Summary |
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The sliding pad has many uses, including moving part of bridge , piping
and construction additions.
It makes moving part by conditons(temperature ,vibration,
earthquake) sliding smoothly.
Feature: This product is superior for low-friction applications. It
is self-lubricating, and has superior
heat- resistance and weather-resistance. It can
be also used reliably without maintenance or repair
for a long time.
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Applications |
|
 Application
examples of the sliding pad
General construction :
large piping, boiler, tank, heat exchanger, dust collector
Bridge : highway bridge,
rail bridge, MSS for manufacturing bridge
Ship : ship load out,
ship piping
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physical properties of steel plate |
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Types
of Steel plate
STAINLESS STEEL, CARBON STEEL, COPPER ALLOY etc.
chemical compositon & physical properties
CARBON STEEL PLATE
ITEM
|
CHEMICAL COMPOSITION |
MECHANICIAL PROPERTIES |
Material |
P %
|
S %
|
Tensile Strength
§¸f/§±
|
Strength at Yield
§¸f/§± |
0.05
|
0.05
|
41~52 |
221 |
|
Production method |
|
Etching
treatment
The etching shall be performed with the surface
treatment for bonding to the p.t.f.e. (POLY TETRA FLUORO
ETHYLENE) pad which is highly non-adhesive. After that time, keep
the etched teflon pad away from direct light.
Epoxy
adhesive
The both sides are bonded, painted equally, and
pressed with specialized equipment
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Design technology |
|
1. Design of unit load for a sliding pad
measurement of unit load for a sliding pad against overall load for a structure
2. Selecting sliding pad quantity
and location
selection of sliding pad location and quantity, which does not effect structure function and rigidity
3. Design of sliding pad operating
conditions
proper selection a sliding pad for use in a structure
4. Design of additional functional
requirements for a sliding pad
selection of sliding pads, according to requirements for: electric insulation, vibration reduction, high-temperature resistance, etc.
5. Selecting the proper installation
method for a sliding pad
Selecting the proper method of welding, voltage connection etc.
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Adhesive capability |
|
|
Adhesive capability according
to PTFE materials and adhesives |
Unit : kg/§² |
ADHESIVE |
IS-003 |
IS-004 |
IS-009 |
| PTFE |
PURE PTFE |
20 |
41 |
60 |
PTFE + CARBON |
23 |
40 |
63 |
PTFE + BRONZE |
29 |
43 |
67 |
PTFE + GRAPHITE |
25 |
38 |
58 |
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Type |
|
Plate
type : The PTFE PAD is bonded to a flat metal plate
Insertion
type : The PTFE PAD is inserted into a flat metal
plate
|
Application method |
|
The
p.t.f.e. pad is applied to a sliding rod via spot-welding, tack-welding,
full-welding and a voltage connection.
Caution
cover with a tape in order to prevent damage via bonding between
the ptfe and the steel plate by welding. The maximum
temperature 200¡É .
|
Coefficient of friction |
|
The coefficient
of friction shows different values according to pressure, include
sliding velocity and temperature. It is also different
according to testing method used and surface roughness.
The coefficient
of friction according to pressure is measured at a sliding velocity
of 100mm/s (The following is value when the APITONG
BOARD is slid on the ptfe pad)
coefficient of static friction : 0.1~0.25
coefficient of kinetic friction : 0.05~0.1
The coefficient
of friction is measured at 41.6kg/§² , as the sliding velocity increases
from 100mm/min to 400mm/min
result : The coefficient of friction is increased
with an increase in the speed of sliding
Coefficient
of friction diagram |
|
|
|
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Physical properties of ptfe pad
|
|
|
|
|
|
|
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ADHESIVE
|
Unit
|
measuring
standard
|
Virgin |
PTFE |
PTFE |
PTFE |
PTFE |
+CARBON 25% |
+BRONZE 60% |
+GLASS 25% |
Machancial Propreties |
§ç
|
JIS K 6891
|
46.1
|
16.7
|
18.1
|
18.6
|
Tensile strength |
Elongation |
% |
JISK 6891 |
370 |
30 |
275 |
280 |
Compressive
strength
|
§ç
|
0.2% off set |
7.6
|
11.3
|
11.6
|
8.6
|
24¡É |
1% strain |
5.4
|
10
|
10.2
|
8.3
|
24¡É |
25% strain |
28
|
39.8
|
43.1
|
28.9
|
24¡É |
Total deformation
|
%
|
ASTM D621
|
15.2 |
6.4 |
6.6 |
14 |
14.5 |
5.5 |
6.1 |
8.5 |
Hardness
|
Duro |
Shore,
24¡É
|
52~62
|
65~75
|
62~72
|
56~60
|
meter D |
Coefficient
of friction
|
¡¡
|
Static |
0.22 |
0.29 |
0.24 |
0.26 |
Dynamic |
0.048 |
0.09 |
0.062 |
0.085 |
Wear factor |
¡¡
|
¡¡
|
2.0¡¿10-4 |
2.0¡¿10-4 |
0.7¡¿10-4 |
1.0¡¿10-4 |
Physical properties |
¡¡
|
¡¡
|
2.17
|
1.93
|
3.95
|
2.25
|
Specific gravity |
|
life span & coefficient of abrasion |
|
In case of a general-use sliding pad, the important variables are
pressure, velocity and wear.
abrasion
of variable
basic variable: load , velocity, time
composition of movement (ex: reciprocating, shaking,
revolution)
Environmental conditions that exist (ex: oil or
water on the surface of sliding pad)
relative material, surface roughness
R = K¤ýP¤ýV¤ýT ( wear equation for archard )
R : wear of diameter direction
K : coefficient of wear §¨¤ýmin/ kg¤ým¤ýh
P : load per unit area that the relative material
contact pad kg/§²
V : sliding speed m/min
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PTFE PAD |
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SLIDING PAD |
SKID PAD |
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Technical consultation |
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The coefficient of friction is low in case of movement
The ptfe pad is slid without stopping
The ptfe is safe from chemical conditions and heat.
Because it doesn't absorb moisture, it can be used
outside.
The ptfe used outdoors without oil has the same
sliding capability during all 4 seasons.
The ptfe pad of IL-SHIN P.T.F.E. CO is easy to
install. It can be installed via welding or voltage methods.
There is no concern for fatigue failure with the ptfe pad.
The ptfe pad is an insulator . The adhension doesn't
lower quickly due to external heat.
The ptfe pad dampens oscillation.
The painted ptfe pad with interfacial oil isn't
worn.
We can custom manufacture whatever size is required.
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