scholarly journals Performance optimization of a counter rotating twin screw extruder for recycling natural rubber vulcanizates using response surface methodology

2004 ◽  
Vol 23 (4) ◽  
pp. 377-385 ◽  
Author(s):  
B. Maridass ◽  
B.R. Gupta
Keyword(s):  
Response Surface Methodology ◽  
Natural Rubber ◽  
Response Surface ◽  
Performance Optimization ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw ◽  
Natural Rubber Vulcanizates

scholarly journals OPTIMASI PROSES DAN FORMULA PADA PENGOLAHAN MI SAGU KERING (Metroxylon sagu) (Process and Formula Optimizations on Dried Sago Noodle Processing)

2016 ◽  
Vol 35 (04) ◽  
pp. 359 ◽  
Author(s):  
Adnan Engelen ◽  
Sugiyono Sugiyono ◽  
Slamet Budijanto
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Soybean Protein ◽  
Cooking Loss ◽  
Twin Screw Extruder ◽  
Process Variables ◽  
Glycerol Monostearate ◽  
Screw Extruder ◽  
Twin Screw ◽  
Metroxylon Sagu

The aim of this research was to optimize the processing of dried sago noodle. Sago noodle was made through a process using twin screw extruder with the addition of GMS (Glycerol Monostearate) and ISP (Isolated Soybean Protein).Process optimation was performed with RSM (response surface methodology) using three process variables, i.e. extruder temperature (65-80oC), GMS concentration (0-5%), and ISP concentration (0-10%). The optimum processcondition was temperature of 80oC, GMS of 4.5%, and ISP of 3.7%. The optimum condition produced dried noodlehaving a hardness of 2499.62 gf, stickiness of 235.12 gf, elongation of 168.96% and cooking loss of 6.23%.Keywords: Noodle, sago, starch, optimization ABSTRAKPenelitian ini bertujuan melakukan optimasi proses pada pembuatan mi sagu untuk menghasilkan mi sagu dengan karakteristik fisik yang baik. Mi sagu dihasilkan melalui optimasi proses menggunakan twin screw extruder dan penambahan glycerol monostearate (GMS), serta isolated soybean protein (ISP). Optimasi proses dilakukan menggunakan Response Surface Methodology (RSM) dengan tiga variabel proses yaitu: suhu ekstruder (65-80oC), konsentrasi GMS (0-5%), dan ISP (0-10%). Kondisi proses optimum diperoleh pada suhu 80oC, GMS (4,5%), danISP (3,7%). Kondisi optimum menghasilkan mi yang memiliki kekerasan 2499,62 gf, kelengketan 235,12gf, elongasi 168,96% dan cooking loss 6,23%,Kata kunci: Mi, sagu, pati, optimasi

scholarly journals Degradation of Styrenic Plastics during Recycling: Accommodation of PP within ABS after WEEE Plastics Imperfect Sorting

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1439
Author(s):  
Charles Signoret ◽  
Pierre Girard ◽  
Agathe Le Guen ◽  
Anne-Sophie Caro-Bretelle ◽  
José-Marie Lopez-Cuesta ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Design Of Experiments ◽  
Tensile Properties ◽  
Response Surface ◽  
Impact Resistance ◽  
Average Diameter ◽  
Contamination Rate ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw

With the development of dark polymers for industrial sorting technologies, economically profitable recycling of plastics from Waste Electrical and Electronical Equipment (WEEE) can be envisaged even in the presence of residual impurities. In ABS extracted from WEEE, PP is expected to be the more detrimental because of its important lack of compatibility. Hence, PP was incorporated to ABS at different rates (2 to 8 wt%) with a twin-screw extruder. PP was shown to exhibit a nodular morphology with an average diameter around 1–2 µm. Tensile properties were importantly diminished beyond 4 wt% but impact resistance was decreased even at 2 wt%. Both properties were strongly reduced as function of the contamination rate. Various potential compatibilizers for the ABS + 4 wt% PP system were evaluated: PPH-g-MA, PPC-g-MA, ABS-g-MA, TPE-g-MA, SEBS and PP-g-SAN. SEBS was found the most promising, leading to diminution of nodule sizes and also acting as an impact modifier. Finally, a Design Of Experiments using the Response Surface Methodology (DOE-RSM) was applied to visualize the impacts and interactions of extrusion temperature and screw speed on impact resistance of compatibilized and uncompatibilized ABS + 4 wt% PP systems. Resilience improvements were obtained for the uncompatibilized system and interactions between extrusion parameters and compatibilizers were noticed.

scholarly journals Optimasi Proses Pembuatan Mi Sorgum Dengan Menggunakan Ekstruder Ulir Ganda (Optimization of Sorghum Noodle Processing with Twin Screw Extruder)

1970 ◽  
Vol 3 (1) ◽  
pp. 1-7
Author(s):  
Tjahja Muhandri ◽  
Subarna Subarna ◽  
Ivan Mustakim
Keyword(s):  
Response Surface Methodology ◽  
Optimum Condition ◽  
Processing Condition ◽  
Cooking Loss ◽  
Optimum Process ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Screw Speed ◽  
Twin Screw ◽  
Optimum Processing Condition

The objective of this research was to optimize the sorghum noodle processing with two variables i.e. extruder temperature (80, 85, 90oC) and screw speed (10, 15, 20 Hz). The optimum process was chosen by using Response Surface Methodology (RSM), based on 2 parameters, i.e. cooking loss and elongation. The result of this research showed that the optimum processing condition with desirability of 0.736, was resulted from the combination of the extruder temperature of 85oC and screw speed of 20 Hz. The verification showed that the sorghum noodles from this optimum condition had cooking loss of 11.87 %, and elongation of 234.84.  Keywords: noodle, sorghum, optimization, twin screw extruder, RSM

scholarly journals Use of response surface methodology (RSM) for composite blends of low grade broken rice fractions and full-fat soybean flour by a twin-screw extrusion cooking process

2019 ◽  
Vol 8 (1) ◽  
Author(s):  
Nahemiah Danbaba ◽  
Iro Nkama ◽  
Mamudu Halidu Badau
Keyword(s):  
Response Surface Methodology ◽  
Bulk Density ◽  
Response Surface ◽  
Extrusion Cooking ◽  
Twin Screw Extrusion ◽  
Screw Extruder ◽  
Broken Rice ◽  
Screw Extrusion ◽  
Twin Screw ◽  
Feed Moisture

In this study, seventeen (17) composite blends of broken rice fractions and full-fat soybean, formulated using response surface methodology and central composite design within a range of barrel temperatures (100-140 °C), initial feed moisture content (15-25%) and soybean composition (8-24%), were extruded with a twin-screw extruder and the expansion and color indices were optimized. The results indicated a significant (p<0.05) effect of extrusion conditions on the responses. Fitted predictive models had coefficients of 88.9%, 95.7%, 97.3%, 95.4% and 95.2%, respectively, for expansion index, bulk density, lightness, redness and yellowness. The p-value and lack-of-fit tests of the models could well explain the observed variability and therefore could be used to establish production setting for the twin-screw extruder. The optimum extrusion conditions were found to be 130 °C (barrel temperature), 20% (feed moisture level) and 23% feed soybean composition and optimum responses in terms of bulk density, expansion index, lightness, redness and yellowness chroma indices were 0.21 g cm-3, 128.9%, 17.1, 3.13 and 24.5 respectively. This indicates that optimum conditions can be established in twin-screw extrusion cooking of broken rice fractions and full-fat soybean composite blends that can result in product of low bulk and maximum expansion with a satisfactory light yellow product color that can be used to produce products that valorize broken rice and reduce qualitative postharvest loss.

scholarly journals Devulcanization of Natural Rubber in Composites with Distinct Crosslink Densities by Twin-Screw Extruder

2017 ◽  
Vol 20 (suppl 2) ◽  
pp. 77-83 ◽  
Author(s):  
Rafael Barbosa ◽  
Anderson Thadeu Nunes ◽  
José Donato Ambrósio
Keyword(s):  
Natural Rubber ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw ◽  
Crosslink Densities

Natural Rubber Based Compatibilizer Prepared in Twin Screw Extruder: Optimization Percentage of Grafted Maleic Anhydride Using Experimental Design

2016 ◽  
Vol 864 ◽  
pp. 13-17 ◽  
Author(s):  
Onny Ujianto ◽  
Marzuki ◽  
Fitri Ayu Radini
Keyword(s):  
Experimental Design ◽  
Maleic Anhydride ◽  
Natural Rubber ◽  
Acid Group ◽  
Ftir Spectra ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Spectra Analysis ◽  
Ring Opening Reaction ◽  
Twin Screw

Maleic anhydride grafted natural rubber compatibilizer was prepared in molten state using twin screw extruder. Amount of maleic anhydride and initiator, as well as screw rotation were varied according to Box-Behnken experimental design. Titration of acid group from the anhydride function and FTIR spectra analysis were carried out as quantitative and qualitative analysis of grafted MA, respectively. The results showed that the percentages of grafted MA for all samples were ranged from 1.31 to 5.36%. The optimum conditions are predicted at 14.4 phr of MA level, 0.41 phr of BPO level, and 71 rpm screw rotation giving 5.39 ± 0.16% of grafted MA. FTIR spectra showed that the MA and carbonyl functional group were found in the compatibilizer suggested the presence of grafted MA and ring opening reaction.

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