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 re-immersed 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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