Compression molding description

The final product may take any one of a vast multitude of final forms. These include, but are not limited to, construction materials, toys, automotive parts, kitchen aids, industrial parts, sports and recreational equipment, containers of all sizes and description, and an unlimited variety of packaging products for foods, drugs, cosmetics, and other consumer products. The processes that are used to produce or mold or fabricate the final products are also varied and depend on the design and purpose of the product. Some of these processes include extrusion, compression molding, roto-molding, blow molding, sheeting, and films. 

The following section will give a detailed description of a continuous compression molding process using a pressing unit which is equipped with one continuous tool. 

The four compression molding techniques are briefly described. It should be remembered that these techniques have been used almost universally with continuous or long glass fiber reinforcements and not with short fiberglass-filled materials. Therefore, only a brief description of the processes will be given here. The interested reader is referred to the bibliography for specific processing parameters. 

The polymers were melt blended first and then Cloisite 15A was added at a 5 wt.% loading in the polymer. The equipment was described as an internal mixer. No additional information was provided as to the manufacturer or the physical description of the mixer. The mixing conditions were 100°C at 80 r/min for 20 min. No additional processing information was provided. The test samples were compression molded at 100°C for 1 min. The pressure was not provided. The samples were characterized by WAXS. No TEM pictures were provided. Hence, no information was provided to determine the montmorillonite orientation in relation to the direction of stress for the modulus evaluations. 

A superior strategy to the above approach is provided by Cui and Paul [18]. The quality of this work is enhanced by the full description of the polymers that were utilized and the complete characterization of the composites that were prepared. The PP that was employed in this study was Pro-Fax PH020 manufactured by Basell. MAPP (PP-g-MA) was PB3200 provided by Cromption with a MA content of 1.0 wt.%. The diamine and montmorillonite (Cloisite Na) were identical to the ones utilized in the above study. Cloisite 20A was utilized as a control organomontmorillonite. This is a superior choice to the organomontmorillonite employed in the studies above. The composites were prepared with a DSM Micro 5 compounder. The test samples were prepared with a DSM microinjection molder. This is a superior protocol in relation to the compression-molded test samples prepared above. PP-g-MA was reacted directly with the diamine in a Brabender at 195°C and 50 r/min for 5.5 min. The amine... 

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