FIELD: polymer materials.
SUBSTANCE: invention relates to plastics processing, in particular to fabrication of thermally shrinkable electronically and chemically modified tape designed for use in composite coatings based on mastic materials for anticorrosive insulation of various-destination steel main pipelines and in repair of pipeline coating. Fabrication of tape comprises extrusion of polyethylene composition, calendaring, electronic-chemical modification involving irradiation by accelerated electron stream (effected to absorption of dose 5-10 Mrad) and longitudinal orientation by 3-10% at 60-85°C. Wrap tape is characterized by content of gel fraction 40-54%, degree of shrinkage 3-6%, rupture strength 14.9-15.7 MPa, and breaking elongation 335-380%.
EFFECT: improved performance characteristics of tape.
1 tbl, 11 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR PRODUCING OF DOUBLE-LAYER THERMALLY SHRINKABLE TAPE | 2005 |
|
RU2286368C1 |
| WRAPPER TAPE | 2010 |
|
RU2459841C2 |
| METHOD OF ANTICORROSIVE INSULATION OF WELD JOINTS | 2005 |
|
RU2297572C1 |
| METHOD FOR PRODUCTION OF THERMOSHRINKABLE MULTILAYER ADHESIVE BAND | 1996 |
|
RU2074875C1 |
| METHOD OF MANUFACTURING MULTILAYER POLYOLEFIN-BASED HEAT-SHRINKAGE ADHESION MATERIAL | 1997 |
|
RU2124439C1 |
| METHOD OF PRODUCING THE THERMOSHRINKAGING ADHESION MATERIAL | 1996 |
|
RU2088624C1 |
| METHOD OF APPLYING INSULATION ON METALLIC SURFACE | 2005 |
|
RU2289061C1 |
| METHOD OF APPLYING ISOLATION COATING ON METALLIC SURFACE | 2005 |
|
RU2277199C1 |
| THERMOCONTRACTING CLUTCH FOR HYDRAULIC AND MECHANICAL PROTECTION OF JOINTS OF PIPELINES JOINTS | 2007 |
|
RU2382930C2 |
| METHOD FOR DOSIMETRY OF IONIZING RADIATION | 0 |
|
SU1661702A1 |
