AFLAS TM




AFLASTM The Fluoroelastomer


In the automobile and chemical plant application, end users require ever higher performance for rubber parts. In some cases, conventional rubber can no longer satisfy customers' higher standard requirements.

AflasTM was developed by Asahi Glass and commercialized in 1975 to supply outstanding heat and chemical resistance to the new demand for superior rubber.

AflasTM has its unique chemical structure (based on tetrafluoroethylene and propylene alternating copolymer), different from conventional FKM (based on vinylidenefluoride and hexafluoropropylene), which gives AflasTMoutstanding chemical resistance and electrical properties.



Contents
  • Characteristics
    •
  • Grades
    •
  • Structure & Properties
    •
  • Standard Compounding Formulation
    & Mechanical Properties
    •
  • Newly Developed Fluoroelastomer
    •




    Characteristics

    1. Excellent heat resistance
    Propylene unit is completely arranged between the neighboring trafluoroethylene units. This structure provides excellent heat resistance even with a lower fluorine content. It is possible to use Aflas TM continuously for three months at 230°C and 30 days at 260°C. It can be used at 300°C for a short time.

    2. Excellent chemical resistance
    Because of its stable chemical structure, AflasTM has very good chemical resistance against high concentration of acid /alkali / oxidant under high temperature. It is superior in this property to the conventional FKM.

    3. Excellent electrical properties
    Because of its unique structure, AflasTM provides very good electrical properties which conventional FKM cannot supply. Its electrical properties are similar to those of silicone or EPDM rubber which are widely used to make insulation walls for cables. However, AflasTM provides even better heat resistance than those materials. This has resulted in the continued expansion into newer areas year by year.


    Contents




    AFLASTMTFE Elastomer Grades

    Grade ML+10 at 100°C
    Mooney Viscosity    		 Application
    150L 35 Tank lining or as a viscosity modifier
    in blends with other AFLASTM grades.
    Generally not used for molding.
    150E 60 Used primarily for high speed extrusion,
    such as wire and cable jacketing.
    Also used for calendering.
    150P 95 A general purpose grade,
    for a wide variety of molding,
    calendering, and extrusion.
    150C 951? Used primarily for extrusion as wire and cable jacketing.
    100S 1601? Used primarily for compression molded goods.
    Provides the best overall physical properties.
    100H 1101? Used for compression molded goods
    used under severe environments.
    SP 75 Used primarily for compression molded goods.
    Provides improved processability of 100 series.
    MZ201 50 A general purpose grade, for a wide variety of molding, calendering, and extrusion. Low hardness is possible.
    1) False Mooney value due to rotor slippage.




    AFLASTMTFE Elastomer: Structure and Properties

    Structure
    AFLASTM 100/150 AFLASTM SP, MZ201

    -(CF2-CF2)m-
    (CH2-CH)n-
    |
    CH3
    (CF2-CF2)l-
    (CH2-CH) m-
    |
    CH3
    (CH2-CF2)n-










    Contents

    Properties

    Item AFLASTM
    100/150    		 AFLASTM
    SP    		 AFLASTM
    MZ201
    Raw Gum Specific Gravity 1.55 1.50 1.58
    Fluorine Content (%) 56 55 59
    Glass Transition
    Temperature (°C)    		 -3 -3 -13
    Vulcanization1/ Volume Resistivity
    (V·cm)/A    		 3 x 1016 3 x 1014 4 x 1013
    Dielectric
    Constant at 1 kHz    		 3.0 4.0 5.9
    1) Non-filler Formulation


    Compounding Formulation and Mechanical Properties

    Grade 100S 150P 150E SP2? 200S1? MZ2013?
    Mooney Viscosity MLM10 at 100°C 160 95 60 75 60 50
    Formulation
    (Rate)    		 Polymer 100 100 100 100 100 100
    Peroxide1? 1 1 1 1 1 --
    Triallyl
    Isocyanurate    		 5 5 5 3 3 --
    Sodium Stearate 1 1 1 -- -- --
    Calcium Hydroxide -- -- -- 6 -- 3
    Magnesium Oxide -- -- -- 3 -- 3
    MT Carbon Black 30 30 30 30 25 30
    Vulcanization Press Cure: °C/min 170/20 170/20 170/20 170/20 170/20 170/20
    Post Cure: °C/h 200/4 200/4 200/4 200/4 200/4 230/24
    Mechanical
    Properties    		 Tensile
    Strength :MPa     		21.0 18.1 14.6 18.2 19.9 13.7
    Elongation: % 320 260 300 220 190 210
    Modulus at 100%
    Elongation: MPa    		 4.5 4.4 4.0 7.9 25.9 6.1
    Hardness (Shore A) 72 72 71 76 68 74
    Compression Set %,
    70h at 200°C    		 26 29 32 30 25 30
    1) 1,3-bis-(t-butylperoxy) diisopropyl benzene

    2) & 3) Specific vulcanization promoter incorporated

    Contents



    AFLASTM SP

    A Newly Developed Fluoroelastomer with:

    · Improved curability
    · Easy mold release
    · Strong adhesion to metal (with AGC's primer) and distinguished
    chemical resistance inherited from the AFLASTM origianl polymer

    Structure & Properties of AFLASTM SP

    Polymer Structure
    -(CF2-CF2)l-

    		 (CH2-CH) m-
    |
    CH3    		 (CH2-CF2)n-


    Properties

    Specific Gravity 1.50
    Fluorine Content (%) 55
    Mooney Viscosity
    (ML 1+10 at 100°C)    		 75
    Cure System Peroxide




    Typical ODR curves of AFLASTM SP and 150P vulcanized by peroxide.
    Measured at 177    °C, with a microdie, non-preheated, with oscillator frequency of 1.66Hz and 3°(as arc).






    Contents



    Oil Resistance of AFLASTM SP

    Polymer SP 150P FKM1?
    Initial Properties

    Hardness:JIS-A
    100% Modulus:MPa
    Tensile: MPa
    Elongation: %

    76
    7.9
    18.1
    220

    70
    6.2
    20.9
    260

    70
    2.9
    23.7
    350
    SJ-Engine Oil, 175°C×1000h

    Hardness: JIS-A (Points Changed)
    100% Modulus: MPa (% Retained)
    Tensile: MPa (% Retained)
    Elongation: % (% Retained)

    Volume Change (%)

    71(-5)
    7.5(-3)
    16.5(-8)
    180(-16)

    7.5

    65(-5)
    3.8(-37)
    17.9(-12)
    255(-1)

    7.3

    73(3)
    3.5(20)
    5.1(-79)
    145(-59)

    1.2
    Gear Lube, 175°C×1000h

    Hardness, JIS-A (Points Changed)
    100% Modulus, MPa (% Retained)
    Tensile, MPa (% Retained)
    Elongation, % (% Retained)

    Volume Change (%)



    65(-11)
    7.7(-1)
    14.4(19)
    200(-9)

    8.2

    64(-6)
    3.8(-37)
    15.9(-22)
    260(1)

    5.0

    8(8)
    -
    3.3(-86)
    80(-78)

    1.0
    1) VdF/HFP/TFE - peroxide cure

     

    Retention of the tensile strength and elongation of AFLASTM and FKM terpolymer (fluorine content 69 %, peroxide vulcanizable) when immersed in SJ-class engine oil at 175 °C.






    AFLASTM SP Applications


    Before use of this product, we urge the careful reading of the appropriate Material Safety Data Sheet (MSDS). Technical information brochures are available for some products. For the safe use of the product, one must abide by the use method and the purposes described in the relevant brochure and MSDS. Please note that the brochure and MSDS are based on the latest information and data available, but additional and/or corrections may be made, from time to time, without notice when new data becomes available and/or regulations are changed. Feel free to contact us directly and/or the selling agency if you have any questions.



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