Polyphenylene Sulfide(PPS) Film Torelina*

Long-Term Thermal Resistance

Fig. P1 is an Arrhenius plot showing the relationship between the temperature and the time taken to reduce Torelina*'s tensile strength, elongation at break, and dielectric strength by half of their initial values, when forced aging is applied at various temperatures. Fig. P1 estimates Torelina*'s durability when it is used over extended periods of time at high temperatures

Fig. P1 Half-Reduction Time for Various Properties vs. Temperature

Table 1 Long-Term Thermal Resistance of Torelina


  Standards Minimum Thickness (m) Upper limit of usable temperature ()
Elongation Strength Electrical properties
U.S. UL746B 9 (160) 160 200
Japan Material registration according to the Electrical Appliance and Material Control Law 25 155 170 180

Short-Term Thermal Resistance

For short periods of time, such as several seconds to hours, Torelina* can withstand even higher temperatures than the aforementioned long-term thermal resistance. Table P2 shows the variation of mechanical properties after Torelina* has been heated for one hour at 230°C and 260°C. Virtually no deterioration is found in mechanical properties of Torelina* under these testing conditions.
Table 2 Short-Term Thermal Resistance of Torelina* at High Temperatures


Film Thickness(µm) Property Heating conditions
No heat treatment 230°C X1 hr. 260°C X1 hr.
12 Breaking Strength (MPa) 250 220 200
Elongation at Break(%) 67 71 87
Dielectric Strength (kV/mm,AC) 213 213 228
25 Breaking Strength (MPa) 250 220 170
Elongation at Break (%) 73 68 72
Dielectric Strength (kV/mm,AC) 247 239 264
75 Breaking Strength (MPa) 250 220 210
Elongation at Break (%) 72 63 79
Dielectric Strength (kV/mm,AC) 165 166 163

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