A Novel Continuous Extrusion Process to Fabricate Wedge-Shaped Light Guide Plates

Table 4

Edge deformation values under different temperatures of the bottom heater and Roller 3 (Unit: mm).

Roller 3	Bottom heater
	130°C				140°C				150°C
100°C	0	>−0.5	+0.5*		0	0	+0.3		0	0	+0.1
	>−0.5		+0.5		>−0.5		+0.25		>−0.5		0
	0	>−0.5	+0.5		0	+0.2	+0.3		0	0	0
110°C	0	−0.5	+0.5		0	−0.5	+0.3		0	−0.4	0
	−0.5		+0.5		−0.5		+0.2		−0.45		0
	0	−0.5	>+0.5		0	−0.45	+0.15		0	−0.4	0
115°C	0	−0.3	+0.5		0	−0.2	+0.2		0	−0.2	0
	−0.1		+0.5		0		+0.1		0		−0.1
	0	−0.3	>+0.5		0	−0.1	+0.1		0	−0.2	0
120°C	0	−0.1	>+0.5		+0.1	0	+0.2		0	0	0
	+0.2		+0.5		+0.1		+0.2		0		−0.1
	0	0	>+0.5		0	0	+0.2		+0.1	0	0

∗The eight values in each combination of the bottom heater and Roller 3 are the measure results corresponding to the positions from p1 to p8 in Figure 6, respectively.