Wool - a natural product
- The ability of the wool fibre for water absorption at a temperature of 21°C is 15 to 17%.
- The swelling index of the wool fibre is approx. 40 - 45%.
- The wool fibre can stand temperatures up to approx. 150°C save at dry surrounding area.
- The structure of the wool fibre is damaged at 250°C.
- From 590°C on wool can inflame itself.
- The stability of the fibre in hot water depends on the pH-value.
- The highest fibre stability is reached at a pH-value of 4,9.
- The wool fibre is relatively acid-resistant.
- The wool fibre hydrolyses when cooking with bases to amino acids, fatty acids, ammonia and hydrogen sulfide.
Chemical characteristics
Wool as a protein fibre can bond the air pollutant formaldehyde chemically and can be resolved into its parts which are not
dangerous for human beings (f. e. water).
A human being spends 90% of his time in closed rooms! It is estimated that the critical value for formaldehyde is exceeded in 10% of the rooms. Independent from the formaldehyde concentration in the room as well as the air humidity wool bonds the formaldehyde chemically and thus cleans the room air.
(Source: Project study no. 13150 N1 of DWI e.V. Aachen)
