Cool Bubble

  • Medical film
  • Food films
  • Technical films
  • Die-Head Concept

Lines for the production of water-quenched blown films

Medical Films

Line layout

  • number of layers: 3 / 5 / 7
  • raw materials: PE, PP, EVOH, PVDC/PVC, EVA, EMA and others
  • film thickness: 40 μ – 800 μ
  • film width: 100 mm – 900 mm double layflat
  • output: 50 kg/h – 500 kg/h
  • line speed: 20 m/min – 100 m/min
  • suitable for clean room applications

Film characteristics

  • excellent optical properties (clarity and gloss)
  • extraordinary suppleness and elasticity
  • very low volatiles

F r e e z i n g   t h e   s h a p e

Application

Added values

  • by far the highest quenching rate (cooling rate) available
  • ability to process a very broad MFI range
  • highly amorphous and transparent film
  • very low gel count / low organoleptic values
  • minimum risk of internal contamination
  • multiple options in raw materials and film structures
  • turnkey solutions and operator training

Application areas

  • medical fluid bags (IV therapy and nutrition / blood bags)
  • applications requiring high puncture and tear resistance plus superior optical properties

Food Films

Line layout

  • number of layers: 5 / 7 / 9 / 11 / 13
  • raw materials: PE, PP, PS, PET, PA, EVOH, EVA, EMA, ionomer and others
  • film thickness: 40 μ – 800 μ
  • film width: 700 mm – 2.400 mm double layflat
  • output: 400 kg/h – 2.000 kg/h
  • line speed: 20 m/min – 100 m/min

Film characteristics

  • excellent optical properties (clarity and gloss)
  • outstanding mechanical properties (impact strength and puncture resistance)
  • excellent deep draw thermoformability (highly amorphous)

F r e e z i n g   t h e   s h a p e

Application

Added values

  • extremely high output (up to 2.000 kg/h)
  • ability to process very thick films (> 250 μm)
  • by far the highest quenching rate (cooling rate) available
  • highly amorphous and transparent film
  • multiple options in raw materials and film structures
  • turnkey solutions and operator training

Application areas

  • films for meat and cheese packaging
  • high barrier films for vacuum pouches
  • thermoforming films
  • vacuum-forming films
  • vacuum skin packaging (VSP) films

Technical Films

Line layout

  • number of layers: 1 / 3 / 5 / 7 / 9 / 11 / 13
  • raw materials: PE, PP, PS, PET, PA, EVOH, EVA, EMA, Elastomers, PVDC/PVC, TPU and others
  • film thickness: up to 2.000 μ
  • film width: 25 mm – 1.800 mm double layflat
  • output: 100 kg/h – 1.000 kg/h
  • line speed: 10 m/min – 100 m/min

Film characteristics

  • excellent formability and flexibility (exceptionally amorphous)
  • outstanding mechanical properties (impact strength and puncture resistance)
  • excellent optical properties (clarity and gloss)

F r e e z i n g   t h e   s h a p e

Application

Added values

  • high output (up to 1.000 kg/h)
  • high performance alternative to traditional tube extrusion
  • dimensional stability of the structure / tube
  • ability to process very thick films (up to 2.000 μm)
  • by far the highest quenching rate (cooling rate) available
  • ability to handle low melt strength polymers (MFI > 10)
  • multiple options in raw materials and film structures
  • turnkey solutions and operator training

Application areas

  • tube extrusion
  • mobility applications
  • pipe repair liners and other technical solutions
Re-con
Hi-con
Mo-con

Kuhne Anlagenbau GmbH

Kuhne Anlagenbau designs and manufactures blown film dies optimized for every application. For top quality and reliable supply, the dies are manufactured in-house in a state-of-the-art facility that guarantees the tightest design tolerances.

ReCon

HiCon®

MoCon®

Medical films are typically 3, 5 or 7-layer structures, depending on the application. Some of them require thermally sensitive polymers like PVC/PVDC, EVA or EVOH used in combination with polyolefins as the bulk material. It is important to optimize the die design for the structures to be produced.

Our ReCon (regular concept) spiral mandrel design is the proven solution for 3 and 5-layer structures. For more complex 7-layer structures, our MoCon® (modular concept) stackable plate die is ideal since it provides much more flexibility in film structure design.

Additionally, our MoCon® die can be configured with thermal isolation to be able to process very heat sensitive resins like PVDC. Both options, in conjunction with our precise manufacturing technology, delivers tight thickness tolerances for very thin layers.

Water quenched blown films used in food packaging are generally bottom forming webs of 9, 11 or 13 layers. These consist of several layers of PA coextruded with PE layers and an EVOH layer for barrier. Due to the most aggressive quenching in the market, Cool Bubble® lines designed for this application deliver very high output, which requires high processing pressure. Our MoCon® (modular concept) stackable plate die can operate with pressures up to 1000 bar and delivers the best combination of high output and excellent thickness control.

Choosing the right die design for a particular application depends on the film structure and properties of the polymers to be used. Our three die concepts offer all possible options for the best processing solution: (1) the ReCon (regular concept) spiral mandrel die, (2) the HyCon® (hybrid concept) die, a combination of spiral mandrels and stackable plate mandrels, and (3) the MoCon® (modular concept) stackable plate die. In many applications, our Cool Bubble® process, in combination with one of the die concepts above, makes it possible to provide a solution for industrial films or tubing that are difficult, inefficient, or impossible to produce by conventional blown film.

One example is the extrusion of tubing using tacky or sticky resins with low melt strength. Another example is the coextrusion of a high barrier film or tubing with PVDC, a very heat sensitive resin, as the barrier layer. In this case, our MoCon® die can be configured with thermal isolation in the PVDC layer to be able to process it without degradation. If required, this same layer can also be used to process EVOH without any changes. In all cases it is still possible to keep high outputs with great thickness control.

KUHNE Anlagenbau GmbH – we are member of the Kuhne Group

Blown Film, Flat Film & Sheet Extrusion

KUHNE Group is one of the leading European machine builders for film and sheet production.