Document NmyjqQv7BnOgrYVnN0XznLry
Application
Number
Application
Name
Candidate
Substance CAS
RN to be
regulated
Name
of
Candidate
Substance to
be regulated
Generic Name
of
End
Product for
Application
Generic Name
of Part for
Application)
Description
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Application
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Explanation
of
Irreplaceabl
e Technology
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Data,
Information
on Reference
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etc.)
Shipping
Volume
Information)
E.2.10 (Transport Aircraft)
PTFE-containing composite packings, fluorine-based elastomer seal materials 9002-84-0
gaskets,
PTFEfluororubber Piping, valves, pumps, vessels
(Seat gaskets, fluorine-based elastomers O-rings, gland packings)
"VALQUA_Group_Sustainability_Report_2022(extract)r1 " "zm01_2007_Elastomer(extract)r2" "zy03_0611_Gland_Packing(extract)r2" "zy03_1601_Gasket(extract)r2"
Materials that can be used for seal members are selected according to the temperature and fluid.
In specifications where fluorine-based materials are used, temperatures of 150C or higher, resistance to fluid, or purity is required, and they are expensive, but are used because they cannot be substituted with other materials.
(see catalogs for the upper section)
The amount of raw materials used for this product in Japan for the applications is estimated to be 2,700 ton/year for both fluororubber and fluorine resin (based on statistical data from the Japan Fluoropolymers Industry Association.
The amount used in one product is <20~50% by weight, which has a huge impact on the transportation sector where it is used.
Applications include valves, piping, and fittings in transport aircrafts.
Without this part, operation would be impossible, as they are mainly used for hydraulic piping lines for fuel and equipment operation.
(Impact on industry) The following three examples are given within the transport aircrafts sector. In both of the case where the product is used inside and the case where manufacturing plants are operated to produce it, production would be impossible without this part, which would have a significant impact.
Heat Resistance (Highest Working Temperature) Weather Resistance Chemical Resistance
NonAdhesiveness Purity
PVC
PP
HighDensity PE Silicon Resin
Silicon Rubber
EPDM
NBR (NBR (Nitrile Rubber) PEEK (Polyether Ether Ketone) Remarks
260C (PTFE), 200C (fluororubber)
No influence of direct sunlight
Stable against most chemicals. Slightly affected by molten alkali metals
(solutions), high-temperature fluorine, and chlorine trifluoride.
Wet resistance (Contact angle with water 110)
No impurities are eluted (ppb level or less) when in contact with chemicals Heat resistance < 90C Heat resistance < 130C Heat resistance < 70C
Silicone resin is inferior in solvent resistance, chemical (strong acid and strong alkali) resistance, and water resistance Silicon rubber is inferior to fluororubber in mechanical strength and solvent resistance when used as a seal member Heat resistance < 150C, EPDM is inferior to fluororubber in oil resistance Heat resistance) < 130C, NBR is inferior to fluororubber in oil resistance
Heat resistance < 240C, (PEEK is inferior to PTFE in acid resistance.) PEEK is basically injection-molded, and cannot be blended with materials Heat resistance https://www.kda1969.com/study/study_pla_compare.htm Chemical resistance https://www.kda1969.com/study/study_pla_chem.htm List of physical properties of rubber https://www.kayocorp.co.jp/common/pdf/rub_propertylist.pdf