SICHUAN FOREVER RADIATION TECHNOLOGY CO.,LTD
Heat Shrinkable Sleeves For Pipeline Joint Coating
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Heat-shrinkable materials are composed of an external backing made of extruded and cross-linked polyolefin, and an internal adhesive made of thermoplastic materials. The backing shrinks upon heating, which creates a level of circumferential compression in the coating. This compression supplements the bonding of the sleeve to the surface of pipe joints.
Heat-shrinkable sleeves are a type of field-joint coating system that is known to be one of the toughest coating systems available. This coating system consists of solvent-free, high-performance epoxy, an adhesive base copolymer, and modified cross-linked polyethylene. The design of this coating system is meant to replicate the structure of and meet the performance standards of mil-applied three-layer PE coatings. These coatings are compatible with all commonly used pipe coatings, including polyethylene, coal tar enamel, and fusion-bonded epoxy.
| Product properties | ||
| Property | Test Method | Typical Value HT 60 |
| Radiation crosslinking PE Backing | ||
| Tensile strength | ASTM D 638 | 3200psi (22MPa) |
| Elongation | ASTM D 638 | 550% |
| Thermal ageing 1) 150°C 21d elongation 2) Tmax +20°C 100d E100/E70 | ASTM D 638 EN 12068 | 420% 1.08 |
| Hardness, Shore D | ASTM D 2240 | 52 |
| Shrink force | ASTM D 638, 150°C (302°F) | 43psi |
| Dielectric strength at 23°C | ASTMD 149 | 825volts/(33KV/mm) |
| Moisture absorption | ASTM D 570 | 0.05% |
| Hot Melt Adhesive | ||
| Softening point | ASTM E 28 | 105°C (221°F) |
| Lap shear
| ASTM D 1002 EN 12068, @ 10 mm (0.40")/min. | 196psi (1.35N/mm2) @23°C (73°F) 37 psi (0.25N/mm2) @65°C (149°F) |
| Installed Sleeve | ||
| Peel to primer @23°C @Tmax | ASTM D 1000
| 130N/cm 25N/cm
|
| Cathodic disbandment | ASTM G 42, 30 days EN12068 Class C @23°C @80° | 8mm @ 65°C (149°F) 6mm 8mm |
| Hot water immersion | ASTM D 870, 120 days @Tmax | no delamination no blisters or water ingress |
| Resistance to thermal ageing (100d/100°C) Peel strength layer to layer P100/PT Peel strength to pipe surface P100/PT | EN 12068, Class C 80 |
3.6 3.8 |
| Low temperature flexibility | ASTM D 2671-C | -25°C (-13°F) |
| Impact resistance | ASTM G 14 EN 12068, class C | 66 in-lbs >15J no holiday |
| Penetration resistance | ASTM G 17, EN 12068, Class C | no holidays @10KV >0.6mm @ 65°C (149°F |
| Holiday detection at 5 kV/ mm + 5 kV | EN 12068 ,Class C | no holiday |
| Epoxy Primer | ||
| Specific Gravity @ 23℃-A -B | ASTM D1963 | ≥ 1.5 ＜1.0 |
| Shelf life | - | 2 Years |
| Color(Mixed) | - | Black |
This adhesive is excellent as it has many functions such as allowing for lower installation temperature during the pre-heat stage of bonding, and bonding to a variety of surfaces such as 3LPE, DFBE, FBE and CTE.
It is also highly resistant to shear forces caused by soil and thermal movements providing assurance for optimal bond retention.
What's more, this adhesive offers superior cathodic disbondment, hot water immersion resistance and Thermal ageing resistance giving the ultimate, long-lasting protection against corrosion.
In addition to its exceptional resistance properties, this adhesive can significantly reduce time and costs through its ability to bond at lower pre-heat temperatures and the use of a wet epoxy primer application.
For additional detail, please refer to the instructions for use.
To begin, mix the two components of the epoxy primer thoroughly before application. It is important that the mixture is well combined to ensure proper adhesion. Apply the primer to a minimum thickness of 150 µm, covering at least 10mm of the adjacent coating.
Remember not to mix more primer than can be applied during the pot life. Always follow the recommended guidelines for application to avoid waste or improper coverage.
Once the epoxy is applied and still wet, it's time to apply the sleeve. Before application, ensure that the adhesive is heated. Once applied, the closure patch must be heated and applied to secure the sleeve in place. The entire sleeve should be heat-shrunk to fit tightly around the joint.
After application, post heating is used to soften the sleeve. This process allows for the removal of any trapped air for optimal performance and longevity.
Polyethylene heat shrinkable tape is a highly versatile product that can be customized to fit your needs. We offer a range of customization services for our Polyethylene heat shrinkable tape including different models, sizes, and packaging options. Our products are made from high-quality materials and meet international standards such as ASTMD 638,ASTM D 2240,ASTM D 149,ASTM D 570,ASTM D 1000,ASTM D 870,ASTM D 2671,ASTM E 28,ASTM G 14,EN 12068,ISO 21809-3. Our Polyethylene heat shrinkable tape is available in three models: HT60, HT80, HT120, and comes in black color. With a minimum order quantity of 100 sets, we offer flexible payment terms and a supply ability of 1000 sets per day. Our packaging details vary according to pipe diameter, ensuring safe and secure delivery within 7-14 days. Contact us today for customized Polyethylene heat shrinkable tape that meets your specific requirements.
Sichuan forever have Mastic Heat shrinkable tape, Visco-elastic mastic heat shrinkable tape, Hot melt adhesive Heat shrinkable tape according to ISO 21809-3 standard, 13, 14 types and different shrinkage ratio, such as 30 %, 45% and 60%
