Automatic Hot Melt Adhesive Coating Machine for Heat Shrink Sleeve with Reactor

Developed by Qingdao Huashida Machinery with 21+ years of pipeline anti-corrosion equipment manufacturing experience, this TJ-700 hot melt coating line is a fully automatic adhesive coating machine for heat shrink sleeve and tape production.

Built for 1100-1200mm wide PE back film coating, this machine is the core stage of our cross-linked sleeve equipment. It combines a 300L reactor, PE backing stretching unit, adhesive coating roller and PLC control system to mass-produce high-performance pipeline anticorrosion sleeves for girth weld and field joint coating (FJC).

This adhesive coating machine supports customized mass production of radiation cross-linked PE protective materials for pipeline girth weld joints, in line with international anti-corrosion standards.

Sleeves made on this heat shrink tape coating line have stable shrinkage, strong bonding and excellent waterproof anti-corrosion performance:

• Oil and Gas Pipeline Girth Weld Protection: long-distance large-diameter transmission pipelines, 2PE/3LPE coated steel pipe girth welds and seamless steel pipe field joints.
• District Heating Pipeline Sealing: joint anti-corrosion and thermal sealing for PU foam pre-insulated pipelines.
• Municipal and Industrial Drainage Protection: spiral corrugated pipes, steel-reinforced plastic pipes and PVC-U sewage pipes.
• Pipeline On-Site Maintenance and Rehabilitation: gap sealing, damage repair and field joint renovation of buried pipelines.

This girth weld sleeve line uses a modular configuration of coating system, stretching unit, optional fiberglass upgrade device and PLC intelligent control for continuous production.

• TJ-700 Adhesive Coating Line: automatic online PE back film coating with hot melt adhesive, plus secondary stretching and shaping.
• RS-800 PE Backing Extrusion Line: stable 150-200kg/h output of high-purity LDPE/HDPE backing film.
• Fiberglass Reinforced Upgrade Configuration: fiber unwinding, constant-temperature heating and leveling equipment.
• Auxiliary and Intelligent Control System: circulating cooling system, precision haul-off unit, PLC electric control.

• Working Place: indoor non-hazardous production workshop
• Power Supply: 380V 50HZ (-10%, +5%)
• Working Humidity: ≤85%, no condensation
• Circulating Cooling Water: ~0.5m³/min (≤20ºC, 0.3Mpa)
• Compressed Air: ~0.4m³/min, working pressure >0.5Mpa

This hot melt coating line is the third step of a three-step molding process used worldwide for pipeline field joint coating materials:

• Step 1, Substrate Extrusion: high-purity PE is extruded into flat, uniform back film on the RS-800 line.
• Step 2, Electron Beam Radiation Crosslinking: professional irradiation gives the PE film a shape memory effect, high tensile strength and aging resistance.
• Step 3, Online Adhesive Lamination and Shaping: the cross-linked film is precisely stretched and compounded with imported hot melt adhesive from the 300L reactor.

• One Coating Machine, Two Products: the same adhesive coating machine makes standard two-layer and fiberglass reinforced three-layer sleeves
• Ultra-Wide 1100-1200mm Range: the widest in our sleeve line series, covering extra-large-diameter girth weld projects
• International Standard Performance: >150N/cm peel strength, ≥100N/cm shear strength and ≤0.05% water absorption
• Intelligent and Energy-Saving: PLC and ABB motor give automatic, continuous operation with lower labor and energy costs
• Premium Adhesive Compatibility: works with world-class brand hot melt adhesives for long-term bonding
• Proven Technology: independent R&D, a national expert workstation, 9 senior engineers and 389+ global project cases

All finished radiation cross-linked PE heat shrink sleeves comply with ASTM, DIN and GB/T standards:

• Tensile Strength: 15-20MPa (ASTM D638)
• Elongation at Break: ≥350%
• Peel Strength: >150N/cm (ASTM D1000)
• Shear Strength: ≥100N/cm (DIN 30672)
• Adhesive Softening Point: 70-80°C (ASTM E28)
• Water Absorption Rate: ≤0.05% (ASTM D570)

Qingdao Huashida Machinery is a professional manufacturer of pipeline anti-corrosion equipment and plastic extrusion machinery with 21+ years of R&D and production experience. Our heat shrink sleeve machine family covers three width configurations:

• Model 800 (650mm): anti-corrosion pipeline joints
• Model 1000 (750-800mm): pipeline field joint coating
• Model 1350 (1100-1200mm): girth weld protection and large-diameter field joint coating

All three models are exported to dozens of countries. We customize each hot melt coating line to the customer's required output, sleeve width and pipeline application.

Payment Terms: 30% deposit within 2 working days after contract signing, 67% before goods delivery, 3% within 10 days after installation and commissioning.

• Warranty: 12 months mechanical / 6 months electrical from equipment receipt date
• Free Services: technical documents, electrical drawings and on-site operator training
• Installation and Commissioning: professional engineers dispatched for on-site guidance
• Long-Term Support: lifetime technical consultation, spare parts supply and troubleshooting

• Delivery Time: 90 days after deposit confirmation
• Packaging: standard wrap film; wooden pallets or cartons available