Pub Date : 2023-08-02DOI: 10.1177/87560879231186783
Z. Abbas, S. Khaliq, Sibgha Ihsan, M. Rafiq
Industries widely use the calendering process to create coated fabrics, thermoplastic films, plastic sheeting, and textile fabrics to procure the prerequisite surface smoothness plus texture. This article inspects the non-isothermal calendering phenomena with heat transfer mechanism to report the rheological behavior of Prandtl fluid on the sensitivity of sheet thickness with velocity slip at roll’s surface. Lubrication theory is utilized to simplify the governing expressions before normalization. We obtained the zeroth plus first order perturbative solutions for the velocity profile, pressure gradient, pressure distribution, temperature, and sheet thickness. And other mechanical properties are evaluated with a numerical solution. Through graphs and tabular data, how material parameters influence the various flow and engineering parameters are reported. As it can be seen, the material parameters are the main parameters that control the pressure gradient, leading to different final sheet thickness and separating force. As the material parameters increased, sheet thickness and separating force increased.
{"title":"Final sheet thickness variation during the non-isothermal calendering process of rheological Prandtl fluid polymer","authors":"Z. Abbas, S. Khaliq, Sibgha Ihsan, M. Rafiq","doi":"10.1177/87560879231186783","DOIUrl":"https://doi.org/10.1177/87560879231186783","url":null,"abstract":"Industries widely use the calendering process to create coated fabrics, thermoplastic films, plastic sheeting, and textile fabrics to procure the prerequisite surface smoothness plus texture. This article inspects the non-isothermal calendering phenomena with heat transfer mechanism to report the rheological behavior of Prandtl fluid on the sensitivity of sheet thickness with velocity slip at roll’s surface. Lubrication theory is utilized to simplify the governing expressions before normalization. We obtained the zeroth plus first order perturbative solutions for the velocity profile, pressure gradient, pressure distribution, temperature, and sheet thickness. And other mechanical properties are evaluated with a numerical solution. Through graphs and tabular data, how material parameters influence the various flow and engineering parameters are reported. As it can be seen, the material parameters are the main parameters that control the pressure gradient, leading to different final sheet thickness and separating force. As the material parameters increased, sheet thickness and separating force increased.","PeriodicalId":16823,"journal":{"name":"Journal of Plastic Film & Sheeting","volume":"58 5 1","pages":"399 - 426"},"PeriodicalIF":3.1,"publicationDate":"2023-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77315652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.1177/87560879231186427
Rula M Allaf, Mohammad Futian
Cryomilling is a promising method for fabricating polymeric blend and composite powder raw materials for various subsequent manufacturing processes. In this study, biodegradable porous membranes were fabricated from poly (ε-caprolactone) (PCL) using the cryomilling/hot pressing/porogen leaching approach. Powder mixtures of six different model compositions were compounded by cryomilling; thereafter, films were fabricated by hot-pressing. Poly (ethylene-oxide) (PEO) and salt were utilized as eco-friendly porogens in these mixtures, which were dissolved in water to introduce porosity in the films. Wood sawdust (WSD) and alum were investigated as fillers potentially capable of manipulating the hydrophilicity, mechanical and antimicrobial properties of the membranes. The morphological, hydrophilicity, mechanical, and filtration efficiency properties were explored and compared to those of commercial laboratory microfiltration (MF) membranes. SEM analysis revealed dense membrane skins for all compositions, along with lamellar porous structures. Mean pore radius ranged from 0.15 to 0.21 μm, which is within the MF pore size range. Water contact angle measurements averaged 70° and decreased with the addition of WSD and alum, indicating increased hydrophilicity. Tensile test results showed a decrease in mechanical properties, with higher porosities and with the addition of WSD. Adding alum (≥10 wt%) resulted in embrittled membranes. Filtration performance was evaluated in terms of pure water flux and turbidity reduction for textile wastewater, and it compared favorably to commercial membranes. In conclusion, this study has successfully introduced a new facile and versatile membrane fabrication approach.
{"title":"Solid-state blending for the preparation of porous eco-friendly PCL membranes: Potential for filtration applications","authors":"Rula M Allaf, Mohammad Futian","doi":"10.1177/87560879231186427","DOIUrl":"https://doi.org/10.1177/87560879231186427","url":null,"abstract":"Cryomilling is a promising method for fabricating polymeric blend and composite powder raw materials for various subsequent manufacturing processes. In this study, biodegradable porous membranes were fabricated from poly (ε-caprolactone) (PCL) using the cryomilling/hot pressing/porogen leaching approach. Powder mixtures of six different model compositions were compounded by cryomilling; thereafter, films were fabricated by hot-pressing. Poly (ethylene-oxide) (PEO) and salt were utilized as eco-friendly porogens in these mixtures, which were dissolved in water to introduce porosity in the films. Wood sawdust (WSD) and alum were investigated as fillers potentially capable of manipulating the hydrophilicity, mechanical and antimicrobial properties of the membranes. The morphological, hydrophilicity, mechanical, and filtration efficiency properties were explored and compared to those of commercial laboratory microfiltration (MF) membranes. SEM analysis revealed dense membrane skins for all compositions, along with lamellar porous structures. Mean pore radius ranged from 0.15 to 0.21 μm, which is within the MF pore size range. Water contact angle measurements averaged 70° and decreased with the addition of WSD and alum, indicating increased hydrophilicity. Tensile test results showed a decrease in mechanical properties, with higher porosities and with the addition of WSD. Adding alum (≥10 wt%) resulted in embrittled membranes. Filtration performance was evaluated in terms of pure water flux and turbidity reduction for textile wastewater, and it compared favorably to commercial membranes. In conclusion, this study has successfully introduced a new facile and versatile membrane fabrication approach.","PeriodicalId":16823,"journal":{"name":"Journal of Plastic Film & Sheeting","volume":"4 1","pages":"375 - 398"},"PeriodicalIF":3.1,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73289294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.1177/87560879231184338
{"title":"Industry news","authors":"","doi":"10.1177/87560879231184338","DOIUrl":"https://doi.org/10.1177/87560879231184338","url":null,"abstract":"","PeriodicalId":16823,"journal":{"name":"Journal of Plastic Film & Sheeting","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136017032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-17DOI: 10.1177/87560879231181543
T. Womer, M. Spalding
All sections of a single-screw extruder must be operating well to maintain the maximum profitability of the line. The solids conveying section must be able to operate at a rate high enough to keep the metering section full of resin and pressurized. Optimal solids conveying depends on the forwarding and retarding forces on the solid bed, and these forces depend on the barrel and screw temperatures. Usually, a considerable level of care is given to setting the barrel and feed casing temperatures. The temperature of the screw, however, is typically not controlled. Instead, the screw temperature is unknown and often hotter than optimal. Screw cooling can improve solids conveying for many processes. This paper discusses the fundamentals and operational practices for using screw cooling.
{"title":"The benefits of screw cooling for improved solids conveying for smooth-bore, single-screw extruders","authors":"T. Womer, M. Spalding","doi":"10.1177/87560879231181543","DOIUrl":"https://doi.org/10.1177/87560879231181543","url":null,"abstract":"All sections of a single-screw extruder must be operating well to maintain the maximum profitability of the line. The solids conveying section must be able to operate at a rate high enough to keep the metering section full of resin and pressurized. Optimal solids conveying depends on the forwarding and retarding forces on the solid bed, and these forces depend on the barrel and screw temperatures. Usually, a considerable level of care is given to setting the barrel and feed casing temperatures. The temperature of the screw, however, is typically not controlled. Instead, the screw temperature is unknown and often hotter than optimal. Screw cooling can improve solids conveying for many processes. This paper discusses the fundamentals and operational practices for using screw cooling.","PeriodicalId":16823,"journal":{"name":"Journal of Plastic Film & Sheeting","volume":"112 1","pages":"344 - 354"},"PeriodicalIF":3.1,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73309860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-13DOI: 10.1177/87560879231178350
E. Lightfoot
Neck-in during melt casting of polymeric film and extrusion coating along with the related issue of edge bead formation, has been widely studied. However, one aspect of this problem that has received relatively little attention is empirical correlations for the thickness profile near the edges of the sheet. The correlations given here may prove useful for industrial operations as well as provide benchmarks for numerical studies of the myriad factors that influence neck-in.
{"title":"Simple Correlations for Thickness Profiles in Melt Casting","authors":"E. Lightfoot","doi":"10.1177/87560879231178350","DOIUrl":"https://doi.org/10.1177/87560879231178350","url":null,"abstract":"Neck-in during melt casting of polymeric film and extrusion coating along with the related issue of edge bead formation, has been widely studied. However, one aspect of this problem that has received relatively little attention is empirical correlations for the thickness profile near the edges of the sheet. The correlations given here may prove useful for industrial operations as well as provide benchmarks for numerical studies of the myriad factors that influence neck-in.","PeriodicalId":16823,"journal":{"name":"Journal of Plastic Film & Sheeting","volume":"76 1","pages":"286 - 303"},"PeriodicalIF":3.1,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73026617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-10DOI: 10.1177/87560879231183186
Huqiu Zhang
Government agencies around the world regulate food contact materials or articles. Understanding these regulations and keeping up with the new regulations are essential for maintaining market access for food contact products. My intent is to provide global plastics food contact regulation developments and updates relevant to plastic film and sheet for food packaging.
{"title":"Global food contact regulation updates for 3rd quarter 2023","authors":"Huqiu Zhang","doi":"10.1177/87560879231183186","DOIUrl":"https://doi.org/10.1177/87560879231183186","url":null,"abstract":"Government agencies around the world regulate food contact materials or articles. Understanding these regulations and keeping up with the new regulations are essential for maintaining market access for food contact products. My intent is to provide global plastics food contact regulation developments and updates relevant to plastic film and sheet for food packaging.","PeriodicalId":16823,"journal":{"name":"Journal of Plastic Film & Sheeting","volume":"13 1","pages":"278 - 280"},"PeriodicalIF":3.1,"publicationDate":"2023-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77323746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-08DOI: 10.1177/87560879231183039
Shari Kraber
stage of analyzing designed experiments data is determining the optimal set of process conditions that works for
分析设计的实验数据的阶段是确定工作的最佳工艺条件集
{"title":"Unraveling the mystery of multi-response optimization","authors":"Shari Kraber","doi":"10.1177/87560879231183039","DOIUrl":"https://doi.org/10.1177/87560879231183039","url":null,"abstract":"stage of analyzing designed experiments data is determining the optimal set of process conditions that works for","PeriodicalId":16823,"journal":{"name":"Journal of Plastic Film & Sheeting","volume":"122 1","pages":"281 - 285"},"PeriodicalIF":3.1,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77942025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
»Mulholland Drive« (2001) von David Lynch ist ein Filmklassiker und ein Stück Popkultur. Seine Attraktion beruht vor allem auf der bedeutungsoffenen und »verrätselnden« Erzählweise, welche Zuschauende zur Interpretation einlädt. Christine Lang legt in einer detaillierten Studie dar, wie sich diese Rezeptionsbeziehung realisiert. Sie analysiert die narrative Struktur und die ästhetischen Strategien mit Methoden und Begriffen der Dramaturgie und macht den Film und seine avancierte Erzählweise dadurch auch inhaltlich nachvollziehbar.
{"title":"David Lynchs »Mulholland Drive« verstehen","authors":"Christine Lang","doi":"10.14361/9783839466476","DOIUrl":"https://doi.org/10.14361/9783839466476","url":null,"abstract":"»Mulholland Drive« (2001) von David Lynch ist ein Filmklassiker und ein Stück Popkultur. Seine Attraktion beruht vor allem auf der bedeutungsoffenen und »verrätselnden« Erzählweise, welche Zuschauende zur Interpretation einlädt. Christine Lang legt in einer detaillierten Studie dar, wie sich diese Rezeptionsbeziehung realisiert. Sie analysiert die narrative Struktur und die ästhetischen Strategien mit Methoden und Begriffen der Dramaturgie und macht den Film und seine avancierte Erzählweise dadurch auch inhaltlich nachvollziehbar.","PeriodicalId":16823,"journal":{"name":"Journal of Plastic Film & Sheeting","volume":"38 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81346741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-17DOI: 10.1177/87560879231164237
{"title":"Industry News","authors":"","doi":"10.1177/87560879231164237","DOIUrl":"https://doi.org/10.1177/87560879231164237","url":null,"abstract":"","PeriodicalId":16823,"journal":{"name":"Journal of Plastic Film & Sheeting","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135350070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：