GRAPHITE LAMINATED BODY

• US 20160279902A1
• Filed: 10/27/2014
• Published: 09/29/2016
• Est. Priority Date: 11/01/2013
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation), Du Pont-Toray Co., Ltd. (Toray Industries Incorporated)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation), Du Pont-Toray Co., Ltd. (Toray Industries Incorporated)
• Inventors: YASUDA, Naofumi, TOIDA, Noriko, NISHIKI, Naomi, NISHIKAWA, Kazuhiro
• Granted Patent: US 10,946,617 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B32B 2255/10 on synthetic resin layer or on natural or synthetic rubber layer
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2264/102 Oxide or hydroxide
• CPC Class Codes: B32B 2264/108 Carbon, e.g. graphite particles
• CPC Class Codes: B32B 2307/20 having particular electrical or magnetic properties, e.g. piezoelectric
• CPC Class Codes: B32B 2307/302 Conductive
• CPC Class Codes: B32B 2307/306 Resistant to heat
• CPC Class Codes: B32B 2307/54 Yield strength; Tensile strength
• CPC Class Codes: B32B 2307/546 Flexural strength; Flexion stiffness
• CPC Class Codes: B32B 2307/72 Density
• CPC Class Codes: B32B 2307/732 Dimensional properties
• CPC Class Codes: B32B 2457/08 PCBs, i.e. printed circuit boards
• CPC Class Codes: B32B 27/06 as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/20 using fillers, pigments, thixotroping agents
• CPC Class Codes: B32B 27/281 comprising polyimides
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/322 comprising halogenated polyolefins, e.g. PTFE
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: B32B 9/007 comprising carbon, e.g. graphite, composite carbon
• CPC Class Codes: B32B 9/045 : of synthetic resin
• CPC Class Codes: H05K 1/056 : the metal substrate being covered by an organic insulating layer
• CPC Class Codes: H05K 2201/0129 : Thermoplastic polymer, e.g. auto-adhesive layer; Shaping of thermoplastic polymer
• CPC Class Codes: H05K 2201/0323 : Carbon

Abstract

Provided is a graphite laminated body having excellent properties such as excellent mechanical properties, excellent heat resistance, and excellent thermal conductivity. In particular, provided is a graphite laminated body comprising a graphite film, a non-thermoplastic polyimide film, and an adhesive layer for bonding the graphite film to the non-thermoplastic polyimide film, the adhesive layer being made of a thermoplastic polyimide or a fluororesin.

Claims

1. A graphite laminated body comprising a graphite film, a non-thermoplastic polyimide film, and an adhesive layer for bonding the graphite film to the non-thermoplastic polyimide film, the adhesive layer being made of a thermoplastic polyimide or a fluororesin.

2. The graphite laminated body according to claim 1, wherein the adhesive layer is made of a fluororesin and has a contact angle with water of 90 to 120 degrees.

3. The graphite laminated body according to claim 1, wherein the adhesive layer is made of a fluororesin and has a melt flow rate of 40 g/10 min or less.

4. The graphite laminated body according to claim 1, wherein the graphite film is a film produced using a polymer film as a raw material.

5. The graphite laminated body according to claim 4, wherein the polymer film is a polyimide film.

6. The graphite laminated body according to claim 1, wherein the non-thermoplastic polyimide film has a thermal expansion coefficient of 30 ppm/°

C. or less.

7. The graphite laminated body according to claim 1, wherein the graphite film has a thermal conductivity of 200 W/m·

K or more in the surface direction, and a thermal conductivity of 0.1 W/m·

K or more in the thickness direction, and a ratio of the thermal conductivity in the surface direction to that in the thickness direction of 40 or more.

8. The laminated body according to claim 1, which has a permittivity of 5 or less.

9. The graphite laminated body according to claim 1, wherein the non-thermoplastic polyimide film has a tensile elastic modulus of 3.0 GPa or more.

10. The graphite laminated body according to claim 1, wherein the thermoplastic polyimide comprises one or more types of thermoplastic polyimides selected from the group consisting of thermoplastic polyamide-imides, thermoplastic polyetherimides, silicone-modified polyimides, sulfonated polyimides, and thermoplastic polyesterimides.

11. The graphite laminated body according to claim 1, wherein the fluororesin contains tetrafluoroethylene-hexafluoropolypropylene copolymer.

12. The graphite laminated body according to claim 1, which is used for a FPC board.