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.

Composition of the heat shrinkable sleeve extrusion line:

1. PE back film extrusion Line
--- Single screw extruder
--- Die head
--- Three Calender
--- Roll temperature controlling system
--- Cooling rack
--- Hauling off
--- Rewinding machine

2. Adhesive Mixing and Coating Line
--- Unpowered uncoil device
--- Reactor
--- Adhesive coating system
--- Cooling water tank
--- Haul off
--- Coiler platform.

3. For three layer fiber reinforced heat shrink sleeve, we need to add below equipments
--- Fiber uncoiling device
--- Fiber heating device
--- Fiber flattening device

Applications of heat shrinkable sleeves:

-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
Adhesive	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
Heat Shrinkable Sleeve	water-intake rate	ASTM D570	%	0.05