05-28-1991 Council Packet - Laserfiche WebLink

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.-4 Fabrics XpnifilfcplMtiCrtJJjW in th« past as landscape sneeiin*. **«Vjif^jjyi^^|.‘j^*f»^'jfa»MpdWhi8h molecular weight formed by combining two . Tf CO form larger ones. Various synthetic fabrics are br«4wmbination of polymers. Some of the more common polypropylene. of propylene, a petroleum deri\'aUve, that is the lahrig material in the manufacture of geotextiles. ability of a fabric to withstand penetration by a apf^ “d pressure. riii*'•'"fl the fibers in a non-wovcn fabric by •. AHhi^ve to the web causing the fibers to adhere to each ' engineering fabric made by a continuous process from ' tff’flw All spunbond fabrics are made of an unbroken >i ttriftf ^ fihSf|l mndomly spun to form the fabric web. Spunbond processes <1*^^ alfliinjlaruntti-thepoint of final bonding when the web is bonded by we*iw or needle punching methods. -***'-1^* abilln* of a geotextile to mold Itself readily to if itt^laiH Tf a fahnc not hnve COOd SUbStiatCaucibM.iipoii.wliilch it is^laid.. If a fabric does not have good substrate *•» lyfan^ito^ gaps and Irregularities creating weak, un- ran fall when subsequent layers are added on top of ^tiUliy'ta withstand stress and tension from ell dircc-» * sMl'VtMMw/ ■ kV vv amj»aaaai* •• w... ^— 7*tloaif irithOtt6kK»l^ integrity. A good geotcxtile should retain '^'IttifniilbanQ^ iri*Vatying extremes of environment, such as ultnniolet V**4Bpflwf*.'^4iPPf-Changes, fuel spills and chemical applications. tiwwgtl»« The force required to begin or continue a tear '.Jfl^Vftbric j^co'tt is jmnetured or tom. ability to resist detenorarion and loss of struc- * .tural Inte^^ arid atiength when exposed to the damaging ultraviolet rays 'I^ilhrtlmwi^llaw (nonuapermeabiUty): The ability* of a fabric to per- • lojft'ttta pg^ajn irf TTir* through Uie fabtic perpendicular to Its plane. Those fabrics having a t’wo-directional orientation of fibers «i ^nuttiilli ptlf^*^*****" to each other. Woven fabrics have their strength run- ’»)iiii|g In JUft thMS two directions at right angles to each other and not „p'ariwadll are manufactured by a weaving process, usually on • %%-._ ' ■ ^ -/* 1 • • Bourn ^tlSUoldt^IHtWdor^’.Co.; and Charlie Dillon, Turf Irrigation * f ; . ^av**'-*.* I Blunk, Blunk's IVholesale Supply Construction; Jeff Sunderman, '•*SuilifiM!fvdOidittw invaluable knowledge and assistance »t^ismCi^coui4 hot have been written. ----------------------------------------------------------------- ------- .A gam Uio .non -wovens generally ?eem in be supenor in both departments A higli coefficient of friction is impor tant to prevent the fabnc from moving once it is installed and to keep the ac- gregate from shifting or blowing away. Caution must be taken here not to get a fabric that is either too slick or too fuz- ;y. The slick fabrics are usually heat bonded and have a very low coefficient of fnclion. Although the fuzzy fabnes tend to create more of the desired fric tion they also tend to retain water with in the fabric and often form an attrac tive bed for weed seed germination. Ibmperature and chemical sublllty arc factors to be considered, among others, for life span potential. I^inal considerations, but nowhere X' near the least important, are availability, price and dealer knowledge and support. Most geotextiles are readi ly available but they can vary tremen dously in price and physical properties. For purposes of evaluation in Ibble I. we compared the most expensive prices you would pay for each product if pur chasing a minimum order Although the initial cost of georextUes is considerably higher by percentage than that of poly ethylene, the actual dollar cos: is not prohibitive. This initial investment is more than overcome by the many long term benefits inherant in the use of these fabrics. It became quite apparent when researching this article that, as in all businesses, there is a great gap in the knowledge and support capabiUUes of the various manufacturers and distribu tors, although all were quite cooperative and willing. A saxy buyer will also shop for expertise when examining fabric capabilities. It was not Colorado Green’a intent to reach specific conclusions here, but to present enou^ background and data for you to make your own determina tions. All things considered, these geotextiles are excellent products from which to choose and have outstanding potential for use within the Green In dustry. Polyethylene film never really did the Job expected of it as a weed growth inhibitor and along the way con tributed to the demise of much more plant material than we are willing to ad mit. At best, it was a stop gap until the time that a better solution came along. That time is now. 1110 geotextiles are here. Goodbye polyctheylene. ^ V I 11’fn •.« tf f Colorado Green • Fall 1986 • 11 iM ■. i *