Graphite Sheet
GRAPHINTY™
Graphite Sheet Stickers
GRAPHINITY is a high thermal conductive graphite sheet that has been developed through our high polymer technologies and ultra heat treatment techniques. This material can spread heat from a heat source quickly, and can decrease the temperature of it.
Uses and Typical Applications
GRAPHINITY graphite sheet works on the heat management of small electronic devices such as mobile phone and mobile console, mobile PC, projector, in-car electronic device and so on.
(A) Insulation layer / Graphite / Adhesive layer
(B) Adhesive layer / Graphite / Adhesive layer
(C) Graphite / Adhesive layer
(D) Insulation layer / Graphite / Insulation layer
(E) Graphite / Insulation layer
*PSA : Pressure sensitive adhesive
Technical data 1 : Thermal diffusion effect
Comparison of heat spreading ability of some materials
GRAPHINITY graphite sheet has much larger heat spreader ability than copper and aluminum which has same thickness.
Heat source : 10mm square ceramic heater, wattage 2.0W, sample size : 50mm square, open cooling. The back surface of chip was measured. Displayed temperature is the center of the sample. These data are not guaranteed values but the typical measurement values at our company.
Application to a LED back light of mobile phone (Simulation)
GRAPHINITY graphite sheet has the suppression effect of temperature irregularity and heat spot on an electronic devices.
The temperature of LCD surface is displayed. These data are not guaranteed values but the typical measurement values at our company.
Technical data 2 : Flexibility and electromagnetic shielding effect
Flexibility test (MIT test)
GRAPHINITY graphite sheet has high flexibility and bend ability.
| Materials | Thickness | Bending times |
| GRAPHINITY | 25µm | >10000 |
| 40µm | >10000 |
Test condition R = 2mm, 270° Load: 100g
These data are not guaranteed values but the typical measurement values at our company.
Electromagnetic shielding effect (KEC method)
GRAPHINITY graphite sheet has high electromagnetic shielding effect.
Grade
| Unit | Typical values | Method | ||||||
| 10μm | 18μm | 25μm | 32μm | 40μm | ||||
| Thinkness | μm | 10 | 18 | 25 | 32 | 40 | Micrometer | |
| Thermal conductivity | In plane (XY axis) | W/mK | 1600 | 1600 | 1500 | 1500 | 1500 | AC calorimeter method |
| Thru plane (Z axis) | 5 | 5 | 5 | 5 | 5 | Laser flash method | ||
| Thermal diffusivity | cm²/s | 9 | 9 | 9 | 9 | 9 | AC calorimeter method | |
| Specific gravity | g/cm³ | 2.1 | 2.1 | 2 | 2 | 2 | Kaneka method | |
| Tensile strength | Mpa | 40 | 40 | 40 | 40 | 40 | ASTM-D-882 | |
| Bending | Cycles | >10000 | >10000 | >10000 | >10000 | >10000 | JIS-C5016, R=2mm, 135° | |
| Electrical Conductivity | S/cm | 14000 | 14000 | 13000 | 13000 | 13000 | JIS K 7194 | |
| Heat resistance | °C | 500 | 500 | 500 | 500 | 500 | TG-DTA | |
| Water absorption | % | <0.1 | <0.1 | <0.1 | <0.1 | <0.1 | JIS K 7209 | |
