Chemical Resistance
Torelina™ features exceptionally outstanding resistance to chemicals. Table C1 indicates the variation of tensile strength in Torelina™ and polyester film when they are immersed in different chemicals.
Torelina™'s tensile strength remains stable in virtually all chemicals excluding concentrated sulfuric acid and nitric acid. Torelina™ does not have very weak points of chemical resistance as found in polyimide and polyester films against strong base and aramid paper against acid.
Table C1 Tensile Strength Retention of Different Films When Immersed in Chemicals (Testing conditions: 30°C, 10 days)
| Chemicals | Concentration (%) | Torelina™ | Polyester Film | ||
|---|---|---|---|---|---|
| 25μm | 25μm | ||||
| Percent tensile strength retained (%) | Remarks * | Percent tensile strength retained (%) | Remarks * | ||
| Acid, sulfuric | Conc. | 11 | P | 0 | P |
| Acid, sulfuric | 30 | 96 | E | 92 | E |
| Acid, hydrochloric | Conc. | 100 | E | 85 | G |
| Acid, nitric | Conc. | 0 | P | 0 | P |
| Acid, nitric | 10 | 97 | E | 92 | E |
| Acid, glacial acetic | - | 100 | E | 90 | G |
| Sodium hydroxide | 10 | 94 | E | 47 | P |
| Ammonium hydroxide | Conc. | 100 | E | 0 | P |
| Sodium carbonate | 2 | 98 | E | - | - |
| Iron(II) chloride | 45 | 94 | E | - | - |
| Hydrogen peroxide | 30 | 80 | G | - | - |
| Methanol | - | 98 | E | - | - |
| Ethanol | - | 100 | E | - | - |
| Acetone | - | 99 | E | 94 | E |
| Carbon tetrachloride | - | 94 | E | 91 | E |
| Benzene | - | 100 | E | 90 | G |
| Toluene | - | 98 | E | - | - |
| Methyl-ethyl-ketone | - | 90 | G | - | - |
| n-hexane | - | 98 | E | - | - |
| Methylene chloride | - | 96 | E | - | - |
- E: Excellent / G: Good / P: Poor hours
Gasohol Resistance
In addition to gasoline and other fuel oils, Torelina™ also features a superb durability against gasohol, the gasoline-alcohol mixture which is now receiving attention as a substitute for gasoline.(see Table C2). In particular, Torelina™ exhibits high durability against amine-based chemicals, the weak points for polyester film.
| Gasohol | Torelina™ | Polyester Film Lumirror™ S10 | ||
|---|---|---|---|---|
| 100 | 100 | |||
| Tensile strength retained (%) | Tensile elongation retained (%) | Tensile strength retained (%) | Tensile elongation retained (%) | |
| FUEL-C Isooctane (50%) / toluene (50%) | 87 | 80 | 95 | 90 |
| FUEL-C (85%) / methanol (15%) | 80 | 78 | 85 | 78 |
| FUEL-C (80%) / ethanol (20%) | 82 | 75 | 75 | 85 |
| FUEL-C / lauryl peroxide (2.5%) | 81 | 70 | 70 | 85 |
| FUEL-C / triethanolamine (0.5%) / dioctylphthalate (0.2%) | 81 | 75 | 75 | 35 |
Testing conditions: 60°C, 500 hours
Freon Resistance
As shown in Table C3, Torelina™ has a high resistance to Freon, a substance used as a refrigerant in air conditioners, etc. and the amount of extract is very small.
- Testing conditions:
- (1) Torelina™: 250μm
- (2) Freon: R134a
- (3) Temperature: 170°C (vapor phase)
- (4) Pressure: 3.4 to 3.5MPa
- Test results
Torelina™ freon resistance
| Film | Properties | After 500 hr. |
|---|---|---|
| Torelina™ (250µm) | Strength retained (%) | 100 |
| Tensile elongation retained (%) | 80 | |
| PET film (250 µm) | Strength retained (%) | 60 |
| Tensile elongation retained (%) | 5 or lower | |
| PEN film (250 µm) | Strength retained (%) | 48 |
| Tensile elongation retained (%) | 2 |
Note: Percentage of tensile strength and elongation retained (%) = Value after aging/initial value X 100