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The average void contents of the different laminates.
| Experimental Group | 1-1 | 1-2 | 1-3 | 2-1 | 2-2 | 2-3 | 3-1 | 3-2 | 3-3 |
|---|---|---|---|---|---|---|---|---|---|
| Void content (%) | 1.148 | 2.772 | 3.057 | 1.275 | 1.561 | 0.947 | 3.193 | 4.678 | 2.118 |
Note: “1-1” represents experimental group under the first level of laying speed and the first level of the preheating temperature, see Table 3.
