Nitto-Denko Corporation

Junichi Moriyama

Yozo Nagai

Satoru Furuyama

Hiroyuki Iida

Satoshi Sakuma

Katsuya Kume

Hajime Yamamoto

Masaharu Asano

Toshimitsu Tachibana

Yasunari Maekawa

Tetsuya Yamaki

Yoshiki Ikeyama

Hidetoshi Itou

Kazuaki Mochida

Sunao Inoue

Hiroshi Koshikawa

Tomohisa Ishizaka

Ikuo Ishibori

Ken-ichi Yoshida

Yosuke Yuri

Takahiro Yuyama

Susumu Okumura

A water-proof air-permeable filter () includes: a resin film () having formed therein a plurality of through pores (); a treated layer () having hydrophobicity and oil repellency, and formed on at least one of both surfaces in the thickness direction of the resin film () such that the treated layer () has openings () at positions corresponding to the through pores (); and a loop-shaped double-sided tape () stuck to an edge region of one of both surfaces in the thickness direction of the resin film (), with the treated layer () interposed therebetween.

Water-proof air-permeable filter and use of the same

The method of the present disclosure is a method for producing a porous polymer film including: irradiating a strip-shaped polymer film with an ion beam while moving the polymer film transversely to the ion beam, so as to form a polymer film that has collided with ions in the beam; and chemically etching the formed polymer film so as to form openings and/or through holes corresponding to tracks left by the colliding ions in the polymer film. The ion beam () with which the polymer film is irradiated is obtained by folding a tail of an original beam () inwardly toward a center of the original beam by nonlinear focusing. The original beam is composed of ions accelerated in a cyclotron and has a cross-sectional intensity distribution profile in which an intensity is maximum at the center of the original beam and continuously decreases from the center toward the tail of the original beam, and the profile is an intensity distribution profile in a cross section perpendicular to a direction of the original beam.

Method for producing porous polymer film and porous polymer film

A water-proof air-permeable filter () includes: a resin film () having formed therein a plurality of through pores (); and a treated layer () having hydrophobicity and oil repellency, and formed on at least one of both surfaces in the thickness direction of the resin film () such that the treated layer () has openings () at positions corresponding to the through pores (). The through pores () each have a predetermined size larger than or equal to 0.01 &#x3bc;m and smaller than or equal to 10 &#x3bc;m, and are uniformly distributed such that a density of the through pores falls within specific limits included in a range from 10 to 1&#xd7;10pores/mm.

Provided is an air-permeable sheet imparted with oil repellency, having a surface coated with an oil-repellent agent. The oil-repellent agent contains a linear fluorine-containing hydrocarbon group represented by &#x2014;RCFCHCFor &#x2014;RCF, where Rand Rare each independently an alkylene group having 1 to 12 carbon atoms or a phenylene group. The air-permeable sheet is a resin sheet having air permeability in a thickness direction of the resin sheet, the resin sheet is a non-porous sheet having two or more through holes formed to extend in the thickness direction, and the through holes are straight holes extending straight through the resin sheet. This air-permeable sheet is imparted with oil repellency without significantly reducing its air permeability.

Air-permeable sheet imparted with oil repellency

A porous electrode sheet () includes a resin film () being transparent and having insulating properties, and a transparent electrode () placed on one face () of the resin film (). The resin film () is provided with a plurality of through holes () extending linearly from the one face () to the other face (). The transparent electrode () has openings () at positions corresponding respectively to the through holes (). The through holes () of the resin film () and the openings () of the transparent electrode () communicate with each other, and thereby form passages () penetrating the porous electrode sheet () in the thickness direction.

Porous electrode sheet, method for producing the same, and display device

The sheet for suction and fixation according to the invention is a sheet for suction and fixation, constituted by including at least a porous sheet and used for suction and fixation of a member to be sucked, and the sheet for suction and fixation has a structure of a plurality of layers comprising a porous sheet provided on at least one side of the porous sheet with a particle layer constituted by including plastic particles, wherein the surface roughness (Ra) of the particle layer is not greater than 0.5 &#x3bc;m. A sheet for suction and fixation, which is continuous and long and excellent in surface smoothness, and a method of producing the same, can thereby be provided.

Sheet for suction and fixation, and method of producing the same

The present invention provides: a protection member used for preventing a contact between a lens for focusing light on an optical information recording medium and the optical information recording medium upon optically recording or reproducing information on or from the optical information recording medium, the protection member including an ultrahigh molecular weight polyethylene porous film; and an optical pickup device having the protection member.

Protection member and optical pickup device using the same

An elastic pressure sheet that is good in durability against liquid crystals and the like and is good in slipperiness and a process of manufacturing a liquid crystal display plate using the same are disclosed. The elastic pressure sheet comprises an elastic layer having elastic restoring force; hot-melt adhesive layers formed on the both surfaces of the elastic layer; a barrier layer formed on the outer surface of each of the adhesive layers and capable of preventing bleeding of the hot-melt adhesive layer; and a porous layer comprising ultrahigh molecular weight polyethylene, formed on the outer surface of each of the barrier layers.

Elastic pressure sheet and process of manufacturing liquid crystal display plate

A method of renting fabric articles comprising sticking a bar code-printed sheet onto the fabric articles and repeatedly renting and washing the fabric articles under the management with the use of the bar codes, by which the bar codes can be read even after washing the fabric articles 100 times and thus the rental business can be smoothly performed. The method of renting fabric articles comprises sticking a data code-printed sheet onto the fabric articles and repeatedly renting and washing the fabric articles under the management with the use of the data codes, characterized in that the data code-printed sheets are those wherein the data code (2) is printed on an ink-receiver layer (1) which is a porous layer made of an ultra-high-molecular-weight polyethylene having a viscosity-average molecular weight of from 500,000 to 10,000,000 and having an average surface roughness Ra of 5 .mu.m or less and a degree of shrinkage under contact with air or in an aqueous alkali solution of pH 10 to 11 of 5% or less.

Growing community of inventors

Osaka, Japan

Junichi Moriyama