Sumitomo Chemical Company, Limited

Yuzuru Saitou

Hirohiko Hasegawa

Yoshiaki Takeuchi

Kazuyuki Ito

Tomohiro Sato

Hajime Maki

Aromatic polyester particles which are formed from an aromatic polyester having a flow starting temperature of 400&#xb0; C. or higher and have a circularity of a projected image of 0.80 or more and 1.00 or less.

Aromatic polyester particles and method for producing aromatic polyester particles

The present invention provides a laminated porous film and a non-aqueous electrolyte secondary battery. The laminated porous film is a laminated porous film in which a heat-resistant layer comprising a binder resin and a filler is laminated on one or both of the surfaces of a porous film substrate mainly comprising a polyolefin, wherein a part occupied by at least one out of the binder resin and the filler is formed in the porous film substrate so as to touch the heat-resistant layer, and the total thickness of the occupied part is not less than 1% and not more than 20% of the overall thickness of the porous film substrate. The non-aqueous electrolyte secondary battery comprises the laminated porous film according as a separator.

Laminated porous film and non-aqueous electrolyte secondary battery

The present invention provides a process for producing fine &#x3b1;-alumina particles, which comprises sintering a mixture of &#x3b1;-alumina precursor particles and seed crystal particles, wherein a center particle diameter of the seed crystal particles is 40 nm or less, and a ratio of the number of coarse particles having a particle diameter greater than 100 nm to the number of the total particles is 1% or less.

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Niihama, Japan

Yuzuru Saitou