VITOLEN 111 UVR (UV-resistant) is the material of choice when the product is exposed to high levels of UV radiation. Among other things, it was developed as a UV-stable heat protection tape for foil greenhouses / tunnels, where it protects the foil against thermal and mechanical damage. For this purpose, metal frame work as well as its sharp-edged areas are covered by the one-sided self-adhesive VITOLEN 111 UVR before applying the greenhouse / tunnel foil.
Due to the acrylic adhesive treated with a UV stabilizer, the UV radiation does not damage the foam of VITOLEN 111 UVR, so that it does not disintegrate despite intense sunlight.
Extensive tests have shown that the laminated film of the tape is also protected by this adhesive.
The high-end acrylic adhesive is in itself resistant to UV, aging, weathering and temperature, in contrast to the commonly used inexpensive caoutchouc-based adhesives.
Excerpt of the weathering test
Parameters: 8 hours of UVA radiation and 4 hours of condensation alternately.
The literature (1) provides the rough correlation for UVA-340 lamps: 1.000 hours (42 days) corresponds to about one year of outdoor use.
PE foam, white, 3 mm, 33 kg/m³
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PE-foam, unprotected |
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PE-foam with 45 µm PP-film, laminated onto the foam with rubber-based hot-melt adhesive. after 63 days of weathering |
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VITOLEN 111 UVR |
Summary
Unprotected PE foams are severely damaged within approx. 3 years of outdoor weathering and then show recognizable cracks and furrows.
Products that are laminated with low-cost hot-melt rubber adhesives, as used up to now, show this behavior after a much shorter time.
By adding a suitable UV stabilizer in a high-end acrylate pressure-sensitive adhesive, no change in the surface can be observed even after more than 3,000 hours of accelerated aging.
List of references
The most important processing parameters and information on cleaning are listed in our Information on Processing Adhesive Tapes. Processing
The product must be stored unprocessed in the original carton at room temperature (20 ± 3 °C) and a relative humidity of 40 - 60 %. The shelf life is 12 months after receipt by the customer.
