Background noise analysis and improvement for the water vapor and oxygen transmission rate test of free-standing films

2021 ◽  
Vol 92 (2) ◽  
pp. 025124
Author(s):  
Longji Zhu ◽  
Qiaoxi Yu ◽  
Naveed Ur Rahman ◽  
Zhuxin Zhou ◽  
Seenivasagaperumal Sriram Babu ◽  
...  
Keyword(s):  
Water Vapor ◽  
Background Noise ◽  
Transmission Rate ◽  
Noise Analysis ◽  
Free Standing ◽  
Oxygen Transmission Rate ◽  
Rate Test ◽  
Oxygen Transmission

Effects of flexing, optical density, and lamination on barrier and mechanical properties of metallized films and aluminum foil centered laminates prepared with polyethylene terephthalate and linear low density polyethylene

2020 ◽  
pp. 875608792096353
Author(s):  
Changfeng Ge ◽  
Suraj Singh Verma ◽  
Jack Burruto ◽  
Nazar Ribalco ◽  
Janice Ong ◽  
...  
Keyword(s):  
Water Vapor ◽  
Transmission Rate ◽  
Aluminum Foil ◽  
Oxygen Barrier ◽  
Water Vapor Transmission Rate ◽  
Linear Low Density Polyethylene ◽  
Oxygen Transmission Rate ◽  
Water Vapor Transmission ◽  
Lamination Process ◽  
Oxygen Transmission

Flex barrier and optical density (OD) are two unique properties for metallized films and aluminum foil. This study investigated the effect of flexing on barrier properties of a laminate comprising metallized films and aluminum foil, as well as OD and adhesive lamination process on the overall multilayer laminate performance. Three (3) barrier layers, namely aluminum foil, metallized polyethylene terephthalate (met OPET) film with a high OD, and standard metallized PET film(met OPET), were laminated with the same printing layer OPET and sealing layer linear low density polyethylene (LLDPE), into OPET/adhesive/foil/adhesive/LLDPE and OPET/adhesive/met OPET/adhesive/LLDPE structures. The oxygen transmission rate (OTR) and water vapor transmission rate (WVTR) were measured before and after flexing. The aluminum foil centered laminate had an excellent oxygen barrier after the 20-cycle flexing test and failed to retain its oxygen barrier after the 270-cycle flexing. Compared to the aluminum foil centered laminate, the metallized film centered laminates were less affected by the flexing on the oxygen barrier. For all laminates, the water vapor barrier was less severely affected by flexing than the oxygen barrier. This study suggests that the ASTMF392 Gelbo D (20- cycle flexing) can determine if aluminum foil and metallized film centered laminates are resistant to flex-formed pinhole failures. A higher OD, a thicker film thickness and lamination process improved laminate’s actual barrier, resulting in lower measured transmission rates versus that predicted using Henry's solubility law and Fick's diffusion law. The laminate’s water vapor transmission rate is 55–74% lower than predicted. The oxygen transmission rate is 15–31% lower than predicted.

Polymerization and Characterization of Gas Permselectivity Functional Packaging Materials

2011 ◽  
Vol 380 ◽  
pp. 278-281
Author(s):  
Ya Bo Fu ◽  
Wen Cai Xu ◽  
Dong Li Li ◽  
Xi Wang
Keyword(s):  
Water Vapor ◽  
Transmission Rate ◽  
Chemical Vapor ◽  
Input Power ◽  
Film Properties ◽  
Oxygen Transmission Rate ◽  
Selective Permeability ◽  
Rate Test ◽  
Oxygen Gas

Gas permselectivity film is an emerging material which enables it with gas selective permeability functions so as to keep the preservation atmosphere including water vapor, oxygen and other gas concentration of inner packages and thus extends the preservation period of fresh fruits. In this work, the monomer Hexamethyldisilazane (HMDS) and oxygen gas were applied as the precursor and reaction gas, the gas permselective material were deposited on PET and Chitosan substrate by plasma enhanced chemical vapor deposition (PECVD) method, respectively. Different reaction parameters such as monomer proportions, plasma input powers and deposition time were investigated respectively. The film properties were analyzed by Surface Profiler thickness test, Fourier Transform Infrared Spectroscopy (FTIR), water vapor transmission rate test (WVTR) and oxygen transmission rate test (OTR). The experimental results showed that plasma input power and monomer ratio influence the gas selective permeation (OTR/WVTR ratio) greatly. And also, the mechanism of gas selective permeation of the film was preliminary discussed.

Measurement of oxygen transmission rate through foamed materials for bottle closures

2009 ◽  
Vol 23 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Maria F. Poças ◽  
Belmiro Ferreira ◽  
Joel Pereira ◽  
Timothy Hogg
Keyword(s):  
Transmission Rate ◽  
Oxygen Transmission Rate ◽  
Oxygen Transmission

scholarly journals High Oxygen and Water-Vapor Transmission Rate and In Vitro Cytotoxicity Assessment with Illite-Polyethylene Packaging Films

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2382
Author(s):  
Dong Min Seong ◽  
Heysun Lee ◽  
Jungbae Kim ◽  
Jeong Ho Chang
Keyword(s):  
Water Vapor ◽  
Composite Film ◽  
Transmission Rate ◽  
In Vitro Cytotoxicity ◽  
Banana Peel ◽  
Water Vapor Transmission Rate ◽  
Oxygen Transmission Rate ◽  
Water Vapor Transmission ◽  
Twin Screw

This work reports the preparation of a ceramic hybrid composite film with illite and polyethylene (illite-PE), and the evaluation of the freshness-maintaining properties such as oxygen transmission rate (OTR), water vapor transmission rate (WVTR), tensile strength, and in vitro cytotoxicity. The particle size of the illite material was controlled to within 10 μm. The illite-PE masterbatch and film were prepared using a twin-screw extruder and a blown film maker, respectively. The dispersity and contents of illite material in each masterbatch and composite film were analyzed using a scanning electron microscope (SEM) and thermogravimetric analyzer (TGA). In addition, the OTR and WVTR of the illite-PE composite film were 8315 mL/m2·day, and 13.271 g/m2·day, respectively. The in vitro cytotoxicity of the illite-PE composite film was evaluated using L929 cells, and showed a cell viability of more than 92%. Furthermore, the freshness-maintaining property was tested for a packaging application with bananas; it was found to be about 90%, as indicated by changes in the color of the banana peel, after 12 days.

Opto-chemical method for ultra-low oxygen transmission rate measurement

2009 ◽  
Author(s):  
M. Tscherner ◽  
C. Konrad ◽  
A. Bizzarri ◽  
M. Suppan ◽  
M. Cajlakovic ◽  
...  
Keyword(s):  
Chemical Method ◽  
Transmission Rate ◽  
Rate Measurement ◽  
Low Oxygen ◽  
Oxygen Transmission Rate ◽  
Oxygen Transmission
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