TORAYPEF® Polyolefin Foam

Technical Information | Resistance to chemicals

Chemical properties

Ⅰ. Chemical resistance

TORAYPEF® exhibits superb chemical resistance because it is made from polyolefin and because it has a molecular structure that is cross-linked by means of an electron beam. Table 1 shows the results of chemical resistance tests. TORAYPEF® swells some when exposed to carbon tetrachloride, toluene, and heptane. Otherwise, TORAYPEF® is not attacked by most other chemicals. That said, TORAYPEF® does partially dissolve in heated aromatic hydrocarbons.

Table 1: Chemical resistance of TORAYPEF® (30060) (Immersion for one week at 23°C)
Chemical name Discoloration or cracks Dimensional change Absorptivity
 (mg/cm2)
Remarks
Water None <1  
Sulfuric acid 30% None <1 Decreased thickness
Sulfuric acid 3% None <1  
Nitric acid 10% None <1  
Hydrochloric acid 10% None <1  
Sodium hydroxide 10% None <1  
Sodium hydroxide 1% None <1  
Carbonate of soda 2% None <1  
Ammonia water 10% None <1  
Saline solution 10% None <1  
Oxygenated water 3% None <1  
Acetic acid 5% None <1  
Citric acid 10% None <1  
Oleic acid None <1 Decreased thickness
Carbolic acid 5% None <1  
Ethyl acetate None 3  
Ethyl alcohol 95% None <1  
Ethyl alcohol 50% None <1  
Acetone None 3  
Heptane None 9 Some swelling
Toluene None 16 Some swelling
Dichloroethane None 3  
Carbon tetrachloride None 23 Some swelling
Gasoline None 11 Some swelling
Automotive oil Slight yellowish <1  
Rapeseed oil None <1  
Silicone oil None <1  

Dimensional change: ◎ None; 〇 Some change (less than 5%) in thickness direction; △ Significant change (5% or more)

Ⅱ. Weatherability

Figure 1 shows the results for TORAYPEF® from outdoor exposure tests. TORAYPEF® holds up for about 8 months to 1 year. After that, the surface layer degrades conspicuously. The same tests were run simultaneously using other plastic foams. Soft urethane foam degraded completely after 1-3 months. Polystyrene foam saw its surface layer degrade conspicuously after 3 months; after 8 months, its thickness had reduced to half. Soft PVC foam underwent substantial shrinkage. Accelerated weatherability testing performed on TORAYPEF® using a weather tester found that after 1,500 to 2,000 hours the surface layer became brittle and cracked, showing conspicuous degradation; but that was the extent of the effects. However, the PP grade has slightly lower resistance to weather and is not suited for standalone use outdoors. Covering with a PVC sheet or some other weather-resistant skin resolves that issue.

Figure 1: Change in TORAYPEF® (30060) resulting from outdoor exposure

These data are representative examples of measurement values obtained using specific conditions. The values should not be used as a standard.

Figure 1: Change in TORAYPEF® (30060) resulting from outdoor exposure

Ⅲ. Toxicity

TORAYPEF® is a hygienic material that complies with hygiene tests performed in accordance with Notification No. 20 of Japan�fs Ministry of Health, Labour and Welfare. Please read the Material Safety Data Sheet (SDS) carefully before handling this product.

These data are representative examples of measurement values obtained using specific conditions. The values should not be used as a standard.