coextrusion

coextrusion

[¦kō‚ik′strü·zhən]
(engineering)
Extrusion-forming of plastic or metal products in which two or more compatible feed materials are used in physical admixture through the same extrusion die.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
In general, owning the advantage of combining separate features of different individual polymers together in a facile way, technology of coextrusion has been widely used to fabricate multilayered composite sheets or films for various applications ranging from food packaging products to optical reflective films [1].
and 13 foreign countries and authored more than 50 technical articles and papers for innovations in extrusion, coextrusion, barrier packaging, die design, and calendering.
Another recent development is the AB coextrusion die which gives a 4:1 blow-up/stretch ratio and D-S says requires fewer blowing agents to achieve a high-density product.
Abstract: The invention concerns a yam comprising a core (A) obtained by coextrusion of a glass multifilament E, R, C or S, or more generally of glass silk or basalt, and a polymer sheath of the thermoplastic, thermoset, natural elastomer fluorinated or non-fluorinated synthetic elastomer type.
2002 TAPPI Film Extrusion and Coextrusion Short Course
New coextrusion systems from Macro Engineering & Technology, Mississauga, Ont., feature a more compact extruder design with a small footprint that allows more space in the extrusion area and simplifies installation.
The concept behind the original design, based on Dow Chemical technology, was that by dividing a coextrusion melt stream across its width and re-combining those new streams as a stack a film could be produced with many layers but without increasing its overall thickness.
(AMC) has introduced a coextrusion tooling system for hollow, solid, symmetrical, and asymmetrical profile cross sections for interior and exterior applications.
Until now, injection molders and firms making co-extruded products were mostly limited in their choices to between 50 and 70 durometer A hardness when seeking a soft TPE alloy for two-shot molding (overmolding onto engineering plastics, including ABS, PC, ABS/ PC, ASA, nylon 6, nylon 66, COPA, COPE and TPU substrates) and coextrusion, according to the company.
The coextrusion of two polymers through a single manifold flat die is examined.