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Extrusion foams

Foamed polystyrene - which is also known as expanded polystyrene - is used extensively in a variety of applications, ranging from packaging peanuts to insulation board and single-use cups and plates. We produce it by two processes foam extrusion andbead expansion. Both types of expanded polystyrene consist of closed ceUs, i.e., bubbles with continuous walls. We can visually distinguish the two types of foam by the fact that products made by the expanded bead process consist of discrete beads that are welded together [Pg.318]

Foaming extrusion Foaming-in-place beads Foaming power Foam inhibitors... [Pg.416]

Material Family Injection Compression Hansfer Casting Cold Molding Coating Structural Foam Extrusion Laminating Sheet Forming RP Molding FRP Filament Dip and Slush Blow Rotational... [Pg.556]

Compare and contrast the bead expansion and foam extrusion methods of creating foamed polystyrene. [Pg.341]

Foamed boards, 23 403—404 Foamed polystyrene, 23 403 Foamed sheet polystyrene, 23 408 Foamex, commercial defoamer, 3 24 It Foam extrusion, 19 549 Foam-forming materials, injection of, 12 22-23... [Pg.373]

Fogarty, L, Thermoplastic Foam Extrusion Screw with Circulation Chaimels, U. S. Patent 6,015,227 (2000)... [Pg.684]

Fogarty, L, Fogarty, D., and Rios, A., Turbo-Screws , New Screw Design for Foam Extrusion, SPEANTEC Tech. Papers, 47, 167 (2001)... [Pg.684]

Table 2 Die dimensions and residence time for microcellular foam extrusion ... Table 2 Die dimensions and residence time for microcellular foam extrusion ...
FOAM EXTRUSION OF POLYPROPYLENE FOAMS - NEW DEVELOPMENTS AND APPPLICATIONS... [Pg.27]

STUDY OF SHEAR NUCLEATION THEORY IN CONTINUOUS MICROCELLULAR FOAM EXTRUSION... [Pg.28]

A theoretical analysis based on shear energy was carried out with the aim of illustrating the mechanism of shear nucleation through a slit channel die in continuous microcellular foam extrusion. The shear energies for different positions and for different experimental conditions were calculated to demonstrate the various contributions to the surface free energy required for bubble nucleation. 14 refs. [Pg.28]

Journal of Applied Polymer Science 88, No.14, 28th June 2003, p3139-50 FOAM EXTRUSION OF HIGH DENSITY POLYETHYLENEAVOOD-FLOUR... [Pg.28]

Dallas, Texas, 6th-10th May, 2001, paper 442 FOAM EXTRUSION OF SYNDIOTACTIC POLYPROPYLENE-POLYETHYLENE BLENDS Park CP... [Pg.44]

Houston, Tx., 27th Feb.-lst March 2000, p.449-56 THIN GAUGE POLYETHYLENE FOAM EXTRUSION Sreenath G K... [Pg.51]

Orlando, FL, 7th-llth May, 2000, paper 70 NUCLEATION IN FOAM EXTRUSION Lee S T... [Pg.54]

Foam extrusion experiments are performed to study the effects of surrounding temperature variation on cell structure. LLDPE is used with endothermic chemical blowing agent on a single-screw extruder to exit from a capillary die into environments with different... [Pg.64]

This paper examines in some detail the method of extrusion coating PE foam onto a woven cloth. An experiment is described in which the feasibility of foam extrusion coating was examined in order to produce a cost effective product. 4 refs. [Pg.85]

Shear enhancement effects in foam formation can be understood through the modified cavity model. Shear force behaves as catalyst to reduce energy barrier to allow a quik path from stable gas cavity to unstable bubble phase. It can be concluded that both shear rate and viscosity contribute to foam nucleation in the continuous foam extrusion process. Therefore, proper die opening and process conditions will help to optimise the foam product. 11 refs. [Pg.106]

Throne JL (2004) Thermoplastic Foam Extrusion. Carl Hanser, Miinchen, p 63... [Pg.136]

Adhesives (qv) used to make plywood are classified as either the exterior adhesive or the lesser quality interior adhesive. The terms relate to the ability of the adhesive to survive exposure to moisture and weather. Phenolic resins (qv) are commonly used as adhesives to make plywood. The difference between interior and exterior phenolic resin adhesive is the filler level. Exterior rated plywood uses higher resin content adhesives. Interior rated plywood uses either highly extended (below 24% resin solids) or protein-based adhesives. The adhesive is applied to the veneer by roll coating, spraying, curtain coating, or foam extrusion. [Pg.318]

Nam GJ, Yoo JH, Lee JW (2005) Effect of long-chain branches of polypropylene on rheological properties and foam-extrusion performances. J Appl Polym Sci 96 1793-1800... [Pg.248]

Lee ST (2000) Foam extrusion. Principles and practice. Technomic Publishing Company, Lancaster... [Pg.250]

Die design is critical because in foam extrusion the viscosity of the melt is so high that imperfections from the screw or from the die flow are easily transmitted to the output product. To prevent this, the entrance to the die is designed to have a restrictive flow passage to help heal the melt as it comes off the screw flights and through spiders, and to provide for uniform flow into the die body (Chapter 17). [Pg.353]

See other pages where Extrusion foams is mentioned: [Pg.141]    [Pg.146]    [Pg.336]    [Pg.497]    [Pg.332]    [Pg.10]    [Pg.20]    [Pg.30]    [Pg.42]    [Pg.43]    [Pg.44]    [Pg.45]    [Pg.65]    [Pg.74]    [Pg.76]    [Pg.80]    [Pg.106]    [Pg.114]    [Pg.124]    [Pg.141]    [Pg.247]    [Pg.182]    [Pg.134]    [Pg.135]   
See also in sourсe #XX -- [ Pg.318 ]

See also in sourсe #XX -- [ Pg.318 ]



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