| 摘要 |
A filter tape comprising a dustproof but ventilating textile fabric ( 1 ) which is provided with an anti-fungal and anti-algal agent to keep the pores ( 2 ) therein open. The anti-fungal and anti-algal agent comprises a first substance ( 5 ) that is not water-soluble, or hardly so, but that is nevertheless capable of entering into an in situ reaction with forming of an active second substance, that is considerably more readily water soluble. At least this second substance is toxic to fungi and algae. By thus starting from a non-soluble source for the active second substance, a time-release action is obtained whereby the anti-fungal and anti-algal action will be less rapidly exhausted. The ventilation and filter action of the fabric can be adjusted as required by means of an adaptable pattern ( 6 ). Optionally self adhesive traces ( 3 ) on one of the two sides of the filter tape, optionally protected by a protective sheet ( 4 ), enable simple mounting.
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