Polypropylene Based Heat-Shrinkable Sleeve That Have High Electrical Resistance And Low Permeability
Heat-shrinkable multi-layer sleeves that have high electrical resistance and low permeability
PRODUCT LINE
A series of 2- and 3-layer heat-shrinkable sleeves for applications including pipeline field joint corrosion prevention, mechanical protection, and sealing of district heating and district cooling pipelines.
CORROSION PREVENTION
An irradiation cross-linked & stretched polyolefin backing with an adhesive laminated on in order to form the basic product.
The adhesive may be either visco-elastic based mastic or co-polymer hot melt adhesives to match up with in-service performance requirements.
polypropylene based heat-shrinkable sleeve and is designed forcorrosion prevention and sealing for polypropylene coated pipelines,operating at temperatures up to 120°C. PP is especially suitedfor higher stress conditions caused both by elevated temperatures andby soils with severe contraction between wet-dry cycles.
3LPP HSS is normally used for girth weld protection of steel pipescoated with polypropylene.
Construction: Three-layer system• First layer: Two component liquid epoxy.•
Second layer: High shear strength polypropylene adhesive layer.•
Third layer: Thick cross-linked polypropylene backing layer.
| Test standard | Unit | 3PP 110 | ||
| Adhesive | Softening point | ASTM E28 | ℃(℉) | 110 |
| Lap shear @23℃ | EN12068 | N/cm2 | 550 | |
| Lap shear @23℃ | EN12068 | N/cm2 | 25 | |
| Backing | Specific gravity | ASTM D792 | g/cm3 | 95 |
| Tensile strength | ASTM D638 | MPa (psl) | 24 | |
| Elongation | ASTM D638 | % | 550 | |
| Hardness | ASTM D2240 | Shore D | 55 | |
| Abrasion resistance | ASTM D 1044 | Mg | 35 | |
| Volume resistance | ASTM D257 | Ohm-cm | 1017 | |
| Dielectricvoltage breakdown | ASTM D149 | Kv/mm | 27 | |
| Sleeves | Impact | EN12068 | J | >8 |
| Indentation | EN12068 | mm | 0.1 | |
| Peel adhesion | ASTM D1000 | N/cm | 120 | |
| Peel adhesion | EN12068 | N/cm | >140 | |
| Cathodic disbondment | ASTM G8 | Mm rad | 3 | |
| Water absorption | ASTM D 570 | % | 0.05 | |
| Low Temp.flexbility | ASTM D2671-C | ℃(℉) | >-32(-26) | |
| Fully recovered T thickness | Mm(mil) | 1.9(77) | ||
| Fully recovered L thickness | Mm(mil) | 2.4(96) |
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