Poly electrical appliances

Poly(phenylene sulfide) (PPS Ryton) is a solvent-resistant plastic that is useful in high-temperature service (structure 4.71). PPS is used for pumps, sleeve bearing, cookware, quartz halogen lamp parts, and electrical appliance housings. 

Poly(ester-imide) resins have excellent thermal and mechanical properties, and wire enamels made from them are used in stressed electrical appliances. Other uses for imide modified polyesters are also known, where a balance between two thermal properties, cut through and soldering temperature, is required, e.g., in solderable poly(ester-imide)s and poly(ester-imide)s used in polyurethane wire enamels. A third application is in selfbonding wire enamels, where a softening of the film in a given temperature range is desired. 

It is instructive to consider the sources of plastics waste. Table 10.1 shows the proportion of waste for individual polymers, while Table 10.2 shows the proportion of waste classified by end use. Table 10.1 shows the extent to which polymers are discarded each year. Significant quantities of the high-tonnage polymers, notably poly(etiiylene), are simply used once and then thrown away. Table 10.2 gives data that demonstrate that packaging is the principal offender. Applications such as furniture and electrical appliances show more acceptable use of polymers. Discard rates for these applications are fairly low and lifetimes of the products are generally long. 

Since poly(phenylene ether)-based resins have a lightweight and are excellent in impact resistance as compared with metal or glass, the resins have been employed in a variety of fields including automobile parts, household electric appliance parts, and office automation equipment parts. However, polyCphenylene ether) resins have a bad moldabiUty. Therefore, the resins... 

Poly(L-lactic acid) is an effective alternative to petro-based polymers in applications such as packaging material, automotive materials, including floor mats and spare tire covers, and the chassis of electrical appliances such as computers, mobile phones, remote controls, and optical disks [422,423]. Figure 8.26 shows the commodity applications of PLLA. For... 

The important features of rigidity and transparency make the material competitive with polystyrene, cellulose acetate and poly(methyl methacrylate) for a number of applications. In general the copolymer is cheaper than poly(methyl methacrylate) and cellulose acetate, tougher than poly(methyl methacrylate) and polystyrene and superior in chemical and most physical properties to polystyrene and cellulose acetate. It does not have such a high transparency or such food weathering properties as poly(methyl methacrylate). As a result of these considerations the styrene-acrylonitrile copolymers have found applications for dials, knobs and covers for domestic appliances, electrical equipment and car equipment, for picnic ware and housewares, and a number of other industrial and domestic applications with requirements somewhat more stringent than can be met by polystyrene. 

Poly(butylene terephthalate) (PBT) (1) resins are semicrystalline thermoplastics used in a wide variety of applications, most commonly in durable goods that are formed by injection molding. Applications include electronic and communications equipment, computers, televisions, kitchen and household appliances, industrial equipment, lighting systems, gardening and agricultural equipment, pumps, medical devices, food handling systems, handles, power and hand tools, bobbins and spindles, and automotive parts in both under-the-hood and exterior applications. Additionally, PBT is very widely used to form electrical connectors. PBT, through its many blended products, can be tailored to suit numerous applications. 

Automotive appbcations account for about 116,000 t of woddwide consumption annually, with appbcations for various components including headlamp assembhes, interior instrument panels, bumpers, etc. Many automotive appbcations use blends of polycarbonate with acrylonitrile—butadiene—styrene (ABS) or with poly(butylene terephthalate) (PBT) (see Acrylonitrile polymers). Both large and small appliances also account for large markets for polycarbonate. Consumption is about 54,000 t annually. Polycarbonate is attractive to use in light appliances, including houseware items and power tools, because of its heat resistance and good electrical properties, combined with superior impact resistance. 

Glass-filled, toughened poly(ethylene terephthalate) (PET) resins can be readily moulded into highly impact-resistant structural parts for appliances and automotive components. The PET-based compounds are also suitable for construction (e.g. as structural members), equipment housings (e.g. printer and copier parts), agricultural applications (e.g. mower and tractor engine covers), materials handling (e.g. pallets and ttays), furniture (e.g. office chair bases), as well as electrical and electronic applications. 

MAJOR APPLICATIONS Poly(methylene oxide) resin has been widely used in mechanical, automotive, plumbing, appliance, industrial, and electrical conponents along with its copolymer resins. It is continuing to replace die-cast zinc, brass, aluminum, steel, and other metals in the various end-use industries. 

Acrylate polymers are often used in many applications that require good optical properties. However, they are unsuitable for use in the automotive industry because of their brittle characteristics. Thus, when natural rubber is blended with poly(methyl methacrylate), there is a big improvement in the elasticity of the brittle acrylate polymers. It is of interest that thermoplastic natural rubbers are relatively new products in the rubber industry and are fastgrowing items in the polymer market. The acrylate polymers blended with natural rubber can improve various properties of both the natural rubber and the acrylate polymers such as elasticity, adhesion, processability properties, and transparency. These materials are known for their excellent processability, characteristic of acrylate polymers, and their elasticity property provided by natural rubber, thus they exhibit the typical properties of elastomeric materials and can be processed with thermoplastic processing equipment used to prepare acrylate polymers. Many of their interesting properties have been widely developed for several industrial applications such as in the automotive industry, household appliances, medical devices, electrical cables, and headphone cables. ... 

A wide spectrum of properties maybe obtained by varying the ratios of thermoplastics, polyester, and styrene in the blend. Among the thermoplastics quoted in the literature for such blending are poly (methyl methacrylate), polystyrene, PVC, and polyethylene. High-gloss DMCs using low-shrink resins have found uses in kitchen appliances such as toaster end plates, steam iron bases, and casings for electric heaters. 

The high strength, stiffness and heat distortion temperature of poly(phenylene oxide)/polystyrene alloy is improved by reinforcement with mica or wollastonite. These alloys are used in appliances, and in electrical and electronic products. 

Poly(butylene terephthalate) is used as an engineering material in a variety of applications which include automotive parts, electrical components and domestic appliance assemblies. 

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