Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1997-01-16
1998-10-13
Green, Lora M.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
26432814, 2643288, 26432815, 26432816, 26433111, 26432817, B29C 4500, B29C 4502, B29B 700
Patent
active
058208089
ABSTRACT:
A method for forming an injection molded component from a host polymer (18) uses a very small quantity of an additive (32) that is efficiently driven to the surface of the component during the injection molding process. The additive exists in the host polymer at a very low concentration in the bulk, much lower than would be necessary to achieve the modification in a homogeneous blend. The additive is an insoluble liquid in the host polymer under the temperature and pressure conditions of injection molding. The additive is driven to the flow front surface (22) during injection molding and then translated to the surface (24) of the component by fountain flow and is distributed on the surface in a thin layer, producing the desired surface modification, without altering the properties of the bulk polymer, and eliminating post processing steps from the manufacturing process.
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Ellwood Kevin R. J.
Mielewski Deborah F.
van Oene Henk
Ford Global Technologies Inc.
Green Lora M.
Malleck Joseph W.
May Roger L.
Ricigliano Joseph W.
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