Polypropylene grasses

Edel Grass knitted nylon-6,6 and tufted polypropylene fabrics Edel Grass Netherlands... 

The entire installation is finished with a carpet of synthetic grass, which comprises usually a woven polypropylene lattice in which tufts of green polypropylene fibre or filament are fixed. The lattice is sealed on the under-side with a bonded film—which keeps the tufts in place and may be made from polyethylene, polyurethane, rubber latex, or vinyl plastisol. 

Sporting equipment would be much more primitive. Skis would be wooden and ski boots, leather. Ski clothing, too, would be heavy and bulky, because it would be made of wool—no polypropylene to wick perspiration away from the body, no fleece, or breathable, waterproof expanded polytetrafluoroethylene (PTFE) such as GoreTex. Baseball, football, and soccer would be played outdoors in stadiums with real grass, a situation that some would prefer. The balls would get quite heavy in the rain, because they would be covered in leather. Football helmets, too, would be leather and would not offer much protection. A good golfer would drive a golf ball about 40 to 50 yards fewer. Cameras would be very heavy and awkward. 

In sports such as athletics, traditional materials have been almost completely replaced by synthetic materials. Sports surfaces in modern indoor stadiums are usually made from a porous structure of rubber crumb and a binder such as polyurethane. Other polymeric materials used include flexible PVC or rubber sheet, polyolefins, polypropylene (PP) grasses, and foam laminates. 

Fabrics used in the automotive industry must meet exceptionally high requirements and be subjected to nonstandard tests that simulate the high-temperature and humidity conditions of light exposure [7]. Dyed fibers cannot meet these accelerated exposure specifications, which are met by specially stabilized, pigmented polypropylene fibers. The outdoor use of polypropylene fibers is expected to grow because of improved stabilizers. It has permitted grass-substitute products to be manufactured in a variety of forms. Many of them resemble carpets, which, until 1980, were used only indoors. 

Calcium carbide grass, artificial Polypropylene grease... 

Figure 15.8 A commercial microelectrode for pH measurements in volumes as small as 10 pL. The electrode has a solid-state pH sensor and a flexible polypropylene stem, making it extremely rugged and suitable for use In the field. This electrode can be used to determine pH In single droplets of water on leaves of plants or blades of grass to study acid rain deposition. (Courtesy of Lazar Research Laboratories, Inc., Los Angeles, CA, www.lazarlab.com.)...

Polypropylene is intrinsically less resistant to ultraviolet radiation. Although polypropylene shows powdering rather than grass surface grazing after sunlight exposure, minute surface cracks are visible under the microscope. Under certain conditions the microcracks can act as points of stress concentration. This can reduce the impact strength of the component. 

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