Panasonic Intellectual Property Management Co., Ltd.

Takayoshi Yamaguchi

Takahiro Kurokawa

Taichi Nakamura

Hiroto Sumida

Takatoshi Mitsushima

Koji Motomura

Tadashi Maeda

Yuki Yoshioka

Yosuke Wada

A laminated nonwoven fabric includes first to third nonwoven fabrics and an adhesive sandwiched between at least the second nonwoven fabric and the third nonwoven fabric. The second nonwoven fabric contains second fibers and is laminated on the first nonwoven fabric containing first fibers, and the third nonwoven fabric contains third fibers and is laminated on the second nonwoven fabric on an opposite side to the first nonwoven fabric. An average fiber diameter of the first fibers is larger than that of the second fibers. The second nonwoven fabric has first and second regions which exist mixedly with each other, and a density of the second fibers in the second region is lower than that in the first region. A part of the adhesive is present between a portion of the first nonwoven and a portion of the third nonwoven fabric which face the second region.

Laminated nonwoven fabric and manufacturing method thereof

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 (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.

Laminated nonwoven fabric and air purifier

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 filtering medium includes a nonwoven fabric and a first electrode having an input terminal of power. The first electrode is provided on a surface of the nonwoven fabric. Alternatively, in a case where the nonwoven fabric has a plurality of fiber layers, the first electrode may be provided between the fiber layers. An air purifier includes the filtering medium disposed between a sucker and a discharger of a gas, and an output terminal via which power is output to the first electrode of the filtering medium.

Filtering medium and air purifier

A nonwoven fabric includes a fiber including a first portion and a second portion connected to the first portion. A first fiber diameter of the first portion is smaller than a reference fiber diameter. A second fiber diameter of the second portion is equal to or greater than the reference fiber diameter. The reference fiber diameter is smaller than 1 &#x3bc;m. A ratio of a maximum fiber diameter of the second portion to a length of a linear line connecting both end portions of the second portion is from 1/10 to 1/3.

Nonwoven fabric and test tool

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.

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Osaka, Japan

Takayoshi Yamaguchi