Kaneka Corporation

Kanera Corporation

Kazuhiro Ono

Kiyokazu Akahori

Kan Fujihara

Yasutaka Kondo

Makoto Tawada

Takaaki Matsuwaki

Yasushi Nishikawa

Takashi Inada

Kosuke Kataoka

Eiichiro Kuribayashi

Hiroyuki Ushiro

Junpei Saito

Masasru Nishinaka

Seiji Hosogai

Hidehito Nishimura

A polyimide laminated film containing a thermoplastic polyimide layer that includes a block (A) having a storage elastic modulus of 0.15 GPa or more at 380&#xb0; C. and a block (B) having a storage elastic modulus of 0.10 GPa or less at 380&#xb0; C. is used as a polyimide laminated film that has high peel strength and can suppress occurrence of a crack in an alkaline environment.

Polyimide laminate film, method for manufacturing polyimide laminate film, method for manufacturing thermoplastic polyimide, and method for manufacturing flexible metal-clad laminate

An insulating coating material including a polyimide film, and an adhesion layer on at least one side of a polyimide film. The polyimide film has a weight of 23.5 g or less per 1 mand a loop stiffness value of 0.45 g/cm or more.

Insulating coating material having excellent wear resistance

An insulating coating material including an insulating film, and an adhesion layer on at least one side of an insulating film. The insulating film satisfies Formula (1) a=k&#xd7;b. . . Formula (1) where a is a loop stiffness value in g/cm of the insulating film, b is a thickness in &#x3bc;m of the insulating film, and k is 0.000105 or more.

An insulating coating material is provided herein. In some embodiments, the insulating coating material comprises an insulating film comprising a polyimide resin, wherein the insulating film, when measuring a tensile elasticity in accordance with ASTM D882, having a stress at 5% strain of 180 MPa or greater and a stress at 15% strain of 225 MPa or greater, wherein the stress at 15% strain is greater than the stress at 5% strain.

Insulating coating material and use of same

A fire barrier system for use in aircraft, ship or offshore drilling platform comprises a flexible graphite sheet. Methods of providing fire barrier protection in an aircraft, ship or offshore drilling platform comprise installing the described fire barrier system in the aircraft, ship or offshore drilling platform. Additionally, the fire barrier system when installed in the aircraft, ship or offshore drilling platform is described.

Fire barrier protection for airplanes comprising graphite films

The present invention relates to an adhesive film with which a flexible metal-clad laminate is obtained with suppressed dimensional changes occurred when produced by a laminating method; and a flexible metal-clad laminate comprising the adhesive film and a metal foil bonded thereto. The adhesive film comprises a polyimide film and, formed on at least one side thereof, an adhesive layer comprising a thermoplastic polyimide and has coefficients of linear expansion satisfying the relationship 1.0&#x3e;(coefficient of linear expansion in the MD direction)/(coefficient of linear expansion in the TD direction)&#x3e;0.1. This adhesive film may be one produced continuously and further satisfying the relationship 1.70&#x3e;(elastic modulus in the MD direction)/(elastic modulus in the TD direction)&#x3e;1.05 when the adhesive film has an MD modulus of 5 GPa or higher throughout the whole width thereof. That adhesive film may be one produced continuously and further satisfying the relationship 2.00&#x3e;(elastic modulus in the MD direction)/(elastic modulus in the TD direction)&#x3e;1.10 when the adhesive film has an MD modulus less than 5 GPa throughout the whole thereof.

Adhesive film, flexible metal-clad laminate, and processes for producing these

A polyimide film in which the dimensional change is reduced when it has undergone a step of laminating a metal on the polyimide film or a step of etching the metal layer to form wiring, and the rate of dimensional change can be stabilized across the entire width is provided. The object can be solved by a polyimide film produced by a continuous process, wherein when a coefficient of linear expansion a in a direction of the molecular orientation axis and a coefficient of linear expansion b in a direction perpendicular to the molecular orientation axis are measured in the temperature range of 100&#xb0; C. to 200&#xb0; C., a and b satisfy a particular relationship across the entire width, or a polyimide film produced by a continuous process, wherein when a tear propagation resistance c in the direction of the molecular orientation axis and a tear propagation resistance d in the direction perpendicular to the molecular orientation axis are measured, c and d satisfy a particular relationship across the entire width.

Polyimide film and use thereof

A polyimide film of the present invention is a polyimide film having a dynamic viscoelasticity whose tan &#x3b4; peak is located in a range of not less than 310&#xb0; C. but not more than 410&#xb0; C., and whose tan &#x3b4; value at 300&#xb0; C. is not more than 0.05, or a polyimide film prepared by copolymerizing (a) an acid dianhydride component including a biphenyltetracarboxylic dianhydride and a pyromellitic dianhydride, and (b) a diamine component, and the polyimide film having such an etching speed that one side thereof is etched with a 1N potassium hydroxide solution at an etching speed of 0.1 &#x3bc;m/minute (one side) or higher. The polyimide film of the present invention possesses film properties that are necessary for use in an electronic raw material for flexible printed circuit boards and the like, and is suitable as an electronic raw material.

Polyimide film and laminate having metal layer and same

A polyimide film according to the present invention satisfies Condition (1) in which a tear propagation resistance variation Cis not more than 1.0 g, and/or Condition (2) in which a swelling coefficient Cafter being dipped in an alkaline solution is not more than 20.0. By satisfying these conditions, workability of the polyimide film can be improved and working defects can be effectively prevented, thereby improving productivity of each step.

Polyimide film excellent in alkali etching processability and punchability

In a step of polymerizing polyamic acid by mixing tetracarboxylic acid dianhydride and diamine and polycondensating the tetracarboxylic acid dianhydride and diamine under the presence of a polymerization-use solvent, a tetracarboxylic acid dianhydride slurry in which a tetracarboxylic acid dianhydride is dispersed in a dispersion medium is used. According to this, it is possible to directly manufacture a polyamic acid solution having a high concentration of polyamic acid more than or equal to 10% by weight. Especially, even if a tetracarboxylic acid dianhydride having low solubility in the polymerization-use solvent, it is possible to effectively manufacture a polyamic acid solution having high solids content, by a simple process and in a short time.

Manufacturing method of polyamic acid, and polyamic acid solution

A polyimide/fluororesin laminate comprises a polyimide film and a fluororesin layer. The tear propagation resistance strength of the polyimide film after being exposed to 150&deg; C. 100% RH environment for 12 hours is not less than 80% of the tear propagation resistance strength of the polyimide film before exposure. Particularly, the polyimide film contains at least one of Al, Si, Ti, Mn, Fe, Co, Cu, Zn, Sn, Sb, Pb, and Bi. The laminate is useful for an insulating tape for wire-winding.

Polyimide/fluororesin laminates, producing method thereof, and insulating tape for wire-winding using the same

Polyimide film and electric/electronic equipment bases with the use thereof

A fluoro-carbon resinous laminate has a crack-resistant surface on a fluoro-carbon resinous layer thereof produced by coating a single surface or both surfaces of a plastic film with a single layer of a fluoro-carbon resinous dispersion, and a method of producing the laminate. To produce the fluoro-carbon resinous laminate, which is a minimum of 10 .mu.m in thickness, a single surface or both surfaces of a plastic film are coating with a single layer of concentration-adjusted fluoro-carbon resinous dispersion and then dried, followed by curing the resinous dispersion in a thermal treating furnace with heated atmospheric air or by adding organic solvent to the resinous dispersion, the enabling production of a fluoro-carbon resinous laminate having a surface appearance in which cracks cannot visually be identified.

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Otsu, Japan

Kazuhiro Ono