Computer and Business Equipment

CBEMA Computer and Business Equipment Manufacturers Association... 

The science and technology of polymer blends has now acquired an important position in the area of development of new polymeric materials. Moreover, the application of polymer blends has increased significantly and is expected to continue to grow. Of the total consumption of engineering polymers, more than 20 percent is currently thought to be composed of blends with important and various applications in the automotive, electrical and electronic industry, in computer and business equipment housings, in medical components, etc. Annually about 4900 patents related to polymer blends are published world-wide. 

PPE/PS Noryl/General Electric Improved processing, combination of heat resistance, excellent dimensional stability and toughness Computer and business equipment housings, automotive instrument panels, interior trim, connectors, electrical housings, medical components... 

Uses Molded goods sol n. cast or extruded film structural parts tube and piping prosthetic devices optical parts windows computer and business equip. household appliances compact disks paints automotive parts electrical lighting modifier for other polymers reinforcing modifier for recycled polymers and alloys in blends with ABS, polyarylene ether, PBT, PET industrial fibers safety helmets, goggles unbreakable glazings (lamp housings) films food contact and medical applies. in cellophane for food pkg. food-contact surfaces... 

In most situations, the manual identification and sorting of plastics parts from automobiles or computer and business equipment housings using fast infi ared techniques has significant throughput limitations. Overall ID and sorting rates of... 

Electrical components (connectors, housings, lighting components) Information technology Lighting Computer and business equipment UL, CE Relative thermal index (RTI) Glow wire temperature... 

IBM has been coding plastic components to promote their recyclability since 1992, when it became the first computer manufacturer to do so. Computer and business equipment companies are also increasing their use of recycled-content resins in production. For example, Kobe Steel Ltd., announced in 1998 that it had developed a practical sandwich technique for applying virgin resin to a core of recovered plastic, which allows increased use of recycled resin. They plan to market the technology to manufacturers of office machines, home electronics, and toiletries. The Japanese unit of IBM is manufacturing some personal computers with about 20% recycled plastic from older IBM PCs. ... 

The versatility of modified PPE resins has resulted in an extensive variety of applications which include automotive interior, exterior, and under-the-hood applications computer and business equipment electrical and electronic devices health care building and construction telecommunications appliances water handling equipment and microwavable food packaging. Noryl modified PPE resins have become the world s most successful and best-known polymer blends and alloys. 

Flame-retardant (unfilled) grades. These use a nonbrominated, nonchlori-nated flame retardant, allowing for ECO-label compliance. They offer a range of thermal and mechanical properties and cost economy for apph-cations including computers and business equipment, electrical, electronic, construction, telecommunications, and appliances. Representative properties of flame-retardant PPE/PS grades appear in Table 9.3. Flame-retardant grades and key features include... 

Flame retardant (FR) PC/ABS blends constitute a very important class of thermoplastics because of their unique combination of properties provided by constituent polymers. Styrene acrylonitrile copolymer (SAN) matrix in ABS has a favorable interaction with PC allowing for a compatible blend to be commercially widely used without a compatibilizer [1]. These advantages make them an ideal choice for many computer and business equipment housings. They are also used to mold medical housings such as Automated External Defibrillators (AED), Blood... 

Flame-retardant polystyrene is used primarily in expanded foam for building insulation. Rubber-modified styrenic polymers are flame retarded for use in a number of applications, such as enclosures for electronics and business equipment. By far the largest volume flame-retardant HIPS application is television enclosures (Figure 29.1) these are made primarily from flame-retardant HIPS [3]. Flame-retardant HIPS has an attractive balance of mechanical properties, processability and cost. Flame-retardant styrenic blends such as HIPS-PPO and PC-ABS also find utility in a number of electrical applications such as printers, computers and monitors. These blends have received increasing attention recently because of their ability to be flame retarded with nonhalogen flame retardants (see Section 7). 

Air classification is indispensable in a plastics recycling operation that takes in complex plastic-rich parts from end-of-life durables such as automobiles, computers, televisions, business equipment, and small household appliances [8, 10, 49, 73]. Air classification process steps can also be staged to drop out various materials depending on particle size, shape, and buoyancy. Some advantages and disadvantages of air classification processing are shown next ... 

PVC can be blended with other polymers to produce injection-molding compounds. Properties that make these blends suitable for appliance and business equipment housings such as computer monitors and keyboards include good impact strength, heat resistance, flame retardancy, and chemical and solvent resistance. 

Databases and records might include contracts list of customers list of employees payroll records operating procedures written emergency management and business continuity plan, including a list of recovery personnel proof of ownership of all property, equipment, and products tax records list of computer and communication equipment at facility list of computer software and programs insurance information and facility map. Typically, vital records are those that are irreplaceable and necessary to restore critical functions.)... 

Constraints in optimization arise because a process must describe the physical bounds on the variables, empirical relations, and physical laws that apply to a specific problem, as mentioned in Section 1.4. How to develop models that take into account these constraints is the main focus of this chapter. Mathematical models are employed in all areas of science, engineering, and business to solve problems, design equipment, interpret data, and communicate information. Eykhoff (1974) defined a mathematical model as a representation of the essential aspects of an existing system (or a system to be constructed) which presents knowledge of that system in a usable form. For the purpose of optimization, we shall be concerned with developing quantitative expressions that will enable us to use mathematics and computer calculations to extract useful information. To optimize a process models may need to be developed for the objective function/, equality constraints g, and inequality constraints h. 

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