Opacity particle size. Effect of FCC Catalyst Fines Particle Distribution on Stack Opac. Effect of FCC Catalyst Fines Particle Distribution on Stack Opacity By Ronald G.
McClung This article is the third in a series dealing with quantification of FCC physical property effects on emissions measurements. The two previous Catalyst Reports dealt with stack emissions as affected by density in cyclone operation, and opacity as affected by fresh catalyst density and attrition index. This Catalyst Report deals with the much more complex issue of fines particle size distribution effect on stack opacity. Background In the previous Catalyst Report, the attrition index as measured by two different methods was shown to have the single largest impact on opacity measurement for a fixed particle size distribution (PSD). The particle sizes most adversely impacting opacity are in the 0.2 to 1 micron range as illustrated in Figure 1 for a commercial fines sample of average particle size 9.2 microns.
Opacity Calculation of PSD Effect Model Input Data Light Extinction Coefficient can be calculated. 1. Effect of Particle Shape of White Pigments on Opacity Acicular Z. Industrial & Engineering Chemistry - Effect of Particle Shape of. Color Center - Color Handbook - Opacity. Hiding power is the ability of a pigmented coating to obliterate the surface.
It is dependent on the ability of the film to absorb and scatter light. Naturally, the thickness of the film and the concentration of the pigment play a fundamental role. The color is also important. Figure 1: Hiding power Dark, saturated colors, such as blacks and deep blues, absorb most light falling upon them, whereas yellows do not. A key factor in the opacity of a pigment is its refractive index (RI), which measures the ability of a substance to bend light. Inorganic pigments have a high refractive index and organic pigments have much lower values. Titanium Dioxide in Coatings - White Pigment - Opacifying Center. Titanium Dioxide (TiO2) is the most important and widely used white pigment in the coatings industry.
DuPont™ TiO2 efficiently scatters visible light, thereby imparting whiteness, brightness and opacity. DuPont™ TiO2 is used to opacify paint films by diffusely reflecting light. White pigment scatters or bends light strongly and causes this reflection. All visible light will strike the white pigment and be reflected, thus the film will appear opaque, white and bright. DuPont™ TiO2 maximizes hiding power, improves tint strength, increases durability, and ensures batch-to-batch uniformity. DuPont has the technology you need, ranking first among titanium dioxide manufacturers in production capacity, product quality and technical assistance. Calcium carbonate hiding power curve. Air as a Dispersion Medium - Product R&D. Calcium Carbonate Extender Pigments - Industrial & Engineering C. Nonwoven pad cover with fluid masking properties - Patent 480149.
This invention relates to bodyside liner material for products for absorbing human exudate.
It particularly relates to materials for the bodyside liners of sanitary napkins. The formation of absorbent garments for use as diapers, incontinent garments or feminine care products has generally involved the combination of an impermeable backing material, a bodyside permeable member and an absorbent placed therebetween. The body exudate placed upon the pad is intended to pass through the liquid permeable layer and be absorbed by the absorbent. The liquid impermeable backing material prevents the exudate from passing through the pad and staining the clothes of the wearer. It has been found that the consumer would prefer not to look at the exudate absorbed by the pad. It has been proposed the perforated film materials be utilized for the bodyside liners of feminine care pads and diaper garments. Spunbonded materials have been used as cover materials for pads for absorption of human exudate. The material attributes of paints. In general, within the same type of pigment, smaller particle size should produce a higher tinting strength, but the sedimentation test is not entirely consistent with the tinting test paintouts (above).
The material attributes of paints. The material attributes of paints. In general, within the same type of pigment, smaller particle size should produce a higher tinting strength, but the sedimentation test is not entirely consistent with the tinting test paintouts (above).
The ranking here is (1) M. Graham, (2) Holbein, (3) Daniel Smith, (4) Rowney Artists, (5) Winsor & Newton, (6) DaVinci; in the tinting test it was (1) Rowney Artists, (2) M. Graham, (3) Daniel Smith, (4) Winsor & Newton, (5) Holbein, (6) DaVinci. Combining the two ranks gives: (3) M. Graham, (5) Rowney Artists, (6) Daniel Smith, (7) Holbein, (9) Winsor & Newton, (12) DaVinci. Be sure to do the sedimentation tests in clear glass containers. Dissolving Test. Set out separate small, white porcelain or plastic containers for each paint to test. Colormaking attributes. This concluding section looks at the relationships among lightness, saturation and chroma in terms of traditional painting practice.
How to Judge Chroma. To judge chroma or saturation accurately, the artist becomes familiar with it in qualitative terms. The trick is to use different perceptual tests for three levels of chromatic appearance. • At one extreme — grayed, dull, near neutral or achromatic colors — the color is difficult to name as a hue. Unsaturated colors are mixtures of many different wavelengths of light, so the color does not have a narrow, precise location within the visible spectrum.
. • At the opposite extreme, when the chroma is very intense, then the surface hue is quite specific and the best visual cue is how much the color appears to glow, in comparison to a gray of equal lightness. ScienceDirect - Progress in Organic Coatings : Development of a. Calcium carbonate hiding power curve. Unnamed. Blackinton.pdf (application/pdf Object) Calcium carbonate hiding power curve. TB_1204.pdf (application/pdf Object) Calcium carbonate hiding power curve optimum particle size - Goo. Calcium Carbonate Extender Pigments - Industrial & Engineering C. Multi-component pigment slurry and method of making the same - U. Patent References Clay slurries Patent #: 4017324 Issued on: 04/12/1977 Inventor: Eggers Clay pigment for coating paper Patent #: 4241142 Issued on: 12/23/1980 Inventor: Kaliski , et al.
High solids blended kaolin clay slurry Patent #: 4888315 Issued on: 12/19/1989 Inventor: Bowman, et al. Pigment system for paints Patent #: 5112402 Issued on: 05/12/1992 Inventor: Freeman, et al. Emerald: Article Request - The ABC's of white hiding power. Calcium carbonate hiding power curve optimum particle size - Goo. Ps.pdf (application/pdf Object) SpringerLink - Journal Article. PL_B_Polymers_Light_Science.pdf (application/pdf Object) Emerald: Article Request - The ABC's of white hiding power.