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RFID System
User's Manual
Se
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Chemical Resistance
Applicable Models
PFA resin is used for exterior case material. Refer to the following lists and do not use chemicals that
affect PFA resin.
RF Tags cannot be used in applications with explosion-proof specifications.
Chemical Resistance of Fluoroplastic PFA (Reference)
PFA: Tetrafluorethylene-Perfluoroalkylvinyletheir Copolymer
Fluoroplastic PFA does not react with most chemicals except molten alkali metal, hot pressurized
fluorine (F
2
), and some halogen derivatives. The following tables show the results of tests in which PFA
was soaked in or exposed to commonly used organic and inorganic chemicals. In these tests, a
compression-molded test piece (1.3 mm thick) was soaked in the chemical at a specified temperature
for a week (168 houre) and taken out of the chemical, then the weight change, tensile strength, and
elongation of the test piece were immediately measured. If the change in the tensile strength is 15 % or
less, the cange in the elongation is 10 % or less, and the increase in the weight is less than 0.5 %, the
results of the test can be considered normal.
If PFA is exposed to trichloroacetic acid, tri-n-butyl phosphate, perchloroethylene, carbon thtrachloride,
and other liquids (which easily make resin surfaces wet) at a high temperature, it tends to increase its
weight due to absorption and reduce its tensile strength. Even when PFA absorbs chemicals and sol-
vents, its molecular structure will not change, If, however, PFA is subject to temperature or pressure
changes or mechanical damage when it has absorbed chemicals, the chemicals will repeatedly
expand and contract inside pfa, causing mechanical problems such as cracks and bulging. In fact, this
problem occurs with any kind of plastic.
Inorganic Chemicals
V680-D1KP66T-SP
Chemical name
Test
temperature
(
°
C)
Resulting characteristics
(%)
Weight
increase
rate (%)
Tensile
strength
Elongation
concentrated hydrochloric acid
120
98
100
0.0
Concentrated sulfuric acid
120
95
98
0.0
Hydrofluoric acid (60%)
23
99
99
0.0
Fuming sulfuric acid
23
95
96
0.0
Aqua regia
120
99
100
0.0
Chromic acid (50%)
120
93
97
0.0
Consentrated nitric acid
120
95
98
0.0
Fuming nitric acid
23
99
99
0.0
Concentrated ammonia solution
66
98
100
0.0
Caustic soda (50%)
120
93
99
0.4
Hydrogen peroxide solution (30%) 23
93
95
0.0
Bromine
23
99
100
0.5
Chlorine
120
92
100
0.5
Ferrous chloride (25%)
100
93
98
0.0
Zinc chloride (25%)
100
96
100
2.7
Chlorosulfonic acid
151
91
100
2.7
Concentrated phosphoric acid
100
93
100
0.0