Product Information
EG-63h
Daikin Industries
Fluoroplastics
NEOFLON
Coating Powder
TM
Introduction
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
Powder
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
For electrostatic
coating
For Roto moulding
Film thickness per
application
(µm) Max.
Film thickness by multiapplications
(µm) Max.
Film thickness per
application
(µm)
FEP (NC)
PFA (AC)
300 ~ 500
300
Approx. 2,000
Approx. 1,000
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
properties
2
1) Excellent resistance to stress cracking
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
NEOFLON Coating Powder are available in the following grades depending
on processing method.
Table 2 NEOFLON FEP Coating Powder Grades
Product Appearance Feature
No.
Color
NC1500
White
powder
NC1519
Graynish
Wide
black
white powder processing
window.
NC1539
Graynish
Excellent
white powder corrosion
resistance
NC1810
White
powder
NCX-1 White
powder
High purity clear
product
black
Processing
methods
Processable Application
thickness
Spray coating. 100 ~
Electrostatic- 300 µm
coating
Topcoat for
corrosionresistant lining
Anti-stic coating
Spray coating. 100 ~
Undercoat for
Electrostatic- 2,000 µm corrosioncoating.
High build resistant lining
type
Spray coating. 100 ~
Electrostatic- 2,000 µm
coating.
High build
type
Under and top
coat for
corrosionresistant lining
High purity clear
product
Roto moulding 500 ~
Roto lining.
5000 µm
Container
Corrosionresistant lining
Thin build
type
Electrostaticcoating.
For slight
Corrosionresistant lining
clear
30 ~
80 µm
Table 3 NEOFLON PFA Coating Powder Grades
Product Appearance Feature
No.
ACXWhite
Thin build
31
powder
type
Color Processing
methods
clear Electrostaticcoating
Processable Application
thickness
30 ~
IH Rice cooker, OA
rool. For slight
80 µm
corrosion-resist
lining
ACWhite
Good
clear Spray
100 ~
Topcoat for
5600
powder *
leveling
coating
corrosion- resistant
300 µm
property
Electrostaticlining and anti-stick
coating
coating
ACGray powder High build black Spray
100 ~
Under, top coat for
5539
type
coating
1,000 µm corrosion- resistant
Electrostaticlining
coating
ACWhite
High purity clear Roto
500 ~
Container
5820
powder *
product
moulding
5,000 µm CorrosionRoto 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.
2
3. NEOFLON Coating
Powder Properties
3-1 Powder Properties
Table 4 Powder
Items
Measuring method Unit
NC
NC
AC
AC
(for spray) (for roto)
0.55 ± 0.10 0.90 ± 0.15 0.55 ± 0.10 0.90 ± 0.15
Apparent JIS K6891
g/ml
density
Particle (Laser diffraction) µm
55 ± 35
210 ± 60
size
Melting NC:ASTM D2116 °C
265 ∼ 275 255 ~ 275
point
AC:ASTM D3307
Melt
NC:ASTM D2116 g/10 min 0.8 ∼ 1.5
4~8
index
AC:ASTM D3307
(1) NC-1500, 1519, 1539 (2) AC-5600, 5539 (3) AC-5820
3-2 Coating Properties
45 ± 25
200 ± 50
303 ~ 313
303 ∼ 313
1~7
5~7
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
3-3 Chemical resistance
of coating
1) Adsorption of chemicals
Figure 1 and Table 6 show the results of chemical adsorption when
fluoropolymer coatings are immersed in chemicals for the condition
indicated.
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,
acetone
Figure 1 Chemical Adsorption Curves
Suitability
A or below:
Excellent
A ~ B:
Sufficient for use
B ~ C:
Applicable depending
on conditions
X, Y:
Not applicable
Table 6 Chemical Resistance Comparsion
NEOFLON
FEP
and PFA
NEOFLON
ETFE
NEOFLON
VDF
NEOFLON
CTFE
ECTFE
A or below
A~B
All chemicals
Chloroform
except
chloroform
Sulfuric acid,
hydrochloric acid,
sodium hydro
oxide
Hydrochloric acid
All chemicals
Toluene
except toluene
and chloroform
Sulfuric acid,
hydrochloric acid,
sodium hydro
oxide
B~C
X, Y
Ammonia
chloride, acetone,
toluene,
diethylamine
Chloroform
Nitric acid,
chloroform
Acetone,
toluene,
diethylamine
Nitric acid,
aqueos
ammonia,
chloroform
All chemicals
except the ones
described on the
left
Chloroform
4
2) NEOFLON Coating Chemical Resistance
The chemical resistant properties of NEOFLON Coating are listed below:
Table 7
Chemical
Sulfuric acid (98%)
Hydrochloric acid (36%)
Nitric acid (60%)
Hydrofluoric acid (40%)
Chlorosulfonic acid
Chromic acid (40%)
Perchloric acid
Formic acid
Citric acid (40%)
Glacial acetic acid
Trichloroacetic acid
Chlorine water
Soda hypochlorite
Potassium permanganate (20%)
Aluminum chloride (25%)
Ammonia chloride (25%)
Aqueous ammonia (28%)
Sodium hydro oxide (50%)
Benzene
Toluene
n-butylamine
Diethylamine
Morpholine
Chloroform
Trichloroethylene
Acetone
Methyl ethyl ketone
Ethyl acetate
Ethyl cellosolve
Ethyl carbitol
Ethylene dichloride
Ethylene oxide
Ethyl alcohol
n-hexane
After 50 days at 95°C
NC-1519
Excel
Good
Good
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Poor
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Good
Good
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
NC-1539
*1
AC-5539
Excel
Excel
Excel
Excel
Excel or Good
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Good
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Good
Good
Good
Good
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
Excel
(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 NC1539 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.
5
4. Processing of
NEOFLON Coating
Powder
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)
Base material
Machine corners to a radius of 5 to 10 mm and
eliminate pin holes from the welded part.
Degrease and baking
Remove oil and grease from the surface of a base
material.
Roughening surface
Roughening the surface of a base material by sand
blasting or grid shot.
Under-coating with under-coating paint
Drying
Sintering
Cooling
NEOFLON Coating Powder (repeat coating)
First layer: EK-1083GB (needed only for steel and
stainless steel materials)
Second layer: EK-1883GB
First layer: 80 ~ 90 °C × 10 min. or more
Second layer: 80 ~ 90 °C × 10 min. or more
First layer: 380 °C × 10 min.
Second layer: 380 °C × 30 min.
Under 40 °C
(Coating condition for EK-1883GB)
Electrostatic coating
Sintering
Cooling
Water cooled, air cooled, or furnace cooling is
possible.
Product
6
Table 8 Appropriate Sintering Conditions for Each Grade
Middle sintering
Final sintering
Applicable grade
340 ~ 350°C
× 15 ~ 30 min
320 ~ 340°C
×1~3h
NC-1500
AC-5600
340 ~ 360°C
× 15 ~ 30 min
320 ~ 350°C
×1~3h
NC-1539
Clear type
: 50 ~ 100 µm/time
Stabilizer contained : 100 ~ 300 µm/time
Electrostatic coating equipment
7
340 ~ 360°C
× 15 ~ 30 min
320 ~ 360°C
×1~3h
NC-1519
AC-5539
2) Processing step of NEOFLON Coating Powder (For Roto molding)
Metal mould
Washing and grinding
Applying mold release agent
In case of lining, apply under-coating paint
instead of release agent.
Charging NEOFLON PFA Coating
Powder, AC-5820
Revolving metal mold
Sintering
AC-5820, 320 ~ 350°C × 30 ~ 120 min
Cooling
Product
8
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
voltage.
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
foaming.
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.
Formula
c × γ × v × (t1 − t 2 )
t
× Ln 1
F
t2
Where;
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
τ=K
0.025 × 870 × v × (t1 − t 2 )
t
× Ln 1
F
t2
Figure 2
τ=
9
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
intermediately.
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
material.
Coating thickness and number of
immersions
Processing conditions
Article preheating:
Immersion time:
Intermediate sintering:
Final sintering:
30 min at 380°C
1 min./dip
15 min. at 360°C
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.
10
5. Coating test (Pin
hole test)
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
(19kV/100m) and with normal voltage from 5kV to 7kV.
6. Applications
Examples of the main uses of NEOFLON Coating Powder are listed
below.
Applied fields
Chemical
industries
Application examples
Pumps, Valves, Tower tanks,
Piping and its related parts,
Sealing and its related parts,
Heat exchangers
Electrochemistry
Others
11
Electric coating and its related
parts (Jigs and tanks)
Metal plating and its related parts
(Jigs and tanks)
Electrolytic cells
Metal molds
Utilized features
High corrosion resistance,
High corrosion resistance,
High corrosion resistance and
Heat resistance,
High corrosion resistance, High
corrosion resistance, Antistick
property, Heat resistance
High corrosion resistance,
Anti-stick property,
Anti-stick property
High corrosion resistance
Anti-stick property
7. Application
examples
7-1 Chemical industries
Photo-1
Photo-1:
Without lining, after one month
In case of this plant without lining,
the material is SS-41 and wall
thickness is 60mm, a large
perforated pitting corrosion was
observed.
Photo-2
Photo-2:
NEOFLON FEP powder lining 1mm
thick
Nothing abnormal is found after
one year.
• Running conditions
Chemicals:
HF 60%, H2SO4 30%, H2O 10%, and CaSO4 Slurries
Temperature:
150°C
Photo-3
Photo-3:
Pump shaft before use
Material SUS-306.....without lining
Photo-4
Photo-4:
The same pump shaft after three
month use
.....Corrosion and wear can be
observed.
Photo-5
Photo-5:
The same shaft with NEOFLON
FEP powder lining after one year
use
.....No change is observed.
12
Photo-6
• Running conditions
Chemicals:
HF 60%, H2SO4 30%, 10% and CaSO4 Slurries
Temperature:
100°C
• Parts of diaphragm pumps
(NEOFLON FEP powder lining)
Use:
Corrosion resistance (Products related food)
Running conditions:
Liquid chemical:
Citric acid 85%
Temperature:
95°C
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)
13
• Screw feeder and its accessories
Use:
Corrosion resistance and anti-stick property
Running conditions:
Chemicals:
NaH2PO4, CH3COOH, H2O Slurries
Temzperature:
20 ~ 30°C
Photo-7
Photo-8
• Heat exchanger
(Plate heater) (NEOFLON FEP powder lining)
Use:
Corrosion resistance, anti-stick property
Used not only for corrosion resistance but also for easy removal of
scale
Running conditions:
Liquid chemical:
Strong alkali
Temperature:
100°C
(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
Photo-9
14
7-2 Electrochemistry
• Racks for plating
Use:
Corrosion resistance;
Antiweatherability was observed against any types of metal plating
liquids.
Consequently, there is no need to change racks depending on treating
order.
Compared with PVC, chemical liquid to be brought out is negligible
because of its excellent water repellency.
Using examples:
Photo-10
Zn plating
NaCN
NaOH → NaOH → HNO3
ZnO
Treating temperature (°C) 30 80 ~ 90
Kinds of metal plating
Chemical liquid
Photo-10
Photo-11
Ag plating
AgCN
→NaOH → HNO3
KCN
30 80 ~ 90
Photo-11
• Electroless plating
Use:
Prevention of anchoring and corrosion
resistance of the nickel
precipitate on the wall face.
Running condition:
Bath temperature:
80°C ~ 90°C
Photo-12
15
7-3 Others
Processing method for rollers
Processing method
NEOFLON powder lining
NEOFLON thermal
contraction tubes
10/100 mm
Good
Exist
Accuracy *1
2/100 mm
Anti-crack property *2
Excellent
Skiding between roll and
None
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.
16
8. Cautions on
handling
•Fluoroplastics
Although Fluoroplastics present no hazard under normal processing
conditions, these safe handling points should be followed:
• WARNING: VAPORS HARMFUL IF INHALED.
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
17
NC Series
AC Series
10kg
10kg
z DAIKIN INDUSTRIES,LTD. and DAIKIN AMERICA.INC. have obtained the ISO
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.
DAIKIN INDUSTRIES, LTD.
DAIKIN AMERICA, INC.
DAIKIN CHEMICAL EUROPE GmbH
Umeda Center Bldg.,
2-4-12, Nakazaki-Nisi, Kitaku,
Osaka 530-8323, Japan.
Phone:
+81-6-6374-9312
Facsimile: +81-6-6373-4389
20 Olympic Drive
Orangeburg, NY 10962, USA,
Phone:
+1-845-365-9500
Tool-Free: +1-800-365-9570
Facsimile: +1-845-365-9598
URL:www.daikin.cc
Immermannstr. 65D
40210 Dusseldorf, Germany
Phone:
+49-211-179225-0
Facsimile: +49-211-1640732
Jan. 2003 EG-63h AK