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Radiation cross - linked heat shrinkable sleeves are mainly used for the anticorrosion coating of field girth welds, anticorrosive and thermal - insulated pipes, and waterproof joints of plastic water supply and drainage pipes.
The technological process of Huashida heat shrinkable sleeve extrusion line:
First, the PE back film extrusion line manufactures PE films tailored to client specifications.
Second, the films are transported to a certified irradiation facility for precise radiation crosslinking, ensuring optimal fire resistance and tensile strength.
Third, the irradiated films enter the heat-shrinkable sleeve adhesive coating line, where they undergo:Double stretching to achieve the desired shrinkage rate;
Adhesive lamination using a proprietary hot-melt formula, extruded via a specialized reactor and bonded to the substrate under controlled pressure.The final product exhibits exceptional peel strength and dimensional stability.
-Adopt advanced technology
-Guarantee steady operation
-High automation level, cutting down labor costs
-Superior anti-corrosion quality, in line with international standards
-Provide a full-fledged production solution covering design, installation, commissioning, and training
-Share you 389 sets of production experience from all the world
-Having 9 professional senior engineers
-Maintain a high-end plastic machinery equipment expert workstation in China
Feature
Fast shrinkage speed, good waterproof performance, good anti-corrosive performance, long service life, convenient transportation and fast construction.
installation
When heat is applied to the sleeve wrapped around a joint, the adhesive melts and becomes a liquid while the sleeve backing begins to shrink. The radial shrinking forces of the sleeve squeezes the fluid adhesive into all the pipe surface irregularities, while the sleeve conforms tightly to the joint profile. On cooling, the adhesive solidifies, creating a tough bond to the pipe and the coating.
| ITEM | Standard | UNIT | Data | |
| Adhesive | softening point | ASTM E 28 | °C | 70-80 |
| shear strength | DIN 30 672 | N/cm | ≥100 | |
| Basic | specific density | ASTM D792 | r/cm 3 | 0.935-0.96 |
| tensile strength | ASTM D638 | Mpa | 15-20 | |
| Elongation at break | ASTM D792 | % | 350 | |
| hardness | ASTM D2240 | ball | 48 | |
| Heat Shrinkable Sleeve | peel strength | ASTM D1000 | N/cm | >150 |
| water-intake rate | ASTM D570 | % | 0.05 |
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