New products
	Type : MP-B (black) Hardness : 75 Features : Standard product with resistance to many kinds of chemicals and excellent resistance to solvent. Improved mechanical strength/ductility and heat resistance compared with those of the conventional material (MP4275B)
	Type : MP-i (ivory) Hardness : 70 Features : Non-carbon dust product for semiconductors and LCD chambers. Improved mechanical strength/ductility and heat resistance compared with those of the conventional material (MP4270W)

	Type : MP-300B (black) Hardness : 75 Features : Super heat resistant.Able to provide a stable seal at temperatures up to 300 degrees C Chemical resistance inferior to the general-purpose Perfluoro.
	Type : MP-P (pearl) Hardness : 70 Features : Harmless metal ion product.Optimal for plasma etching.

Existing products
	Type : MP4275B (black) Hardness : 75 Features : Standard product that is resistant to many chemicals with excellent resistance to solvents. Better compression set than that of MP-B.
	Type : MP4270W (white) Hardness : 70 Features : Non carbon dust product for semiconductors and LCD chambers. Better compression set than MP-i.

Since the existing fluorocarbon elastomer, such as that in JIS Type 4 D material and MK-217, has carbon-hydrogen bonds in the polymer backbone chain, it is susceptible to polar fluids. On the other hand, Perfluoro has the carbon-hydrogen bond located inside the polymer backbone chain, so it has resistance against many kinds of fluids, both polar and non-polar, except fluoride fluids such as Freon.              Items Units MP-300B Competitors' products* MP-B MP4275B Original state property     Type A Durometer Hardness A75   A75   A77   A76   Tensile strength MPa (kgf/cm2) 12.0 (122)   16.9 (172)   16.0 (163)   12.5 (128)   Elongation % 230   150   170   120   100%Tensile stress MPa (kgf/cm2) 6.0 (61)   7.2 (73)   10.0 (102)   11.4 (116)   Aging test in heated air 250 degrees Cx70hr (P26 Oring) 230 degrees Cx70hr (JIS dumbbell) Hardness point/Δpoint A75 ±0 A73 -2 A79 +2 A73 -3 Tensile strength MPa/Δ% (kgf/cm2) 15.0 (153) +10 18 (184) +45 15.2 (155) -5 11.8 (120) -5 Elongation %/Δ% 220 +8 200 -33 230 35 160 +40 Aging test in heated air 275 degrees Cx70hr (P26 Oring) 250 degrees Cx70hr (JIS dumbbell) Hardness point/Δpoint A76 +1 A69 -6 A75 -2 A71 -5 Tensile strength MPa/Δ% (kgf/cm2) 14.0 (143) +10 18 (184) +45 13.6 (139) -15 9.3 (95) -26 Elongation %/Δ% 220 +8 200 -33 270 +61 240 +100 Compression set %   230 degrees Cx70hr (JISdisk) - - 23 Incapable of measurement 250 degrees Cx70hr (P26 Oring) 29 35 - - 300 degrees Cx70hr (P26 Oring) 40 50 - -   Items Units MP-i MP4270W MP-P Original state property     Type A Durometer Hardness A70   A72   A72   Tensile strength MPa (kgf/cm2) 13.8 (141)   9.8 (100)   16 (163)   Elongation % 210   150   200   100%Tensile stress MPa (kgf/cm2) 5.6 (57)   68 (69)   3.5 (36)   Aging test in heated air 230 degrees Cx70hr (JIS dumbbell) 200 degrees Cx70hr (JIS dumbbell) Hardness point/Δpoint A69 -1 A70 -2 A70 -2 Tensile strength MPa/Δ% (kgf/cm2) 14.2 (145) +3 8.2 (84) -16 16.5 (168) +3 Elongation %/Δ% 210 0 180 7 220 +10 Aging test in heated air 250 degrees Cx70hr (JIS dumbbell) 230 degrees Cx70hr (JIS dumbbell) Hardness point/Δpoint A71 +1 A67 -5 A71 -1 Tensile strength MPa/Δ% (kgf/cm2) 11.3 (115) -18 6.2 (63) -37 16.0 (163) ±0 Elongation %/Δ% 390 +86 250 +167 240 +20 Compression set %   230 degrees Cx70hr (JISdisk) 35 Incapable of measurement 40 250 degrees Cx70hr (P26 Oring) - - - 300 degrees Cx70hr (P26 Oring) - - -

 

■ The values given in this document are examples of actually measured values.  

※ Original state property values are quoted from the manufacturer's technical document. The O-ring tests were carried out by us.

■ Of the items in the above table, MP-B works a little better with inorganic acids, such as hydrochloric acid, sulfuric acid, nitric acid, fluorinated acid and phosphoric acid, with chemicals such as caustic soda, and under hot water or steam.

(Volume change)

With other solvents, there is almost no difference.  

 

 

 



 

General-purpose grade (ready for JIS B2401 Type 4) A general-purpose grade with excellent heat resistance and oil resistance. Note that it is hydrolyzed by hot water, steam and inorganic acids. Special grade[MK217] (Terpolymer) More resistant to inorganic acid than the general-purpose grade. Suitable for water-based chemicals. Also resistant to steam. Perfluoro (MPB, MP4275B) Chemically and thermally very stable since there is no carbon-hydrogen bond in the polymer backbone chain.

 

 

 

  

Chemicals Test conditions MPB/MP4275B (FFKM) NEXUS-217 (Three-way FKM) JIS Type 4 D (Two-way FKM) (Inorganic acid, organic acid) Hydrochloric acid (35%) 40 degrees Cx21d A A B Sulfuric acid (35%) 40 degrees Cx10d A A A Sulfuric acid (98%) 40 degrees Cx11d A A A Nitric acid (60%) 40 degrees Cx10d A A D Fluorinated acid (50%) 40 degrees Cx10d A A B Glacial acetic acid 40 degrees Cx21d A D D Acetic anhydride 40 degrees Cx21d A D D Formic acid (88%) 40 degrees Cx21d A (C) (D) (Inorganic alkalis) Sodium hydrate (30%) 40 degrees Cx8d A C (Erosion) Sodium hydrate (30%) 40 degrees Cx21d A D (Erosion) Sodium hypochlorite (10%) 40 degrees Cx21d A B C Ammonia water (28%) 25 degrees Cx21d A D D Ammonia water (28%) 40 degrees Cx21d A D D (Ketones esters, ethers) Acetone 40 degrees Cx21d A D (D) Methyl ethyl ketone 40 degrees Cx21d A D (D) Methyl isobutyl ketone 40 degrees Cx21d A D (D) Isophorone 40 degrees Cx21d A D (D) Diethylene carbonate 40 degrees Cx21d A D (D) Acetylacetone 40 degrees Cx21d A D (D) Methyl formate 40 degrees Cx21d A D (D) Methyl acetate 40 degrees Cx21d A D (D) Ethyl acetate 40 degrees Cx21d A D (D) Isoamyl acetate 40 degrees Cx21d A D (D) Methyl acetoacetate 40 degrees Cx21d A D (D) Acetoacetic ester 40 degrees Cx21d A D (D) Acrylic acid 40 degrees Cx21d A D (D) Methyl acrylate 40 degrees Cx21d A D (D) Diethyl oxalate 40 degrees Cx21d A D (D) Dimethyl maleate 40 degrees Cx21d A D (D) Triethyl phosphate 40 degrees Cx21d A B (D) Tricresyl phosphate 40 degrees Cx21d A B (D) Diethyl ether 40 degrees Cx21d B D (D) 1,4-dioxane 40 degrees Cx21d A D (D) Methyl-t-butyl ether 40 degrees Cx21d B D (D) Chemicals Test conditions MPB/MP4275B (FFKM) MK217B (Three-way FKM) JIS Type 4 D (Two-way FKM) (Furans, aldehydes) Tetrahydrofuran 40 degrees Cx21d B D D 2-methyltetrahydrofuran 40 degrees Cx21d B D D Acetaldehyde 25 degrees Cx21d B D D Furfural 40 degrees Cx21d A (C) (C) Furfural 100 degrees Cx7d A (B) (D) Acetophenone 40 degrees Cx21d A (C) (D) Formalin (35%) 40 degrees Cx21d A (B) (C) Formaldehyde 40 degrees Cx21d A D D (Nitrogen-containing compounds) Acrylonitrile 40 degrees Cx10d A A B Ethylenediamine 40 degrees Cx10d A D D Triethylamine 40 degrees Cx21d A D D Triethylenetetramine 25 degrees Cx21d A D D Aniline 40 degrees Cx21d A D D Pyridine 40 degrees Cx21d A C D N,N -dimethylformamide 40 degrees Cx21d A D D N,N -dimethylacetamide 40 degrees Cx21d A D D N-methyl-2-pyrrolidone 100 degrees Cx21d A D D 1,8-Diaza-Bicyclo- (5,4,0) -Undecene 40 degrees Cx7d A D D (Carbon hydrides, Halogenated hydrocarbons) N-hexane 40 degrees Cx21d A B B Cyclohexane 40 degrees Cx21d B B B Isooctane 40 degrees Cx21d B B B Decalin 40 degrees Cx21d A B B Benzene 40 degrees Cx21d A C D Toluene 40 degrees Cx21d A B C Xylene 40 degrees Cx21d A B C Ethyl benzene 40 degrees Cx21d A B B Nitrobenzene 40 degrees Cx21d A B B Monochloro toluene 40 degrees Cx21d A B C 1,2-Dichlorobenzene 40 degrees Cx21d A B C Chloroform 40 degrees Cx21d A C D Carbon tet 40 degrees Cx21d B C D Methylene chloride 25 degrees Cx21d A C D Trichloroethylene 40 degrees Cx21d A B C Tetrachlorethylene 40 degrees Cx21d B B C Tetrachlorethylene 100 degrees Cx7d B B C 1,2-dipromoethane 40 degrees Cx21d A B B R-113 25 degrees Cx11d D D C R-112 40 degrees Cx11d C C C Daifloil #10 (fluoro oil) 130 degrees Cx11d C C C Daifloil #1 (fluoro oil) 40 degrees Cx21d C C C FluorinertFC77 180 degrees Cx7d D C B Novec HFE7100 23 degrees Cx3d C C B Chemicals Test conditions MPB/MP4275B (FFKM) MK217B (Three-way FKM) JIS Type 4 D (Two-way FKM) (Alcohols) Mehtyl alcohol (methanol) 40 degrees Cx21d A B D Ethyl alcohol (ethanol) 40 degrees Cx21d A A B Isopropyl alcohol (propanol) 40 degrees Cx21d A A A Ethylene glycol 40 degrees Cx21d A A A Ethylene glycol 130 degrees Cx10d A (A) (B) Mehtyl Carbitol 40 degrees Cx21d A A (B) Ethyl Carbitol 100 degrees Cx7d A (B) (B) Cyclohexanol 40 degrees Cx21d A A (B) (Miscellaneous: oils, steam, etc.) Paint thinner 32 degrees Cx28d A D D Fire quell 130 degrees Cx11d A A B Fire quell 175 degrees Cx3d A (B) (B) DN cut HS-1 (cutting oil) 130 degrees Cx11d A (B) (D) Esso Uniflo 175 degrees Cx20d A (B) (C) O-148LCT (Aircraft engine oil) 175 degrees Cx20d A (B) (C) JIS No.1 oil (lubricating oil) 175 degrees Cx16d A A A ASTM No.3 oil (lubricating oil) 175 degrees Cx16d A A B LLC 50% water solution (Toyota Motor Corporation) 130 degrees Cx16d A A B Steam 150 degrees Cx30d A A (D) Steam 190 degrees Cx30d A B D Hot water at 95 degrees C 95 degrees Cx21d A A C The following data is for reference purposes. A : Volume increase Less than 5%   : Suitable B : Volume increase 5% to 20%   : Applicable, depending on the conditions C : Volume increase 20% to 50%   : Caution needed during use D : Volume increase 50% or more   x : Unsuitable The above data was obtained by soaking the test pieces and should be used only   as a guide. In addition, the data in parenthesis is estimated from the structure and the documents prepared by the manufacturers of the materials. Please be sure to consult about the conditions of use. In some cases, you might have to conduct a check using a sample on your own. In general, chemicals with a smaller carbon number of the hydrocarbon radical have   a better swelling effect.



 

 

 

* We carried out immersion tests on the general-purpose Fluorocarbon Elastomer with unavailable chemicals, that is, with chemicals whose volume swells by 50% or more or chemicals that are destroyed. The excellent chemical resistance is shown below. Volume swelling rate (room temperature x 10days) [Units : %]   MP300B MPB MP4275B MPi Acetic acid (99%)  0.0 1.0 1.5 1.0 Nitric acid (60%) 0.3 0.5 0.8 -0.5 Sodium hydrate saturated aqueous solution 0.2 0.8 0.5 0.0 Methyl ethyl ketone 1.4 0.9 2.2 1.1 Tetrahydrofuran 1.8 1.3 4.5 1.2 Ethylenediamine 1.8 -0.2 0.9 1.4 Carbon tetrachloride 2.0 -1.0 5.3 2.2 Methanol 1.3 0.9 2.1 1.2 1-methyl-2-pyrrolidone 1.2 0.6 0.4 -0.6

 

 

 

 

 

 

Heat-resistant materials [Units : %]     MP300B Heat-resistant materials manufactured by other companies 02=30sccm 180min Reduction in weight 4.4 11.2 Particle 0.1 0.2 02/CF4=15/15sccm 180min Reduction in weight 1.2 4.2 Particle 0.2 0.7 Power output : 500 W General-purpose material [Units : %]     MPB MP4275B MPi MP4270W MPP 02=30sccm 180min Reduction in weight 12.5 10.6 2.3 4.8 6.8 Particle 0.1 0.1 0.3 0.7 0.2 02/CF4=15/15sccm 180min Reduction in weight 2.5 1.6 3.2 4.4 6.3 Particle 0.7 0.2 0.7 0.7 0.4

 

 

 

 

* We carried out elemental analysis and semi-quantitative analysis using X-ray Fluorescence. The ratio among the detected elements in the measurement range of 11Nz to 92U is shown below. None of the samples contains harmful heavy metal. (Fe and Cr possibly originated in the stainless steel that came into contact with the samples during the manufacturing process.) MP-300B MP-B MP-i MP-P MP4275B MP4270W Units : %

 

 

 

 

 

 

The problems often encountered with the Perfluoro materials are shown below. Refer to these cases before use. Please refer to section on the causes of and countermeasure against O-ring failures at the end of our general-purpose material catalogue as well. Excessive impact Perfluoro is often used at high temperatures where its volume swells, thereby increasing the compression rate over the original rate at room temperature. Since it is not as strong as a general-purpose material, excessive compression may result in cracks. (The material in the photo is MP-i.) < Countermeasure > Improvement in compression rate High temperature Although Perfluoro has excellent heat resistance, it is merely an organic material and it deforms if it is used in an environment that goes beyond the limit. (The photo shows a sectional view of a sample deformed in the shape of groove. Material: MP-P) < Countermeasure > Change the material to MP-300B that has the best heat resistance. Flaw created during placement [Flaw] [cross-section of fracture] A minor flaw created during placement may result in rupture. (Although the general-purpose material also ruptures because of a minor flaw, closer attention needs to be paid in the case of Perfluoro as it not as strong.) Used for purposes other than an O-ring The photo shows the ruptured part of a Perfluoro O-ring that broke when it was used in a conveyor belt. It is composed in a way that it would be most suitable as a sealing material. If you use the product for a purpose other than sealing, please be sure to conduct your own check. (This is not a problem, but it can serve as a reference.) Used in an environment that caused plasma etching Although Perfluoro has the best heat resistance and chemical resistance of all synthetic elastomers, it becomes etched, as shown in the photo, if comes into direct contact with plasma. (This is not a problem, but it can serve as a reference.)