Surface Treatment - Page 4
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Table 2.
Chemical-Etching Processes
| Material |
Chemical Treatment |
Temperature |
Immersion Time |
Post-Preparation |
| Polyester (PET & PETG) |
Sodium hydroxide, 20 pbw
Distilled water, 80 pbw |
70-96oC |
10 min. |
Rinse in hot water and hot-air-dry |
| Fluorocarbon polymers |
Naphthalene, 13.0 pbw
Sodium, 2.0 pbw
Tetrahydrofuran, 85.0 pbw |
70-90'C |
2 min. |
Rinse in MEK and toluene, then rinse in
distilled water |
| Low-density polyethylene |
Potassium dichromate, 5%
Distilled water, 7%
Concentrated sulfuric acid, 88% |
70'C |
30 min. |
Rinse in distilled water |
| High-density polyethylene |
Potassium dichromate, 0.5%
Distilled water, 9.5%
Concentrated sulfuric acid, 90% |
20oC |
5 sec |
Rinse in distilled water |
| Polypropylene |
Potassium dichromate, 5%
Concentrated sulfuric acid, 95% |
20'C |
1 min. |
Rinse in distilled water |
| Acetal homopolymers |
1,4-Dioxane, 44.0 pbw
Perchloroethylene, 54.0 pbw
p-Toluene sulfuric acid, 2.0 pbw |
80-120*C |
5-30s |
Heat-treat at 120C for 1 min.; rinse in tap
water |
| Polyamides or polysulfones |
Phenol, 80.0 pbw
Distilled water, 20.0 pbw |
70-90'C |
Brush on |
Rinse off twice with tap water |
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The Wiley Encyclopedia of Packaging Technology, Second Edition, Edited by Aaron L.
Brody and Kenneth S. Marsh - ISBN 0-471-063975-5 © 1997 by John Wiley & Sons, Inc. |
