Study Main Properties of Two Systems Watermark Varnish

2011 ◽  
Vol 380 ◽  
pp. 117-120
Author(s):  
Ling Ya Gu ◽  
Bei Qing Huang ◽  
De Ping Zhao ◽  
Wei Yuan
Keyword(s):  
Refractive Index ◽  
Specific Gravity ◽  
Vegetable Oil ◽  
Screen Printing ◽  
Uv Light ◽  
Uv Curing ◽  
Index Study ◽  
Two Systems ◽  
Light Curing ◽  
Better Than

In order to obtain good watermark on paper by printing, vegetable oil system and UV light-curing system watermark varnish were prepared by changing the type of vegetable oil, prepolymer and monomer, then test its permeability and refractive index, study the effects of these components on the performance of watermark varnish. Print watermark varnish by screen printing to examine the watermark. The results show that watermark varnish prepared with different type of vegetable oil has different permeability, but refractive index is very close. Adding prepolymer can improve permeability and refractive index of vegetable oil system watermark varnish. If the specific gravity of prepolymer and monomer is greater, permeability of UV curing system watermark varnish is higher. If refractive index of prepolymer and monomer is bigger, refractive index of varnish is bigger. Printing effect of UV curing system watermark varnish is better than vegetable oil system watermark varnish.

scholarly journals Biodiesel Production and Characterization from Used Vegetable Oil

2021 ◽  
Vol 25 (4) ◽  
pp. 537-542
Author(s):  
C.A. Odega ◽  
G.T. Anguruwa ◽  
C.O. Fakorede
Keyword(s):  
Refractive Index ◽  
Specific Gravity ◽  
Moisture Content ◽  
Cloud Point ◽  
Vegetable Oil ◽  
Positive Impact ◽  
Flash Point ◽  
International Standards ◽  
Biodiesel Production ◽  
Used Vegetable Oil

Biodiesel is a fuel produced from renewable resources; it is a clean alternative fuel, which has drawn the attention of energy researchers for the last two decades due to the disturbing effect of climate change caused by diesel fuel. This paper focuses on showcasing the qualities of biodiesel produced from used vegetable oil and the positive impact on the alarming change in climate today. This paper presents an experimental investigation on production of biodiesel from used vegetable oil (UVO) gotten from a road side bean cake (akara) seller. The oil that was intended to be thrown out was de-odoured and filtered to remove impurities. The filtered oil was then used for biodiesel production and characterized with physical and fuel properties such as density, viscosity, cloud point, refractive index, specific gravity, ash content, moisture content, flash point and cloud point. The results obtained were afterwards compared to ASTM (American Society for Testing and Materials) and EN (Europe’s) international standards. Two biodiesels samples were produced at different temperatures but the same timings. The biodiesel were produced at 700C at 40mins (biodiesel A) and 1000C at 40mins (biodiesel B) with values of specific gravity (0.98 kg/m3; 0.90 kg/m3), density (936kg/m3; 882kg/m3), kinematic viscosity (1.5mm/s2; 5.5 mm/s2), cloud point (150C; 20C), flash point (2600C min; 2000C min), moisture content (0.07%; 0.04%), refractive index (1.4609; 1.4398) and ash point (0.24%; 0.01%) respectively. On comparison, biodiesel A couldn’t match up to the international standards while biodiesel matched up to the standards given.

scholarly journals UV-Light Curing of 3D Printing Inks from Vegetable Oils for Stereolithography

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1195
Author(s):  
Anda Barkane ◽  
Oskars Platnieks ◽  
Maksims Jurinovs ◽  
Sigita Kasetaite ◽  
Jolita Ostrauskaite ◽  
...  
Keyword(s):  
Vegetable Oils ◽  
Uv Light ◽  
Irradiation Time ◽  
Uv Curing ◽  
Crosslinking Density ◽  
Reactive Diluents ◽  
Trimethylolpropane Triacrylate ◽  
Double Bond Conversion ◽  
Light Curing ◽  
Mechanical Performances

Typical resins for UV-assisted additive manufacturing (AM) are prepared from petroleum-based materials and therefore do not contribute to the growing AM industry trend of converting to sustainable bio-based materials. To satisfy society and industry’s demand for sustainability, renewable feedstocks must be explored; unfortunately, there are not many options that are applicable to photopolymerization. Nevertheless, some vegetable oils can be modified to be suitable for UV-assisted AM technologies. In this work, extended study, through FTIR and photorheology measurements, of the UV-curing of epoxidized acrylate from soybean oil (AESO)-based formulations has been performed to better understand the photopolymerization process. The study demonstrates that the addition of appropriate functional comonomers like trimethylolpropane triacrylate (TMPTA) and the adjusting of the concentration of photoinitiator from 1% to 7% decrease the needed UV-irradiation time by up to 25%. Under optimized conditions, the optimal curing time was about 4 s, leading to a double bond conversion rate (DBC%) up to 80% and higher crosslinking density determined by the Flory–Rehner empirical approach. Thermal and mechanical properties were also investigated via TGA and DMA measurements that showed significant improvements of mechanical performances for all formulations. The properties were improved further upon the addition of the reactive diluents. After the thorough investigations, the prepared vegetable oil-based resin ink formulations containing reactive diluents were deemed suitable inks for UV-assisted AM, giving their appropriate viscosity. The validation was done by printing different objects with complex structures using a laser based stereolithography apparatus (SLA) printer.

scholarly journals Effect of curing parameters and configuration on the efficacy of ultraviolet light curing self-adhesive masks used for abrasive jet micro-machining and microfluidic device fabrication

2021 ◽  
Author(s):  
Farbod Ahmadzadeh
Keyword(s):  
Microfluidic Chip ◽  
Biomedical Applications ◽  
Uv Light ◽  
Three Dimensional ◽  
Uv Curing ◽  
Device Fabrication ◽  
Flow Focusing ◽  
Three Dimensional Flow ◽  
Dimensional Flow ◽  
Light Curing

Soft lithography techniques has been used widely in the past decade to fabricate microfluidic chips used in biomedical applications. Abrasive jet machining (AJM) has been used to fabricate similar chips using particle erosion mechanisms. This thesis proposes a new technique using a UV light sensitive self-adhesive mask (RapidMask) and AJM to fabricate a three dimensional flow focusing microfluidic chip where the depth of the channel is allowed to vary along the channel length. A detailed characterization of the effect of curing parameters of a UV light curing self-adhesive mask on the resulting feature resolution is reported. Instead of relying on the manufacturer recommended curing parameters which were vaguely described for specific UV curing units, it was found that measured energy density could be used to quantify a recommended cure that is independent of the curing unit. The best achievable pattern on borosilicate glass using RM and AJM was found and reported along with the erosion rates of uncured, cured RM during AJM. A new methodology was introduced to use multiple layers of the RM in order to increase the achievable feature aspect ratio. The results of the RM curing and multiple layer investigation were then used to fabricate a three dimensional flow focusing chip with a varying depth at the focusing junction. The chip was then sealed and tested to demonstrate its capabilities and potential in healthcare and biomedical applications. To the best knowledge of the author, this thesis is the first to report using a double layer RM to fabricate a microfluidic chip using AJM.

scholarly journals Effect of curing parameters and configuration on the efficacy of ultraviolet light curing self-adhesive masks used for abrasive jet micro-machining and microfluidic device fabrication

2021 ◽  
Author(s):  
Farbod Ahmadzadeh
Keyword(s):  
Microfluidic Chip ◽  
Biomedical Applications ◽  
Uv Light ◽  
Three Dimensional ◽  
Uv Curing ◽  
Device Fabrication ◽  
Flow Focusing ◽  
Three Dimensional Flow ◽  
Dimensional Flow ◽  
Light Curing

Soft lithography techniques has been used widely in the past decade to fabricate microfluidic chips used in biomedical applications. Abrasive jet machining (AJM) has been used to fabricate similar chips using particle erosion mechanisms. This thesis proposes a new technique using a UV light sensitive self-adhesive mask (RapidMask) and AJM to fabricate a three dimensional flow focusing microfluidic chip where the depth of the channel is allowed to vary along the channel length. A detailed characterization of the effect of curing parameters of a UV light curing self-adhesive mask on the resulting feature resolution is reported. Instead of relying on the manufacturer recommended curing parameters which were vaguely described for specific UV curing units, it was found that measured energy density could be used to quantify a recommended cure that is independent of the curing unit. The best achievable pattern on borosilicate glass using RM and AJM was found and reported along with the erosion rates of uncured, cured RM during AJM. A new methodology was introduced to use multiple layers of the RM in order to increase the achievable feature aspect ratio. The results of the RM curing and multiple layer investigation were then used to fabricate a three dimensional flow focusing chip with a varying depth at the focusing junction. The chip was then sealed and tested to demonstrate its capabilities and potential in healthcare and biomedical applications. To the best knowledge of the author, this thesis is the first to report using a double layer RM to fabricate a microfluidic chip using AJM.

Study on the UV Curing Reactivity of Micro-Injection UV-Curing Molding

2018 ◽  
Vol 777 ◽  
pp. 65-69
Author(s):  
Jia Wei Li ◽  
Jian Yun He ◽  
Xi Dan Luo ◽  
Chang Song Zhao ◽  
Peng Cheng Xie ◽  
...  
Keyword(s):  
Uv Light ◽  
Uv Curing ◽  
Process Conditions ◽  
Uv Curable ◽  
Functional Monomers ◽  
Molding Method ◽  
Curing Reaction ◽  
Double Bond Conversion ◽  
Light Curing ◽  
Kinetics Of

In this paper, UV irradiation curing technology is used in the processing and manufacturing of micro structure parts and a micro-injection molding method of UV-curable molding was proposed to process microstructures. The special material for UV light curing injection of microstructural products was developed. The light curing reactivity of the micro injection light curing special material and its effect on the processing molding are studied. The kinetics of light curing reaction of UV curing injecting material were studied by online infrared spectroscopy (RT-IR). The contribution of mono functional monomers to the double bond conversion rate of microstructures is higher than that of high functional monomers. Under the same condition, the mono functional monomer can make the UV curing reaction more complete. Under the same process conditions, the rate of UV curing reaction of high functional monomers is higher than that of mono functional monomers.

Quality Control Parameters of Mandukarni Syrup - A classical memory enhancing dosage form

2017 ◽  
Vol 2 (4) ◽  
Author(s):  
Almas Tarannum ◽  
Prathviraj Puranik ◽  
Suma V. Mallya
Keyword(s):  
Quality Control ◽  
Refractive Index ◽  
Specific Gravity ◽  
Dosage Form ◽  
Reducing Sugar ◽  
Standard Protocol ◽  
Direct Impact ◽  
Control Parameters ◽  
Quality Control Parameters ◽  
Memory Enhancing

Ayurveda is the healing medicine. Dosha, Dhatu, Mala and Agni play important role in maintaining health of a person, but without equilibrium of Atma, Indriya and Manas they are helpless. Manas is one entity which is the controller of health. There are several herbs which have direct impact on Manas, among them Mandukaparni is one. Swarasa of Mandukaparni is highly effective, but it is not easily available for children. This study is intended to make Syrup form of Mandukaparni and evaluate its pharmacognostical parameters. According to the methodology refractive index, total solids, specific gravity, reducing and non Reducing sugar and HPTLC parameters were assessed. The results were found to be genuine fulfilling the standard protocol. This study is under taken to evaluate the pharmacognostic properties of Mandukaparni syrup.

Relation Between Refractive Index, Specific Gravity, and Total Solids of Tomato Juice, Puree, and Paste

1967 ◽  
Vol 50 (3) ◽  
pp. 690-700
Author(s):  
Frank C Lamb
Keyword(s):  
Refractive Index ◽  
Specific Gravity ◽  
Tomato Juice ◽  
Regression Equations ◽  
Total Solids ◽  
Pectic Enzymes ◽  
Tomato Paste ◽  
Aoac Method ◽  
Solids Content ◽  
Separate Regression

Abstract Total solids by drying, refractive index, and specific gravity were determined on about 375 commercial samples of tomato juice, puree, and paste. Refractive index was determined with and without dilution of tomato paste; pectic enzymes were used to aid filtration and centrifugation. A new specific gravity bottle was used. The new AOAC method for total solids was compared with the former AOAC method on 115 samples. Variations from previous tables relating refractive index and total solids were of little significance up to 20% solids but were increasingly greater as solids increased above 20%. Data obtained in these studies showed lower values for total solids than the old tables in most instances. Separate regression equations had to be calculated for the solids content of the diluted and undiluted samples. Total solids by the official AOAC method was the most precise of the methods used. However, specific gravity and refractive index were both found to have satisfactory degrees of precision

E EVALUASI MUTU MINYAK BUMI DENGAN DISTILASI TRUE BOILING POINT (TBP) BERDASARKAN PARAMETER UJI SIFAT FISIKA SEBAGAI BAHAN BAKU PRODUK KEROSIN DAN AVTUR

2019 ◽  
Vol 10 (01) ◽  
pp. 20-27
Author(s):  
Dian Kurnia Sari ◽  
Rian Ternando
Keyword(s):  
Refractive Index ◽  
Specific Gravity ◽  
Crude Oil ◽  
Boiling Point ◽  
Kinematic Viscosity ◽  
Freezing Point ◽  
Smoke Point ◽  
Flash Point ◽  
Primary Process ◽  
Copper Strip

Minyak bumi dievaluasi guna menentukan potensi minyak bumi sebagai bahan baku kilang minyak untuk menghasilkan fraksi yang dikehendaki. Evaluasi yang dilakukan meliputi pengujian sifat umum minyak bumi, klasifikasi minyak bumi dengan distilasi True Boiling Point (TBP) wide cut (pemotongan jarak lebar) serta analisis fraksi kerosin. Fraksi kerosin yang dihasilkan dari primary process dapat diolah menjadi bahan bakar rumah tangga (minyak  tanah) dan bahan bakar lampu penerangan. Selain itu fraksi kerosin juga dapat dioalah menjadi bahan bakar untuk pesawat terbang jenis jet (avtur). Avtur adalah kerosin yang dengan  spesifikasi yang diperketat, terutama mengenai titik uap dan titik beku. Untuk melakukan pengolahan pada minyak bumi perlu diketahui karakteristik dan spesifikasi minyak  bumi (bahan baku) yang akan diolah untuk mengetahui mutu dan manfaat minyak bumi tersebut. Salah satu parameter uji analisis minyak bumi yaitu parameter sifat fisika. Dari data distilasi TBP diperoleh persentase fraksi kerosin Crude Oil 99 PT HS sebesar 29 % vol sedangkan Crude Oil 165 PT RT sebesar 23 % vol. Berdasarkan analisis sifat fisika yang meliputi Specific Gravity, Refractive Index nD20, Freezing Point, Smoke Point, Flash Point “Abel”, Aniline Point, Copper Strip Corrosion, Kinematic Viscosity dan Characterization KUOP. Crude Oil 99 dan Crude Oil 165 memiliki mutu yang baik serta memenuhi spesifikasi produk kerosin maupun produk avtur.

The Study on Color Quality Attributes of IMR with PET on White Ink by UV Inkjet

2014 ◽  
Vol 1004-1005 ◽  
pp. 799-802 ◽  
Author(s):  
Chang Lang Chen ◽  
Yu Tung Chang ◽  
Sheng Hao Taso ◽  
Weichieh Hsu
Keyword(s):  
Inkjet Printing ◽  
Screen Printing ◽  
Quality Attributes ◽  
Gravure Printing ◽  
Printing Process ◽  
Color Quality ◽  
Study Results ◽  
Color Differences ◽  
Pet Film ◽  
Better Than

The In-Mold Roller is a revolutionary printing process by which objects are 3D decorated. Products decorated by In-Mold Roller are waterproof and protected from fading. What’s more, these kinds of decorations strongly increase the beauty, desirability and value of the objects. The In-Mold Roller is now using either of gravure printing and screen printing to print PET film. However, there are some problems with these two techniques. This research is to investigate potential usages of combining In-Mold Roller with digital UV inkjet printing in 3D decoration, e.g. in personalized printing services. Study results found that when the coverage and the resolution of inkjet printing become higher, the SIDs will become higher as well. When transferred to ABS, SIDs in each combination will increase. Each combination of inkjet conditions, with the isolation of white ink, color differences are less variant. TVIs of white ink decrease 30% to 40% halftone and display in “M” type. In print contrast, C and K colors of each combination are better than M and Y colors. After transferred into print contrast, each combination of PC will be higher about 2 to5. When transferred to ABS, color variances of each combination are not huge, and color differences are about 3to5.

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