Polyester resin piece for solar cell, laminated product using same, solar cell back protection chip and component
A technology for solar cells and polyester resins, applied in the field of solar cells, can solve the problem of not using a back sheet, and achieve the effects of improving hydrolysis resistance, excellent hydrolysis resistance, and photoelectric conversion efficiency.
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Embodiment 1～4
[0157] Mix 64 parts of ethylene glycol with 100 parts of dimethyl terephthalate (parts by weight: hereinafter simply referred to as parts), and then add 0.1 part of zinc acetate and 0.03 part of antimony trioxide as a catalyst, and at the reflux temperature of ethylene glycol, transesterification was carried out.
[0158] 0.08 part of trimethyl phosphate was added there, the temperature was gradually raised, the pressure was reduced, and polymerization was performed at a temperature of 271° C. for 5 hours. The intrinsic viscosity of the obtained polyethylene terephthalate was 0.55. Cut the polymer into sheets with a length of 4 mm. The sheet shape of PET (polyethylene terephthalate) is cylindrical, length: 5.95-8.05 mm, width: 3.20-4.80 mm, height: 1.70-2.30 mm mm, the specific gravity is 1.3g / cm 3 . This PET was placed in a rotary vacuum device (rotary vacuum dryer) with a high polymerization temperature of 190 to 230° C. and a vacuum degree of 0.5 mmHg, and heated while s...
Embodiment 5～7
[0169] Extrude the same PET polymer (number-average molecular weight 21000, intrinsic viscosity 0.71, titanium dioxide particle concentration 14% by weight) with A layer and B layer similarly with the method of embodiment 1~4, be single-layer structure substantially (B layer / A layer / B layer=B layer / B layer / B layer). The addition amount of titanium oxide in single-layer PET was 5% by weight as Sheet-7 (Example 5), 14% by weight as Sheet-8 (Example 6), and 40% by weight as Tablet-7 (Example 5). Sheet-9 (Example 7), three kinds of composite films were produced, and silicon oxide sputtered films were laminated on one side of each sheet in the same manner as in Examples 1 to 4, and these laminated products were respectively referred to as laminated products-7 to Laminates - 9. About other parts, it is the same as that of Examples 1-4.
Embodiment 8～10
[0175]The number average molecular weight of the PET in the B layer is 21000, and the intrinsic viscosity is 0.71, and the number average molecular weight of the PET in the A layer is 18300, and the intrinsic viscosity is 0.55 (both PETs have a titanium dioxide particle concentration of 14% by weight). ). These polymers are laminated by a lamination device so as to form B layer / A layer / B layer, and are molded into a sheet form by a T-die. The lamination structure is a composite 3-layer structure. The unstretched sheet formed by cooling and solidifying the sheet-shaped molded product extruded from the T die on a cooling drum with a surface temperature of 25°C is introduced into a roller set heated to 85-98°C, and stretched 3.3 times in the longitudinal direction. 21 ~ 25 ° C roller group cooling. Next, the both ends of the longitudinally stretched film were held by clips, introduced into a tenter, and laterally stretched 3.6 times in a direction perpendicular to the longitudi...
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Abstract
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