Glass fiber reinforced thermoplastics

Figure 15.1 Glass-fiber-reinforced thermoplastic polyesters applications (numbers represent percentages) [1]...

Sato N., Kurauchi T., and Kamigaito O. (1985). In situ SEM observation of fracture in short glass fiber reinforced thermoplastic composites. In Fracture Mechanics Sixteenth Symposium, ASTM STP 868 (M.F. Kanninen and A.T. Hopper, eds.), ASTM, Philadelphia, PA, pp. 493-503. 

Fig. 11.24 The effects of the fiber aspect ratio, at constant 30% wt loading, on glass-filled polyamide-6. [Reprinted by permission from H. M. Latin, Orientation Effects and Rheology of Short Glass Fiber-reinforced Thermoplastics, Colloid Polym. Sci., 267, 257 (1984).]...

H. M. Laun, Orientation Effects and Rheology of Short Glass Fiber-reinforced Thermoplastics, Colloid Polym. Sci., 262, 257-269 (1984). 

The process of injection molding (IM) is used principally for processing unreinforced or glass fiber reinforced thermoplastics (TPs) and thermosets (TSs) (Figure 4.1). Up to at least 90wt% of all plastics processed are TPs. There are many different types or designs of IM machines (IMMs) that permit molding many different products based on factors such as quantities, sizes (such as auto bumpers to medical micro products), shapes (simple to complex), product performances, and/or economics.1,150>157,173 176 476... 

Carling and Williams [24], working with a variety of glass fiber reinforced thermoplastics using CT specimens of different sizes (50 x 50 mm, 100 x 100 mm) and a SENB specimen of 20 x 100 mm, showed that /-integral tests work well with these materials. The value of 7c was reasonably independent of specimen type and size. The. specimens, thick-... 

Both ciystal forms of titania, rutile and anatase, have a high Mohs hardness rating and are abrasive. For example, the pigment particles can etch glass fibers and greatly reduce the tensile strength of glass fiber reinforced thermoplastic blends and alloys. 

For TPs, improved chopped strand glass fiber grades for reinforcement of nylon and TP polyester (PET) are from PPG Industries, in response to the increasing use of glass fiber-reinforced thermoplastic RPs, in automotive components especially. They include ... 

Figure 5.54 Processing sequence for compression stamping glass fiber reinforced thermoplastic sheets...

Table 8-1 compares PUR-RIM and injection molding of unreinforced and glass fiber reinforced thermoplastics, in the production of parts with large surface areas. RIM also is comparable to resin transfer molding (RTM ... 

Mold Wear. This is a distinct problem, especially in glass-fiber-reinforced thermoplastics. Compounders often claim that their proprietary coupling agents reduce mold wear, but molders remain rather skeptical. 

Celstran Long glass fiber-reinforced thermoplastics, viz., POM, PBT, PET, PA, etc. Hoechst Celanese Corp. 

Crowson, R.J. and Folkes, M.J. (1980) Rheology of short glass fiber-reinforced thermoplastics and its application to injection molding. II. The effect of material parameters. Pdym. Eng. Sd.. 20 (14), 934-940. 

Another interesting long glass fiber-reinforced thermoplastic BMC operation was developed by Composite Products, Inc. (219,220). Basically it is an on-site extrusion and molding operation. The long glass fibers, up to 50 mm long, are fed downstream into the extruder. The compound exits the open die as a log and is stationed in the accumulator until compression molded. Thermoplastic SMC process has been recently patented by ThermoComp (221). 

JP Greene, JO Wilkes. Numerical analysis of injection molding of glass fiber reinforced thermoplastics. Part 1. Injection pressures and flow. Polymer Eng Sci 37 590-602, 1997. 

K Stade. Techniques for compounding glass fiber-reinforced thermoplastics. Polymer Eng Sci 17 50-57, 1977. 

LW Glenn, HC Kim, DE Miller, CS EUis. Toughness of Long Glass Fiber Reinforced Thermoplastics. ANTEC, SPE, Toronto, 1997, pp 2325-2329. 

Glass-fiber-reinforced thermoplastic Thermoplastic polyester 20 to 35 1.3... 

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