Blown Film(1)

Blown Film Unit 300

It is suitable for production of

small films used by the food

industry and in the packaging

field where the application of big

production machines is often not

profitable.

A compact unit for blowing,

cooling, take off and wind up

of extruded hoses.

application

Production control: Monitoring the dispersion performance of compounders or extruders used in batch production Inspection of incoming goods for gels and color distribution Inspection in polymer processing

Production:

Production of small films used by food industry and in the packaging field

Development:

For control of the maximum polymer extensibility To monitor the suitability of polymers or polymer blends in the laboratory

Blown Film Unit 300 with ALR - M station

Machine Frame:

The machine frame executedas a stable, movable and fixablesupport with a central telescope-type profile system.

Easy installation of all components.

The automatic lifting functionenables the Blown Film Unit tobe easily adjusted to anytake-off height

Combination with MBR Online rheometer to measure online MFR and Viscosity

Lab – extruder with exchangable cylinder diameter and length ( D= 20 / 30 mm / 1“ )

Blow Film Unit 300 – Göttfert Laboratory extruder

with touch srceen operating panel

with PC- Control – Software ROSwin

Trends and Display

Free definition of single display

trends

windows for measured

and evaluated parameters

Shear Viscosity

Extensional Viscosity

Correlation for IV

Calculation

Viscosity / Stress /

Extensional Viscosity Curves

Rheological Model Fits

First Normal Stress Difference

32bit Software running under Windows 2000 and XP

Data base structure with possibility of data

export to Microsoft Excel

Lab-Extrusion single screw

Drive:Laboratory extruder 2.2 kW max.screw diameter 30mmExtrusiometer 7.5 kW max.screw diameter 30mmExtrusiometer 25-30 kW screw diameter 45mm

Screw diameter: Screw length [L/D]20 mm 20/251” 2030 mm 20/2545 mm 20/25/30

Dies: rheometer die, round hole die

Downstream equipment: flat film, film blow, tubing device, filter measuring head, cable sheeting head, other equipment available

Blow Film Unit 300 - schematic

Force transducer

Decoupling unit

Tubeless winding

Deflection rolls

Force transducer

Decoupling unit

Tubeless winding

ROSWIN software

Blow Film Unit 300 - Blow Film Head / Blow Film Die

Blown Film Head:

The blown head / blown film die is attached to the laboratory means of a deflection head. The long orifice land ensures good homogenization and conveyance to the die outlet.

Standard dies

30 mm - 50 mm - 60 mm

- other diameter and on request -

- 1 x mandrel D = 50 mm

- 1 x orifice D = 51,0 mm => gap width of 0.50 mm -> LDPE

- 1 x orifice D = 51.5 mm => gap width of 0.75 mm -> HDPE

- 1 x orifice D = 52,0 mm => gap width of 1.0 mm -> HDPE

- 1 x orifice D = 52.4 mm => gap width of 1.2 mm -> LLDPE

- 1 x orifice D = 53,0 mm => gap width of 1.5 mm -> LLDPE

Applications for Polyethylen

Blown Film Unit 300 - dual lip cooling ring

1 Basic Body2 Cover disc3 Air conveyance plate4 Distance sleeve6 Air guiding ring7 Thread insert

8 Lower Lever9 Upper Lever13 Connection neck15 Insulation Ring17 entring Ring 18 Fixing block

fine adjustment

of the two gaps

The blow cooling ring operated at two blow levels

• even and sufficient distribution of cooling air

• very narrow tolerances in film thickness

Blown Film Unit 300 - Option cooling of cooling air

Display for set and

actual temperature

Temperature range -0 - + 40°C

• The additional cooling of the cooling air is

needed for the production of high transparency films

• Additional automatic Haze measurement

for QC is available

Maximum winding diameter 600 mm

Blow film unit 300 - take off unit / windig motor

Core-free winding upRoll width: 320mmFlattening width max. 300 mm

Take-off speed 0.1 - 50 m / min

Blow Film Unit 300 - Decoupling system

Decoupling system with adjustable traction force of 0-50 N

Force transducer

Blow Film Unit 300 – Film control system

• inspection of surfaces.

• quality control of transparent materials such as films, glass acrylic glass as well.

• detect fisheyes, blackspots, holes and other inhomogeneities in 10 different class sizes from 5 µm and upwards.

• lighting unit and high-speed line- sensor connected to a high performance image processing computer

optional

Blow Film Unit 300 - tempered nip roll

a strong circulation chiller byside ensure a precise and constant cooling of take off rolls or blow film

Nid roll tempered with water or heat transfer oil

Rubber nip roll

Temperature range

– 30°C - + 150°C

pressure up to 6 bar

Blow Film Unit 300 blow support with central adjustment

Blow Film Unit 300 – Features

Modular system: It's easy to add options and / or design it to a custom system.

Control: User friendly control panel:

Clear arrangement of all control modules and displays

Build in SPS control with adjustable parameter Error diagnosis Central alarm output makes it easy to handle

Decoupling arrangement: Isolates the forces of the pull off motor and enables the user to set a force

of 0- 50 N with a constant force on the film

Options

- Dual-lip cooling ring

- Cooling of the cooling air

- Film quality testing system

- Film tear monitoring

- Film width measurement controlled

- Haze measurement

- Gloss measurement

Blow Film Unit 300 - features / options

Features

- Decoupling system

- Winding-up reels for core-free winding up

- Central blow support adjustment

- Roll width 320 mm(other on request)

- Die dimensions

30/50/60 mm

(other on request)

- Take-off speed 0,1-50 m/min

- Controlled max.

50N take-off force