Sekisui Chemical Co., Ltd.

Asahi Kasei Kabushiki Kaisha

Other

Polyplastics Co., Ltd.

Topas Advanced Polymers Gmbh

Takahiko Sawada

Hiroshi Hiraike

Hitoshi Kobayashi

Yasumasa Okada

Masahiro Ishii

Akihiro Ogawa

Shoji Nozato

Wilfried Hatke

Hajime Serizawa

Takeharu Morita

Toshihiro Otsuki

Isao Higuchi

Hiroyuki Kanai

Katsunori Toyoshima

Masahiko Gotoh

Shotaro Kobaru

Kiyomi Uenomachi

Junichi Nakadate

Anne-Meike Schauwienold

Masahiro Asuka

Matthias Bruch

Taehyung Cho

Udo Manfred Stehling

Yuki Kanaoka

Kazunari Yagi

Jiamo Guo

Kazuaki Hiratani

Takahiro Nomura

Masatoshi Minami

Mitsuo Sasakura

Hiroshi Tada

Kazuo Yamagata

The present invention provides a propylene-based resin microporous film which has excellent lithium ion permeability, can constitute a high-performance lithium ion battery, and can prevent a short circuit between a positive electrode and a negative electrode due to dendrites. The propylene-based resin microporous film of the present invention is a propylene-based resin microporous film containing micropores, wherein the degree of gas permeability is 100 to 400 s/100 mL, the standard deviation of the degree of gas permeability is 7 s/100 mL or less, the thermal shrinkage ratio during heating at 105&#xb0; C. for 2 hours is 6% or less, and the standard deviation of the thermal shrinkage ratio is 1% or less.

Propylene-based resin microporous film, separator for battery, battery, and method for producing propylene-based resin microporous film

Provided are a heat-resistant synthetic resin microporous film that has both good heat resistance and good mechanical strength and exhibits a suppressed decrease in mechanical strength over time, and a method for producing the heat-resistant synthetic resin microporous film. The heat-resistant synthetic resin microporous film of the present invention includes a synthetic resin microporous film, and a coating layer formed on at least part of the surface of the synthetic resin microporous film and containing a polymer of a polymerizable compound having two or more radically polymerizable functional groups per molecule. The maximum thermal shrinkage rate of the heat-resistant synthetic resin microporous film when heated from 25&#xb0; C. to 180&#xb0; C. at a temperature rising rate of 5&#xb0; C./min is 15% or less. The piercing strength thereof is 0.6 N or more. The rate of retention of the piercing strength after heating at 70&#xb0; C. for 168 hours is 85% or more.

Heat-resistant synthetic resin microporous film and method for producing the same

Provided is a method for producing a propylene-based resin microporous film capable of forming a high-performance lithium ion battery. The method for producing a propylene-based resin microporous film includes an extrusion step of melt-kneading a propylene-based resin in an extruder, and extruding the resin to obtain a propylene-based resin film; a first stretching step of uniaxially stretching the propylene-based resin film at a surface temperature of &#x2212;20 to 100&#xb0; C.; second stretching step of repeating, a plurality of times, a stretching basic step in which the propylene-based resin film after the first stretching step is uniaxially stretched at a surface temperature that is equal to or lower than a temperature lower than the melting point of the propylene-based resin by 10 to 100&#xb0; C., wherein between successive stretching basic steps, the stretching ratio in the forward-side stretching basic step is adjusted so as to be lower than that of the backward-side stretching basic step; and an annealing step of annealing the propylene-based resin film after the second stretching step.

Method for producing propylene-based resin microporous film and propylene-based resin microporous film

The present invention provides a sealing material for a solar cell that seals a solar cell element of a solar cell in a short time in the production of a solar cell module, thereby enabling efficient production of solar cell modules. The sealing material for a solar cell of the present invention has a feature of containing 100 parts by weight of a modified butene-based resin that is produced by graft-modifying a butene-ethylene copolymer having a butene content of 1 to 25% by weight with maleic anhydride and has a total content of the maleic anhydride of 0.1 to 3% by weight, and 0.1 to 15 parts by weight of a silane compound having an epoxy group.

Sealing material for solar cell, protective sheet for solar cell, and process for production of solar cell module

A novel cycloolefin copolymer that can be employed in the production of molding with fewer defects, for example, fewer gel particles (fish eyes). There is provided a cycloolefin copolymer comprising 80 to 20 mol % of repeating units derived from an &#x3b1;-olefin monomer and 20 to 80 mol % of repeating units derived from at least one cycloolefin monomer selected from the group consisting of monomer of the general formula (I), monomer of the general formula (II), monomer of the general formula (III), monomer of the general formula (IV) and monomer of the general formula (V), wherein with respect to the repeating units derived from cycloolefin monomer, the proportion thereof being present in the form of dimer (Rd) is 50 mol % or below and the proportion thereof being present in the form of trimer (Rt) 5 mol % or above.

Cycloolefin copolymer

The polarizing plate protection film of the present invention has excellent adhesion with the polarizer because of the polyurethane resin layer formed on the thermoplastic saturated norbornene-type resin film. In addition, blocking of the protection film can be prevented by the PVA layer formed on the polyurethane resin layer. The polarizing plate using the protection film of the present invention is excellent in terms of durability under high temperature and high humidity conditions, and it is suitably used for liquid crystal displays and such.

Protecting film for polarizing plate and polarizing plate

Polarizer protection film

Growing community of inventors

Osaka, Japan

Takahiko Sawada