Light reflector, and planar light source device and illuminating device using light reflector
一种光反射体、光反射的技术，应用在照明装置、电光源、显示装置等方向，能够解决亮度不均匀、出现亮线等问题，达到抑制亮度不均匀、不容易晕光的效果
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Embodiment 1、4、5、8
[0135] Compositions (A) and (B) were obtained by blending the materials described in Table 1 in the proportions described in Table 2, and each of the obtained compositions (A) and (B) was melted at 250° C. using three extruders. kneading. Thereafter, it is supplied to one co-extrusion die, and the composition (A) and the composition (B) are laminated in the die in the form of (B) / (A) / (B), and extruded into a sheet form, It cooled to about 60 degreeC with the cooling roll, and obtained the laminated body.
[0136] This laminate was reheated to 145° C., and then stretched at the magnifications described in Table 2 in the machine direction (machine direction: MD) by utilizing the peripheral speed difference of a plurality of roll groups.
[0137] Next, the laminate was reheated to 160° C., and stretched at the ratios listed in Table 2 in the transverse direction (width direction: CD) by a tenter. Thereafter, annealing was performed at 160° C., and then cooled to 60° C., and the...
Embodiment 2
[0139] The materials described in Table 1 were blended in the ratio shown in Table 2 to obtain a composition (A), and the obtained composition (A) was melt-kneaded at 250° C. using an extruder. Thereafter, it was extruded into a sheet form and cooled to about 60° C. with a cooling roll to obtain an unstretched sheet (A) of the composition (A). This sheet was reheated to 145° C., and stretched in the longitudinal direction at the magnifications listed in Table 2 by using the peripheral speed difference of a plurality of roll groups to obtain a longitudinally stretched sheet (A).
[0140] The composition (C) consisting of PP2 listed in Table 1 was melt-kneaded at 250°C using an extruder, and the composition (C) was melt-extruded on both sides of the longitudinally stretched sheet (A) obtained above. , stacked in the form of (C) / (A) / (C). Next, this laminate was reheated to 160° C., and stretched at the ratios listed in Table 2 in the transverse direction with a tenter. Thereaft...
Embodiment 3
[0144] The materials described in Table 1 were blended in the ratio shown in Table 2 to obtain a composition (A), and the obtained composition (A) was melt-kneaded at 250° C. using an extruder. Thereafter, it was extruded into a sheet form and cooled to about 60° C. with a cooling roll to obtain an unstretched sheet (A) of the composition (A). This sheet was reheated to 145° C., and stretched in the longitudinal direction at the magnifications listed in Table 2 by using the peripheral speed difference of a plurality of roll groups to obtain a longitudinally stretched sheet (A).
[0145] Mix the materials described in Table 1 in the ratio described in Table 2 to obtain a composition (B), use an extruder to melt and knead the obtained composition (B) at 250°C, and melt and extrude the composition (B) Both surfaces of the longitudinally stretched sheet (A) obtained above are laminated in a manner of (B) / (A) / (B). Next, the laminate was reheated to 160° C., and stretched at the ra...
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Abstract
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