Zaunlücke 28 • 97237 Altertheim • Tel. +49 (0) 93 07 / 4 08 • Fax +49 (0) 93 07 / 17 12e-Mail semrau@coppex.de • Internet www.coppex.de

COPPEXCleaning pellets for plastic processing machines

RECOMMENDED APPLiCATiONS

Semrau KunststofftechniK

COPPEX – Cleaning pellets for injection moulding machines, extruders, blow moulding machines, film blowing plants.

COPPEX was developed for the plastic industry as a quick and timesaving detergent to clean extruders and screws.

COPPEX are universal cleaning/purging pellets for the thermoplastic plastic production and fashioning.

COPPEX is excellent for (the) cleaning/purging before the change of color or material.

COPPEX can easily be used for the cleaning/purging of hotrunner tooling.

Depending on the diameter of the screw between 0,5 to 50 kg of COPPEX are needed for one cleaning/purging procedure. Before cleaning extruders the screens must be demounted (breaker plates can remain within the machine). The speed of the screw must be reduced by 30%. To clean hotrunner tooling the temperature in the hotrunner must be raised by 20-50 ° C depending on the material in the tooling. Before longer runtimes and longer periods of inactivity (e.g. weekends or holidays) it is advisable to implement a prophylactical intermediate cleaning, COPPEX can remain within the machine until the next start-up. When the machine is clear of COPPEX the material to be manufactured can be added. On reaching the operating conditions the production can be continued. if the contamination is severe, a second cleaning/purging process is advisable. COPPEX should remain within the machine for 15 minutes and the temperature of the screw should be reduced by 10 to 20 % before the cleaning process starts.

RECOMMENDED APPLiCATiONS

Semrau KunststofftechniK

Plastic processing machines

ProceduralSteps

Injection moulding machines with conventional tooling

Injection moulding machines with hotrunner tooling

Extruders Blow moulding machines and film blowing plants

1. Setting of the purging temperature

• Keep normal processing temperature in the screw and at the nozzle

• Keep normal processing temperature in the screw and at the nozzle

• Raise temperature in hotrunner tooling by 10 – 50°C to clean the core

Keep normal processing temperature in the extruder, around the breaker plates and in the profile tooling

Keep normal processing temperature in the extruder, around the breaker plates and in the head

Note:If possible, remove screens before commencing with purging! Raise temperature slightly in the breaker-plate region when screens are still in place.

2. Purging • Reduce screw revolution by approx. 30 %

• Unchangend back- pressure

• Adjust maximal screw stroke

• Purge the screw always before the hotrunner

Note: The purge can also injected into the closed mould (depending on machine). This allows cleaning of the tooling at the same time.

• Unchangend back- pressure

• Adjust maximal screw stroke

• Purge the screw always before the hotrunner

Note: The purge can be injected into the closed hotrunner tooling as well as through the opened mould.

• With open tooling you achieve an extremely quick purging

3. “Flushing” • Follow up, after the purging mix has gone through, with pure plastic granules of the type required by the production to follow. (Quantity: approx. 30% of the amount of the purging granules)

4. Setting of the next operating conditions

• Set all temperatures according to requirements of the plastic raw material which is following.

• Set backpressure as required

• Set screw stroke as required

• Set hotrunner temperature as required

• Set backpressure as required

• Set screw stroke as required.

Note: Inset screens again, if required

Semrau KunststofftechniK

Type of Plastic Abbreviation Processing Temperature Range (Processing temperature = purging temperature)[°C] [°F]

Purging Temperature Range *

[°C] [°F]

Acrylnitril-Butadien-Styrol-CopolymerCelluloseacetatPEAKPlexiglasPolyamidPolycarbonatPolyester (linear)PolyethylenPolyoxymethylenPolypropylenPolystyrolPolysulfonPolyvinylchloridPolyvinylidenfluoridStyrol-AcrylnitrilThermoplastisches Polyurethan

ABSCAPEAKPMMAPAPCPETP/PBTPHDPE/LDPEPOMPPPSPSUPVCPVDFSANTPU

200 – 250220 – 260370 – 390210 – 230250 – 280280 – 330230 – 300180 – 250170 – 210200 – 250200 – 270350 – 400160 – 180200 – 220200 – 220200 – 220

170 – 190190 – 230340 – 360180 – 200220 – 230230 – 280200 – 250150 – 190140 – 170170 – 200170 – 210320 – 350170 – 200170 – 190180 – 200170 – 190

TEMPERATURES/PROPORTiONS

Screw diameter [mm]

Recommen-ded amount of COPPEX* [kg]

20 – 40

0,5 – 2

40 – 50

2 – 5

50 – 60

5 – 10

60 – 80

10 – 25

80 – 100

25 – 50

100 – 120

50 – 75

120 – 150

75 – 90

150 – 175

90 – 120

175 – 200

120 – 200

*) Approximate values; depending on length of screw and degree of contamination. (On very long screws with very high degree of contamination use up to 2-3 times of the purging mix quantity).

QUANTiTy REQUiRED OF COPPEX

Processing and Purging Temperatures:COPPEX PPi 180 up to 300°CCOPPEX PPT 180 up to 300°CCOPPEX PEH 180 up to 300°C

Just ask us!

Zaunlücke 28 • 97237 Altertheim • Tel. +49 (0) 93 07 / 4 08 • Fax +49 (0) 93 07 / 17 12e-Mail semrau@coppex.de • Internet www.coppex.de

COPPEXReinigungsgranulat für Kunststoffverarbeitungsmaschinen

*) These temperatures must only be adjusted with heavy contaminations or if the first purging run was not successful.

390 – 480430 – 500700 – 735410 – 445480 – 535535 – 625445 – 570355 – 480340 – 410390 – 480390 – 520660 – 750320 – 355390 – 430390 – 430390 – 430

340 – 375375 – 445645 – 680355 – 390430 – 445445 – 535390 – 480300 – 375285 – 340340 – 390340 – 410610 – 660285 – 320340 – 375355 – 390340 – 375

Semrau KunststofftechniK