Difference Between Single Wall Heat Shrink Tubing and Double Wall Heat Shrink Tubing
2025-02-19
1.Single wall heat shrink tubing
Definition: A rigid sleeve of heat-shrinkable film material that is formed into a tubular intermediate product by extrusion of a polymer or polymer alloy and then cross-linked, heated, expanded, cooled, and shaped by irradiation (or a chemical agent).
Features: (1) The inner wall is uncoated and consists of only one material.
(2) Suitable for general insulation, protection and stationary purposes.
(3) Low cost and suitable for application scenarios that do not require sealing.
2.Double wall heat shrink tubing
Definition: A layer of hot melt adhesive is applied to the inner wall of conventional heat shrink tubing to form a two-layer structure.
Features: (1) The inner wall is coated with hot melt adhesive, and the adhesive layer is melted after heating to create a sealing effect.
(2) It is suitable for scenarios that require sealing requirements such as waterproof, moisture-proof and dust-proof.
(3) Excellent sealing performance, often used to protect waterproof insulation in power installations, communication cables and other fields.
3. Heat shrink tube with middle wall coating
Definition: A special type of double-walled heat shrink tubing with an inner wall coated with spiral hot melt adhesive.
Features: (1) Radiation cross-linking process to ensure the mechanical strength and heat resistance of the pipe.
(2) The inner wall is directly coated with hot melt adhesive, and the sealing effect is excellent.
(3) It is suitable for insulation protection in medium and low voltage power projects and waterproofing requirements of communication technology.
4.Main differences
| characteristic | Single Wall Heat Shrink Tubing | Double Wall Heat Shrink Tubing |
| structure | Single layer, no inner wall coating | Double-layer, inner wall covered with hot melt adhesive |
| Closeness | No sealing function | It has excellent sealing performance |
| Application scenarios | General insulation, protection, fixation | Waterproof, moisture-proof, dust-proof and other sealing needs |
| cost | Nizhny | Upper |
5.Resume
Single wall heat shrink tubing: simple structure, suitable for general insulation and protection, low cost.
Double Wall Heat Shrink Tube: The inner wall is coated with hot melt adhesive, which has excellent sealing performance and is suitable for special needs such as waterproof and moisture-proof.
Selection Guide: Select the correct type based on the specific needs of the application (eg whether a seal is required).
