E.i. Dupont De Nemours and Company

Robert William Johnson

Hyunkook Shin

John D Bolt

Robert Vincent Canning, Jr

Barry Rubin

William John Gambogi, Jr

Michael Warren Ott

Robert V Canning

Douglas Ray Stilwell

Rajeev Lochan Gorowara

Richard Walker Browne

Michael H Evans

Torence John Trout, Jr

Robert D Smith-Gillespie

Edwin James Lightfoot

Adam Ben Starry

Pasi Taimela

Gopi Balakrishnan

William John Gambogi

A diffuse reflective article is provided including a diffuse reflector of light positioned within a structure defining an optical cavity. The diffuse reflector is a nonwoven sheet containing a plurality of inter-fiber and intra-fiber pores of optimal light scattering dimension. Also provided is an optical display, including: (i) a structure defining an optical cavity; (ii) a light source positioned within the optical cavity; (iii) a display panel through which light from the light source passes; and (iv) a diffuse reflector positioned within the optical cavity for reflecting light from the light source toward the display panel, wherein the diffuse reflector is a nonwoven sheet containing a plurality of inter-fiber and intra-fiber pores of optimal light scattering dimension.

Diffuse reflective article

An image analysis method to quantify visual showthrough of printed images on the reverse face of planar objects, such as paper. An illumination level is set using a white reference object. A white reference image is stored in a computer memory. An image of a planar object having a printed image on the reverse face is stored in a computer memory. A pixel by pixel ratio of the two images is calculated and a mean value of the ratios is calculated to characterize the visual showthrough. The measurements are substantially independent of both the illumination level and image shading.

Method and apparatus for quantifying visual showthrough of printed images on the reverse of planar objects

Coated titanium dioxide pigment having high UV absorption properties and use in polymer compositions, especially PVC for building and residential construction is described.

Titanium dioxide pigment and polymer compositions

A method for determining light scattering efficiency and a method to determine undertone of pigments or mixtures containing white pigments are described. The methods are based on measuring total transmittance of pigment slurries at a wavelength of at least 600 nm. Transmittance measurements can be used to calculate light scattering efficiencies and undertone which correlate with performance in end-use applications.

Method to determine light scattering efficiency of pigments

A method for determining light scattering efficiency and a method to determine undertone of pigments are described. The methods are based on measuring total transmittance of pigment slurries at a wavelength of at least 600 nm. Transmittance measurements can be used to calculate light scattering efficiencies and undertone which correlate with performance in end-use applications.

A process for enhancing the optical efficiency of TiO.sub.2 slurries is disclosed.

TiO.sub.2 slurry process

A stabilized molding composition comprising an admixture of a minor portion of a dispersion of polyamide in a carrier resin and a major portion of polyoxymethylene, wherein the melting or glass transition temperature of the polyamide is higher than the melting temperature of the polyoxymethylene, and a process for preparing these compositions.

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Kennett Square, PA, United States of America

Robert William Johnson