Dai Nippon Printing Co., Ltd.

Jfe Steel Corporation

Kentaro Hata

Masayuki Tsunekawa

Shubou Taya

Ryohei Miyata

Kazuhiro Watanabe

Akira Matsuzaki

Hiroki Nakagawa

Masataka Nakashima

Shinji Otsuka

Takahisa Nomura

Takanori Hamada

Kazuaki Tsuchimoto

A steel sheet mainly suitable for strength members of automobiles or building materials, which has a tensile strength of 1,180 MPa or more, and which is excellent in delayed fracture resistance and primary rust prevention performance. The steel sheet includes a coating, placed on a surface of a cold-rolled steel sheet with a tensile strength of 1,180 MPa or more, containing one or more metalates selected from molybdates and tungstates and a P compound. The sum of the coating weights of the metalates in terms of Mo and W is 10 mg/mto 1,000 mg/mand is preferably 50 mg/mto 1,000 mg/m. The coating weight of the P compound in terms of P is 10 mg/mto 1,000 mg/m.

High-strength cold-rolled steel sheet

Provided is an optical filmincluding a light-transmitting base materialand a light-transmitting functional layerprovided on one surface of the light-transmitting base material, wherein the optical filmhas a spectral transmittance of less than 1% at a wavelength of 380 nm, a spectral transmittance of 10% or more and less than 60% at a wavelength of 410 nm, and a spectral transmittance of 70% or more at a wavelength of 440 nm, and wherein the light-transmitting functional layerhas a film thickness of 9 &#x3bc;m or less.

Optical film, polarization plate, and image display device

It is intended to provide a writing sheet for a touch panel pen which can offer favorable writing feeling. The present invention provides a writing sheet for a touch panel pen (A) given below, the writing sheet having a surface whose maximum peak height Rp of a roughness curve and maximum valley depth Rv of the roughness curve defined in JIS B0601: 2001 satisfy the following conditions (A1) and (A2), and whose average wavelength &#x3bb;a calculated according to the following expression (i) from average tilt angle &#x3b8;a and arithmetic average roughness Ra defined in JIS B0601: 2001 satisfies the following condition (A3): 2.0 &#x3bc;m&#x2264;Rp&#x2264;8.0 &#x3bc;m (A1), 0.8 &#x3bc;m&#x2264;Rv&#x2264;6.0 &#x3bc;m (A2), 45 &#x3bc;m&#x2264;&#x3bb;a&#x2264;300 &#x3bc;m (A3), and &#x3bb;a=2&#x3c0;&#xd7;(Ra/tan(&#x3b8;a)) (i), &#x3c;touch panel pen (A)&#x3e; the touch panel pen having an angled part in at least a portion of a tip region, wherein a volumetric change of the tip region upon application of a vertical load of 100 gf is 1.0% or less.

Writing sheet for touch panel pen, touch panel, touch panel system, display device, and method for selecting writing sheet for touch panel pen

Growing community of inventors

Tokyo, Japan

Kentaro Hata