JP7699397B2 - 電池パック用長時間持続型調湿材及びその製造方法 - Google Patents
電池パック用長時間持続型調湿材及びその製造方法 Download PDFInfo
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- JP7699397B2 JP7699397B2 JP2023558407A JP2023558407A JP7699397B2 JP 7699397 B2 JP7699397 B2 JP 7699397B2 JP 2023558407 A JP2023558407 A JP 2023558407A JP 2023558407 A JP2023558407 A JP 2023558407A JP 7699397 B2 JP7699397 B2 JP 7699397B2
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Description
本願は、2022年07月18日に中国に提出された、中国特許出願番号202210839791.1の優先権を主張し、その内容全体が参照により本願に組み込まれる。
1、本発明により製造された調湿材は、その中の変性高吸水性ポリマーが空間網状構造を有すると共に、親水性基を大量に有するため、高吸水性ポリマーは気孔率に優れ、長期間にわたる水分吸収能力を有する。
2、本発明は、カリウム塩、塩化物塩を溶媒に溶解させて溶液を形成した後、溶媒和したイオンが一部の面積を占めて、一部の水分子を閉じ込めることができ、それらの蒸発と吸収が阻害され、調湿材の調湿効能を向上させる。
上部封止層、調湿層及び下部封止層を含む電池パック用長時間持続型調湿材であって、上部封止層は防水通気性膜層であり、具体的には疎水性膨潤体ポリテトラフルオロエチレンフィルムであり、調湿層は3層の調湿シートからなり、具体的には基材及び変性調湿高分子コーティング層からなり、基材はポリエステルである。
ステップ2:基材を上記混合物に浸漬塗布して5s後に取り出し、75℃の温度で15min乾燥させ、調湿シートを製造した。
ステップ3:ダイカットによって調湿シートを一定のサイズのシート材に加工した。
ステップ4:上部封止層、調湿シート及び下部封止層を順に重ね合わせ、熱間圧接プロセスを用いて上部封止層及び下部封止層を積層し、電池パック用長時間持続型調湿材を製造した。
S1:窒素雰囲気下でガラス製反応容器に100kgの溶媒を加え、次に17kgのアクリルアミド、1kgのメトキシポリエチレングリコールマレイミド、2kgの触媒を加え、さらに30kgの化合物Aを加え、温度40℃の条件で20h撹拌し、反応系を室温に冷却した。
ステップ1:15kgのカリウム塩、5kgの塩化物塩を30kgのエチレングリコールに溶解し、次に3kgの変性高吸水性ポリマーを上記溶液に浸漬して4 h膨潤させ、塩でポリマー表面を均一に被覆した。
図1に示す試験待ち容器(直径0.12m、長さ1.2m)を用いて、先端、中央、末端(0.6m間隔で1点)に温湿度計を入れて湿度をモニターし、サイズが95mm×135mm×3.5mmの、実施例1~6で製造された調湿材を容器の先端又は末端に置き、温度が45℃、湿度が95%の恒温恒湿環境で10h置いた後、上記3つの検出点の湿度値を記録し、3つの検出点の最小値を基準として、3つの検出点の吸湿精度を計算した。さらに、試験待ち容器を、温度が45℃、湿度が25%の恒温恒湿環境で10h置いた後、上記3つの検出点の湿度値を記録し、3つの検出点の最小値を基準として、3つの検出点の放湿精度を計算した。
サイズが95mm×135mm×3.5mmの、実施例1~6で製造された調湿材を温度が45℃、湿度が95%の恒温恒湿環境で、1h毎に取り出して秤量し、調湿材の吸湿率を計算し、その計算式は吸湿率=(吸湿重量-元の重量)/元の重量である。最終調湿材の飽和吸湿率、即ち、当該環境条件で調湿材の重量がそれ以上増加しない場合の吸湿率を記録した。
サイズが95mm×135mm×3.5mmの、実施例1~6で製造された調湿材を秤量してm1とし、温度が35℃、湿度が85%の恒温恒湿環境で24h置き、次に温度が35℃、湿度が30%の恒温恒湿環境で24h置いた後に秤量してm2とし、計算によってM1=│m2-m1│を得て、それを1つの検出サイクルとした。10の試験サイクルを経て、それぞれM1、M2……M10を計算して得た。
M1、M2……M10の何れか1つのM値≦2gの場合、「OK」と判定される
M1、M2……M10の何れか1つのM値>2gの場合、「NG」と判定される。試験結果は表1に示される。
Claims (6)
- 電池パック用長時間持続型調湿材の製造方法であって、
前記電池パック用長時間持続型調湿材は、上部封止層、調湿層及び下部封止層を含み、
前記上部封止層は防水通気性膜層であり、前記防水通気性膜層は疎水性膨潤体ポリテトラフルオロエチレンフィルムであり、
前記調湿層は1~5層の調湿シートからなり、前記調湿シートは基材及び変性調湿高分子コーティング層からなり、前記基材はポリエステルであり、
前記変性調湿高分子コーティング層は、3~10重量部の変性高吸水性ポリマー、15~25重量部のカリウム塩、5~10重量部の塩化物塩及び30~50重量部の第一の溶媒という原料により製造されるものであり、
前記変性高吸水性ポリマーの製造工程は、
重量部に従って、窒素雰囲気下でガラス又はポリテトラフルオロエチレン製反応容器に100~200部の第二の溶媒を加え、次に17~25部のアクリルアミド、1~5部のメトキシポリエチレングリコールマレイミド、2~5部の触媒を加え、さらに30~45部の化合物Aを加え、温度40~60℃の条件で20~40h撹拌し、反応系を室温に冷却するステップS1と、
5~10部の1,3-(ジビニルスルホニル)プロパノール、0.05~0.5部のビ ニルフェロセン、1~3部の過酸化ベンゾイルを加え、温度60~70℃の条件で3~8h撹拌し、減圧下でろ過し、水、メタノールで洗浄し、固体生成物を30~80℃の条件で6~12h真空乾燥させ、変性高吸水性ポリマーを得るステップS2と、を含み、
前記化合物Aは、エチレングリコールジ(3-メルカプトプロピオネート)(GDMP)、ペンタエリスリトールテトラ(3-メルカプトプロピオネート)(PETMP)、ペンタエリスリトールテトラメルカプトアセテート(PETMA)、ジペンタエリスリトー ルテトラ(3-メルカプトプロピオネート)、ジペンタエリスリトールテトラメルカプトアセテート、ジペンタエリスリトールペンタ(3-メルカプトプロピオネート)、ジペンタエリスリトールペンタメルカプトアセテート、ジペンタエリスリトールヘキサ(3-メルカプトプロピオネート)から選ばれるものである、
ことを特徴とする、前記電池パック用長時間持続型調湿材の製造方法。 - 重量部に従って、15~25重量部のカリウム塩、5~10重量部の塩化物塩を30~50重量部の第一の溶媒に溶解し、次に3~10部の変性高吸水性ポリマーをその中に浸漬して4~8h膨潤させ、塩でポリマー表面を均一に被覆するステップ1と、
基材をステップ1の混合物に浸漬塗布して5~20s後に取り出し、75~95℃の温度で5~15min乾燥させ、調湿シートを製造するステップ2と、
ダイカットによって調湿シートを一定のサイズのシート材に加工するステップ3と、
上部封止層、調湿シート及び下部封止層を順に重ね合わせ、熱間圧接プロセスを用いて上部封止層及び下部封止層を積層し、電池パック用長時間持続型調湿材を製造するステップ4と、を含む、
ことを特徴とする請求項1に記載の電池パック用長時間持続型調湿材の製造方法。 - 前記カリウム塩は炭酸カリウム、臭化カリウムから選ばれる1種又は2種であり、前記塩化物塩は塩化ナトリウム、塩化マグネシウム、塩化カルシウムから選ばれる1種又は2種以上であり、前記第一の溶媒は脱イオン水、エチレングリコールから選ばれる1種又は2種である、
ことを特徴とする、請求項1または2に記載の電池パック用長時間持続型調湿材の製造方法。 - 前記下部封止層はPET、COP、PES又はPIから選ばれる、
ことを特徴とする、請求項1または2に記載の電池パック用長時間持続型調湿材の製造方法。 - 前記第二の溶媒はエタノール、ジメチルスルホキシド、テトラヒドロフラン、アセトン又はN,N-ジメチルホルムアミドのうちの1種又は2種以上である、
ことを特徴とする、請求項1または2に記載の電池パック用長時間持続型調湿材の製造方法。 - 前記触媒はトリフェニルホスフィン(PPh3)、トリエチルアミン又はジプロピルアミンのうちの1種又は2種以上である、
ことを特徴とする、請求項1または2に記載の電池パック用長時間持続型調湿材の製造方法。
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