English
technissis.gr > Products > Leister > Process Heat > Processes > Shrinking
Shrinking with hot air
Simple and tight

Hot air is ideal for processing shrink films and shrink-on hoses.

There are two main areas:
heat shrinking within packaging technology and heat shrinking in electrical engineering.

Packaging
Shrink films are often used in the context of packaging. These films have been stretched during the manufacturing process and when heated return to their original shape because of what is known as the "memory effect". During packaging, a tubular shrink film is usually placed around the product being packaged. When it is subsequently heated with hot air, the film constricts until it hugs the packaged product. This process is used both for small products (such as lipsticks) and entire pallets that have been loaded with goods. Hot air shrinking is also widely used in beverage packaging applications.

  • Instead of having a label applied to them, individual bottles are often wrapped in a decorative shrink-on hose, which in this case is referred to as a "sleeve". This may only cover part of the bottle or may extend across the entire height.
  • Another typical application is the use of shrink film to create a pack of between six and twenty-four bottles or cans.
  • Shrink-on caps are placed over wine bottle closures (screw tops or corks) to protect them against dirt or for decorative purposes. When these preformed caps are exposed to hot air, they shrink tightly around the neck of the bottle and closure.
The following materials are commonly used for shrink films, depending on the application: polyolefins (PP and PE), PET, and PVC.

Electrical engineering
In the field of electrical engineering, shrink-on hoses are used for electrically insulating bare wires, for combining several cables, and for protecting contacts. They are available in various sizes. The material is usually safe against fire. Leister offers hot-air blowers in conjunction with shrink nozzles that are appropriate for the application concerned. This enables the heat shrinking process to be carried out quickly and safely whether you are performing it manually or producing cable harnesses with an automatic system.

Leister has the solution
With Leister air heaters and hot-air blowers, you can process shrink films and shrink-on hoses of any size in all kinds of applications. Thanks to the precise temperature control, the process is easy to automate and runs quickly and safely.


LHS Air heater
LHS 15 CLASSIC
Smallest of the LHS Series. Detection of heating element and device overheating with alarm output.
more
 
LHS 15 PREMIUM
Smallest of the LHS Series. Heating power steplessly adjustable with potentiometer.
more
 
LHS 15 SYSTEM
Smallest of the LHS Series. Remote control interface for Leister CSS or SPS temperature controller.
more
LHS 21S CLASSIC
Only 67 mm wide. Detection of heating element and device overheating with alarm output.
more
 
LHS 21S PREMIUM
Only 67 mm wide. Heating power steplessly adjustable with potentiometer.
more
 
LHS 21S SYSTEM
Only 67 mm wide. Remote control interface for Leister CSS or SPS temperature controller.
more
LHS 21L CLASSIC
Only 67 mm wide. Detection of heating element and device overheating with alarm output.
more
 
LHS 21L PREMIUM
Only 67 mm wide. Heating power steplessly adjustable with potentiometer.
more
 
LHS 21L SYSTEM
Only 67 mm wide. Remote control interface for Leister CSS or SPS temperature controller.
more
LHS 41S CLASSIC
Wide array of applications. Detection of heating element and device overheating with alarm output.
more
 
LHS 41S PREMIUM
Wide array of applications. Heating power steplessly adjustable with potentiometer.
more
 
LHS 41S SYSTEM
Wide array of applications. Remote control interface for Leister CSS or SPS temperature controller
more
LHS 41L CLASSIC
Wide array of applications. Detection of heating element and device overheating with alarm output.
more
 
LHS 41L PREMIUM
Wide array of applications. Heating power steplessly adjustable with potentiometer.
more
 
LHS 41L SYSTEM
Wide array of applications. Remote control interface for Leister CSS or SPS temperature controller
more
LHS 61S CLASSIC
High performance. Detection of heating element and device overheating with alarm output..
more
 
LHS 61S PREMIUM
High performance steplessly adjustable with potentiometer.
more
 
LHS 61S SYSTEM
High performance. Remote control interface for Leister CSS or SPS temperature controller.
more
LHS 61L CLASSIC
High performance. Detection of heating element and device overheating with alarm output.
more
 
LHS 61L PREMIUM
High performance steplessly adjustable with potentiometer.
more
 
LHS 61L SYSTEM
High performance. Remote control interface for Leister CSS or SPS temperature controller.
more
LHS 91 BASIC
Our most powerful device, with up to 40 kW.
more
 
LHS 91 SYSTEM
40 kW device. Remote control interface for Leister CSS or SPS temperature controller.
more
   

LE Air heater
LE MINI
Smallest air heater. Suitable for where heat application is concentrated to a point.
more
 
LE MINI SENSOR
Smallest air heater with integrated temperature probe. For heat application concentrated to a point.
more
 
LE MINI SENSOR KIT
Smallest air heater with integrated temperature probe and pressure reducing valve. For heat application concentrated to a point.
more
LE 5000 DF
Energy savings effect thanks to hot air recirculation. Maximum air inlet temperature 160C.
more
 
LE 5000 DF-R
Energy savings effect thanks to hot air recirculation. Maximum air inlet temperature 350 C.
more
 
LE 5000 HT (up to 900 C)
High temperature air heater up to 900C. Minimal air volume 600 Nl/min.
more
LE 10000 DF
Energy savings effect thanks to hot air recirculation. Maximum air inlet temperature 160C.
more
 
LE 10000 DF HT (up to 900 C)
Energy savings effect thanks to hot air recirculation. Maximum air inlet temperature 160 C.
more
 
LE 10000 DF-R
Energy savings effect thanks to hot air recirculation. Maximum air inlet temperature 350 C.
more
LE 10000 DF-R HT (up to 900 C)
Energy savings effect thanks to hot air recirculation. Maximum air inlet temperature 350 C.
more
 
LE 10000 HT (up to 900 C)
High temperature air heater up to 900C. Minimal air volume 800 Nl/min.
more
   

Hot-air blower
MISTRAL 2 PREMIUM
Integrated heating element and tool protection, code switch for potentiometer (internal/external).
more
 
MISTRAL 4 PREMIUM
Carbon changer, integrated heating element and tool protection, code switch for potentiometer.
more
 
MISTRAL 6 PREMIUM
Brushless, maintenance-free blower motor. Eminently suitable for continuous operation.
more
MISTRAL 6 SYSTEM
Integrated control or external system interface. Brushless, maintenance-free blower motor.
more
 
HOTWIND PREMIUM
Air volume steplessly adjustable with potentiometer up to 900 l/min.
more
 
HOTWIND SYSTEM
Interface with alarm contact and potentiometers for stepless control of heater and blowers.
more
VULCAN SYSTEM
The powerhouse of the hot-air blowers. Its performance speaks for itself.
more
       

Blower
SILENCE
Very quiet operation with 61 dB(A). Large air volumes and can be installed in all positions.
more
 
ASO
Conveys 15,900 l/min of air at 60 Hz. Can be used simultaneously for several air heaters with suitable accessories.
more
 
ROBUST
Can be installed in all positions. Indestructible under extreme operating conditions and in continuous operation.
more
AIRPACK
Provides large air volumes at high pressure.
more
 
MONO 6 SYSTEM
Impresses with small dimensions and large air volume of up to 600 l/min.
more
   

Control components
FC 2200
Improves hot air processes. Air volume and heating capacity can be adjusted independently of one another.
more
 
FC 550
Improves hot air processes. Air volume and heating capacity can be adjusted independently of one another.
more
 
CSS EASY
Suitable for LHS SYSTEM air heaters.
more
CSS
Temperature controller for universal use. For LHS SYSTEM and LE MINI SENSOR air heaters.
more
 
KSR DIGITAL
Suitable for LE 5000 /10,000 HT, LE 5000 / 10,000 DF, LE 5000 / 10,000 DF-R air heaters.
more
 
Three-phase adjustment unit DSE
Three-phase controller. External stepless adjustment of non-electronic air heaters.
more