What is the main row materials for heat shrinkable tubing?

The main raw material for heat shrinkable tubing is typically a type of polymer, commonly polyolefin. Polyolefin heat shrink tubing is widely used due to its excellent properties such as flexibility, durability, electrical insulation, and resistance to chemicals and heat. Polyolefin heat shrink tubing is often made from materials such as:

1. Polyethylene (PE): Both low-density polyethylene (LDPE) and high-density polyethylene (HDPE) are used in the production of heat shrink tubing. PE-based heat shrink tubing is known for its flexibility and resistance to abrasion.

2. Polyvinyl Chloride (PVC): PVC heat shrink tubing is another common option, offering good electrical insulation properties and resistance to oils, fuels, and chemicals.

3. Fluoropolymers (e.g., PTFE): Fluoropolymer-based heat shrink tubing, such as polytetrafluoroethylene (PTFE), is used in applications requiring high-temperature resistance, chemical resistance, and low friction.

4. Polyolefin (e.g., Polyolefin): Polyolefin-based heat shrink tubing, which is a blend of various polymers, is widely used due to its versatility, excellent electrical insulation properties, resistance to chemicals, and ease of installation.

These materials are processed using extrusion techniques to manufacture heat shrink tubing in various sizes, thicknesses, and shrink ratios to suit different applications and requirements. Additionally, additives may be incorporated into the polymer formulations to enhance specific properties such as flame resistance, UV resistance, or color pigmentation.