Coating Powder NEOFLONTM - Daikin Industries Fluoroplastics

Product Information
                      Daikin Industries

                        NEOFLON                                           TM

                       Coating Powder

                      NEOFLON Coating Powder is a high performance material
                      made from fluoropolymer resin.
                      Two kinds of NEOFLON Coating Powders, NEOFLON FEP,
                      and PFA Coating Powder, are available.
                      NEOFLON FEP Coating Powder is a fine powder made of
                      tetrafluoroethylene and hexafluoropropylene copolymer and
                      NEOFLON PFA Coating Powder is a fine powder made of
                      tetrafluoroethylene and perfluoroalkylvinylether copolymer.
                      NEOFLON FEP and PFA Coating Powder are low in melt
                      viscosity and excellent in melt fluidity which can give a
                      coating free of pinholes.
                      NEOFLON FEP and PFA are ideal for use as corrosion
                      resistant linings because of their excellent thermal and
                      chemical resistance properties.

                      TM: DAIKIN INDUSTRIES trademark for its Fluoroplastics
1. Features of
   NEOFLON Coating
    1-1 Processability   1) A thick coat can be obtained for lining purposes
                            When the appropriate processing conditions are selected, a coating
                            thickness can be obtained with NEOFLON Coating Powder.
                            The advantages of this are reduced processing time, and a superior
                            capability for use in heavy corrosion resistance application.
                            See table 1 for the thickness which can be obtained:

                         Table 1
                                                                         FEP (NC)        PFA (AC)
                                              Film thickness per
                                              application                300 ~ 500       300
                          For electrostatic   (µm) Max.
                          coating             Film thickness by multi-
                                              applications               Approx. 2,000   Approx. 1,000
                                              (µm) Max.
                                              Film thickness per
                          For Roto moulding   application                500 ~ 5,000     500 ~ 5,000

                         2) A wide range of processing conditions is possible
                            The temperature range for processing of NEOFLON Coating Powder is
                            320 ~ 360°C.
                            This wide range greatly facilitates processing.

                         3) Processing methods are extremely simple
                            The following general powdercoating methods are applicable.
                            z Electrostatic spray coating
                            z Spray coating
                            z Rotational molding
                            z Rotational lining

    1-2 Coating film     1) Excellent resistance to stress cracking
        properties       2) Excellent resistance to chemicals
                         3) Excellent thermal resistance
                         4) Excellent anti-stick property
                         5) Excellent electric property, weather resistance and incombustibility.

2. Grades of         NEOFLON Coating Powder are available in the following grades depending
                     on processing method.
   NEOFLON Coating
                     Table 2 NEOFLON FEP Coating Powder Grades
                     Product Appearance Feature          Color   Processing       Processable Application
                     No.                                         methods          thickness
                     NC-      White         High purity clear    Spray coating. 100 ~      Topcoat for
                     1500     powder        product              Electrostatic- 300 µm     corrosion-
                                                                 coating                   resistant lining
                                                                                           Anti-stic coating
                     NC-      Graynish     Wide       black      Spray coating. 100 ~      Undercoat for
                     1519     white powder processing            Electrostatic- 2,000 µm corrosion-
                                           window.               coating.       High build resistant lining

                     NC-      Graynish     Excellent     black   Spray coating. 100 ~         Under and top
                     1539     white powder corrosion             Electrostatic- 2,000 µm      coat for
                                           resistance            coating.       High build    corrosion-
                                                                                type          resistant lining
                     NC-      White         High purity clear    Roto moulding 500 ~          Container
                     1810     powder        product              Roto lining.  5000 µm        Corrosion-
                                                                                              resistant lining

                     NCX-1 White            Thin build   clear   Electrostatic-   30 ~        For slight
                           powder           type                 coating.         80 µm       Corrosion-
                                                                                              resistant lining

                     Table 3 NEOFLON PFA Coating Powder Grades
                     Product Appearance Feature          Color Processing    Processable Application
                     No.                                       methods       thickness
                     ACX-    White      Thin build       clear Electrostatic-30 ~        IH Rice cooker, OA
                     31      powder     type                   coating       80 µm       rool. For slight
                     AC-       White        Good        clear Spray          100 ~       Topcoat for
                      5600     powder *     leveling          coating        300 µm      corrosion- resistant
                                            property          Electrostatic-             lining and anti-stick
                                                              coating                    coating
                     AC-       Gray powder High build black Spray            100 ~       Under, top coat for
                      5539                  type              coating        1,000 µm corrosion- resistant
                                                              Electrostatic-             lining
                     AC-       White        High purity clear Roto           500 ~       Container
                      5820     powder *     product           moulding       5,000 µm Corrosion-
                                                              Roto lining                resistant lining
                     * AC-5600, 5820, are pure PFA
                     PFA thin-coat types and ETFE Coating powder are also available. Please consult your
                     dealer of DAIKIN INDUSTRIES.

3. NEOFLON Coating
   Powder Properties

    3-1 Powder Properties    Table 4 Powder
                             Items   Measuring method Unit        NC          NC          AC          AC
                                                                                          (for spray) (for roto)
                              Apparent JIS K6891           g/ml   0.55 ± 0.10 0.90 ± 0.15 0.55 ± 0.10 0.90 ± 0.15
                              Particle (Laser diffraction) µm   55 ± 35      210 ± 60      45 ± 25      200 ± 50
                              Melting NC:ASTM D2116 °C          265 ∼ 275 255 ~ 275        303 ~ 313    303 ∼ 313
                              point     AC:ASTM D3307
                              Melt      NC:ASTM D2116 g/10 min 0.8 ∼ 1.5     4~8           1~7          5~7
                              index     AC:ASTM D3307
                             (1) NC-1500, 1519, 1539 (2) AC-5600, 5539 (3) AC-5820

    3-2 Coating Properties   Table 5 Coating
                             Items              Measuring method Unit                  NC (FEP)      AC (PFA)
                             Specific gravity ASTM D792               g/ml             2.12 ~ 2.17   2.12 ~ 2.17
                             Hardness           Durometer             shore            D55 ~ D65     D60
                             Taber abrasion (Against CS-17)           mg/1000r         3 ~ 16        5 ~ 15
                             Coefficient        (Bowden Leben                          0.05 ~ 0.08   0.05 ~ 0.08
                             friction (Static)  method)
                             Contact angle
                                  Water         Goniometer            (Degree)         105           102 ~ 106
                                  Hexadecane                                           50            65
                             Adhesive                                 kN/m             4~6           4~6
                             strength *
                             Tensile strength JIS K6888               MPa              26.5 ~ 32.4   19.6 ~ 31.4
                             Elongation         JIS K6888             %                310 ~ 360     250 ~ 350
                             * method: Peel Test
                                        Test piece 1) steel substrate are roughened with 80 ~ 120 mesh sand
                                                   2) applied two coat primer EK-1083G,EK-1883GB
                                                   3) applied NEOFLON Coating Powder into 500 µm thickness.

3-3 Chemical resistance   1) Adsorption of chemicals
    of coating               Figure 1 and Table 6 show the results of chemical adsorption when
                             fluoropolymer coatings are immersed in chemicals for the condition
                             Suitability of the coatings can be determined to a certain degree by the
                             adsorption curves shown in Figure 1.
                             As is shown in Table 6, the adsorption volume of NEOFLON is extremely
                             low in comparison to other fluoropolymer coatings.
                          Immersion conditions: 50 days at 95°C
                          Chemicals: 98% sulfuric acid,
                                         36% hydrochloric acid,
                                         60% nitric acid,
                                         50% sodium hydrooxide,
                                         28% aqueous ammonia, toluene, diethylamine, chloroform,
                          Figure 1 Chemical Adsorption Curves

                                                                          A or below:       Excellent
                                                                          A ~ B:            Sufficient for use
                                                                          B ~ C:            Applicable depending
                                                                                            on conditions
                                                                          X, Y:             Not applicable

                          Table 6 Chemical Resistance Comparsion
                                       A or below         A~B          B~C                       X, Y
                          NEOFLON      All chemicals      Chloroform
                          FEP          except
                          and PFA      chloroform
                          NEOFLON      Sulfuric acid,                  Ammonia                   Nitric acid,
                          ETFE         hydrochloric acid,              chloride, acetone,        chloroform
                                       sodium hydro                    toluene,
                                       oxide                           diethylamine
                          NEOFLON      Hydrochloric acid               Chloroform                All chemicals
                          VDF                                                                    except the ones
                                                                                                 described on the
                          NEOFLON      All chemicals      Toluene                                Chloroform
                          CTFE         except toluene
                                       and chloroform
                          ECTFE        Sulfuric acid,                  Acetone,                  Nitric acid,
                                       hydrochloric acid,              toluene,                  aqueos
                                       sodium hydro                    diethylamine              ammonia,
                                       oxide                                                     chloroform

2) NEOFLON Coating Chemical Resistance
       The chemical resistant properties of NEOFLON Coating are listed below:

    Table 7
    Chemical                              NC-1519                                *1
    Sulfuric acid (98%)                     Excel           Excel              Excel
    Hydrochloric acid (36%)                 Good             Excel             Excel
    Nitric acid (60%)                       Good         Excel or Good         Excel
    Hydrofluoric acid (40%)                 Excel           Excel              Excel
    Chlorosulfonic acid                     Excel           Excel              Excel
    Chromic acid (40%)                      Excel           Excel              Excel
    Perchloric acid                         Excel           Excel              Excel
    Formic acid                             Excel           Excel              Excel
    Citric acid (40%)                       Excel           Excel              Excel
    Glacial acetic acid                     Excel           Excel              Excel
    Trichloroacetic acid                    Excel           Excel              Excel
    Chlorine water                          Poor             Good              Excel
    Soda hypochlorite                       Excel           Excel              Excel
    Potassium permanganate (20%)            Excel           Excel              Excel
    Aluminum chloride (25%)                 Excel           Excel              Excel
    Ammonia chloride (25%)                  Excel           Excel              Excel
    Aqueous ammonia (28%)                   Excel            Excel             Excel
    Sodium hydro oxide (50%)                Excel            Excel             Excel
    Benzene                                 Excel           Excel              Excel
    Toluene                                 Excel           Excel              Excel
    n-butylamine                            Excel           Excel              Excel
    Diethylamine                            Excel           Excel              Excel
    Morpholine                              Excel           Excel              Excel
    Chloroform                              Good             Good              Good
    Trichloroethylene                       Good             Good              Good
    Acetone                                 Excel           Excel              Excel
    Methyl ethyl ketone                     Excel           Excel              Excel
    Ethyl acetate                           Excel           Excel              Excel
    Ethyl cellosolve                        Excel           Excel              Excel
    Ethyl carbitol                          Excel           Excel              Excel
    Ethylene dichloride                     Excel           Excel              Excel
    Ethylene oxide                          Excel           Excel              Excel
    Ethyl alcohol                           Excel            Excel             Excel
    n-hexane                                Excel           Excel              Excel
    After 50 days at 95°C                                           (Film thickness: 1 mm)

    Explanation of symbols
      Excel: Not affected at all
      Good: Affected more or less, but suitable
          Fair: Care should be needed, but suitable
          Poor: Unsuitable
          *1: NC-1539 and AC-5539 are used for middle layer NC-1500 is overlaid on NC-
                1539 and AC-5600 is overlaid AC-5539 in 200 ~ 300 µm thickness.
      Running temperature or Testing temperature:
          In case of NC family in acids and alkalis, it is under 150°C, and in case of AC
          family, it is normally under 180°C, but it will be lowered by containing organic
          solvents. Regarding using temperature, it is recommended to test actually by use
          of test pieces and chemicals.

4. Processing of
   NEOFLON Coating
  4-1 Coating        NEOFLON Coating Powder can be apply by spraying, electrostatic,
                     fluidized bed, Roto molding methods, etc.

                     1) Processing steps of NEOFLON Coating Powder (For spraying)

                                                                   Machine corners to a radius of 5 to 10 mm and
                                     Base material                 eliminate pin holes from the welded part.

                                  Degrease and baking              Remove oil and grease from the surface of a base

                                                                   Roughening the surface of a base material by sand
                                  Roughening surface               blasting or grid shot.

                                                                   First layer: EK-1083GB (needed only for steel and
                         Under-coating with under-coating paint                 stainless steel materials)
                                                                   Second layer: EK-1883GB

                                         Drying                    First layer: 80 ~ 90 °C × 10 min. or more
                                                                   Second layer: 80 ~ 90 °C × 10 min. or more

                                        Sintering                  First layer: 380 °C × 10 min.
                                                                   Second layer: 380 °C × 30 min.

                                        Cooling                    Under 40 °C
                                                                   (Coating condition for EK-1883GB)

                         NEOFLON Coating Powder (repeat coating)   Electrostatic coating


                                        Cooling                    Water cooled, air cooled, or furnace cooling is


Table 8 Appropriate Sintering Conditions for Each Grade
    Middle sintering     340 ~ 350°C           340 ~ 360°C       340 ~ 360°C
                         × 15 ~ 30 min         × 15 ~ 30 min     × 15 ~ 30 min
    Final sintering      320 ~ 340°C           320 ~ 350°C       320 ~ 360°C
                         ×1~3h                 ×1~3h             ×1~3h
    Applicable grade     NC-1500               NC-1539           NC-1519
                         AC-5600                                 AC-5539
    Clear type           : 50 ~ 100 µm/time
    Stabilizer contained : 100 ~ 300 µm/time

                               Electrostatic coating equipment

2) Processing step of NEOFLON Coating Powder (For Roto molding)

                  Metal mould

              Washing and grinding

                                         In case of lining, apply under-coating paint
           Applying mold release agent
                                         instead of release agent.

         Charging NEOFLON PFA Coating
                Powder, AC-5820

              Revolving metal mold

                    Sintering            AC-5820, 320 ~ 350°C × 30 ~ 120 min



4-2 Coating examples   1) Electrostatic coating
                              The higher the applied voltage the stronger the bonding force of powder
                              coating to the base material becomes, however electrostatic repulsion
                              occurs easily. It is, therefore, not advisable to increace the applied
                              A voltage of 20 to 50 kV is recommended for electrostatic coating of
                              NEOFLON Coating Powder.
                              The surface temperature of the base material greatly affects the coating.
                              If the surface temperature for FEP is lower than 200°C and for PFA is
                              lower than 250°C, the volume resistivity increases and an electric charge
                              is accumulated, with the result that the powder will not easily adhere, due
                              to electrostatic repulsion. This means that the coating cannot be
                              thickened. Note that electrostatic repulsion may cause pin holes and
                              The cooling speed of the preheated base material differs with the heat
                              volume of the base material (thickness of the base material if it is made
                              of the same material) and the surface area. And the processing time can
                              be obtained approximated by the following formula.
                                    c × γ × v × (t1 − t 2 )      t
                             τ=K                            × Ln 1
                                              F                 t2
                                τ = Processing time(minutes)
                                k = Proportional constant
                                t1 = Initial temperature of base material
                                c = Specific heat J/kg y deg
                                v = Volume of base material m3
                                t2 = Coating temperature limit
                                γ = Specific gravity kg/m3
                                F = Total surface area m2(including pipe internal surface)
                                For steel
                                 0.025 × 870 × v × (t1 − t 2 )      t
                             τ=                                × Ln 1
                                            F                      t2
                           Figure 2

2) Fluidized bed coating
   A preheated base material is immersed in the powder fluidized bed so
   the powder will melt and adhere to the base material, and then sintered
   The desired film thickness can be obtained by repeating this process.
   Thickness uniformity is obtained during the final sintering.
   The coating thickness is greatly affected by the heat volume of the base

                          Coating thickness and number of

                          Processing conditions
                          Article preheating:       30 min at 380°C
                          Immersion time:           1 min./dip
                          Intermediate sintering:   15 min. at 360°C
                          Final sintering:          120 min. at 350°C

3) Other coating methods
   Apipes internal surface can be coated by Roto lining method. For each
   processing method, the process from coating to sintering is performed in
   the general processing sequence.

4) Repair
   Defective parts of the coated film can be repaired by a hot-air generator
   for welding resins (capable of heating to higher than 350°C) to melt the
   film or weld it by using a welding rod of NEOFLON FEP or PEA. Wider
   defective parts can also be repaired by NEOFLON Film.Note, the
   strength of repaired parts is, in general, lowered.
   For a black welding rod is needed spray NEOFLON NC-1539 (FEP) or
   AC-5539 (PFA) coating powder on an aluminium plate to a thickness of 1
   ~ 2mm thick and sinter it for an hour at 350°C ~ 360°C to make a film
   which is to be cut into small pieces to make welding rods. If the film
   cannot be easily separated from the aluminium plate, dip it in hot water
   for 1 ~ 2 hours or leave it for 2 ~ 3 days, after which it can be easily
   peeled off. While welding, check to be sure that there is no water.

5. Coating test (Pin   Check coating for pin holes with a high direct current voltage (described in
                       JIS K6766). The test is performed with break-down voltage of resins
   hole test)          (19kV/100m) and with normal voltage from 5kV to 7kV.

6. Applications        Examples of the main uses of NEOFLON Coating Powder are listed
                       Applied fields     Application examples                  Utilized features
                       Chemical           Pumps, Valves, Tower tanks,           High corrosion resistance,
                       industries         Piping and its related parts,         High corrosion resistance,
                                          Sealing and its related parts,        High corrosion resistance and
                                                                                Heat resistance,
                                          Heat exchangers                       High corrosion resistance, High
                                                                                corrosion resistance, Antistick
                                                                                property, Heat resistance
                       Electrochemistry   Electric coating and its related      High corrosion resistance,
                                          parts (Jigs and tanks)                Anti-stick property,
                                          Metal plating and its related parts   Anti-stick property
                                          (Jigs and tanks)
                                          Electrolytic cells                    High corrosion resistance
                       Others             Metal molds                           Anti-stick property

7. Application
  7-1 Chemical industries

                                                        Photo-1                             Photo-2

                                       Photo-1:                                Photo-2:
                                       Without lining, after one month         NEOFLON FEP powder lining 1mm
                                       In case of this plant without lining,   Nothing abnormal is found after
                                       the material is SS-41 and wall          one year.
                                       thickness is 60mm, a large
                                       perforated pitting corrosion was

                                      • Running conditions
                                           HF 60%, H2SO4 30%, H2O 10%, and CaSO4 Slurries

         Photo-3                                       Photo-4                                  Photo-5

Photo-3:                               Photo-4:                                Photo-5:
Pump shaft before use                  The same pump shaft after three         The same shaft with NEOFLON
Material SUS-306.....without lining    month use                               FEP powder lining after one year
                                       .....Corrosion and wear can be          use
                                       observed.                               .....No change is observed.


     • Running conditions
           HF 60%, H2SO4 30%, 10% and CaSO4 Slurries
     • Parts of diaphragm pumps
       (NEOFLON FEP powder lining)
          Corrosion resistance (Products related food)
       Running conditions:
       Liquid chemical:
          Citric acid 85%

     Comparison with SUS 316
     NEOFLON FEP coating powder lining SUS316
     No change after 2 years operation    Holes opened due to corrosion and erosion after
                                          3 months
     Note: *NEOFLON FEP lining films conform to Ministry of Health and Welfare Notice 434.
            (in Japan)

• Screw feeder and its accessories
    Corrosion resistance and anti-stick property
  Running conditions:
    NaH2PO4, CH3COOH, H2O Slurries
    20 ~ 30°C

          Photo-7                                  Photo-8

• Heat exchanger
  (Plate heater) (NEOFLON FEP powder lining)
     Corrosion resistance, anti-stick property
     Used not only for corrosion resistance but also for easy removal of
  Running conditions:
  Liquid chemical:
     Strong alkali
     (Steam heating, suction temperature 130°C)
  Comparison example:
     NEOFLON FEP powder lining
       Nothing abnormal is observed after three year use.
     NEOFLON PCTFE paint lining
       Small cracks took place in many places after three month use


7-2 Electrochemistry   • Racks for plating
                                Corrosion resistance;
                                Antiweatherability was observed against any types of metal plating
                                Consequently, there is no need to change racks depending on treating
                                Compared with PVC, chemical liquid to be brought out is negligible
                                because of its excellent water repellency.
                            Using examples:
                                                      Photo-10               Photo-11
                            Kinds of metal plating    Zn plating             Ag plating
                            Chemical liquid             NaCN                  AgCN
                                                                                      →NaOH → HNO3
                                                        NaOH → NaOH → HNO3    KCN
                            Treating temperature (°C) 30 80 ~ 90             30 80 ~ 90

                                     Photo-10                                  Photo-11

                            • Electroless plating
                                Prevention of anchoring and corrosion
                                resistance of the nickel
                                precipitate on the wall face.
                              Running condition:
                              Bath temperature:
                                80°C ~ 90°C

7-3 Others

             Processing method for rollers
             Processing method            NEOFLON powder lining           NEOFLON thermal
                                                                          contraction tubes
             Accuracy *1                  2/100 mm                        10/100 mm
             Anti-crack property *2       Excellent                       Good
             Skiding between roll and     None                            Exist
             lining film in high temp.
             Corrosion resistance
                   Roller surface *3      Excellent                         Excellent
                   Roller side            Excellent                         Faulty
             Adhesion *2                  Excellent                         None
             Processability               Improcessable on the site         Processable on the site
             *1: Powder lining products can be finished by griding.
             *2: In order to promote adhesion of powder lining to the roller, provide primer coat.
             *3: Powder lining can cover the sides and the shaft, but thermal contraction tube cannot.

8. Cautions on      •Fluoroplastics
                    Although Fluoroplastics present no hazard under normal processing
   handling         conditions, these safe handling points should be followed:

                      The work area should be adequately ventilated at all times because HF,
                      COF2 begin to be produced above the respective approximate
                      temperature: (PTFE·PFA=260°C, FEP=205°C). The volume of vapors
                      increases above the respective approximate temperature:
                      (PTFE·PFA=380°C, FEP=360°C). If a fluoroplastic is incinerated, the
                      acidic gases must be removed by alkaline scrubbing techniques.
                    • Personnel should be cautioned against inhaling the fumes liberated during
                      processing and provided with suitable protective equipment.
                    • Do not smoke in the work areas as harmful vapors and gases can be
                      produced if a Fluoroplastic becomes transferred onto tobacco.
                    • Avoid breathing dust and contact with eyes.
                    • Wash hands and face after handling.
                    • Waste generated during processing should be treated by waste treatment
                      specialists and disposed of in accordance with federal, state and local
                      waste disposal regulations.

9. Packaging unit       NC Series     10kg
                        AC Series     10kg

                   14001(*1) certification which is an International Standard concerning the
                   environmental management system. DAIKINconcerning the environmental
                   management system. DAIKIN INDUSTRIES,LTD has obtained the ISO 9001(*2)
                   and DAIKIN AMERICA.INC has obtained the ISO 9002 (*3) .

                   *1. ISO 14001 is a standard established by the ISO (International Organization for
                   Standardization) which applies to environmental preservation activities. Activities,
                   products and services of our fluorochemicals plant have been certified as being
                   environmentally sound by an internationally recognized certification body.

                   *2. ISO 9001-2000 is a certification system for quality control established by the ISO
                   which certifies our quality control system concerning our products .

                   *3. ISO 9002-1994 is a plant certification system for quality control established by
                   the ISO which certifies our quality control system concerning manufacture and
                   inspection of the products manufactured at our plant (division).

                   IMPORTANT NOTICE: The information contained herein is based on technical
                   data and tests we believe to be reliable and is intended for use by persons having
                   technical knowledge and skill, solely at their own discretion and risk. Since
                   conditions of use are outside of our control, we assume no responsibility for results
                   obtained or damages incurred through application of the data given; and the
                   publication of the information herein shall not be understood as permission or
                   recommendation for the use of our fluorocarbon compounds in violation of any
                   patent or otherwise. We only warrant that the product conforms to description and
                   specification, and our only obligation shall be to replace goods shown to be
                   defective or refund the original purchase price thereof.

                   MEDICAL USE: This product is not specifically designed or manufactured for
                   use in implantable medical and/or dental devices. We have not tested it for such
                   application and will only sell it for such use pursuant to contract containing specific
                   terms and conditions required by us.

Umeda Center Bldg.,                   20 Olympic Drive                    Immermannstr. 65D
2-4-12, Nakazaki-Nisi, Kitaku,        Orangeburg, NY 10962, USA,          40210 Dusseldorf, Germany
Osaka 530-8323, Japan.                Phone:     +1-845-365-9500          Phone:     +49-211-179225-0
Phone:     +81-6-6374-9312            Tool-Free: +1-800-365-9570          Facsimile: +49-211-1640732
Facsimile: +81-6-6373-4389            Facsimile: +1-845-365-9598
                                                                                                             Jan. 2003 EG-63h AK
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