Chemical Properties

1. Chemical Resistance

Lumirror™ is highly resistant to acids, taking little damage from weak acids at boiling points and strong acids near room temperature.
It features normal alkali resistance, withstanding weak alkalis but degrading when exposed to strong alkalis. However, care must be taken as ammonolysis caused by ammonia can lead to degradation.
Additionally, it is generally quite resistant to organic solvents and oils, with nonpolar substances in particular having almost no effect on Lumirror™.
Tables 1 and 2 show Lumirror™'s strength retention rate with various chemicals. To test this, Lumirror™ samples were immersed in various chemicals at room temperature for 5, 10, and 20 days, or at 100°C for 1, 3, and 5 hours (or the boiling point for liquids with a boiling point of 100°C or less). After, the changes in tensile strength were measured for each chemical, and compared to the strength the untreated material, which is shown as 100%. The thickness of each sample used for measurement was #25 (25 μ).
Table 3 shows the organic solvents and oils that have a particular effect on Lumirror™.
Note that the withstand voltage of Lumirror™ immersed in benzene, alcohol, freon, carbon tetrachloride, etc., is the same as that before being immersed.

Table 1. Lumirror™ Chemical Resistance (30°C, 5/10/20 Days)Unit: %
Chemical Time Immersed Overall Evaluation
5 Days 10 Days 20 Days
Glacial acetic acid919091Excellent
35% (concentrated) hydrochloric acid978584Good
18% hydrochloric acid1009492Excellent
60% (concentrated) nitric acid000NG
35% nitric acid1009287Good
80% sulfuric acid000NG
70% sulfuric acid10010092Excellent
60% sulfuric acid1009199Excellent
20% sulfuric acid929290Excellent
10% caustic potash978260NG
10% caustic soda74470NG
10% sodium carbonate10099100Excellent
28% (concentrated) ammonia water000NG
12% ammonia water94570NG
Ethyl acetate999091Excellent
Carbon tetrachloride10091100Excellent
Ethane tetrachloride9191100Excellent
Freon (45°C)10093100Excellent
Table 2. Lumirror™ Chemical Resistance (100°C, 1/3/5 Hours)Unit: %
Chemical Time Immersed Overall Evaluation
1 hr. 3 hr. 5 hr.
Glacial acetic acid989497Excellent
20% hydrochloric acid10010096Excellent
10% hydrochloric acid100100100Excellent
30% nitric acid8800NG
20% nitric acid10010098Excellent
10% nitric acid10010096Excellent
70% sulfuric acid83420NG
60% sulfuric acid100100100Excellent
40% sulfuric acid100100100Excellent
20% sulfuric acid100100100Excellent
10% caustic potash6200NG
10% caustic soda6100NG
10% sodium carbonate939588Good
12% ammonia water948297Excellent
Ethyl acetate959289Good
Ethane tetrachloride848584Good
Table 3. Organic Solvents and Oils With a Particular Effect on Lumirror™
Effect Chemical
Dissolution Effect Heated metacresol
Swelling Effect Benzoic acid
Salicylic acid
Methyl benzoate
Methyl salicylate

2. Component Extraction Ratio Based on Organic Solvent

Table 4 shows the ratio of components extracted from Lumirror™ when Lumirror™ is extracted with xylene or chloroform.

Table 4. Lumirror™ Component Extraction Ratio Based on Organic Solvent
Chemical Component Extraction Ratio (%) Thickness of Sample Used for Measurement Measurement Method
Xylene 1.2 #25(25μ) After drying at 110°C for 18 hours, extracted for 24 hours with xylene B.P. (140°C)
Chloroform 0.6 #100(100μ) After drying at 120°C for 2 hours, extracted for 12 hours with chloroform B.P. (61°C)
0.4 #188(188μ)

3. Conductivity and Acidity of Extract with Water

Table 5 shows the conductivity and acidity of the extract when Lumirror™ is extracted with water. The thickness of each sample measured was #75 (75 μ) and the measurement method was ASTM D 202-68.

Table 5. Lumirror™ Extract Conductivity and Acidity with Water
Property Characteristic Value
Conductivity 4μʊ/cm
Acidity 0.001

Lumirror™ Technical Information