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Trial Number 0

Trial Purpose:

To identify a low or non voc cleaner for the removal of ink from misprinted plastic parts.

Date Run:

01/28/2000

Experiment Procedure:

Seven cleaners were selected the lab’s database of effective testing and Industrial Cleaning Survey: Directory of Vendors 4th edition. Each solution was poured into a 250 ml glass beaker. A plastic part with ink printing was placed into each beaker and soaked for five minutes. After the soaking, the part was wiped with a paper towel for one minute. Observations were made and recorded. The parts were then reimmersed into the cleaning solution to soak for an additional ten minutes. Again, at the end of the soaking, parts were wiped and observed. Table 1 lists the cleaners used, the type of cleaning solution and the VOC contents.

Table 1 Chemistries Used

Company Name Product Trade Name VOC
Envirosolutions, Inc. BIO T Max 780 g/l
Gemtek Products SC 1000 0
Oakite Products InproClean 3800 None listed
Oakite Products InproClean 4000 T Not applicable
Valtech Corporation Valtron SP 2250-2LF None listed
Tarksol, Inc. HTF 85 B None listed
U.S. Polychem Corp. Polyspray Jet 790 P 0

SUBSTRATE MATERIAL: ABS Plastic Parts
CONTAMINANTS: Ink-RUCO Druckfarben Printing Ink 180-PE (G1-G12) (CAS#s: Cyclohexanone 108-94-1; Xylene 1330-20-7)
CONTAMINATING PROCESS USED: Received contaminated
CLEANING METHOD: Immersion and Manual wipe

Trial Results:

Four of the products (Bio T Max, Valtron SP 2250-2LF, HTF 85 B, Inproclean 4000 T) showed some signs of removing the ink from the plastic parts after the initial soaking. Table 2 lists the observations made for each cleaning solution evaluated.

Table 2. Five Minute Cleaning

Product Trade Name Observations
BIO T Max Some ink removal observed on the part
SC 1000 No cleaning
InproClean 3800 No cleaning
InproClean 4000 T Good Cleaning, ink on towel and part
Valtron SP 2250-2LF Some ink removal on towel
HTF 85 B Good removal, ink on towel and part
Polyspray Jet 790 P No cleaning

After cleaning for a total of 15 minutes, Bio T Max and Inproclean 4000 T were the only two products which had improved removal of the ink. Although HTF 85 B removed nearly all the ink, the cleaning solutions started to degrade the plastic material. Table 3 lists the results of the 15 minute cleaning.

Table 3. Extended Cleaning Time

Product Trade Name Observations
BIO T Max Excellent cleaning, no ink remaining on part
SC 1000 No improvement
InproClean 3800 No improvement
InproClean 4000 T Nearly all ink removed from part
Valtron SP 2250-2LF Some ink removal on towel, similar to 5 minute cleaning
HTF 85 B Nearly all ink removed from part, part becoming altered, soft
Polyspray Jet 790 P No improvement

Success Rating:

Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.

Conclusion:

From the initial testing of the ink printed parts, two cleaning solutions were identified as potential replacement cleaners. The products were Envirosolutions Bio T Max and Oakite Products Inproclean 4000 T.

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