Mold our passion into shape■Sales dept.
Membrane
Sales Dept.

ATT New Tower 10F, 2-11-7, Akasaka, Minato-ku, Tokyo
107-0052 JAPANTEL +81-3-6230-4424 FAX +81-3-6230-4446■Head office & branches
Head Office ATT New Tower 10F, 2-11-7, Akasaka, Minato-ku, Tokyo
107-0052 JAPANTEL +81-3-6230-4414 FAX +81-3-6230-4413
Otemon Pine Building, 5F, 1-1-12, Otemon, Chuo-ku,Fukuoka
Head Office Fukuoka 810-0074 JAPANTEL +81-92-724-1414 FAX +81-92-724-1413
TokyoBranch

ATT New Tower 10F, 2-11-7, Akasaka, Minato-ku, Tokyo
107－0052, JAPANTEL +81-3-6230-4411 FAX +81-3-6230-4412

NagoyaBranchNishiki Park Building, 10F, 2-4-3, Nishiki, Naka-ku,
Nagoya 460-0003, JAPANTEL +81-52-229-1511 FAX +81-52-229-1512

Osaka
BranchNissay Shin-Osaka Bldg., 16F, 3-4-30, Miyahara,
Yodogawa-ku, Osaka 532-0003, JAPANTEL +81-6-6398-6714 FAX +81-6-6398-6712

Fukuoka
BranchOtemon Pine Building, 5F, 1-1-12, Otemon, Chuo-ku,
Fukuoka 810-0074, JAPANTEL +81-92-724-1411 FAX +81-92-724-1412

TMCHUKOH FLO
TMSKYTOP FGT Series
Chukoh Chemical Industries, Ltd.

ISO 9001 and 14001 certified
Chukoh Chemical Industries has been certified under ISO 9001 and14001, which are international standards for quality and environmentalmanagement.
■Scope of registration / Design, manufacture, and sale of products
containing fluororesin and products with fluororesin or silicone resin
coatings. Design and management of consignment manufacturing of
biodegradable resin products.

Contact Information

For inquiries on our products in general, please make inquiries bye-mail. Please feel free to contact us.

mail : support@chukoh.co.jp
Caution● Do not use for medical applications or other usages involving a contact with human body.
● Observe the related laws and regulations for disposal. Do not incinerate in any case.
● Do not use at the temperature exceeding the maximum service temperature.
● Please read the catalogue and product safety data sheet (SDS) on our website tomaintain the original functions of product and ensure safe use.

www.chukoh.com/Mar/1/2022 DC(6)What isFluoropolymer
Membrane

Pioneer of the Membrane Structure era of Japan.
Since our foundation as a manufacturer of all kinds of fluoroplastic products, we have always
made great effort to develop new products and novel technologies.
Above all, our fabric products, fluoroplastic coated glass cloths, are evaluated as top products
worldwide in both quality and the scale of production.
We developed permanent architectural membrane materials for roofs, SKYTOP products, forthe first time in our country by capitalizing on the manufacturing technologies of these fabricproducts.
The full-fledged membrane structure age in our country began with our SKYTOP products.
The safety and functionality of SKYTOP Architectural Membranes have been verified by a long
history of successful projects in many countries.

Suvarnabhumi International Airport ／ Thailand

Types of Membrane Structures

Advantages of Membrane Structures

Framed Membrane Structure

Saving of Energy Cost

Flexible Design Spreading Image

Suspension Membrane Structure

Comfortable Space Filled with Natural Light

Everlastingly Clean Appearance

Types of framed structures that are composed of frames formed into threedimensional shapes such as mountain-shapes, arch-shapes, etc. and membranematerials covering those frames as roofs and walls.

Types of structures that use suspending membrane materials as their main
structural elements.

Air-supported Structure

Types of Structures that are supported by air fed into space totally covered withmembrane materials.

SKYTOP products have the high reflectivity and low absorption
rate of sunlight as well as small heat capacity. So, the influx ofsolar energy into the inside of buildings is held low.

The sunlight through SKYTOP changes into naturally diffusedlight with faint shadows, so that you can see things in their
original colors that they have outdoors. In addition, since
SKYTOP let in enough amount of light to grow plants indoors,
comfortable spaces with outdoor feelings can be obtained.

Since membrane structures generally cover large space withmembrane materials without using internal support elements,
flexible design and versatile space utilization are realized.

Thanks to the anti-stick property and water repellency offluoroplastics, dust and smudge piled up on the SKYTOP
surface are washed away every time it rains.
As a result, the SKYTOP surface is kept clean and white.

Characteristics

Incombustibility

Thermal Properties

SKYTOP products, which are composedof incombustible polytetrafluoroethylene(PTFE) resins and glass cloths properties
have excellent incombustibility.

The original white color of SKYTOP
reflects most of the solar energy, so, theinflux of heat into the building isminimized. In addition, the adoption of
the double-layer membrane structures,
which use inner membrane materials,
further improves the thermal insulation
effect under air-conditioning.

Toughness
In general, as the diameter of the fiber
filament decreases, its tensile strength
per unit area increases and its diameterof loop decreases. Since SKYTOP uses
B filaments that are currently the finest
glass fiber filament in the world, thesufficient strength and safety ofmembrane structures are ensured when
the structures are composed of SKYTOP
products.

4.0D

2.0120Sound Absorption Property
Since Interior membrane materials havemoderate flexibility and air permeability,
they give excellent sound absorption
property to the membrane structures.
The adoption of them as inner
membranes of double-layer membrane
structures will enhance acoustic effects
inside the structures.

3691218

Loop Diameter(μm)

10060

D40DEEB

20

Filament Diameter (μm)

0369121518

Filament Diameter vs. Loop Diameter

Rate ofReﬂection
80%

Solar Energy
100%

Rate ofTransmission
12%
Indoor Illuminance 1,300 lx

Indoor Illuminance（FGT-800）

Solar Energy
100%
Rate of Reﬂection 80%（放射率4%）
Rate ofemission 4%

Rate ofemission 4%

Rate of Transmission 12%

100

StructuralMaterials
Main Gradesof SKYTOPTM

FGT-250-1
FGT-800

20FGT-800

10０2００

FGT-250 Series

1006００

10００

14００

18００

ISO 2286-2

4400

3520

2940

4000

2820

2350

8200

7000

5800

7500

6000

4600

360

260

200

400

260

200

500400350550

400

380

Warp

N/2.5cm

Fill
Warp

Tensile Strength（minimum）

N/5cm

FillWarp

N

Fill
Warp

N

Fill

22００

Solar Reflectance（％）

FGT-250-1

40

FGT-250B

Wavelength
（nm）
10００

Solar Reﬂectance

ASTM D 4851

DIN 53363

101215

ASTM E 424

Solar Reﬂectance after
bleaching（nominal）%

828078ASTM E 424

Unit

FGT-250-1

FGT-250A-1

Test Method

Thickness（nominal）

mm

0.350.40

ISO 2286-3

Weight（nominal）

g/m²

470

600

ISO 2286-2

1920

1640

1440

1250

3600

3000

2700

2300

170

110

100

80280

190

180

140

Warp

Tensile Strength（minimum）

N/2.5cm

FillWarp

Tensile Strength（minimum）

N/5cm

FillWarpN

FillWarp

Tear Strength（minimum）

N

Fill

ASTM D 4851

ISO 1421 or
DIN 53354

ASTM D 4851

DIN 53363

Solar Transmission after
bleaching（nominal）

%

1918

ASTM E 424

Solar Reﬂectance after
bleaching（nominal）

%

7878

ASTM E 424

cm³/cm²・s8

̶JIS L 1096

0.45

̶

JIS A 1409

Air Permeability（nominal）

NRC

Fire Performance

FGT-1000

FGT-800

FGT-600

FGT-250

Test Method

Pass

Pass

Pass

Pass

ASTM E 136

Burning characteristics

Flame spread0000

Smoke density

15055ClassA

ClassAClassA-

Large scale

Pass

Pass

Pass

Pass

Small scale

Pass

Pass

Pass

Pass

Pass

Pass

Pass-BS 476 Part 4Fire resistance of roof coverings

14００

18００

22００

ASTM E 84
ASTM E 108
NFPA 701

PPP-BS 476 Part 5Fire propagation

I=3.5

I=2.8

I=2.2

-

BS 476 Part 6

Spread of flame

Class 1

Class 1

Class 1-Pass

Pass

Pass

Pass

Class B1

Class B1

Class B1

Class B1

Ignitability

Incombustibility certification

206００

ISO 1421 or
DIN 53354%

Non-combustibility of substrates
FGT-800

60０2００

ASTM D 4851

Solar Transmission afterbleaching（nominal）

Flame resistant80

FGT-250A-1 Airtight Type

1000

Wavelength（nm）

Solar Transmission

FGT-250-1 Standard Type1300

Incombustibility of substrates

For large-scale Structures

For Small-scale or
Medium-scale Structures

InteriorMaterials

FGT-250B

60

30

FGT-600

1700

Obtained Certifications

7040

For large-scale or
Medium-scale Structures

g/m²＊Values shown above are standard values.

Solar Transmission（％）

50

FGT-1000（nominal）

Sound Absorption
Coeﬃcient（nominal）

80

Tochigi Sports Park Athletics Stadium / Tochigi

WeightTear Strength（minimum）

90

Glass Fiber B yarn

ISO 2286-3

SKYTOP (FGT-800)

Solar Energy Balance（FGT-800）

Glass Fiber B yarn

0.60

Items

SKYTOP FGT-800

PTFE

0.80

Interior Materials

Rate of Absorption 8%(Cross-sectional view)

Test Method＊Values shown above are standard values.

Outdoor Illuminance
10,000 lx

The Structure of SKYTOPTM

FGT-600

1.00

Tear resistance（minimum）

G80

FGT-800mm

Tear Strength（minimum）

K

FGT-1000（nominal）

Tensile Strength（minimum）
15

Filament Diameter vs. Tensile Strength

UnitThickness

Filament Diameter (μm)

0.00

As SKYTOP is fully coated with PTFE
resins, it is unaffected by ultraviolet lightand airborne pollutants. Therefore, it iscapable of maintaining the function andsafety as a roof material for a longperiod.

Dust and airborne pollutants that are
deposited on the SKYTOP surface are
washed away every time it rains, so that
the SKYTOP surface is kept clean
everlastingly without any special
cleaning.

GK

140

SKYTOP is translucent, so that sufficientnatural light to grow plants can beobtained inside the structures. Since thelight through SKYTOP changes into
naturally diffused light with faintshadows, inner space with soft feelings
can also be created.

DEE

1.0

Weatherability

Self-cleaning Property

Items

3.0160

Solar Transmission

Structual Materials

BTensile
Strength(GPa)Fire behaviour of building materialsand elements＊For other grades, please contact us.

BS 476 Part 7

Building Standard
Law of JapanDIN 4102

■2001 ～ 2010

SKYTOP™
Architectural Membrane
Structures
SKYTOP is used in various buildings around the world by advantage of its excellent features
such as dirt-resistant, lightweight and flexible design.

■Jeju World Cup Stadium■Nelson mandela Bay Stadium■YasMarinaCircuit■Motosumiyosi Station■Shanghai Pudong International Airport■Pompidou Centre Metz

Completed：2001■1987 ～ 2000

■Tokyo Dome
Completed：1987

Location: Tokyo

Completed：2006

Location: Korea

Location: Kanagawa

Completed：2007

Completed：2006

Location: Republic of South Africa

Location: China

Completed：2008

Completed：2010

Location: Abu Dhabi

Location: France■2011 ～ present■Shellcom Sendai
Completed：1999■Kokura Racecourse

Location: Miyagi

Completed：1995

Location: Fukuoka■Kanaya Kindergarten
Completed：2014■Kashima Soccer StadiumCompleted：2000

Location: Ibaragi■Ecopa StadiumCompleted：2000

Location: Shizuoka■Yamaguchi Prefectural Kirara Park
Completed：2000

Location: Yamaguchi

Location: Fukushima■Hakata Station■J-VILLAGE All-weather football practice field■Takanawa Gateway Station■Nagasaki Prefectural Sport StadiumCompleted：2011

Location: Fukuoka

Completed：2018

Location: Fukushima©TIAT■Inzai Elementary School
Completed：1991

Location: Chiba■Inazawa Station
Completed：1999

Location: Aichi■Koriyama Station Taxi Stand
Completed：1999

Location: Fukushima

Completed：2020

Location: Tokyo

Completed：2013

Location: Nagasaki■Haneda Airport Terminal 3
Completed：2013

Location: Tokyo