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Technical : Properties : Safety
PVA resin, which is the raw material of PVA-fiber, is designated by the FDA (U. S. Food and Drug Administration) as a safe material. PVA's chemical structure is based solely on carbon, hydrogen and oxygen. When burned, harmful substances such as dioxin and ammonia are not created. (This structure is quite different from polyvinyl chloride.) As PVA fiber is composed of carbon , hydrogen and oxygen, only water and carbon dioxide is generated during burning.
Toxicity
| Fiber |
The number of living rats |
| 5min. |
10min. |
15min. |
20min. |
30min. |
24hrs. |
|
|
|
|
|
|
|
|
PVA-fiber
|
5 |
5 |
5 |
5 |
5 |
5 |
|
Polyacrylonitrile-fiber
|
0 |
- |
- |
- |
- |
- |
|
Polyamide-fiber
|
5 |
5 |
5 |
5 |
5 |
4 |
|
Metha-alamide-fiber
|
5 |
5 |
5 |
5 |
5 |
0 |
|
Wool
|
5 |
2 |
2 |
1 |
1 |
- |
|
|
Measurement by Kuraray Co., Ltd.
Test Method
1) 5 rats were used in each test.
2) Each 10g of fiber was heated at 400 degree C in the fireplace and rats were inserted into the smoking gas.
3) The number of living rats was checked at every fixed time.
(Conclusion) The data clearly demonstrate PVA' s superior safety in the event of fire.
| Gas |
CO |
CO2 |
NH3 |
HCN |
H2S |
|
|
|
|
|
|
|
|
|
|
|
| Fiber |
600 |
400 |
600 |
400 |
600 |
400 |
600 |
400 |
600 |
400 |
|
|
|
|
|
|
|
|
|
|
|
|
PVA-fiber
|
0.45 |
0.13 |
0.59 |
0.13 |
- |
- |
- |
- |
- |
- |
|
Polyacrylonitrile-fiber
|
1.33 |
0.16 |
0.15 |
0 |
0.06 |
0.05 |
0.09 |
0.02 |
- |
- |
|
Polyamide-fiber
|
0.88 |
0.10 |
0.40 |
0.01 |
0.05 |
traces |
0.03 |
0 |
- |
- |
|
Cotton
|
4.33 |
0.46 |
0.75 |
0.34 |
- |
- |
- |
- |
- |
- |
|
Wool
|
2.00 |
0.10 |
0.59 |
0.15 |
0.10 |
0.06 |
0.05 |
0.01 |
0.04 |
0.05 |
Reference: Magazine "Fiber" No.29 (3) 1977 Suwada
As PVA fiber is composed of Carbon,Hydrogen and Oxygen, only Water and Carbon dioxide is generated during burning. |
