Mitsui Chemicals, Inc.

Murata Manufacturing Co., Ltd.

Shigeo Nishikawa

Mitsunobu Yoshida

Kazuhiro Tanimoto

Michio Eriguchi

Haruo Inoue

Kaoru Yorita

Masaki Shimizu

Masamichi Ando

Takanori Sueda

Yoko Shimada

Hideo Amemiya

Katsuki Onishi

Kouzo Ichikawa

Eiichi Sugihara

Masahiro Takedachi

Akira Uchiyama

Hidekazu Kano

Yoshiro Tajitsu

Yuichi Ito

Tamio Kawasumi

Ryuuji Haseyama

Satoshi Noma

Naohiro Yamada

Masahiko Hashiba

Katsuyuki Kajihara

Hiroshi Fukuda

The present invention provides: a piezoelectric substrate which includes a first piezoelectric body having an elongated shape and helically wound in one direction, and which does not include a core material, in which the first piezoelectric body includes a helical chiral polymer (A) having an optical activity; in which the length direction of the first piezoelectric body is substantially parallel to the main direction of orientation of the helical chiral polymer (A) included in the first piezoelectric body; and in which the first piezoelectric body has a degree of orientation F, as measured by X-ray diffraction according to the following Equation (a), within the range of 0.5 or more but less than 1.0:degree of orientation=(180&#xb0;&#x2212;&#x3b1;)/180&#xb0;&#x2003;&#x2003;(a)(in which &#x3b1; represents the half-value width of the peak derived from the orientation).

Piezoelectric substrate, piezoelectric woven fabric, piezoelectric knitted fabric, piezoelectric device, force sensor, and actuator

The breathable sheet of the present invention is comprised of a 4-methyl-1-pentene-based polymer or a resin composition containing the 4-methyl-1-pentene-based polymer as a main component. In addition, the breathable sheet of the present invention is preferably selected from the group consisting of a net, a mesh, a non-woven fabric, a woven fabric, and a perforated sheet.

Breathable sheet, laminate, and composite

Provided is a piezoelectric substrate including: an elongate conductor; and an elongate first piezoelectric material helically wound in one direction around the conductor, in which the first piezoelectric material includes an optically active helical chiral polymer (A), the lengthwise direction of the first piezoelectric material and the principal orientation direction of the helical chiral polymer (A) included in the first piezoelectric material are substantially parallel to each other, and the first piezoelectric material has an orientation degree of F. in a range of from 0.5 to less than 1.0, determined from X-ray diffraction measurement by the following Formula (a):orientation degree F.=(180&#xb0;&#x2212;&#x3b1;)/180&#xb0;&#x2003;&#x2003;(a)

Piezoelectric substrate, piezoelectric textile, piezoelectric fabric, piezoelectric device, force sensor, actuator, and biological information acquisition device

An electronic device with pressing input function has a substantially rectangular parallelepiped-shaped housing. A display panel with pressure sensor and an arithmetic circuit module are disposed in the housing. The display panel with pressure sensor is composed of a pressure sensor and a display panel. In the display panel, a front polarizing plate is disposed on a front face of a liquid crystal panel. In the pressure sensor, electrodes are formed on both respective flat plate faces of a piezoelectric film having birefringence. The pressure sensor is disposed between the liquid crystal panel and the front polarizing plate of the display panel, and a uniaxial drawing direction of the piezoelectric film is parallel to a polarizing direction of the front polarizing plate.

Display panel with pressure sensor and electronic device with pressing input function

A pressure-sensing device including a pressed component that has a contact surface to which pressure is applied by contact from a presser; a polymeric piezoelectric element that is disposed at an opposite side from the contact surface of the pressed component and that has a piezoelectric constant dof 1 pC/N or more as measured at 25&#xb0; C. using a stress-charge method; a curable resin layer that includes at least one selected from the group consisting of cold-setting resins, thermosetting resins, and actinic radiation-curable resins and that is in contact with at least part of a surface of the polymeric piezoelectric element; and an electrode that is in contact with at least part of a surface of the polymeric piezoelectric element or of a surface of the curable resin layer.

Pressure-sensing device and pressure-sensing touch panel

Provided is a display device containing a crystalline piezoelectric polymer layer having a helical chiral polymer (A) that has a weight average molecular weight of from 50,000 to 1,000,000 and has optical activity, an optical compensation layer satisfying the following expression (1), and a linear polarizer. In expression (1), Xc represents a degree of crystallinity (%) of the crystalline piezoelectric polymer layer obtained by a DSC method; MORc represents a standardized molecular orientation of the crystalline piezoelectric polymer layer measured by a microwave transmission molecular orientation meter when a reference thickness is 50 &#x3bc;m; d represents a thickness (&#x3bc;m) of the crystalline piezoelectric polymer layer; and Rth represents a phase difference (nm) in a thickness direction of the optical compensation layer at a wavelength of 550 nm.|0.06&#xd7;|&#x2264;500&#x2003;&#x2003;Expression (1):

Display device and laminated optical film

The invention provides a pressure detecting device containing a pressurized member having a contact surface that is subjected to pressure due to contact with a pressurizing means; and a piezoelectric member that is arranged facing the pressurized member and that includes a polymeric piezoelectric material having a piezoelectric constant dof 1 pm/V or more as measured by a displacement method at 25&#xb0; C., and a ratio IEb/IEa between a product IEb of a cross-sectional secondary moment Ib and a Young's modulus Eb of the pressurized member, and a product IEa of a cross-sectional secondary moment Ia and a Young's modulus Ea of the piezoelectric member, is in a range of from 10to 10.

Pressure detecting device and touch panel

A piezoelectric device is provided that includes a polymer piezoelectric material having at least one film-like layer; a first electric conductor provided on a principal surface of the polymer piezoelectric material; a second electric conductor provided on a surface of the polymer piezoelectric material at an opposite side from the first electric conductor on the principal surface; a first end surface electric conductor provided on one end surface in a width direction of the polymer piezoelectric material and disposed so as to be conductively connected to the first electric conductor and so as not to be in contact with the second electric conductor; and a second end surface electric conductor provided on any other end surface that is not the one end surface of the polymer piezoelectric material and disposed in a defined manner.

Piezoelectric device and process for producing piezoelectric device

Provided is a process for producing a polymeric piezoelectric material including a first step of heating a sheet in an amorphous state containing the helical chiral polymer to obtain a pre-crystallized sheet, and a second step of stretching the pre-crystallized sheet in biaxial directions, wherein the polymeric piezoelectric material includes a helical chiral polymer having a weight-average molecular weight of from 50,000 to 1,000,000 and having optical activity, wherein a crystallinity of the material measured by a DSC method is from 20% to 80%, and a product of a standardized molecular orientation MORc measured by a microwave transmission type molecular orientation meter based on a reference thickness of 50 &#x3bc;m and the crystallinity is from 25 to 250.

Polymeric piezoelectric material, and process for producing the same

A polymeric piezoelectric material is provided that includes an aliphatic polyester (A) with a weight-average molecular weight of from 50,000 to 1,000,000 and having optical activity, and a stabilizing agent (B) with a weight-average molecular weight of from 200 to 60,000 having at least one kind of functional group selected from the group consisting of a carbodiimide group, an epoxy group and an isocyanate group, wherein the crystallinity of the material obtained by a DSC method is from 20% to 80%, a content of the stabilizing agent (B) is from 0.01 part by mass to 10 parts by mass with respect to 100 parts by mass of the aliphatic polyester (A), and internal haze with respect to visible light is 50% or less, as well as a process for producing the same.

Polymeric piezoelectric material and process for producing the same

A polymeric piezoelectric material having an aliphatic polyester (A) with a weight-average molecular weight of from 50,000 to 1,000,000 and having optical activity, and a stabilizing agent (B) with a weight-average molecular weight of from 200 to 60,000 having at least one kind of functional group selected from the group consisting of a carbodiimide group, an epoxy group and an isocyanate group, wherein the crystallinity of the material obtained by a DSC method is from 20% to 80%, and a content of the stabilizing agent (B) is from 0.01 part by mass to 10 parts by mass with respect to 100 parts by mass of the aliphatic polyester (A), as well as a process for producing the same, is provided.

Provided are a shape-retaining film which has excellent adhesion to inks and other functional layers while retaining high shape-retaining properties and a process for producing the shape-retaining film. The shape-retaining film comprises an ethylene homopolymer or an ethylene/a-olefin copolymer having a C3-6 a-olefin content less than 2 wt. %, the ethylene homopolymer or copolymer having a density of 950 kg/m3 or higher and a weight-average molecular weight (Mw)/number-average molecular weight (Mn) ratio of 5-20. The film has a tensile elasticity modulus of 6-50 GPa and has either an angle of recovery from 90 bending of 8 or less or an angle of recovery from 180 bending of 65 or less.

Shape-retaining film, process for producing same, laminate for packaging, packaging material and process for producing same, shape-retaining fiber, and anisotropic heat-conductive film

A process for producing modified thermoplastic resin by subjecting a thermoplastic resin to a modifying reaction in a molten state, comprising performing the modifying reaction using carbon dioxide as the reaction medium, wherein carbon dioxide is used in a proportion of 2-200 parts by weight per 100 parts by weight of the thermoplastic resin, whereby the efficiency and the uniformity of the reaction can be increased to a high extent while attaining considerable decrease in the remaining amount of the unreacted components in the resulting modified thermoplastic resin without having recourse to the use of an organic reaction solvent, so that the production can be realized easily at a low cost in an efficient manner.

Process for production of modified thermoplastic resin and modified thermoplastic resins

The method of the present invention for producing a urethane-based thermoplastic elastomer composition foam comprises the steps of: The present invention can produce the urethane-based thermoplastic elastomer foam of stable quality over a range from low foamed product to highly foamed product by adding a given quantity of carbon dioxide in the molten urethane-based thermoplastic elastomer quantitatively and stably. It can also produce the foam excellent in flexibility, thermal insulation and surface appearances. It is also excellent in safety, because of use of carbon dioxide in place of the common foaming agent of fluorochlorohydrocarbon or butane, thus causing no air pollution or destruction of the ozone layer.

Foam of thermoplastic urethane elastomer composition and process for producing the foam

This invention provides a method for stably adding a predetermined amount of supercritical carbon dioxide at a fixed delivery rate into a forming machine and also a process for producing an expanded thermoplastic resin product by making use of the addition method. Carbon dioxide is charged from a liquefied carbon dioxide cylinder (,) into a predetermined amount deliverable pump (,) while allowing the carbon dioxide to remain in a liquefied state. When the carbon dioxide is pressurized and delivered by the predetermined amount deliverable pump (,), a delivery pressure of the carbon dioxide is controlled at an optional pressure within a range of from a critical pressure (7.4 MPa) of carbon dioxide to 40 MPa to deliver the carbon dioxide without any fluctuation of the amount of the delivery by setting up the pressure of a pressure control valve (,). The carbon dioxide is heated to a critical temperature (31&deg; C.) of carbon dioxide or higher to convert it into supercritical carbon dioxide. This supercritical carbon dioxide is then added to a molten thermoplastic resin in the forming machine (,).

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Chiba, Japan

Shigeo Nishikawa