Optimization of technique parameters of pneumatic molding for rice straw bowl tray.

As can be seen in Table 4 , regression equation models of bowl hole molding rate Y 1 , relaxation density Y 2 and rupture-resisting strength Y 3 meet P<0.01, indicating that the model regression is extremely significant; If aberrant term of Y 1 , Y 2 and Y 3 meet P>0.05, indicating that the insufficient fit was not significant, and the regression equations have favorable fitting effect and practical analytical significance; The multiple correlation indices R 2 of Y 1 , Y 2 and Y 3 are 0.94, 0.96 and 0.94 respectively, which are all greater than 0.93, indicating that the models can explain more than 93% of response value changes, the predicted value is highly correlated to actual value and test error is small.

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