Plastics exterior components

Typical applications of nylon-based plastics also include fasteners for interior and exterior components, a host of coimectors, holding fixtures (Figure 17), and radiator end caps. These applications rely on the ductility and toughness of impact-modified nylon 6,6 as a mechanism to cormect assemblies or to attach components together. 

The combination of a double-layer deposit of nickel and either micro-cracked or micro-porous chromium provides the very best system of protection available by these means. Plastics components intended for particularly demanding applications (including exterior trim on the most expensive cars), are finished to such specifications. 

In high-pressure agglomeration, another interlocking mechanism may occur if a mixture of rigid and plastic materials is compacted. In this situation, the plastic component flows into recesses and, more generally, envelopes the exterior structure of harder particles, thus producing a strong structural bond that resembles the effect of a matrix binder (see also Section 8.1). 

There has been a trend in recent years to move towards the electrostatic deposition of paints for exterior automotive applications. Reasons for this include improved paint transfer efficiency. Normally, plastic parts need to be painted with a conductive primer prior to the electrostatic painting of base and clear coats. One of the most recent developments in the area of external automotive applications is that of intrinsically conductive resins for electrostatic painting. Currently there are commercial applications for body panels that utilize PPE/PA that contains carbon black as the conductive component. In the USA, a mirror shell application uses PPE/PA where the conductivity is achieved through the incorporation of graphite nano-tubes. 

Because of the Kmitation of temperature resistance, the use of plastic components in ovens has been mostly limited to exterior trim. Plastics however are gradually being used for semi-structural components. Endcaps with a metallic finish are a typical example. General Electric have used a sputter-coated modified Noryl polyphenylene oxide for a shiny metallic appearance for the Tappan oven. The material provides flame resistance, electrical insulation, and resistance to heat, grease, and abrasion. 

In present-day high-speed assembly line operations, adhesives are applied robotically. The adhesive bead is apphed quickly and evenly to parts on a conveyor line just prior to being fitted. These operations, especially the need to handle the adhered substrates soon after assembly, demand fast-curing adhesive systems [65]. Two-component adhesives are used to bond metals to plastics in automobiles, to laminate panels in the construction industry, to laminate foams to textiles, to laminate plastic films together, and to bond poly(vinyhdene chloride) films to wood for furniture. A commercial waterborne two-component adhesive is sold by Ashland under the trademark ISOSET. This system is used for exterior sandwich panels by recreational vehicle manufacturers and is composed of a water-emulsiliable isocyanate and a hydroxy-functionalized emulsion latex. 

The external case of the rocket motor supports the mechanically and thermally induced stresses, which are due to internal gas pressure, vibration, acceleration, thrust vector control, and differential thermal expansion of component materials. To accommodate these factors, the structural material should have high strength, adequate modulus, and resistance to buckling. Either a continuous glass filament wound epoxy plastic or a high temperature metal (steel, titanium, or aluminum) case serves as the exterior structural member. 

Recyclability and sustainability All PO-based plastic interior or exterior part systems, theoretically at least, allow potentially easier recovery and reuse of components or shredder "fluff" when a vehicle s lifetime is over. Reduced environmental footprints are also being sought with the use of plant-based fillers and fibers for plastics. 

Uses Acrylic for wood coatings (furniture, kitchen cabinets, wood components), metal coatings (automotive OEM, refinishing, components, transportation), plastic coatings (general industrial, business machines) Features Exc. adhesion to ABS, PC, PPO good household stain, chem., and UV resist., exterior durability, gloss NeoCryl B-817 [NeoResins]... 

Although few automobiles contain exterior body panels made of plastics, a number of components are plastic. Examples include bumpers, trim, light lenses, grilles, dashboards, seat covers, and steering wheels—enough plastics to account for an average of 250 lb per car. The increased emphasis on... 

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