Engineering-grade

Polyethylene terephthalate (PET) an amorphous polymer is available in an engineering grade. It is extensively used in beverage bottles and films. 

Additives for the Modification of Poly(Ethylene Terephthalate) to Produce Engineering-Grade Polymers... 

Table 14.1 Additives used in engineering-grade PET to overcome specific shortcoming of the base resin...

Engineering-grade PET finds widespread use in numerous load-bearing applications, as demonstrated in Table 14.15. 

The principal commercial grades of engineering-grade PET are shown in Table 14.16. 

Table 14.16 Commercially available engineering-grade PET resins...

COMPOUNDING PRINCIPLES FOR PREPARING ENGINEERING-GRADE PET RESINS... 

Grades 1-D and 2-D are most commonly used in truck, railroad, and some stationary engines. Grade No. 4-D fuels are used in marine and certain industrial diesel applications. Fuel oil grades and their intended applications are outlined in TABLE 3-13. Federal diesel fuel oil classifications are provided in TABLE 3-14. 

Edward S. Wiard. E. M. Consulting Engineer. Grading, Sizing and Screening. Separation, Concentration,... 

Isoplast [Pfizer]. TM for an engineering-grade thermoplastic polyurethane for extrusion and injection molding. It is an impact-resistant glass based on methylenediphenyl isocyanate. 

DPNR. [H.A. Astlett] DeproteinizedNR engineering grades for off-shore and underwater use, brake pads, vibration mounts, pharmaceutical prods. 

Some companies, like Mann Organization in the UK, aim at matching not only at the type, but even an engineering grade performance. It has been found that engineering blends, from housings of the electronic equipment, are the most suitable for the total properties recovery. 

The use of plastics in the car industry has increased dramatically in recent years. This is the result of a number of factors the requirement for lighter and hence more fuel-efficient cars (itself the result of the energy crises of the last decade), the consumer demand for cars to be fitted with extra equipment, the constant up-grading of the decoration and appearance of cars, and the increasing use of engineering-grade plastics in substitution for metal parts. 

The process is used extensively for the production of yarns and fibres monofilaments and strapping for recycling of scrap polyesters in production of PET containers and soft-drink bottles engineering grades of PET and PBT for electrical, engineering and automotive applications. 

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