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Heat Shrink Sleeves

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Industrial Heat Shrink Sleeves | Direct Manufacturer Specifications & RFQ

 

Industrial heat shrink sleeves provide mechanical protection, electrical insulation, and environmental sealing for wire harnesses, splices, and terminals. Extruded from cross-linked polymer compounds, these tubes reduce in diameter uniformly when exposed to heat, conforming tightly to irregular shapes and contours.


Our facility operates 12 high-speed extrusion lines and electron-beam cross-linking irradiation units, yielding a stable monthly output of 3,000,000 meters of standard and custom-spec sleeves for OEMs and contract manufacturers globally.

 

 
 
Key Features

Uniform Shrinkage

Controlled longitudinal change (≤ ±5%) prevents pulling away from terminations during thermal recovery.

Dielectric Integrity

Withstands high voltage stress up to 36 kV/mm, preventing electrical arcing in tight panel spaces.

Mechanical Resilience

Resists abrasion, cutting, and continuous vibration in heavy-duty machinery.

 

Fluid & Chemical Resistance

Withstands prolonged exposure to diesel, hydraulic fluids, and cleaning solvents without softening or degradation.

 

Technical Specifications
 

Parameter

Standard Polyolefin (2:1)

Adhesive-Lined (Dual-Wall 3:1)

High-Temp PVDF (2:1)

Shrink Ratio

2:1

3:1 (with inner meltable sealant)

2:1

Operating Temp.

-55°C to +125°C

-55°C to +110°C

-55°C to +175°C

Min. Recovery Temp.

+110°C

+120°C

+150°C

Tensile Strength

≥ 10.4 MPa

≥ 14.2 MPa

≥ 34.5 MPa

Dielectric Strength

≥ 15 kV/mm

≥ 20 kV/mm

≥ 30 kV/mm

Flame Retardancy

VW-1 (Clear is non-flame retardant)

UL 224 (Outer wall)

UL 224 VW-1

 

Offshore Pipeline Heat Shrink Sleeve

 

Materials & Available Options

Base Polymers: Radiation cross-linked polyolefin (XLPO), Fluoropolymer (PVDF), Fluoroelastomer (Viton), and Chloroprene.


Configurations:

  • Single-wall thin-wall tubing for standard wire bundling.
  • Dual-wall adhesive-lined tubing (hot-melt adhesive inner layer) for moisture and corrosion sealing.
  • Medium/heavy-wall tubing for power cable insulation and repair.


Dimensions: Inner diameters ranging from 1.0 mm to 150 mm prior to shrinking.


Colors & Packaging: Black, white, red, blue, yellow/green (earth), and clear. Supplied in continuous spools, cut-to-length pieces (e.g., 25mm to 1200mm), or custom printed spools.

 

 

Applications

Electrical Panel Building: Busbar insulation, terminal strain relief, and phase identification in switchgear.


Automotive Harnesses: Sensor wiring protection in engine bays exposed to high heat and automotive fluids.


Heavy Equipment & Construction: Sealing splices on agricultural and mining machinery exposed to mud and high-pressure washing.


Telecom & Marine: Waterproof sealing of coaxial cable connections and antenna splices.

High-Temperature Heat Shrink Sleeve

 

Customization Capabilities

Dimensional Customization

Non-standard expansion ratios (4:1) and custom wall thickness tolerances upon engineering review.

Printing Services

Hot-stamp or thermal-transfer printing for part numbers, wire diagrams, or company logos directly on the sleeve surface.

Pre-Cut & Kit Packaging

Custom cutting tolerances (± 0.5 mm) and barcoded retail or assembly-line bagging.

 

Field Joint Coating Sleeve

 

Quality Control

Production runs undergo strict verification protocols in our in-house testing laboratory:


Dimensional Inspection: Laser micrometer monitoring during extrusion to ensure concentricity and wall thickness consistency.


Physical Testing: Tensile strength and elongation break testing using universal testing machines per ASTM D638.


Electrical Testing: Spark testing and dielectric breakdown voltage testing per IEC 60243.


Certifications: Manufacturing facilities operate under ISO 9001:2015 and IATF 16949 quality management systems. Products comply with UL 224, RoHS, and REACH directives. Test reports (COA/COC) accompany every shipment.

 

Packaging & Shipping

 

Three-Layer PE Heat Shrink Sleeve

Spool Packaging

Wound on rigid plastic or recycled cardboard reels, sealed in moisture-barrier polybags to prevent dust accumulation.

High-Temperature Heat Shrink Sleeve

Cut Pieces

Bundled in quantities of 100 or 1,000 pieces, packed in heavy-duty double-wall corrugated cartons.

Crosslinked Polyolefin Heat Shrink Sleeve

Logistics

Palletized and shrink-wrapped for container transport. Direct drop-shipping and FOB/CIF shipping terms available from major sea and air ports.

 

 

Frequently Asked Questions

 

Q: What is the difference between single-wall and dual-wall heat shrink sleeves?

A: Single-wall tubing provides mechanical protection and electrical insulation without inner coatings. Dual-wall tubing features an inner layer of hot-melt adhesive that melts and flows during shrinking, creating an environmental seal against moisture, dust, and corrosive liquids.

Q: How do I select the correct shrink ratio for my application?

A: Choose a sleeve whose expanded inner diameter is larger than the largest component (connector or terminal) it must slide over, and whose recovered inner diameter is smaller than the smallest wire bundle diameter to ensure a tight fit. A 2:1 or 3:1 ratio covers most standard wire management requirements.

Q: Are your heat shrink sleeves compliant with UL and environmental standards?

A: Yes. Our standard polyolefin and adhesive-lined sleeves carry UL 224 recognition and meet RoHS and REACH chemical substance restrictions. Full compliance documentation is available upon request.

Q: Can you supply pre-cut lengths and custom printing for wire identification?

A: Yes. We offer in-house cutting services with tight length tolerances and thermal-transfer printing for text, numbers, or barcodes directly onto the sleeve surface prior to shrinking.

Q: What is the typical lead time for standard versus custom orders?

A: Standard stock items in black and common sizes ship within 3 to 5 business days. Custom colors, print configurations, or non-standard dimensions typically require 10 to 15 business days of production lead time.

Q: Do you provide material test reports or Certificates of Analysis (COA) with shipments?

A: Yes. Every production lot undergoes physical and electrical testing. A Certificate of Analysis detailing batch test results is included with the shipping documentation or sent digitally prior to delivery.

 

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Request a Quote (RFQ)

To receive a formal quotation for industrial heat shrink sleeves, please provide the following parameters to our engineering sales team:
1.Material type (Polyolefin, PVDF, Adhesive-lined)
2.Expanded inner diameter and required shrink ratio
3.Color and wall thickness specifications
4.Required quantity (meters or piece counts)
5.Packaging preference (spools, cut lengths, or custom kits)
6.Target delivery destination (Port or postal code)

As one of the most professional heat shrink sleeves enterprises in China, we're featured by quality products and good price. Please rest assured to buy high-grade heat shrink sleeves in stock here from our factory. Contact us for customized service.