Features and differences that must be understood for single/double wall heat shrinkable tubing

Single/double wall heat shrinkable tube is composed of radiation cross-linked polyolefin material and double layer of hot melt adhesive, and the outer layer of polyolefin and the inner layer of hot melt adhesive are composed. The main functions are insulation, sealing, waterproof, anti-corrosion, anti-leakage, etc.

The shrinkage ratio of single/double-wall heat shrinkable tube is double, triple and quadruple; the shrinkage temperature is 80 ~ 100 ℃; the temperature for many years of operation is -45 ~ 125 ℃.

How to store single wall heat shrink tubing and double wall heat shrink tubing?

Usually, customers sometimes buy two kinds of heat shrinkable tubes at the same time and store them together, but after a long time of storage, the single-walled tube can be used, and the double-walled tube cannot be used. What is the reason for this?

The single-wall heat shrinkable tube has only one layer of polyethylene base material, no glue, and its placement environment requirements are lower. Therefore, it can be used normally after being stored for a long time.

The outer layer of the double-wall glued heat shrinkable tube is a polyethylene base material, and the inner layer is a co-extruded hot sol. Because it contains thermosol.

Features of Thermosol:

1. Curability: It is usually solid at room temperature, melts into liquid when heated to a certain extent, and quickly becomes solid once cooled below the melting point. When using, as long as the hot melt adhesive is heated and melted into the required liquid state, and applied to the object to be adhered, the bonding and curing can be completed within a few seconds after pressing, and the hardening, cooling and drying can be achieved within a few minutes. degree;

2. Re-adhesion: The adhesive layer after the hot sol is applied to the adherend after cooling and solidification can also be heated and melted again, and then re-adhesive and then bonded to the adherend, with a certain degree of re-adhesion;

3. Strong and tough, with fast curing, low pollution and strong adhesion, the adhesive layer has certain flexibility, hardness and certain toughness.

The double-wall heat-shrinkable tube is also called the double-wall glued heat-shrinkable tube, because a layer ofhot melt adhesive; is applied in the middle, and the hot melt adhesive will be cured and the viscosity will decrease with the influence of time and environment, and it cannot be Therefore, when storing double-walled heat shrinkable tubes, we should try to ensure that the ambient temperature is lower than 35 °C, and pay attention to dust, moisture, ventilation, etc.

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