Twin-screw extrusion production and characterization of starch foam products for use in cushioning and insulation applications.: An article from: Polymer Engineering and Science
Book Details
PublisherThomson Gale
ISBN / ASINB000FILBIW
ISBN-13978B000FILBI2
AvailabilityAvailable for download now
Sales Rank12,070,490
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from Polymer Engineering and Science, published by Thomson Gale on April 1, 2006. The length of the article is 8134 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
From the author: Cylindrical starch foam shapes were produced on a small scale (~11-12 kg/hr) Werner Pfleiderer ZSK-30 twin-screw extrusion (TSE) process using water, which functions as a plasticizer as well as a blowing agent. The properties of the starch foams depend on the type of starch used (hydroxypropylated high amylose corn starch, 70% amylose), the amount of water and additives (poly(hydroxyamino ether)) (PHAE) used, and extrusion conditions such as temperature and the screw configuration. PHAE offers the adhesion and durability of epoxy resins with the flexibility and processibility of thermoplastic resins. PHAE was successful in imparting mechanical strength and toughness, cell integrity, weather and water resistance to the foam structure. The purpose of this work was to study the effects of the extrusion (melt) temperature, amount of water added and the screw configuration on the density of starch foams. The water externally added was varied from 3% to 12%, while the PHAE content was varied from 3% to 15% of the starch used (on a wet basis). The foaming was carried out at melt temperatures in the range from 85 to 145[degrees]C. A match of material properties with process engineering conditions was achieved to facilitate the control of expansion to a structure with valuable commercial properties. The effects of processing conditions on the foaming process were studied using a Werner Pfleiderer ZSK-30 twin screw extruder. The optimum temperature, blowing agent content, and PHAE content were determined. The density of the cylindrical foam extrudates obtained was 22-25 kg/[m.sup.3]. The screw configuration, temperature and pressure profiles, and additives affected the morphology, expansion ratio (ER), resilience, and compressibility of the product. These results were then employed on an industrial scale (410-420 kg/hr) twin-screw food extruder, a Wenger-80, to manufacture foam sheets. The density of the foam sheets was 27-30 kg/[m.sup.3]. The cushioning and insulation properties were studied and are reported. POLYM. ENG. SCI., 46: 438-451, 2006. [c] 2006 Society of Plastics Engineers
Citation Details
Title: Twin-screw extrusion production and characterization of starch foam products for use in cushioning and insulation applications.
Author: Yogaraj Nabar
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: April 1, 2006
Publisher: Thomson Gale
Volume: 46 Issue: 4 Page: 438(14)
Distributed by Thomson Gale
From the author: Cylindrical starch foam shapes were produced on a small scale (~11-12 kg/hr) Werner Pfleiderer ZSK-30 twin-screw extrusion (TSE) process using water, which functions as a plasticizer as well as a blowing agent. The properties of the starch foams depend on the type of starch used (hydroxypropylated high amylose corn starch, 70% amylose), the amount of water and additives (poly(hydroxyamino ether)) (PHAE) used, and extrusion conditions such as temperature and the screw configuration. PHAE offers the adhesion and durability of epoxy resins with the flexibility and processibility of thermoplastic resins. PHAE was successful in imparting mechanical strength and toughness, cell integrity, weather and water resistance to the foam structure. The purpose of this work was to study the effects of the extrusion (melt) temperature, amount of water added and the screw configuration on the density of starch foams. The water externally added was varied from 3% to 12%, while the PHAE content was varied from 3% to 15% of the starch used (on a wet basis). The foaming was carried out at melt temperatures in the range from 85 to 145[degrees]C. A match of material properties with process engineering conditions was achieved to facilitate the control of expansion to a structure with valuable commercial properties. The effects of processing conditions on the foaming process were studied using a Werner Pfleiderer ZSK-30 twin screw extruder. The optimum temperature, blowing agent content, and PHAE content were determined. The density of the cylindrical foam extrudates obtained was 22-25 kg/[m.sup.3]. The screw configuration, temperature and pressure profiles, and additives affected the morphology, expansion ratio (ER), resilience, and compressibility of the product. These results were then employed on an industrial scale (410-420 kg/hr) twin-screw food extruder, a Wenger-80, to manufacture foam sheets. The density of the foam sheets was 27-30 kg/[m.sup.3]. The cushioning and insulation properties were studied and are reported. POLYM. ENG. SCI., 46: 438-451, 2006. [c] 2006 Society of Plastics Engineers
Citation Details
Title: Twin-screw extrusion production and characterization of starch foam products for use in cushioning and insulation applications.
Author: Yogaraj Nabar
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: April 1, 2006
Publisher: Thomson Gale
Volume: 46 Issue: 4 Page: 438(14)
Distributed by Thomson Gale
