JP6880467B2 - フッ素系樹脂多孔性膜、その製造方法及び自動車用ベントフィルター - Google Patents
フッ素系樹脂多孔性膜、その製造方法及び自動車用ベントフィルター Download PDFInfo
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- JP6880467B2 JP6880467B2 JP2019568367A JP2019568367A JP6880467B2 JP 6880467 B2 JP6880467 B2 JP 6880467B2 JP 2019568367 A JP2019568367 A JP 2019568367A JP 2019568367 A JP2019568367 A JP 2019568367A JP 6880467 B2 JP6880467 B2 JP 6880467B2
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- fluorine
- porous
- porous membrane
- fluororesin
- bending
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2433/14—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
- C08J2433/16—Homopolymers or copolymers of esters containing halogen atoms
Description
本出願は、2017年11月24日付韓国特許出願第10−2017−0158928号および2018年11月22日付韓国特許出願第10−2018−0145625号に基づいた優先権の利益を主張し、該当韓国特許出願の文献に開示された全ての内容は本明細書の一部として含まれる。
[式1]
ベンディング前後通気度変化率(%)=[(Pa−Pb)/Pa]×100
式1中、
Paは、ベンディングを付与する前に測定されたフッ素系多孔性膜の通気度値であり、
Pbは、フッ素系多孔性膜に対して"0.5kgf(4.9N)の張力が加えられた状態で4mm〜12mmの直径(R)を有するステンレススチール材質の円筒に巻いて30秒間維持した後、前記張力を除去した後に再度フッ素系多孔性膜を広げる条件"でベンディングを付与した後に測定されたフッ素系多孔性膜の通気度値であり、
前記通気度値は、JIS P 8117の標準によってガーレー(Gurley)方式で測定される。
前記1軸延伸された多孔性フッ素系樹脂層を熱固定する段階;
前記熱固定された多孔性フッ素系樹脂層を少なくとも150℃以上で自由収縮する段階;および
固形分含量2〜10重量%に希釈された撥水撥油剤含有溶液に、前記自由収縮された多孔性フッ素系樹脂層を含浸し乾燥する段階;を含み、
前記撥水撥油剤は、炭素数1〜10のペルフルオロアルキルアクリレート−炭素数1〜10のアルキルアクリレート−塩化ビニル−架橋性単量体の(共)重合体を含む、前記フッ素系樹脂多孔性膜の製造方法を提供する。
2mm以上の曲率半径範囲内で、屈曲が付与されるベンディング前後の下記式1で表される通気度変化率が1%以下であるフッ素系樹脂多孔性膜が提供され得る:
[式1]
ベンディング前後通気度変化率(%)=[(Pa−Pb)/Pa]×100
式1中、
Paは、ベンディングを付与する前に測定されたフッ素系多孔性膜の通気度値であり、
Pbは、フッ素系多孔性膜に対して"0.5kgf(4.9N)の張力が加えられた状態で4mm〜12mmの直径(R)を有するステンレススチール材質の円筒に巻いて30秒間維持した後、前記張力を除去した後に再度フッ素系多孔性膜を広げる条件"でベンディングを付与した後に測定されたフッ素系多孔性膜の通気度値であり、
前記通気度値は、JIS P 8117の標準によってガーレー(Gurley)方式で測定される。
[式1]
ベンディング前後通気度変化率(%)=[(Pa−Pb)/Pa]×100
式1中、
Paは、ベンディングを付与する前に測定されたフッ素系多孔性膜の通気度値であり、
Pbは、フッ素系多孔性膜に対して"0.5kgf(4.9N)の張力が加えられた状態で4mm〜12mmの直径(R)を有するステンレススチール材質の円筒に巻いて30秒間維持した後、前記張力を除去した後に再度フッ素系多孔性膜を広げる条件"でベンディングを付与した後に測定されたフッ素系多孔性膜の通気度値であり、
前記通気度値は、JIS P 8117の標準によってガーレー(Gurley)方式で測定される。
[式2]
ベンディング収縮率(Bending Shringage)(%)=5×exp[−0.8×曲率半径(mm)]
前記パッチ型フッ素系樹脂多孔性膜の収縮率は、フッ素系多孔性膜に曲率半径2mm以上の屈曲を加えた後に測定されるTD方向に対するMD方向の比率であり得る。
[表1]
−実施例1:自由収縮工程を行ったフッ素系樹脂多孔性膜を曲率半径2mmにベンディング(bending)した後に得られたもの
−実施例2:自由収縮工程を行ったフッ素系樹脂多孔性膜を曲率半径4mmにベンディング(bending)した後に得られたもの
−実施例3:自由収縮工程を行ったフッ素系樹脂多孔性膜を曲率半径6mmにベンディング(bending)した後に得られたもの
−比較例1:自由収縮工程を行わなかったフッ素系樹脂多孔性膜を曲率半径2mmにベンディング(bending)した後に得られたもの
−比較例2:自由収縮工程を行わなかったフッ素系樹脂多孔性膜を曲率半径4mmにベンディング(bending)した後に得られたもの
−比較例3:自由収縮工程を行わなかったフッ素系樹脂多孔性膜を曲率半径6mmにベンディング(bending)した後に得られたもの
[式1]
ベンディング前後通気度変化率(%)=[(Pa−Pb)/Pa]×100
(式1中、
Paは、ベンディングを付与する前に測定されたフッ素系多孔性膜の通気度値であり、
Pbは、フッ素系多孔性膜にベンディングが付与された後に測定されたフッ素系多孔性膜の通気度値である)
[式2]
ベンディング収縮率(Bending Shringage)(%)=5×exp[−0.8×曲率半径(mm)]
Claims (16)
- 内部に気孔が形成された多孔性フッ素系樹脂層;および
前記多孔性フッ素系樹脂層の少なくとも一面と前記気孔の外面に形成され、炭素数1〜10のペルフルオロアルキルアクリレート−炭素数1〜10のアルキルアクリレート−塩化ビニル−架橋性単量体の(共)重合体を含む撥水および撥油性を有するコーティング層;
を含むフッ素系樹脂多孔性膜であり、
前記コーティング層は、自由収縮された前記多孔性フッ素系樹脂層の少なくとも一面と前記多孔性フッ素系樹脂層の内部に存在する全ての前記気孔の外面とに形成され、
前記多孔性フッ素系樹脂層の残留応力は、自由収縮されていない多孔性フッ素系樹脂層の残留応力よりも小さく、
前記フッ素系樹脂多孔性膜のいずれか一面および残りを成す他の一面の撥油度(AATCC−118)は、それぞれ6等級以上であり、
2mm以上の曲率半径範囲内で、屈曲が付与されるベンディング前後の下記式1で表される通気度変化率が1%以下である、
フッ素系樹脂多孔性膜:
[式1]
ベンディング前後通気度変化率(%)=[(Pa−Pb)/Pa]×100
式1中、
Paは、ベンディングを付与する前に測定されたフッ素系多孔性膜の通気度値であり、
Pbは、前記フッ素系多孔性膜に対して"0.5kgf(4.9N)の張力が加えられた状態で4mm〜12mmの直径(R)を有するステンレススチール材質の円筒に巻いて30秒間維持した後、前記張力を除去した後に再度前記フッ素系多孔性膜を広げる条件"でベンディングを付与した後に測定された前記フッ素系多孔性膜の通気度値であり、
前記通気度値は、JIS P 8117の標準によってガーレー(Gurley)方式で測定される。 - 前記フッ素系樹脂多孔性膜は、ベンディングによる全方向収縮率が下記式2によって1%以下になる、
請求項1に記載のフッ素系樹脂多孔性膜。
[式2]
ベンディング収縮率(Bending Shringage)(%)=5×exp[−0.8×曲率半径(mm)] - 前記フッ素系樹脂多孔性膜は、前記条件で前記ベンディングが付与された時、曲率半径が2mm〜6mmである範囲内で縦方向(MD)および横方向(TD)の全方向収縮率が0%〜1%である、
請求項2に記載のフッ素系樹脂多孔性膜。 - 前記ベンディングによる全方向収縮率は、前記フッ素系多孔性膜に曲率半径2mm以上の屈曲を加えた後に測定される横方向(TD)に対する縦方向(MD)の比率である、
請求項2または3に記載のフッ素系樹脂多孔性膜。 - 前記架橋性単量体は、ヒドロキシ基、カルボキシル基、エポキシ基、イソシアネート基またはウレタン、アミン、アミド、ユリアなどの窒素含有官能基を有する単量体である、
請求項1から4のいずれか一項に記載のフッ素系樹脂多孔性膜。 - 前記フッ素系樹脂多孔性膜のいずれか一面および残りを成す他の一面の撥油度(AATCC−118)は、対称性を有する、
請求項1から5のいずれか一項に記載のフッ素系樹脂多孔性膜。 - 気孔度40〜90%、最大気孔大きさ300nm〜4000nmおよび0.10〜1.30g/cm3の密度を有する、
請求項1から6のいずれか一項に記載のフッ素系樹脂多孔性膜。 - 前記多孔性フッ素系樹脂層は、ポリテトラフルオロエチレン(PTFE)、テトラフルオロエチレン−ペルフルオロアルキルビニルエーテル共重合体(PFA)、テトラフルオロエチレン−ヘキサフルオロプロピレン共重合体(FEP)、エチレン−テトラフルオロエチレンコポリマー樹脂(ETFE)、テトラフルオロエチレン−クロロトリフルオロエチレン共重合体(TFE/CTFE)およびエチレン−クロロトリフルオロエチレン樹脂(ECTFE)からなる群より選択された1種以上のフッ素系化合物を含む、
請求項1から7のいずれか一項に記載のフッ素系樹脂多孔性膜。 - 内部に気孔が形成された多孔性フッ素系樹脂層;および
前記多孔性フッ素系樹脂層の少なくとも一面と前記気孔の外面に形成され、炭素数1〜10のペルフルオロアルキルアクリレート−炭素数1〜10のアルキルアクリレート−塩化ビニル−架橋性単量体の(共)重合体を含む撥水および撥油性を有するコーティング層;
を含むフッ素系樹脂多孔性膜であり、
前記コーティング層は、自由収縮された前記多孔性フッ素系樹脂層の内部及び外部面に全体的に形成され、
前記多孔性フッ素系樹脂層の残留応力は、自由収縮されていない多孔性フッ素系樹脂層の残留応力よりも小さく、
前記フッ素系樹脂多孔性膜のいずれか一面および残りを成す他の一面の撥油度(AATCC−118)は、それぞれ6等級以上であり、
2mm以上の曲率半径範囲内で、屈曲が付与されるベンディング前後の下記式1で表される通気度変化率が1%以下である、
フッ素系樹脂多孔性膜:
[式1]
ベンディング前後通気度変化率(%)=[(Pa−Pb)/Pa]×100
式1中、
Paは、ベンディングを付与する前に測定されたフッ素系多孔性膜の通気度値であり、
Pbは、前記フッ素系多孔性膜に対して"0.5kgf(4.9N)の張力が加えられた状態で4mm〜12mmの直径(R)を有するステンレススチール材質の円筒に巻いて30秒間維持した後、前記張力を除去した後に再度前記フッ素系多孔性膜を広げる条件"でベンディングを付与した後に測定された前記フッ素系多孔性膜の通気度値であり、
前記通気度値は、JIS P 8117の標準によってガーレー(Gurley)方式で測定される。 - 1軸延伸された多孔性フッ素系樹脂層を製造する段階;
前記1軸延伸された多孔性フッ素系樹脂層を熱固定する段階;
前記熱固定された多孔性フッ素系樹脂層を少なくとも150℃以上で自由収縮する段階;および
固形分含量2〜10重量%に希釈された撥水撥油剤含有溶液に、前記自由収縮された多孔性フッ素系樹脂層を含浸し乾燥する段階;
を含み、
前記撥水撥油剤は、炭素数1〜10のペルフルオロアルキルアクリレート−炭素数1〜10のアルキルアクリレート−塩化ビニル−架橋性単量体の(共)重合体を含み、
前記(共)重合体は、撥油度(AATCC−118)が6等級以上である、
請求項1から9のいずれか一項に記載のフッ素系樹脂多孔性膜の製造方法。 - 前記自由収縮する段階は、前記熱固定された多孔性フッ素系樹脂層に対して150〜250℃で3分〜30分間行う段階を含む、
請求項10に記載のフッ素系樹脂多孔性膜の製造方法。 - 前記自由収縮する段階後に、常温で3〜30分間放置する段階をさらに含む、
請求項10または11に記載のフッ素系樹脂多孔性膜の製造方法。 - 前記熱固定する段階は、前記1軸延伸された多孔性フッ素系樹脂層をフッ素系樹脂の融点以上の温度条件で3〜30秒間行う、
請求項10から12のいずれか一項に記載のフッ素系樹脂多孔性膜の製造方法。 - 前記撥水撥油剤含有溶液は、水、炭素数4〜16のアルカン、アルコール、カルボン酸、ケトン、エーテルおよび炭素数5〜12のフッ素系アルカンからなる群より選択された1種以上の溶媒を含む、
請求項10から13のいずれか一項に記載のフッ素系樹脂多孔性膜の製造方法。 - 前記1軸延伸された多孔性フッ素系樹脂層は、
フッ素系樹脂および潤滑剤を含む組成物を用いて予備成形体を製造する段階;および
前記予備成形体を押出し、乾燥および縦方向(MD)に1軸延伸する段階;
を含む方法で提供される、
請求項10から14のいずれか一項に記載のフッ素系樹脂多孔性膜の製造方法。 - 請求項1から9のいずれか一項に記載のフッ素系樹脂多孔性膜を含む、
自動車用ベントフィルター。
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US11344836B2 (en) | 2022-05-31 |
EP3626335A1 (en) | 2020-03-25 |
WO2019103537A1 (ko) | 2019-05-31 |
CN110753577A (zh) | 2020-02-04 |
JP2020524726A (ja) | 2020-08-20 |
KR102161292B1 (ko) | 2020-09-29 |
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