Long fiber injection

Long fiber injection (LEI) of PUR, developed by the German companies KraussMaffei (machinery) and Elastogran (processing) the fiber is introduced inside the mixing head... 

For door panels structural RIM molding is used, and fiber reinforced polyurethane interior materials use long fiber injection technologies or compression molding processes. A trend to eliminate PVC in interior panels... 

The functions and property characteristics of a product will be largely determined by the performance requirements and material selected for fabrication. The basic requirement of the process is its capability of handling a suitable material. For example, if a major function requirement is for resistance to creep under high loads, it is probable that a long-fiber RP will be necessary. Thus it would immediately eliminate such processes as blow molding and conventional injection molding. 

Fig. 11.30 Effect of preheating 50% by weight E-glass fiber-filled polyamide pulltruded pellets on fiber lengths at the screw tip of a 300-ton 23.86-oz reciprocating injection molding machine. [Reprinted by permission from C. G. Gogos, C. K. Yoon, and J. Brizzolara, Injection Molding Process Development for Long Fiber Reinforced Thermoplastics, SPE ANTEC Tech. Papers, 40, 384 (1994).]...

C. G. Gogos, C. K. Yoon, and J. Brizzolara, Injection Molding Process Development for Long Fiber Reinforced Thermoplastics, SPE ANTEC Tech. Papers, 40, 384 (1994). 

Problem 6.10 To make automobile panels, you inject a polymer melt filled with lO-ju-m-long fibers into a mold with a thin gap. The melt flows along the long direction x of the mold the thin direction is y. In what direction do you expect the fibers to orient ... 

LFP long-fiber prepreg LPIM low-pressure injection molding... 

The extruder takes in continuous glass roving and cuts it while wetting it with already molten resin. As compared with conventional injection molding of long fiber pellets, this process saves one heat history on the... 

In the long fiber RP markets applying Pushtrusion to profile extrusion, as in injection molding requires only a little modification. Technically,... 

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