pass through, yet have such low surface energy that the surface tension of any (liquid) water in contact remains too high to allow it to squeeze through the pores. Microporous membranes have ...
W. L. Gore & Associates, Inc. is an American multinational manufacturing company specializing in products derived from fluoropolymers. It is a privately held corporation headquartered in Newark, Delaware. It is best known as the developer of waterproof, breathable Gore-Tex fabrics.
Stefan Walter Hell (German pronunciation: [ˈʃtɛfan ˈhɛl] ⓘ: born 23 December 1962) is a Romanian-German physicist and one of the directors of the Max Planck Institute for Multidisciplinary Sciences in Göttingen, [1] and of the Max Planck Institute for Medical Research in Heidelberg, [2] both of which are in Germany.
This can be accomplished with Gore-Tex. Gore-Tex now has controllable pore size and can block out many liquids, including liquid water and many conservation chemicals. Water vapor can still pass through the pores, though, so it is possible to hydrate the parchment and remove a crease without introducing liquid water to the pigmented image.
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