The prefabricated polyolefin tape coating system
The prefabricated polyolefin tape coating system shall have at least thress layers consisting of the following:
1. A liquid adhesive primer layer
2.An inner-layer tape for corrosion protection
3.An outer-layer tape for mechanical protection
The primer shall be liquid adhesive,the inner-layer tape and outer-layer tape shall be laminated polyethylene (low-density) ,backed self adhesive,rubberized,bitumastic compund tape, and made of prefabricated tapes in rolls.
The Inner tape and outer tape is butyl rubber tape. It consist of two layers,butyl rubber adhesive layer and the special blend of stabilized polyethylene film backing layer.
Thickness shall be a minimum of 0.30 mm.
Characteristics of tape:
Width deviation:5% of width
Elongation:300%
Tensile strength:7N/mm2
Tear reistance:8 kg/ cm
Dielectric strength:40 KVolt/ mm
Insulation reistance"1 X 10 12 ohm/mm
Impace resistance 6 J
Adhesion to steel with primer:3.0 N/ mm