Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Hiroto Sumida

Takahiro Kurokawa

Kazunori Ishikawa

Takatoshi Mitsushima

Koji Motomura

Yoshiaki Tominaga

Mitsuhiro Takahashi

Mikio Takezawa

Takahiko Murata

Takayoshi Yamaguchi

Kunio Tanaka

Taichi Nakamura

Masahide Yokoyama

Hiroyuki Tsuji

Keiji Fujiwara

Toshihiko Nagaya

Tomonori Fujita

Masanobu Miyata

There is provided a filter which includes a fiber layer and an adsorbent. The fiber layer includes fiber. The adsorbent is held in the fiber and adsorbs a chemical substance. The filter is divided into a plurality of sections by a fold. Each of the plurality of sections includes a first end portion positioned along the fold, a center portion adjacent to the first end portion, and a second end portion which counterposes the first end portion with the center portion interposed. The density of the adsorbent at the center portion is greater than the density of the adsorbent at the first end portion and at the second end portion.

Filter

There is provided a stacked body which includes a porous base layer, a porous charged layer, a very fine-fiber layer, and an adsorbent. The base layer is configured with base fiber. The charged layer is configured with charged fiber. The very fine-fiber layer is interposed between the base layer and the charged layer and includes very fine fiber. The adsorbent is held in the very fine fiber and adsorbs a chemical substance. An average fiber diameter of the charged fiber is greater than an average fiber diameter of the very fine fiber.

Stacked body

A nonwoven fabric contains a plurality of fibers having average fiber diameter Din a range from 10 nm to 3 &#x3bc;m, inclusive. The nonwoven fabric has a plurality of fusion portions among the plurality of fibers. The nonwoven fabric has a first principal surface and a second principal surface on an opposite side to the first principal surface. Average number Nh of the fusion portions observed per 500 &#x3bc;mon the first principal surface is six or more.

Nonwoven fabric, and dust collecting filter, medium of microorganism or biological tissue, and cosmetic article, each having the same

A laminated nonwoven fabric includes a first nonwoven fabric that comprises first fibers, and a second nonwoven fabric that comprises second fibers. The second nonwoven fabric is laminated on the first nonwoven fabric. An average fiber diameter Dof the first fibers and an average fiber diameter Dof the second fibers satisfy a relation of D&#x3e;D. In viewed from a side of a principal surface of the second nonwoven fabric being not opposed to the first nonwoven fabric, a total area of first portions of the second fibers superimposed on the first fibers and existing on the nearer side than the first fibers is larger than a total area of second portions of the second fibers existing and superimposed on voids S of the first nonwoven fabric formed of the first fibers.

Laminated nonwoven fabric and air purifier

A laminated nonwoven fabric includes a first nonwoven fabric containing first fibers, a second nonwoven fabric containing second fibers, a third nonwoven fabric containing third fibers, and an adhesive. The second nonwoven fabric is laminated on the first nonwoven fabric, and the third nonwoven fabric is laminated on the second nonwoven fabric on an opposite side with respect to the first nonwoven fabric. The adhesive is disposed between the first nonwoven fabric and the third nonwoven fabric. An average fiber diameter of the second fibers is equal to or less than 3 &#x3bc;m, and is smaller than an average fiber diameter of the first fibers. The third nonwoven fabric has a protrusion including a part of the third fibers entangled with each other on a surface facing the second nonwoven fabric. At least a part of the adhesive is disposed between the protrusion and the first nonwoven fabric.

A laminated nonwoven fabric (NF) includes a first NF containing first fibers and a second NF containing second fibers and laminated on the first NF, and has a cut-off edge at an end thereof. An average diameter of the first fibers is larger than that of the second fibers not more than 3 &#x3bc;m. 50% by mass to 70% by mass, inclusive, of the second fibers satisfy x&#x2265;y, and 5% by mass to 30% by mass, inclusive, thereof satisfy x&#x3c;y/2. 'x' is a vector component in a direction (X axis direction) of the cut-off edge, and 'y' is a vector component in Y axis direction perpendicular to X axis and parallel to a principal surface of the laminated NF. When the second NF is viewed from Z axis direction perpendicular to X and Y axes, at least some of the second fibers satisfying x&#x3c;y/2 overlap the second fibers satisfying x&#x2265;y.

A laminated nonwoven fabric includes a first nonwoven fabric and a second nonwoven fabric. The first nonwoven fabric contains charged first fibers. The second nonwoven fabric contains second fibers, and is laminated on the first nonwoven fabric. A fiber diameter of the first fibers is larger than a fiber diameter of the second fibers.

Laminated nonwoven fabric, air purifier, and manufacturing method of laminated nonwoven fabric

A battery includes a positive electrode, a negative electrode, a separator interposed therebetween, and an electrolyte. The separator includes a plurality of nanofibers and has a form of a sheet having a first surface and a second surface opposite thereto. When the average maximum fiber diameter of the nanofibers in the plane direction of the separator is compared between in vicinities of the first and second surfaces and at a center portion in the thickness direction of the separator, average maximum fiber diameters Dsand Dsof the nanofibers in the vicinity of the first and second surfaces arc smaller than an average maximum fiber diameter Dc of the nanofibers at the center portion in the thickness direction of the separator.

Battery, battery separator and method for producing battery separator

A nanofiber manufacturing apparatus () which produces nanofibers () by electrically stretching a solution () in space. The apparatus includes: an effusing body () having effusing holes () for effusing the solution into the space, a tip part () in which openings () are arranged at given intervals, and two side wall parts () provided so as to extend from both sides of the tip part so that the effusing holes are located between the side wall parts and the distance between the side wall parts increases with the distance from the tip part; a charging electrode () disposed at a given distance from the effusing body; and a charging power supply () which applies a given voltage between the effusing body and the charging electrode.

Method of manufacturing nanofibers

A method of manufacturing nanofibers according to an aspect of the present invention by electrically stretching a solution in space and depositing the nanofibers in a given region includes: effusing the solution from an effusing body having an effusing hole which allows the solution to effuse in a direction; applying a given voltage between the effusing body and a charging electrode being conductive and disposed at a given distance from the effusing body, using a charging power supply configured to apply the given voltage; and determining a flight path of the solution and the nanofibers such that a length of the flight path of the solution and the nanofibers is longer than a shortest path length which is a length of a shortest imaginary path connecting an end opening of the effusing hole and an accumulation part on which the nanofibers are accumulated.

Nanofiber manufacturing apparatus and method of manufacturing nanofibers

A nanofiber manufacturing apparatus for fabricating nanofibers from a raw material liquid by electrostatic explosions includes a housing internally having an electrospinning space in which nanofibers are fabricated, and a support structure for supporting an electrospinning head including nozzles for ejecting the raw material liquid into the electrospinning space. The support structure is fittable to and removable from the housing and is enabled to self-stand in a state of having been removed from the housing.

Support structure, nanofiber manufacturing apparatus using the support structure, and nanofiber manufacturing method using the support structure

A container having a plurality of orifices in an outer peripheral wall and having a space communicating with the orifices is rotated to extrude an electrically charged raw material liquid containing a polymer material from the space through the orifices by centrifugal force. This allows the electrically charged raw material liquid to form a fibrous material. At this time, the raw material liquid is supplied to the space in which the raw material liquid is filled by a raw material liquid pump so that the raw material liquid is extruded from the orifices at a predetermined pressure. That is, the raw material liquid in the space is pressurized. Also, the shape of the space in the container is set so that the centrifugal force exerted on the raw material liquid is constant.

Process of making nanofibers

Nanofibers are manufactured while preventing explosions from occurring due to solvent evaporation. An effusing unit () which effuses solution () into a space, a first charging unit () which electrically charges the solution () by applying an electric charge to the solution (), a guiding unit () which forms an air channel for guiding the manufactured nanofibers (), a gas flow generating unit () which generates, inside the guiding unit (), gas flow for transporting the nanofibers, a diffusing unit () which diffusing the nanofibers () guided by the guiding unit (), a collecting apparatus which electrically attracts and collects the nanofibers (), and a drawing unit () which draws the gas flow together with the evaporated component evaporated from the solution () are included.

Nanofiber manufacturing apparatus and nanofiber manufacturing method

A nanofiber production device produces nanofibers by stretching, in a space, a solution. The nanofiber production device includes: an effusing body which effuses the solution into the space by centrifugal force; a driving source which rotates the effusing body; a supplying electrode which is placed at a predetermined distance from the effusing body and supplies charge to the solution via the effusing body; a charging electrode to which a potential of reverse polarity to a polarity of the effusing body is applied, with the charging electrode being placed at a predetermined distance from the effusing body; and a charging power source which applies a predetermined voltage between the supplying electrode and the charging electrode.

Nanofiber production device and nanofiber production method

A nanofiber manufacturing system in which nanofiber is formed from a raw material liquid by electrostatic explosions in a nanofiber forming space and the formed nanofiber is collected and deposited on a main surface of a base sheet. The system includes: a first dielectric belt having dielectric property; sheet conveying devices for conveying the base sheet in the nanofiber forming space; a sheet contacting device for putting a back surface of the base sheet and a first surface of the first dielectric belt into contact with each other; a dielectric belt driving device for running the first dielectric belt in a conveyance direction of the base sheet within the nanofiber forming space while the first surface is kept in contact with the back surface of the base sheet; and a voltage applying device for applying a voltage to the second surface of the first dielectric belt so that dielectric polarization occurs to the first dielectric belt.

Growing community of inventors

Nara, Japan

Hiroto Sumida