Thermal Conduction
Insulation

Flexible

MOTOR

CIRCUITHigh thermal conduction insulation that conforms to complex uneven spaces

Clay-like thermally conductive material
Att. No. 389E・09-2024

BATTERYMarket Trends

Trends in the heat dissipation materials market
1. Market size trending upward
・Global market to grow to 1.5 times current size from 2022 to 2027
・The market for units for EVs will grow in particular

2. Heating values will increase due to higher unit output and density
・Trend toward higher thermal conductivity for thermally conductive materials（$M） Current State and Trends in the Heat Dissipation Materials Market
3,000
For telecom base stations

2,500

For smartphones

2,000

Automotive (Millimeter Wave Radar)

1,500

Automotive (LiB)
Automotive (ECU)

1,000
500
0

Automotive (Inverters)

2021

2022

2023

2024

2025

2026

2027

Source: Fuji Keizai Group, "2023 Thermal Control and Heat Dissipation Materials Market Status and New Application Development" (July 2023)© NOK CORPORATION. All Rights Reser ved.

02

Market Trends

There is demand for materials that can overcome
the weak points of conventional thermally conductive materials
Comparison of typical thermally conductive material characteristics
Characteristic

SheetGreaseGap filler

NOK Clay type

Adhesion to uneven surfaces, gaps

×△◎◎

Pump-out, bleed-out◎△〇◎Stress on mating surface

△

〇

〇

〇

Temperature change and vibration followability

◎×

〇

〇

Storage stability

〇〇

△

〇

Auto-application

×◎◎〇Clay-like thermally conductive material…
● Needs no curing reaction-easy handling● Adheres easily to uneven surfaces and gaps

● Is pump-out and bleed-out resistant● Puts less stress on mating surfaces● Can be auto-applied

Clay-like thermally conductive material overcomes
the weak points of conventional thermally conductive materials© NOK CORPORATION. All Rights Reser ved.

03

Product Features

Soft, Low-Adhesion, Thin and Stretchable
Freely deformable clay-like thermally conductive material

Soft and clay-like・Highly deformable
・Fills 3D, curved surfaces and complex spaces

Superior handling and reworkability
・No flowing at room temperature, no pumping out athigh temperatures
・No work process or installation site contamination

Has electrical insulation properties
・Usable around electric circuits
and electronic components© NOK CORPORATION. All Rights Reser ved.

04

Introducing: High Thermal Conductivity Grade CL50 (under development)

Excellent thermal conductivity efficiency
due to high deformability compared to competitors' 5.7W/mK

Comparison of IC temperature rise control by thermally conductive materials *Based on in-house assessment
Heat generated from amplifier ICs and 3-terminal regulators is measured at the temperature sensing part.
Comparing heat transfer effect heat sink: Competitor's thermally conductive sheet (5.7 W/m-K) vs.
NOK Clay Standard Grade and High Thermal Conductivity Grade.

Circuit board heating andtemperature sensing parts

Test Results

Thermally conductive material
Installation Configuration

80

Heat release70

NOK Clay type60

Circuit board

Amp IC. 3-terminal REG

Heat release
Heat sink(Amp IC)© NOK CORPORATION. All Rights Reser ved.

Circuit board

NOK Clay typeHigh thermal
conductivity grade(5W/m•K)

5040

20

Heating（3-terminal REG）

NOK Clay type
Standard grade(2.8W/m•K)

30

Thermally conductivesheet

Heating

IC temp［℃］T e mp .

(Amp IC fix point）

Heat sink

Competitor thermally conductive sheet(About 5.7W/m•K）

Amp IC. 3-terminal REG

0300600

900

Application time［S］

High thermal conductivity grade (CL50) is under development. Specifications are subject to change without notice. 05

Introducing: Dispenser Grade CLD31 (under development)

Low Viscosity Specs Allow Dispensing Application...
...while retaining clay-like properties

Low viscosity doubles application speed with improved followability. *Based on in-house assessment

Softer than conventional products, with smoother application.
The result: application speed 2x that of conventional products, and faster line anddot application speeds. Of course, dispensing thick lines is also easy.
On top of that, improved followability enables adhesion to uneven surfaces
and gaps on the heating surface with less force than conventional methods.
NOK Clay type introductory video

Motor coil application© NOK CORPORATION. All Rights Reser ved.

Motor coil application

Circuit board application

Can be applied with a store-bought cartridge gun

Dispenser grade (CLD31) is under development. Specifications are subject to change without notice. 06

Application Examples

Superior heat-resistance, insulation and deformability lets you
Use it where existing thermally conductive materials can’t go

Application to a motor coil

Application to a circuit board

Motor coil is filled;
heat is dispersed to housing.

© NOK CORPORATION. All Rights Reser ved.

Sticks fast to uneven
mounting board surfaces,
heat is dispersed to heat sink.

07

Representative Features

Select from 3 types according to usage environment

Item

CL28

CL50(under development)

CLD31(under development)

Test Method

ColorWhiteWhiteWhite－Specific weight

2.8

3.1

2.8

－

Hardness (unworked penetration)

120

130

220

JIS K2220

Thermal conductivity

2.8

5.0

3.1

Hot wire method℃−40～200−40～150−40～150－Volume resistivityΩ・cm>2.7×1013

4.2×1012

7.6×1012(Drying treatment 105℃/24h)

Breakdown strength (AC)

kV/mm

7.6

7.3

4.5

JIS C2110

Voltage endurance(1min)

kV/mm

6.5

9.5

9.5

JIS C2110

W/m・K

Recommended working temp.

100Hz

1kHz

1MHz

100Hz

1kHz

1MHz

100Hz

1kHz

1MHz－

Relative permittivity

6.2

6.0

5.9

13.1

8.7

7.5

8.5

6.7

6.1

JIS C2138

Dissipation factor

0.023

0.011

0.006

0.515

0.196

0.008

0.351

0.105

0.008

JIS C2138

Frequency
Dielectriccharacteristics

JIS K6249

Flame retardance
Low molecular siloxane (D3-D10)*Actual measured valueppm

V-0 equivalent

V-0 equivalent

HBF equivalent

UL94

189

3056

140℃×10min(GC/MS)*NOK's Clay-like Thermally conductive material series is REACH and RoHS compliant. *CL50 and CLD31 grades are products under development. (specifications are subject to change without notice.)© NOK CORPORATION. All Rights Reser ved.

08

Application Examples

Environmental Test Changes

Clay-like thermally conductive material is resistant to environmental changes
Heat transfer characteristics are stable over the long term from low to high temperatures

CL28

Untreated−40℃(1,000h)(1,000h)

150℃(1,000h)

200℃

85℃/95%Rh(1,000h)(各30min×1,000cycle)-40℃⇔150℃

Hardness (unworked penetration)

120

115

−

130

185

125

Thermal conductivity

W/m・K

2.8

2.9

−

3.0

2.9

3

Breakdown strength (AC)

kV/mm

7.6

8.7

−

8.2

7.7

8.0

Volume resistivityΩ・cm>2.7×1013

1.5×1012−>2.7×1013

2.3×1012>2.7×1013(1,000h)(1,000h)

200℃

85℃/95%Rh(1,000h)(各30min×1,000cycle)

130125

100−

120

105

W/m・K

5.0

5.4

5.2

−

5.3

5.3

kV/mm

7.3

−

8.7

Untreated

Hardness (unworked penetration)
Thermal conductivity
Breakdown strength (AC)
Volume resistivity

−40℃(1,000h)

CL50 (under development)

Ω・cm

7.2
12

4.2×10

150℃

6.4
11

9.0×10−40℃

132.2×10

8.4×10

6.5
10

6.9×1012(1,000h)(1,000h)(1,000h)

200℃

85℃/95%Rh(1,000h)(各30min×1,000cycle)

220

210

190

−

205

195

W/m・K

3.1

3.1

3.1

−

3.4

3.1

Breakdown strength (AC)

kV/mm

4.5

5.04.9−5.4

4.5

Volume resistivityΩ・cm

3.0×1012

2.8×1012

2.4×1013−

9.2×1010

1.3×1013

CLD31 (under development)

UntreatedHardness (unworked penetration)
Thermal conductivity

© NOK CORPORATION. All Rights Reser ved.

150℃−-40℃⇔150℃-40℃⇔150℃

09

Vibration Test Results

Clay-like thermally conductive material is vibration-resistantNo peeling, shape change, or misalignment even in long-term vibration tests

Pre-Test and Post-Test Comparison with CL28Sample, peripheral jig structure

NOK Clay type

[ Test conditions ]Acrylic jigRef. standard: ISO16750-3
Duration：8 hours

Pre-Test and Post-Test Comparison with 3 types
Sample, peripheral jig structureΦ30mm

Observed surface

Vibrating direction

Vibrating direction

t10mm

Temperature：R.T.

Test movie ▶︎Board top

Board underside仕様

Pre-vibration

Pre-vibration

Post-vibration

Post-vibration© NOK CORPORATION. All Rights Reser ved.

Ref. standard: ISO16750-3

NOK Clay type

Type：Random vibration test

[ Test conditions ]Duration：8 hours
Type：Random vibration test

Φ30mm

Temperature：R.T.

Acrylic jig

Test movie ▶︎t3mm

CL28CL50

CLD3110S a l e s Sy s t e mIntroduction of Sales Style and EC Sales Sites
Sales Style ※Packaging under development for high thermal-conduction specs and dispenser specs is subject to change.

CL28 packaging

50g

CL50 packaging

500g

EC Sales Sites

50g

CLD31 Specs Packaging

Cartridge（900g/each）

Pail (18kg)*This site only handles CL28 products

As-1 AXEL Shop

https://www.axel-gl.com/en/asone/d/64-0995-52/© NOK CORPORATION. All Rights Reser ved.

11N O K ’s S u p p o r t Sy s t e m

SupportDependable

NOK supports your development

Technology development

Material technology

Global development

NOK's products are backed by repeated

NOK’s self-contained development

Material technology is one of NOK's core

NOK has established production bases

research on the materials used andsystem covers the entire process fromtechnologies. We have been working onaround the world, including Japan,mechanical designs. They are highly

product design to product inspection.

the material compounding and chemical

China, and elsewhere in Asia, and havedependable and have been used for many

We actively integrate R&D and production

analysis technologies needed to develop

built a stable supply system to meet ouryears in a wide variety of machines.

technologies to create unique, cutting-rubber and adhesives used in sealcustomers' needs.

edge technologies and products.

products.

For consultations and inquiries, feel free to contact us using this form.
© NOK CORPORATION. All Rights Reser ved.

12

N O K ’s S u p p o r t Sy s t e mLinks

Get access to NOK’s latest info

NOK posts the latest information on X (formerly Twitter) and YouTube.

Official Website

https://www.nok.co.jp/en/

X（formerly Twitter）

https://twitter.com/NOK _expo

YouTubehttps://www.youtube.com/channel/
UCZFWmMZI8Hj6C01Z3pZwkWw© NOK CORPORATION. All Rights Reser ved.

13