Polymer Extrusion
Polymer Extrusion - Related Videos
10:22
Demonstration of the Power Law Model Through Extrusion
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2023
Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Polymer melts are often formed into simple shapes or "extrudates", such as cylindrical pellets, flat sheets, or pipe, using an extruder.1 Polyolefins are among the most common extrudable polymers. Extrusion involves transporting and melting solid feed, which is sometimes mixed with non-polymeric materials, and the pressure build-up and transport of the melt or mixture.
08:15
Data Communication Based on MQTT in a Polymer Extrusion Process
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Cited by 1 •
2022
This work proposes a flexible method for data communication between a film extrusion system and monitoring devices based on a message protocol called Message Queuing Telemetry Transport (MQTT).
09:39
Live Imaging of Cell Extrusion from the Epidermis of Developing Zebrafish
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Cited by 20 •
2011
Dying cells are extruded from epithelial tissues by concerted contraction of neighboring cells without disrupting barrier function. The optical clarity of developing zebrafish provides an excellent system to visualize extrusion in living epithelia. Here we describe methods to induce and image extrusion in the larval zebrafish epidermis at cellular resolution.
02:34
Polymers
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2020
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
08:10
Hydraulic Extrusion of the Spinal Cord and Isolation of Dorsal Root Ganglia in Rodents
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Cited by 110 •
2017
Here, we present a protocol for hydraulic extrusion of the spinal cord as well as identification and isolation of specific dorsal root ganglia (DRGs) in the same rodent. Compared to standard spinal cord isolation methods, this method is significantly faster and reduces the risk of tissue damage.
FAQs
Heat and mechanical shear work together to soften or melt polymer pellets. As the screw rotates, it conveys material through the extruder, mixes it, and builds pressure for passage through the die. This combined action creates a workable, controlled flow rather than relying on heating alone. In engineering terms, screw motion also supports material uniformity before shaping, which helps produce consistent profiles during continuous manufacture.
Temperature, screw speed, pressure, and cooling conditions jointly determine how the polymer flows and how the finished profile performs. Temperature affects softening or melting, while screw speed influences conveying and mixing. Pressure supports movement through the die. Coordinating these variables helps control dimensions, surface quality, and mechanical performance rather than treating them as isolated settings.
Cooling is the stage that solidifies the shaped profile after it leaves the die. Its conditions influence final dimensions, surface quality, and mechanical performance because the material changes from a softened or molten state to a stable product. Engineering control therefore links thermal processing to dimensional consistency and usable properties.
A practical Polymer Extrusion workflow coordinates four linked actions: feed polymer pellets, apply heat and screw motion, build pressure for passage through the selected die, and cool the emerging profile. Engineers then tune temperature, screw speed, pressure, and cooling conditions to match the required dimensions and performance. This sequence supports repeatable continuous production across different product forms.
Polymer extrusion supports products with constant cross-sectional profiles, including pipes, films, sheets, fibers, insulation, and filament for additive manufacturing. The die determines the product shape, while processing conditions affect its dimensions, surface quality, and mechanical performance. This combination makes the process suitable for efficient, large-scale production of varied polymer-based components.
The process can produce tailored products from thermoplastics and polymer composites by adjusting operating conditions to influence flow and final performance. Extruded filament provides a direct connection to additive manufacturing, where a continuous polymer form serves as the product material. In engineering, this broad material and application range connects continuous processing with both conventional products and newer fabrication approaches.