JP2020191461A5

JP2020191461A5 -

Info

Publication number: JP2020191461A5
Application number: JP2020125858A
Authority: JP
Filing date: 2020-07-22
Publication date: 2021-04-01
Anticipated expiration: 2038-03-30

Description

［評価例３：高温での耐光性］
上記評価例１で用いた透明性を評価する封止材シート評価用試料を、高温での耐光性を評価する資料としても用いた。これらの各試料について、東洋精機製作所アトラス・ウエザオメータＣｉ４０００を用い、放射照度１８０Ｗ／ｍ^２、ブラックパネル温度（ＢＰＴ）１１０℃、湿度５０％の条件で１０００時間の照射試験を行った。その後に、下記の引張り応力試験を行い、各封止材シートの高温での耐光性について評価した。
（引張り応力試験方法）
：封止材シートを５０ｍｍ長さ、１０ｍｍ幅にカットしたものを、剥離試験機（テンシロン万能試験機ＲＴＦ−１１５０−Ｈ）の上下１０ｍｍを治具で押さえ、チャック間距離３０ｍｍ、引張り速度５０ｍｍ／ｍｉｎの引張り試験を行い、封止材シートの引張り応力を測定した。評価基準は以下の通りとした。評価結果は表１「耐光性」の覧に記した。 [Evaluation example 3: Light resistance at high temperature]
The encapsulant sheet evaluation sample used in Evaluation Example 1 for evaluating transparency was also used as a material for evaluating light resistance at high temperatures. Each of these samples was subjected to an irradiation test for 1000 hours using the Atlas Weatherometer Ci4000 manufactured by Toyo Seiki Seisakusho under the conditions of irradiance of 180 W / m ² , black panel temperature (BPT) of 110 ° C., and humidity of 50% . After that, the following tensile stress test was performed to evaluate the light resistance of each encapsulant sheet at high temperature.
(Tensile stress test method)
: A sheet of sealing material cut to a length of 50 mm and a width of 10 mm is pressed by a jig 10 mm above and below the peeling tester (Tencilon universal tester RTF-1150-H), and the distance between chucks is 30 mm and the tensile speed is 50 mm / A tensile test of min was performed, and the tensile stress of the encapsulant sheet was measured. The evaluation criteria are as follows. The evaluation results are shown in Table 1 “Light resistance”.

Claims

A sealing material sheet for solar cell modules
Using polyethylene resin as the base resin
A high molecular weight type hindered amine light-resistant stabilizer with a molecular weight of 1000 or more,
Contains a low molecular weight type hindered amine light-resistant stabilizer with a molecular weight of less than 1000,
The absolute value of the difference in SP value between the base resin and the high molecular weight type hindered amine light-resistant stabilizer is 1.0 (cal / cm ³ ) ^1/2 or more and 1.6 (cal / cm ³ ) ^{1 /. 2} or less
The absolute value of the difference in SP value between the base resin and the low molecular weight type hindered amine light-resistant stabilizer is 0.5 (cal / cm ³ ) ^1/2 or more and 2.0 (cal / cm ³ ) ^{1 /. 2} or less,
Encapsulant sheet.

The SP value of the high molecular weight type hindered amine light-resistant stabilizer is 9.5 (cal / cm). ^３3 ) ^１／２1/2 More than 10.2 (cal / cm) ^３3 ) ^１／２1/2 Is below
The SP value of the low molecular weight type hindered amine light-resistant stabilizer is 8.6 (cal / cm). ^３3 ) ^１／２1/2 Above 10.6 (cal / cm) ^３3 ) ^１／２1/2 Is below
The encapsulant sheet according to claim 1.

The encapsulant sheet according to claim 1 or 2, wherein the haze value measured by the following transparency evaluation test is less than 8.0%.
Transparency evaluation test: The encapsulant sheet is sandwiched between ETFE films, (a) evacuation: 6 minutes, (b) pressurization: (0 kPa to 50 kPa): 10 seconds, (c) pressure retention: (50 kPa). : 11 minutes, (d) After vacuum heating and laminating under the condition of temperature: 165 ° C., ETFE is peeled off and the haze value is measured.

The encapsulant sheet according to any one of claims 1 to 3, wherein the glass adhesion strength measured by the following glass adhesion light resistance evaluation test is 20 N / 15 mm or more.
Glass adhesion light resistance evaluation test: The encapsulant sheet is adhered to a glass substrate (white plate semi-tempered glass (JPT 3.2 75 mm × 50 mm × 3.2 mm)), and (a) vacuuming: 6 minutes, (b). ) Pressurization: (0 kPa to 50 kPa): 10 seconds, (c) Pressure retention: (50 kPa): 11 minutes, (d) Vacuum heat laminating treatment under the conditions of (d) temperature: 165 ° C. Irradiance 180 W / m ^２2 After irradiation for 1333 hours under the conditions of black panel temperature (BPT) 65 ° C. and humidity 50%, the glass adhesion strength was measured by a vertical peeling (50 mm / min) test using a peeling tester, and the glass adhesion strength was measured three times. The average value of is taken as the glass adhesion strength (N / 15 mm).

The encapsulant sheet according to any one of claims 1 to 4, wherein the tensile stress measured by the light resistance evaluation test at a high temperature described below is 3.0 MPa or more.
Light resistance evaluation test at high temperature: The encapsulant sheet is sandwiched between ETFE films, (a) evacuation: 6 minutes, (b) pressurization: (0 kPa to 50 kPa): 10 seconds, (c) pressure retention: (50 kPa): 11 minutes, (d) After vacuum heating and laminating under the conditions of temperature: 165 ° C., ETFE is peeled off, irradiance 180 W / m ² , black panel temperature (BPT) 110 ° C., humidity 50%. After irradiation for 1000 hours, a tensile test with a chuck-to-chuck distance of 30 mm and a tensile speed of 50 mm / min is performed to measure the tensile stress.

The high molecular weight type hindered amine light-resistant stabilizer is N-CH. _３3 A type of hindered amine light-resistant stabilizer
The encapsulant sheet according to any one of claims 1 to 5, wherein the low molecular weight type hindered amine-based light-resistant stabilizer is an N-OR type hindered amine-based light-resistant stabilizer.

The encapsulant sheet according to any one of claims 1 to 6, further comprising a cross-linking agent.

The encapsulant sheet according to any one of claims 1 to 7, further comprising a silane-modified polyethylene resin.

It is composed of a glass protective substrate, a light receiving surface side sealing material that is in close contact with the glass protective substrate, and a solar cell element.
A solar cell module in which the light receiving surface side sealing material is the sealing material sheet according to any one of claims 1 to 8.