During our initial development of Pennacle®, a palette of pigments and dyes were established that had little to no effect on the rate of crystallization of PET. From this, a series of industry standard colors were developed and sent to an outside lab for analysis. Free Blow experiments were conducted to evaluate the effect of Pennacle® on Natural PET resin. In two stages preforms were molded, then conditioned and free blown to evaluate blow parameters and physical properties. The results of these experiments are listed below. This palette is the basis for all Pennacle® color matches made today in PET.
| Penn Color Code |
Color |
Intrinsic Viscosity(IV)1
dL/g |
% IV
Retention |
Heat
Stability F |
% Let
Down
Ratio |
Regulatory2 |
Eastman 7352
Natural PET |
Clear |
0.709 |
100% |
NA |
NA |
FDA/CONEG |
| 66W42 |
White |
0.707 |
99.72% |
575 |
1.00% |
FDA/CONEG |
| 66S114 |
Blue Tint |
0.706 |
99.58% |
550 |
0.50% |
FDA/CONEG |
| 66G120 |
Green Tint |
0.704 |
99.30% |
550 |
1.00% |
FDA/CONEG |
| 66N122 |
Trans. Amber |
0.702 |
99.01% |
550 |
1.00% |
FDA/CONEG |
| 66Z121 |
Metallic Silver |
0.699 |
98.59% |
550 |
2.00% |
FDA/CONEG |
| 66S151 |
Cobalt Blue |
0.704 |
99.30% |
550 |
2.00% |
FDA/CONEG |
| 66B119 |
Black |
0.698 |
98.45% |
575 |
1.00% |
CONEG |
| 66B158 |
FDA Black |
0.700 |
98.7% |
600 |
1.00% |
FDA/CONEG |
| 66R116 |
Red |
0.694 |
97.88% |
545 |
2.00% |
FDA/CONEG |
1. Method: ASTM D 4603
Concentration: 0.50% (wt/v)
Solvent: 60/40 phenol/TCE
Temperature: 30°C
2. FDA letters available upon request
| Suggested Preform Molding Conditions |
| Temp Settings (°C) |
Feed
|
275 |
Zone 2
|
275 |
Zone 3
|
275 |
Zone 4
|
274 |
Nozzle
|
264 |
| Injection Flow Rates |
1st (ccm/sec)
|
10 |
2nd (ccm/sec)
|
8 |
| Dosage |
4.83 |
| Injection Time (sec) |
2.30 |
| Holding Pressures |
1st Hold Pressure (bar)
|
400 |
2nd Hold Pressure (bar)
|
475 |
3rd Hold Pressure (bar)
|
300 |
4th Hold Pressure
|
300 |
Back Pressure (bar)
|
35 |
| Screw Speed (m/min) |
8.0 |
| Cooling Time (sec) |
12.0 |
| Total Cycle Time (sec) |
25.63 |
Each of our PENNACLE® stock colors were developed for use under the above conditions. Slight adjustments to the processing conditions may be necessary to optimize the quality of the finished product.
For more information contact us or send for a brochure.
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