Patents with Abstracts
Patents with Abstracts
U.S. Patent 8,557,160 (October 15, 2013), “Direct Forming of Non-Textile Fabric Elements from Plastic Pellets,” Gregory W. O'Connor, and James S. Gregg (Samsonite IP Holdings S.a.r.l., Luxembourg, Luxemborg).
Traditional plastic forming such as injection molding, blow molding, and extrusion involves melting and shaping the melt, requiring complex equipment and precise control. Forming processes can be simplified by solid phase forming using ultra high molecular weight polymers. This process produces articles having high heat distortion temperatures as well as porous layers with integrally formed skins. However, solid phase forming has not been used to form connected separately formed units. O'Connor and Gregg formed a non-textile fabric by coining single polymeric pellets into an individual element in a single forming step which can be simultaneously linked to form a continuous structure. This includes positioning a pellet in a mold cavity, and forcing the pellet into the shape of the mold cavity. The forcing step preferably uses an energy and speed where the pellet superplastically deforms to fill the mold cavity. This process is best carried out with four mutually interengaging rollers.
Apparatus and method for controlled pelletization processing
Boothe, Martin and Wright of Gala Industries, Inc., developed an apparatus and process maintain control of the temperature of low-melting compounds, high melt flow polymers, and thermally sensitive materials for the pelletization of such materials. The addition of a cooling extruder, and a second melt cooler if desired, in advance of the die plate provides for regulation of the thermal, shear, and rheological characteristics of narrow melting-range materials and polymeric mixtures, formulations, dispersions or solutions. The apparatus and process can then be highly regulated to produce consistent, uniform pellets of low moisture content for these otherwise difficult materials to pelletize. (RDC 12/7/2012)
Method and device for granulating plastics and/or polymers
Eloo and Veltel of Gala Industries, Virginia, developed a method and apparatus for the pelletization of plastics in which a melt coming from a melt generator is supplied via a diverter valve having different operating positions to a plurality of pelletizing heads through which the melt is pelletized. The pelletizing heads have different throughput capacities and are used sequentially for the start-up of the pelletizing process, with the melt first being supplied to a first pelletizing head having a smaller throughput capacity and then the melt volume flow being increased and the diverter valve being switched over such that the melt is diverted by the diverter valve to a second pelletizing head having a larger throughput capacity. (RDC 6/6/2012)
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Roger D. Corneliussen
Maro Polymer Links
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Copyright 2012 by Roger D. Corneliussen.
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** Date of latest addition; date of first entry is 6/6/2012.