Extruders types

D) D. Perfumo (of Bombrini-Parodi-Delfino S.p.A.), ItalP 696714 (1965) CA 65, 16784 (1966) [In the manuf of solid rocket proplnts of the extruded type, the action of plasticizers on the primary proplnt is accelerated by the addn of small amts of N-alkylformamides (such as HCONMe2). Processing temps can be low and primary plasticizers (such as alkylphthalates)... 

Extruded Model System. For this investigation, 100 parts zein, 40 parts corn amylopectin and 5 parts corn oil were blended thoroughly, and water was added at 307. of the total dry weight. Volatiles collected from extruded samples of this model system were compared to volatiles from the same system heated in an oven for 30 minutes at 120°C or 180°C and to volatiles from extruded samples of zein with 30% added water. The extruded samples were prepared on a C. W. Brabender single-screw extruder, type 2003, with a barrel diameter of 1.9 cm and an L/D ratio of 20 1. The first heating zone of the barrel was held at 60°C, and the second was set at either 120°C or 165°C. The die diameter was 6.5 cm. 

The stability of the emulsions further permits them to be compounded in simple liquid-blending vessels by means of agitators, eg, marine-type propellers, paddles, or turbines. The adhesives can be adapted to any type of machine application, ie, from spray guns to rollers to extruder-type devices. Different applicators are fairly specific in their viscosity requirements, as are the various substrates receiving the adhesive. 

Catalyst Evaluation. Commercial nickel-molybdenum (Ni-Mo) and nickel-tungsten (Ni-W) catalysts were evaluated with this feedstock. The Ni-Mo catalyst was HDS-3A from American Cyanamid and the Ni-W catalyst was Ketjenfine HC-5 from Armak Company. Both were extrudate types supported on alumina and silica-alumina, respectively. The run conditions for the Ni-W evaluation run are shown in Table VII for selected samples. Pressure, liquid feed rate, and hydrogen feed rates were held as nearly constant as possible only the temperature was changed. 

This section describes fluid mixing technology and is referred to in other sections in this handbook which discuss the use of fluid mixing equipment in their various operating disciplines. This section does not describe paste and dough mixing, which may require planetary and extruder-type mixers, nor the area of dry solid-solid mixing. 

Consideration should be given to the availability of small-scale equipment, which is vital for development work prior to scale-up on pilot- or production-scale machines. Equipment choice is not necessarily based on maximum throughput rate, since the subsequent processing stages (e.g., cutting, spheronization, and drying) are batch processes and are therefore, a rate-limiting factor in production. Since extrusion is a continuous process, it allows adequate production rates for most purposes with any of the above mentioned extruder types. 

Figure 4.5 shows a screenshot of TRAMP. The three columns of buttons on the right were generated from the domain models. They represent three different dimensions of characterizations. The left column contains a list of relevant goals (tertiary effects) to be achieved, whereas the other columns refer to the domain categories of materials and extruder types. 

Instead of navigating through the concepts and relationships to determine the data for transfer, an older view (possibly from a different project) can also be searched for in the experience base. The related information - the type of project, the cooperation partner, the extruder type and its realization - are used to graphically formulate a search query. This query is then executed on the experience base. 

EP-g-MA (1.1% MA) (0-20) TEM / titration of residual amine groups / effects of extruder type, and PA mol. wt. and amine end-group concentration on morphology, mechanical properties and ductile-brittle transition temperature / effects of di- vs. mono-functional PA Oshinski et al., 1996 a, b, c, d... 

Bulk molding compounds (BMC) are mixtures usually of short glass fibers, plastic, and additives similar to the SMC compotmd. This dough mixture, with the consistency of modeling clay, can be produced in bulk form or extruded in rope-like form for easy handling. The extrudate type is called a log that is cut to specific lengths such as 0.3 m (1 ft). 

Stage including cage reactors, rotating disk reactors, wiped film reactors and extruder type reactors. 

The residence time distribution of a screw extruder is basically sharp (Figure 6.25) [125]. Depending on extruder type and screw design, the distribution can be controlled depending on the longitudinal mixing. 

Flatting pigment n. Any finely divided particle added to a paint formulation in order to decrease the gloss of the dried film. It may be an extruder-type (low refractive index) or a hiding pigment, and it is... 

The mixing action is by means of two Z-shaped contrarotating blades. When complete (45-60 min) the dough is discharged by extruder-type screw located below the mixing chamber proper. The dough discharges as a thick log. Once mixed the DMC has a shelf-life of up to 7 days. It is usually used in 24 h. 

Although extrusion is by far the most common processing method for WPC, the processors use a variety of extruder types and processing strategies [89]. Some processors run compounded pellets through single-screw extruders to form the final shape, others compound and extrude final shapes in one step using twin-screw extruders. 

Nylons Molded, Extruded Type 6 General purpose 1.12—1.14... 

Polyethylenes Molded, Extruded Type I—lower density (0.910—0.925) Melt index 0.3—3.6 Melt index 6—26 Melt index 200 0.910 0.925 0.918 0.925 0.91... 

Polyethylenes Molded, Extruded Type I—lower density (0.910— 0.925) ... 

---