FREQUENTLY ASKED QUESTIONS
CHOICE OF INTERNAL DIAMETER FOR HEAT SHRINK SHEATHS
Question: How can I calculate the optimal inner diameter of a heat-shrinkable sheath?
Answer: There are several ways to identify the optimal internal diameter to be used to cover a given object:
1) The general principle used is that the internal diameter is chosen in such a way that after vacuum shrinking, it is 20% less than the object to be covered.
2) Having established the diameter of the object to be covered, the width of the flattened heat-shrinking sheath can be determined by applying the formula 1.57079 x diameter.
3) Having established the width of the flattened heat-shrinking sheath available, the diameter of the object to be covered can be determined using the formula 0.6366 x sheath width.
CONVERSION TABLE FOR UNITS OF MEASUREMENT
Question: How can I convert the inside diameter size of a heat shrink sheath from inches to mm?
Answer: If the unit of measurement of the required internal diameter is expressed in inches, the measurement can be converted into mm using the table below.
ITEM CODE COMPARISON TABLE
Question: Can I identify and compare your article code with article codes of other manufacturers of heat shrinkable sheaths and expandable braided sheaths?
Answer: You can, by consulting the comparison table below. If you do not identify the item code you are interested in, we recommend that you contact our technical department.
Note: This is only an indicative table, in some cases our products may not be exactly equivalent to what is indicated. Therefore, before purchasing and using our sheaths, as an alternative to those of other manufacturers, we suggest you contact us for verification.
CUTTING THE HEAT SHRINK SHEATHS
Question: What measures should be implemented to correctly cut heat shrink sheaths?
Answer: When cutting a heat shrink sheath, you have to make sure that the ends are cut with extreme precision. Inaccurate and irregular cutting may cause the heat shrink sheath to break during the shrinking phase.
HEATING METHODS FOR SHRINKAGE OF HEAT SHRINK SHEATHS
Question: What are the most effective methods to use for shrinking a heat shrinkable sheath?
Answer: Heat shrink sheaths must be shrunk starting from one end, the most critical end, and then proceed slowly towards the opposite end. This method avoids the formation of air bubbles between the inner wall of the heat shrink sheath and the object it covers.
To obtain an optimal shrinkage result, it is advisable to use equipment made for this specific operation, such as hot air guns or tunnels.
In the event that the object to be covered is made of metal or a good heat conductor, the ideal solution is to pre-heat the object to avoid “cold areas”, so as to allow perfect and soft adaptation of the heat-shrinking sheath.
In order to avoid overheating of the heat shrink sheath, ensure there is regular heat distribution. Excessive overheating of the material during the shrinking process can cause bubbling, discoloration and in some cases even breakage of the heat shrink sheath.
STORAGE AND CONSERVATION OF HEAT-SHRINKABLE SHEATHS
Question: Can heat-shrinkable sheaths be stored outside warehouses?
Answer: For proper storage of heat-shrinkable sheaths, it is necessary to ensure that they are stored in a cool, dry, clean place but above all far from direct heat sources. The correct storage temperature is 0 – + 40°C max with a relative humidity of >75%.
OPERATIONAL PRECAUTIONS FOR THE USE OF HEAT SHRINKING SHEATHS
Question: During the heating phases of the heat-shrinking sheaths, what precautions should be taken?
Answer: During the shrinking phases of the heat shrinking sheaths, it is very important to ensure that the workstation is well ventilated. In the event of insufficient ventilation, equip the workstation with an air intake system.
OPERATIONAL ARRANGEMENTS FOR THE USE OF EXPANDABLE BRAIDED SHEATHS
Question: During the hot cutting phases of expandable braided sheaths, what precautions should be taken?
Answer: During the hot cutting phases of expandable braided sheaths, it is very important to ensure that the workstation is well ventilated. In the event of insufficient ventilation, equip the workstation with an air intake system.
Got any questions for us?
Contact our technical office tecnico@rtecomponenti.it