Thermoplastics perception

The penetration of thermoplastics in contemporary furniture remains limited by the perception that costs are prohibitive, and the difficulty of convincing both the profession and the... 

Since the plastics are produced from petrochemicals derived from hydrocarbons, the motivation to reuse, recycle, or reprocess for energy recovery is primarily driven by an interest in conservation of petroleum resources. Economic factors are also important, but the potential saving of landfill space is more a perception rather than a reality [9]. Most of the categories of vinylic polymers discussed in this chapter are melt-formable, that is, they are thermoplastic materials, rather than nonmelting or thermosetting as are several of the condensation polymers discussed in Chapters 20 and 21. Thus,... 

The permolecular structure of polymers exerts a perceptible effect on permeability. Thermoplasts whose structure is not spherulitic and materials with a coarse-spherulitic structure are highly permeable because of different development levels of the microcapillary system of permolecular formations. 

Electric conductivity exerts a perceptible effect on crumbling of both polymer and inhibitor particles in the fluidized bed. It should be underlined that electrostatic deposition of inhibitor powders, related mainly to semiconductors, differs a little from that of thermoplastics. In the case that the specific volume resistance is pv < 10 fl- m, there is a strong probability of crumbling of... 

Proceeding from the above, current generated in M1-P-M2 systems is able to ensure stable polarization of the friction pair. Polarization takes place when such materials as PA, PPl, PVC, polyolefines and some other thermoplastics are used as the lining material. The polarization sources may appear in seals containing polymer linings, in friction joints whose parts are covered by polymer coats, in reinforced polymer articles and so on. These sources may perceptibly affect friction and wear of metal parts operating in hostile media or found between facings in the electrical contact. 

The initial perception of PES as a high performance engineering thermoplastic suitable for continuous use under stress in air at elevated temperatures has been confirmed and the material now has an Underwriters Laboratories Temperature Index of 180°C this advance beyond the temperature capabilities of other engineering thermoplastics is indicated by FIG. 4... 

Parts with grained surfaces show a wide variety of applications. The automotive sector plays the most important role because of the large number of parts with structured surfaces [1, 2]. The main reason for using grained, often leather-like surfaces is to generate a perception of high quality and worthiness in the customers mind. In combination with soft-touch h tics, mostly created by using thermoplastic or polyurethane (PUR) foam layers, this perception is completed. 

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