Playground equipment

Even if the market for tire playgrounds were developed completely, it would require less than a million tires per year, which is less than one-half percent of the annual generation. 

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Henningsson, B. and Carlsson, B. (1984). Leaching of copper, chrome and srsenic from preservative-treated timber in playground equipment. International Research Group on Wood Preservation, Doc. No. IRGAVP 3149. 

Table 10.3 summarizes the uses of propylene oxide. Propylene glycol is made by hydrolysis of propylene oxide. The student should develop the mechanism for this reaction, which is similar to the ethylene oxide to ethylene glycol conversion (Chapter 9, Section 8). Propylene glycol is a monomer in the manufacture of unsaturated polyester resins, which are used for boat and automobile bodies, bowling balls, and playground equipment. 

Examples of products fireplaces, vanities, plaques, shower stalls, playground equipment, bowling balls, sewer pipe, pistol grips, corrosion resistant tanks... 

Another type of plastic recycling doesn t involve a phase change at all. Instead, plastics are chopped into small pieces and pasted back together in new forms. Such plastic lumber can be used to construct park benches, porches, and playground equipment. 

Making products such as reefs, playground equipment, floor mats, gaskets, etc., out of scrap whole or processed scrap tires is primarily limited by the high cost of tires compared with other raw materials. However, there are also some noneconomic barriers. Reefs made of tires, for example, are not appropriate for the rough shores of the northwest. Playground equipment made of wood or other products is often preferred for aesthetic reasons. 

Whole waste tires can be used for artificial reefs, breakwaters, erosion control, playground equipment, and highway crash barriers. 

Playground equipment - High cost compared to other materials... 

Artificial reefs and breakwaters Playground equipment Erosion control Highway crash barriers... 

Two other samples yielded small quantities of arsenic. The eighth sample, which yielded the greatest amount of arsenic, was rough-sawn lumber, a material classified by the wood-treatment industiy as not acceptable for playground equipment. The CPSC concluded that the amounts of arsenic that people may be exposed to are below the level that may cause a health concern, and deemed it safe. 

At this year s fundraiser for new playground equipment, Mayor Mayfield had whipped cream pies tossed at her face. One chance to toss a pie cost 2.75. While Mayor Mayfield was in the pie-tossing booth, 242 was raised. How many pies were tossed at her ... 

Figure 22.14 Low density polyethylene (LDPE) is made from gaseous ethene under high pressure in the presence of a catalyst. LDPE is used for playground equipment because it is easy to mold into various shapes, it is easy to dye into many colors, and it is durable. 

Products and Uses Frequently used on telephone poles, pilings, fences, railroad ties, landscape timbers, playground equipment, outdoor wood products, outdoor furniture, in wood varnish, stain, and sealant. Also added to laundry spray starch. 

Colorants can make relatively cheap commodity materials such as POs appear to be (superficially at least) more than just the sum of their parts. POs have relied on their colorability to make products more aesthetically pleasing to use, or simply to draw more visual attention toward a product. Product differentiation is perhaps the main reason POs are colored, whether for short-lived packaging or for color-matched, durable, multi-material assemblies such as automobiles and playground equipment. 

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