Reinforced PPS

With the largest turnover, GMT is certainly the most important semi-product in the group of reinforced thermoplastics. A special production process for natural fiber-reinforced PP semi-products (NMT) has been de-... 

Extrusion press processing (express processing) was developed for the production of flax fiber-reinforced PP at the research center of Daimler Benz (Ulm, Germany) [62]. In this processing, natural fiber nonwovens and thermoplastic melt-films are alternatively deposited in a tempered molding tool and molded afterwards. The thermoplastic melt-films are laid on by a mobile extruder. If thi.s process is optimally adapted to the element, a single passage by the extruder suffices. The structural order consists of three layers two layers of... 

Spartech Polycom Filled HDPE Filled and Reinforced PP Filled TPO... 

Reinforced PP 10-40% Talc 10-40% Mineral 10-20% Glass Fibre 30-40% Glass Fibre ... 

Airbus A340-500/600 glass fibre reinforced PPS for 3-metre-long components, carbon fibre reinforced PPS and honeycomb for inboard lower access panels. 

The big underbody panel on the new 5 Series from BMW with variable stiffness and density values within the panel produces a weight saving of 30% compared with a similar glass-reinforced PP compression-moulded or injection-moulded part. 

Developments by BASF in high-impact propylene copolymers produced by reactive blending, random propylene copolymers, glass fibre-reinforced PP composites and PP foams are reported. Properties and applications of these materials are described. 4 refs. BASF AG... 

The damage process is accompanied by numerous microvoids, the development of which has been utilized for waterproof and/or breathable films. Other interesting segments are fibers, glass-fiber reinforced PP, thermo-formable grades and piping systems. 

Figure 10.14. The thickness of transcrystalline layer versus time at different melt temperatures in cellulose reinforced PP. [Adapted, by permission, from Gatenhom P, Hedenberg P, Karlsson J, Fehx J, Antec 96. Volume II. Conference proceedings, Indianapohs, 5th-10th May 1996, 2302-4.]...

Aqueous nitric and hydrochloric acids caused considerable reduction in tensile strength. Inorganic compounds are usually tested as aqueous solutions and it is very often the more dilute solutions which have the most deleterious effect upon glass-reinforced PPS. This is believed to be caused by the action of water, not the reagent, on the glass-resin interface. More will be said about this in the section on automotive uses. 

Figure 2. Exposure of 40% glass-reinforced PPS )o gasoline 1 % alcohol mixtures at 12l°C. Key lo alcohol , methanol and , ethanol.

Table IV. Weight and Thickness Changes of 40% Glass-reinforced PPS andUltem 2300 Polyetherimide on Exposure to Gasoline andGasoline/Alcohol at 121 °C...

Table V. Resistance Of 40% Glass-Reinforced PPS To SAE 30 Motor Oil at 180°C/4 Weeks...

Figure 4. Exposure of glass-reinforced PPS (U) and nylon (9) to used engine oil at I50°C.

Reinforced PPS exhibited excellent resistance to transmission fluids at 149 C (300F) for one year (Figure 5). 

Coolants. Underhood fluids also include water and antifreeze solutions. Physical properties of glass-reinforced plastics of all types deteriorate, sometimes drasticaFly, upon exposure to water at elevated temperatures. Bair and Miner of Bell Laboratories have recently studied the hydrolytic stability of PPS and glass-reinforced PPS using a calorimetric metnod (6)- The results which they obtained agree well with our data. (Figure 6)... 

Figure 5. Exposure of 40% glass-reinforced PPS to doi-3 brake fluid (closed bar) and type-f transmission fluids (open bar) at 149°C.

Figure 7. Exposure of 50% glass-reinforced PPS to water at 120°C (o) and engine coolant at 125°C (Ei).

Figure 8. Exposure of 40% glass-reinforced PPS fO) and a phenolic (o) to engine coolants at I25°C.

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