Wool carpets

Although stain-blocking treatments were originally developed for nylon, there has been a good deal of emphasis over the last decade on extending their use to wool carpets [511-515]. Whilst syntans similar to those used on nylon are also suitable for wool, larger amounts are required to block the greater number of dye sites in wool [512]. 

Painted (flat latex) wallboard Cotton / polyester bedspread Masonite Brick (used) Wool carpet Cement block Wallboard... 

FC finishes alone do not sufficiently prevent coffee, tea and other foodstuffs from dyeing nylon and wool carpets with coloured spots, especially when these liquids are not quickly removed. Stain blocking for these carpets is achieved by the combination of FC products with syntans. The latter are also used for wet fasmess improvement of acid dyed nylon (see Chapter 13). Stain repellency is promoted by hydrophobic finishes, mostly fluorocarbons, but with decreasing costs also by... 

Wool is one of the best materials for carpets. It is hard-wearing and naturally flame-resistant. Although wool carpets tend to be more expensive, if properly cared for, they can last for 50 years or more. Use cork or wool for the underlay. Recycled underlays made from old car tires, fiber scraps, or compressed wood fibers are also available. 

For permethrin, high values in dust may either be due to use by the occupant, commercial pest control or the impregnation of carpets or textiles. An impregnation of wool carpets with permethrin may cause concentrations in household dust of the same order of magnitude, up to some hundred mg/kg. As permethrin is replacing other insecticides such as lindane for many applications, an increase of concentrations of this substance in dust is being observed (Friedrich et ah, 1998). 

Petersen and Solberg (2004) Wool carpet Post-farm gate to use GWP... 

Basset-Mens, C., Rankin, D.A., Boyes, M., Ledgard, S., 2007. Life Cycle Assessment of New Zealand Wool Carpet — Preliminary Study. Report by AgResearch, Hamilton, New Zealand. 

McNeil, S.J., Sunderland, M.R., Zaitseva, L.I., 2007. Closed-loop wool carpet recycling. Resources Conservation and Recycling 51, 220—224. 

There are many reports of environmental impacts arising from wool processing. One of the more significant is pesticide residues that are released into the wool processing wastewater during wool processing [49-51]. Wimbush reports that pentachlorophenol was found at a level as high as 100 ppm in consumer products on wool carpets, as shown in Table 7.22 [52]. 

Wimbush, J. M. 1989. Pentachlorophenol in wool carpets—investigating the source of contamination. International Wool Secretariat (IWS) Development Center Monograph, IWS, West Yorkshire, England. 

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