Research in Compositions and Coloration Performance of Polyurethane Ink Absorption Coating

2010 ◽  
Vol 174 ◽  
pp. 498-501
Author(s):  
Xu Wei Hu ◽  
Lu Hai Li ◽  
Sheng Min Zhao ◽  
Peng Du ◽  
Wen Zhao ◽  
...  
Keyword(s):  
High Speed ◽  
Hard Segment ◽  
Water Resistance ◽  
Image Resolution ◽  
Drying Rate ◽  
Color Reproduction ◽  
Solid Density ◽  
Nano Alumina ◽  
Water Based ◽  
Different Content

Water-based polyurethane forms continuous and dense film after fully drying. Ink is lowly absorbed by PU film, affecting drying rate and color reproduction. In order to improve the absorption of ink on PU film, PU/nano alumina compound was prepared by adding nano alumina in PU and stirring at high speed. PU ink absorption coating was got by being coated on the substrate. The influences of different content of nano alumina to transmittance of coating and solid density of color blocks were researched. The influences of soft and hard segment of PU to image resolution and water resistance were also researched. It can be seen that transmittance reduces when content of nano alumina increases. Droplets spread less when using PU of hard segment and image resolution and solid density are also higher. At the same time, water resistance of solid blocks is much better when printed on PU of hard segment.

Study on Application Performance of Water-Based Pigment Ink on Uncoated Paper

2011 ◽  
Vol 380 ◽  
pp. 52-55
Author(s):  
Wen Bo Li ◽  
Li Xin Mo ◽  
Lu Hai Li ◽  
Xu Wei Hu ◽  
Xian Leng ◽  
...  
Keyword(s):  
Contact Angle ◽  
Water Resistance ◽  
Drying Rate ◽  
Color Gamut ◽  
Application Performance ◽  
Water Based ◽  
Color Fading ◽  
Color Density ◽  
Pigment Ink ◽  
Printing Ink

The performances of three kinds of water-based pigment inks were compared and studied, which include self-made ink, original printing ink and compatible ink. Art paper, matte paper and white card paper were used as the substrates. Testing the contact angle of ink droplets, the spreading, wetting, and drying rate of inks were investigated. The color density and CIE L*a*b* values of the printed samples were measured, to evaluate the hue error and color gamut. The water resistance was studied with corresponding experiments. The result indicates: self-made water-based pigment ink has the smallest contact angle on coated paper, showing a faster drying rate. Its color gamut is similar to the original printing ink on art paper, and the hue error is low. Through the water resistance test, the color density measured on art paper and matte paper had no changes, without color dissolving and color fading, showing good water resistance applicability.

scholarly journals On-CMOS Image Sensor Processing for Lane Detection

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3713
Author(s):  
Soyeon Lee ◽  
Bohyeok Jeong ◽  
Keunyeol Park ◽  
Minkyu Song ◽  
Soo Youn Kim
Keyword(s):  
Edge Detection ◽  
High Speed ◽  
Cmos Image Sensor ◽  
Image Sensor ◽  
Image Resolution ◽  
Lane Detection ◽  
Frame Rate ◽  
Total Power ◽  
Detection Accuracy ◽  
Total Power Consumption

This paper presents a CMOS image sensor (CIS) with built-in lane detection computing circuits for automotive applications. We propose on-CIS processing with an edge detection mask used in the readout circuit of the conventional CIS structure for high-speed lane detection. Furthermore, the edge detection mask can detect the edges of slanting lanes to improve accuracy. A prototype of the proposed CIS was fabricated using a 110 nm CIS process. It has an image resolution of 160 (H) × 120 (V) and a frame rate of 113, and it occupies an area of 5900 μm × 5240 μm. A comparison of its lane detection accuracy with that of existing edge detection algorithms shows that it achieves an acceptable accuracy. Moreover, the total power consumption of the proposed CIS is 9.7 mW at pixel, analog, and digital supply voltages of 3.3, 3.3, and 1.5 V, respectively.

Synthesis of Emulsion for Water-Based Pigment Ink Jet

2011 ◽  
Vol 380 ◽  
pp. 81-84
Author(s):  
Li Ming Zhang ◽  
Xiu Lan Xin ◽  
Wei Jiang
Keyword(s):  
Particle Size ◽  
Water Resistance ◽  
Average Particle Size ◽  
Average Particle ◽  
Scanning Calorimetry ◽  
Reactive Surfactant ◽  
Potential Value ◽  
Ink Jet ◽  
Water Based ◽  
Pigment Ink

The water-based pigment ink jet emulsion whose particle size was less than 100nm was synthesized by the polymerization of methyl methacrylate, butyl acrylate and ethylhexyl acrylate, and anionic reactive surfactant and nonionic surfactant were used as the emulsifiers. The effects of particle size and water resistance were studied. The glass transition temperature was tested by differential scanning calorimetry. The average particle size of emulsion was range from 60nm to70nm, zeta potential value was less than -60mv; viscosity was 3.5mps; water absorption was 5.9%.

Printability Analysis of Compostable Films by Flexographic Water Based Ink

2020 ◽  
Vol 843 ◽  
pp. 26-32
Author(s):  
Aran Hansuebsai ◽  
Samatcha Nawakitwong
Keyword(s):  
Surface Roughness ◽  
Quality Parameters ◽  
Image Resolution ◽  
Printing Press ◽  
Print Quality ◽  
Tone Reproduction ◽  
Water Based ◽  
Flexographic Printing ◽  
Set Up ◽  
Printing Speed

This research analyzed the printability of compostable films commercialized in the Thai market such as PLA/PBAT and PBAT/starch; and to comply with EN 13432 standard by using flexographic water based ink. A narrow web flexographic printing press was set up and opperated. Print quality parameters such as optical density, tone reproduction, print contrast and print uniformity were investigated. Results showed that these compostable films were hydrophobic in nature, in combination with fracture and voids of substrates’ surface. Even the substrates could be printed relatively well but showed poor ink adhesion. Surface treatment, therefore, was necessary, but having limitation. Anilox line screen 700 lpi and printing speed at 30 m/min were preferable to achieve the optimum tone reproduction and print contrast. This was based on the image resolution of 133 lpi and corona dosage at 500 watt-min/m2. Images of printed samples from SEM and SPM indicated that the fracture surface and void of films could lead to decrease their printability. It was found that starch blend gave better results as being a filler of the surface roughness of the substrate..

Study on Polyurethane-Acrylic Hybrid Emulsion Applying to Water-Based Ink

2012 ◽  
Vol 182-183 ◽  
pp. 3-7 ◽  
Author(s):  
Jing Lei Tai ◽  
Guang Xue Chen ◽  
Qi Feng Chen ◽  
Bao Ling Tang
Keyword(s):  
Particle Size ◽  
Ir Spectra ◽  
Water Resistance ◽  
Alkyd Resins ◽  
Polyurethane Dispersion ◽  
Water Based ◽  
Color Density

Polyurethane-acrylic composite emulsion was synthesized by swelling polymerization with aqueous polyurethane dispersion as seed, and acrylic as monomers. The obtained polyurethane-acrylic (PUA) composite emulsion were characterized by means of IR spectra, and the results showed that the obtained emulsion was hybrid emulsion of polyurethane and acrylic, which had smaller particle size and higher viscosity and was more suitable for the preparation of ink. The obtained water-based PUA emulsion and alkyd resins were used as ink binder. The obtained water-based ink had good water resistance, color density, gloss and friction fastness.

Study on Dispersion and Performance of Yellow Lake

2011 ◽  
Vol 233-235 ◽  
pp. 1246-1251
Author(s):  
Xian Leng ◽  
Lu Hai Li ◽  
Xu Wei Hu ◽  
Hua Fang ◽  
Shu Kun Li ◽  
...  
Keyword(s):  
Particle Size ◽  
Disperse System ◽  
High Speed ◽  
Reflectance Spectroscopy ◽  
Deionized Water ◽  
Disperse Systems ◽  
Safe Level ◽  
Water Based ◽  
Color Density ◽  
And Performance

In order to study the dispersion and performance of tartrazine aluminum lake, 7 kinds of water-based resins are used to form disperse system. These systems are enviroment friendly (low VOC) and use edible yellow lake as colorant. If proper adjustment is added, these disperse systems can be made into ink and paint. The application field should be printing or coating on all the food or drug packages, toys and decorate materials, which will improve social safe level. Colorant, resin, wetting agent, co-solvent, emulsifier, and deionized water are mixed at certain ratio and pre-dispersed for 15min, then dispersed in GJ-2S high speed sanding mill for 3h. Size distribution, PDI, color characteristics (reflectance spectroscopy and color density), glossiness, abrasion performance, and stability are studied. Results demonstrate particle size of disperse system is 338.1~595.3nm (PDI<0.3) and changed to 428.6~551.2nm after 5 days or so. Reflectance spectroscopy is close to PANTONE standard yellow. Glossiness is referred as Gs(60°)≥32°. Viscosity is 0.2~2Pa·S. Relative stable disperse system is prepared.

Study on Paper Electromagnetic Drying Rate

2013 ◽  
Vol 680 ◽  
pp. 356-359
Author(s):  
Zheng Shun Wang ◽  
Zhao Hui Zhen
Keyword(s):  
High Speed ◽  
Energy Crisis ◽  
Drying Rate ◽  
Paper Machine ◽  
Paper Drying ◽  
Developmental Potential ◽  
Toilet Paper ◽  
Drying Technology ◽  
Steam Drying ◽  
Special Meaning

Paper electromagnetic drying technology is a new paper drying technology different from traditional steam drying. Today, environmental pressure deteriorating, energy crisis approaching, doing researches on paper electromagnetic drying technology has a special meaning, especially to high speed toilet paper machine which is truly needed and has a vast developmental potential. This thesis is based on electromagnetic dryer and steam dryer study. And the changes measured in the experiment at diverse temperatures and quantities in the experiment has shown a higher efficiency of electromagnetic drying technology than conventional steam drying technology.

scholarly journals Monitoring Dynamic Structural Tests Using Image Deblurring Techniques

2013 ◽  
Vol 569-570 ◽  
pp. 932-939 ◽  
Author(s):  
David M.J. McCarthy ◽  
Jim H. Chandler ◽  
Alessandro Palmeri
Keyword(s):  
Image Processing ◽  
Real Time ◽  
High Speed ◽  
Image Resolution ◽  
Test Element ◽  
Small Scale ◽  
Measuring Instruments ◽  
Imaging Results ◽  
Blurred Image ◽  
Structural Tests

Photogrammetric techniques have demonstrated their suitability for monitoring static structural tests. Advantages include scalability, reduced cost, and three dimensional monitoring of very high numbers of points without direct contact with the test element. Commercial measuring instruments now exist which use this approach. Dynamic testing is becoming a convenient approach for long-term structural health monitoring. If image based methods could be applied to the dynamic case, then the above advantages could prove beneficial. Past work has been successful where the vibration has either large amplitude or low frequency, as even specialist imaging sensors are limited by an inherent compromise between image resolution and imaging frequency. Judgement in sensor selection is therefore critical. Monitoring of structures in real-time is possible only at a reduced resolution, and although imaging and computer processing hardware continuously improves, so the accuracy demands of researchers and engineers increase. A new approach to measuring vibration is introduced here, whereby a long-exposure photograph is used to capture a blurred image of the vibrating structure. The high resolution blurred image showing the whole vibration interval is measured with no need for high-speed imaging. Results are presented for a series of small-scale laboratory models, as well as a larger scale test, which demonstrate the flexibility of the proposed technique. Different image processing strategies are presented and compared, as well as the effects of exposure, aperture and sensitivity selection. Image processing time appears much faster, increasing suitability for real-time monitoring.

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