Asahi Kasei Kabushiki Kaisha

Asahi Kasei E-materials Corporation

Yasuyuki Kawazu

Yusuke Sato

Hiroshi Yamaki

Takuji Namatame

Takashi Ono

Tetsuo Nakamoto

Masaru Sugiyama

Ryota Nakayama

Yoshinori Fujino

Masaharu Sugimura

Polyamide pre-expanded particles of this disclosure have a peak temperature of a maximum endothermic peak of 150-275° C. on a DSC curve obtained while being heated from 30° C. to 280° C. at a heating rate of 10° C./min using a DSC. The width of the peak is 30-80° C. when a straight line approximating the DSC curve on a high-temperature side relative to the peak after an end of melting is used as a baseline. The width corresponds to a difference between an extrapolated melting start temperature which is a temperature at an intersection point between a tangent line at an inflection point of the peak on a low-temperature side and the baseline, and an extrapolated melting end temperature which is a temperature at an intersection point between a tangent line at an inflection point of the peak on a high-temperature side and the baseline.

Polyamide pre-expanded particles, and polyamide foam molded article and method of producing the same

Provided are a foam molded product and a method of producing the same. The foam molded product is a molded product containing a resin and including a surface layer, a compressive deformation layer, and a foam layer. The thickness of the surface layer is 0.1 mm to 5.0 mm. The compressive deformation layer is located between the surface layer and the foam layer. Foam particles forming the compressive deformation layer have an average H/L of 0.5 or less (H: length in compression direction; L: length in perpendicular direction relative to compression direction). Foam particles forming the foam layer have an expansion ratio of not less than 3.0 times and less than 30 times.

Foam molded product and method of producing same

A wire grid polarizing plate () has a substrate () having a concavo-convex structure extending in a particular direction on its surface, and a conductive material () provided to be distributed on one side surface () of a convex portion () of the concavo-convex structure. Further, in the wire grid polarizing plate (), in a cross-sectional view in the perpendicular direction to the extension direction of the concavo-convex structure, a pitch Pthat is a distance between two adjacent convex portions () is set at 120 nm or less, and a convex-portion height (H) that is a difference in height between a highest portion () of the convex portion () and a lowest portion () of a concave portion () is set at 0.8 time to 1.3 time the pitch P. With the wire grid polarizing plate () in a liquid crystal display device, high image quality can be achieved.

Wire grid polarizing plate and projection type image display device

A dielectric layeris formed on a region including grid-shaped convex portionsof a resin substratehaving the grid-shaped convex portionswith pitches of 80 nm to 120 nm on its surface, and metal wiresare formed on the dielectric layer. It is thereby possible to obtain a wire grid polarizer having a microstructural concavo-convex grid with pitches of the level of 120 nm or less that has not been implemented.

Method of manufacturing a wire grid polarizer

A wire grid polarizer has mainly a resin substratehaving grid-shaped convex portions, a dielectric layerprovided to cover the grid-shaped convex portionsof the resin substrateand at least part of side facesof the portions, and metal wiresprovided on the dielectric layer. The wire grid polarizer has a microstructural concavo-convex grid structure having grid-shaped convex portions, is not limited in structure, and has both the excellent degree of polarization and excellent transmittance over a wide range in the visible region.

Wire grid polarizer and liquid crystal display device using the same

A wire grid polarizer has a resin substrate having grid-shaped convex portions, a dielectric layer provided to cover the grid-shaped convex portions of the resin substrate and at least part of side faces of the portions, and metal wires provided on the dielectric layer. The wire grid polarizer has a microstructural concavo-convex grid structure having grid-shaped convex portions, is not limited in structure, and has both the excellent degree of polarization and excellent transmittance over a wide range in the visible region.

Growing community of inventors

Tokyo, Japan

Yasuyuki Kawazu