Heat conductive sheet

Features

  • Siloxane-free
    The product does not generate low-molecular-weight siloxane which causes problems such as contact failure and optical lens clouding.

Amount of detected siloxane

Amount of detected siloxane
  • (Note) Values were measured using a method selected by FEPS
  • Environmental friendly
    All TM Sheets comply with environmental regulations such as ROHS, REACH, and North American TSCA. The sheets do not contain the hazardous substances halogen, lead, and chlorofluorocarbon.
  • Low VOC (volatile organic compounds)
    Materials and manufacturing methods that generate less gas are used. The amount of generated gas is less than that of general thermal conductive sheets.
    Reduces the risk of corrosion of components (connectors, wiring, etc.) and clouding of optical components.

VOC generation amount

VOC generation amount
  • Low oil bleed
    Lower oil bleeding than typical silicone products.
  • Easy handling
    The two-layer structure of a thin PET film and main layer achieves durability and easy handling (for VHT, VST, EE-RT).
Easy handling
Easy handling
  • (Note) Do not remove the PET film.
  • (Note) The PET film is somewhat wrinkled during the manufacturing process. The wrinkles are smoothed when pressure is applied, so there is virtually no effect on heat resistance.

Use

  • General industrial use
    High-performance printers, semiconductor manufacturing equipment, optical equipment, communication equipment, measuring equipment, liquid crystal displays, LED lighting, servers, storage, etc.
  • Automobile use
    Automotive navigation systems, various control devices, hybrid/EV power supplies, cameras, etc.
  • Digital devices use
    Computers, digital cameras, HDDs, TVs, video games, etc.

Lineup

  • Standard type:
    EE-RT
  • High heat conductive type: VHT
  • Soft type: TPE
  • Others

Standard type: EE-RT

Standard type: EE-RT

The sheet has a two-layer structure consisting of an acrylic body and a PET film. The sheet is rigid, possesses high thermal conductivity, and is easy to handle.
The thickness is 0.3mm, which is the thinnest among non-silicon products. This creates an advantage in terms of thermal resistance.

Properties

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  Thickness*1
(mm)
Thermal conductivity
(W/m-K)
Hardness*2
(Asker C)
Volume resistivity
(Ω-cm)
Dielectric breakdown
(kV/mm)
Flame retardancy Temperature range*3
(°C)
Density
Min Max
EE-RT 0.3 8.0 3.0 50 1 x 1010 10 V-0 -40 - 120 2.6
Measurement standards JIS B 7503 JIS R 2616 JIS K 7312 JIS K 6911 JIS K 6911 UL 94
(file No. E210580)
FEPS standards JIS Z 8807
  • *1 Thickness is in intervals of 0.5 mm (1.5 mm, 2.0 mm etc.).
  • *2 Hardness (Asker C) is measured 15 seconds after contact based on JIS specifications (15-second value). Please contact us for the numerical value at the time of contact (0-second value).
  • *3 The heat resistance temperature is determined based on changes in factors such as hardness and differs depending on usage conditions.
  • (Note) These are measured values and are not guaranteed.

Sizes

Sizes

High heat conductive type: VHT

High heat conductive type: VHT

This sheet has a two-layer structure consisting of a main body made of thermoplastic elastomer and a PET film. It has the highest thermal conductivity of any non-silicon sheet.

Properties

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  Thickness*1(mm) Thermal conductivity
(W/m-K)
Hardness*2
(Asker C)
Volume resistivity
(Ω-cm)
Dielectric breakdown
(kV/mm)
Flame retardancy Temperature range*3
(°C)
Density
Min Max
VHT 0.5 4.0 4.5 45 1 x 1012 6.5 V-0 -40 - 120 2.5
  • *1 Thickness is in intervals of 0.5 mm (1.5 mm, 2.0 mm etc.).
  • *2 Hardness (Asker C) is measured 15 seconds after contact based on JIS specifications (15-second value). Please contact us for the numerical value at the time of contact (0-second value).
  • *3 The heat resistance temperature is determined based on changes in factors such as hardness and differs depending on usage conditions.
  • (Note) These are measured values and are not guaranteed.

Soft type: TPE

Soft type: TPE

This sheet has a two-layer structure consisting of a main body made of thermoplastic elastomer and a PET film. It possesses excellent flexibility.
The sheet is designed to alleviate compressive load on the substrate and parts, absorb the gap tolerance between the object and the radiator, conform to undulations when adhered to an uneven surface, and reduce thermal resistance due to close contact.

Properties

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  Thickness*1(mm) Thermal conductivity
(W/m-K)
Hardness*2
(Asker C)
Volume resistivity
(Ω-cm)
Dielectric breakdown
(kV/mm)
Flame retardancy Temperature range*3
(°C)
Density
Min Max
VST 1.0 2.6 18 1 x 1013 2.4 V-0 -40 - 120 2.2
  • *1 Thickness is in intervals of 0.5 mm (1.5 mm, 2.0 mm etc.).
  • *2 Hardness (Asker C) is measured 15 seconds after contact based on JIS specifications (15-second value). Please contact us for the numerical value at the time of contact (0-second value).
  • *3 The heat resistance temperature is determined based on changes in factors such as hardness and differs depending on usage conditions.
  • (Note) These are measured values and are not guaranteed.

Others

EE-RS
EE-RS
V30
V30
HF-N
HF-N

We also offer flexible and thick types EE-RS and V30, as well as the hard type HF-N.

Properties

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  Material/feature Thickness*1(mm) Thermal conductivity
(W/m-K)
Hardness value at 15 secs*2
(Asker C)
Flame retardancy Tacky side*3
Min Max
EE-RS Acrylics: Flexible 1.0 6.0 1.6 20 V-0 Front surface: Non-tacky (talc)
Back surface: Tacky
(Note) We also offer tape that is tacky on both sides.
V30 TPE: Flexible/elastic 1.0 8.0 1.7 25 V-0 Front surface: Non-tacky (talc)
Back surface: Tacky
HF-N Polyolefin: hard film type 0.3 2.0 80 V-0 Both the front side and back side are non-tacky.
(Note) We also offer tape that is tacky on one side.
  • *1 Thickness is in intervals of 0.5 mm (1.5 mm, 2.0 mm etc.).
  • *2 Hardness (Asker C) is measured 15 seconds after contact based on JIS specifications (15-second value). Please contact us for the numerical value at the time of contact (0-second value).
  • *3 The tacky side of TM Sheet does not adhesive; however, it has the inherent tackiness of rubber. This makes the sheet slightly adhesive. (HF-N is a non-adhesive film type that is basically non-adhesive, but can be coated with adhesive on one side as an option).
  • (Note) These are measured values and are not guaranteed.

Main product features

Thermal resistance

Conditions

Sheet thickness 1.0 mm (measured by compressing to 0.8 mm)
  2.0 mm (measured by compressing to 1.5 mm)

Results

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Sheet thickness EE-RT VHT VST
Δt °C/W Δt °C/W Δt °C/W
1.0 mm 1 5.35 0.446 4.15 0.346 5.85 0.488
2 5.3 0.442 4.1 0.342 5.9 0.492
Ave 5.325 0.444 4.125 0.344 5.875 0.490
2.0 mm 1 8.3 0.692 6.5 0.542 9.5 0.792
2 8.4 0.700 6.6 0.550 9.55 0.796
Ave 8.35 0.696 6.55 0.546 9.525 0.794
  • (Note) These are actual measured values and are not guaranteed.

Compression recovery properties

Conditions

Shape 6.0 t x 40 x 40mm
Compression rate 30 %
Compression time 10 minutes (left in compressed state for 10 minutes)
Release time 10 minutes (measure after leaving in released state for 10 minutes)

Results

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EE-RT VHT VST
Initial thickness
(mm)
After release
(mm)
Recovery rate
(%)
Initial thickness
(mm)
After release
(mm)
Recovery rate
(%)
Initial thickness
(mm)
After release
(mm)
Recovery rate
(%)
1 6.11 4.65 20.35 6.09 4.71 24.47 6.10 4.94 36.61
2 6.10 4.60 18.03 6.09 4.59 17.90 6.10 5.11 45.90
Ave 6.1 4.6 19.2 6.1 4.7 21.2 6.1 5.0 41.3
  • (Note) These are actual measured values and are not guaranteed.

Compressive stress

Conditions

Product shape 2.0 t x 20 x 20 mm
Compression rate 10 %,20 %,30 %
Compression speed 5 mm / min

Results

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EE-RT VHT VST
N/4cm2 N/cm2 N/4cm2 N/cm2 N/4cm2 N/cm2
10% 1 29.37 7.34 28.31 7.08 15.26 3.82
2 29.33 7.33 29.15 7.29 14.65 3.66
3 24.54 6.14 27.64 6.91 15.35 3.84
Ave 27.75 6.94 28.37 7.09 15.09 3.77
20% 1 103.67 25.92 122.50 30.63 38.45 9.61
2 109.54 27.39 130.10 32.53 39.65 9.91
3 106.48 26.62 125.01 31.25 40.36 10.09
Ave 106.56 26.64 125.87 31.47 39.49 9.87
30% 1 195.12 48.78 300.00 75.00 78.89 19.72
2 198.25 49.56 309.10 77.28 79.15 19.79
3 200.36 50.09 308.10 77.03 80.81 20.20
Ave 197.91 49.48 305.73 76.43 79.62 19.90
  • (Note) These are actual measured values and are not guaranteed.

Oil bleed

We attached filter paper to the sheet and then placed the sheet in a constant temperature bath. We then calculated the oil bleed change rate from the difference in the weight of the filter paper after the prescribed time.

Conditions

Shape 2.0 t x 20 x 20 mm
Temperature 100 °C
Time 1 week

Results

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EE-RT VHT
Filter paper weight Before test
(g)
After
1 week
(g)
Change rate
(%)
Before test
(g)
After
1 week
(g)
Change rate
(%)
1 0.318 0.318 -2.516 0.316 0.317 0.253
2 0.304 0.302 -0.559 0.306 0.306 0.033
3 0.310 0.311 0.226 0.315 0.321 1.967
Ave 0.311 0.308 -0.950 0.312 0.315 0.751
Photo of filter paper
EE-RT
VHT
VST Silicon (reference product)
Filter paper weight Before test
(g)
After 1 week
(g)
Change rate
(%)
Before test
(g)
After 1 week
(g)
Change rate
(%)
1 0.317 0.328 3.662 0.317 0.331 4.642
2 0.302 0.310 2.850 0.314 0.336 6.813
3 0.302 0.314 4.077 0.309 0.335 8.112
Ave 0.307 0.318 3.529 0.313 0.334 6.522
Photo of filter paper
VST
Silicon (reference product)
  • (Note) These are actual measured values and are not guaranteed.
  • (Note) A negative change rate is a measurement error and is considered to be practically zero.

Thermal performance test method

Thermal resistance

Thermal resistance is measured using the following devices. Test conditions are a 12W heating value with a 10-minute heating time.

Formula

Thermal resistance measurement (°C / W) = (Temperature of Thermocouple 1 (object side) - Temperature of Thermocouple 2 (heat sink side) / Applied power

Thermal resistance
  • The TM Sheet is sandwiched between the heat sink and object. Uniform pressure is applied to the sheet (measurement surface area: 9.63m²).
  • After using the object to heat for 10 minutes, the temperature difference caused by the object in contact with the TM sheet are measured. Thermal resistance (R1) is calculated by using the formula given above.

Thermal resistance = Thermal contact resistance with heat sink+ Thermal resistance of sheet + Thermal contact resistance with object

Thermal conductivity

Thermal conductivity is measured in accordance with the hot-wire method defined by JIS-R2616 using Quick Thermal Conductivity Meter made by Kyoto Electronics Manufacturing Co., Ltd. The measurement sample must be at least 10 mm thick.

Sizes, MOQ

Product size

Custom cut, standard cut (150 x 230 mm), and non-cut (original sheet) are available.

Custom Sizes

  • We cut out the greatest number of sheets possible (up to the size equivalent to the Standard Size (150 x 230 mm)).
  • The minimum size is 5 x 5 mm.
  • Sizes larger than 150 x 230 mm are also available upon consultation.
  • We may charge a fee if it is necessary to adjust the punching die for custom sizes.
Custom sizes

Standard size

  • Our standard size is 150 x 230 mm (A5 size).
Standard size

Non-cut original sheet

  • The term “original sheet” refers to a sheet without cut edges. The effective dimensions are 160 x 240 mm.
Non-cut original sheet
  • The film protrudes sideways from the original sheet of products with PET film (EE-RT, VHT, etc.) (film width is 350 mm).
Non-cut original sheet

MOQ

The MOQ is 50 sheets in standard cut size.

  • (Note) Please contact us for information on packaging style.

Samples and estimates

Please use the following contact information to request samples and estimates.

Warnings

  • This product is for general industrial use. Do not use for medical purposes (cooling pad, etc.) or for other special purposes.
  • The product does not emit hazardous gas when burnt; however, please request disposal by a professional vendor.

Product Inquiries

Furukawa Electric Power Systems Co., Ltd. (Japan)

2-11-16, Azamino-Minami, Aoba-ku, Yokohama-shi, Kanagawa 225-0012 Japan
TEL. +81-45-910-2814 FAX. +81-45-910-2839

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