JP7204659B2 - 積層物および補強シート - Google Patents
積層物および補強シート Download PDFInfo
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- JP7204659B2 JP7204659B2 JP2019550365A JP2019550365A JP7204659B2 JP 7204659 B2 JP7204659 B2 JP 7204659B2 JP 2019550365 A JP2019550365 A JP 2019550365A JP 2019550365 A JP2019550365 A JP 2019550365A JP 7204659 B2 JP7204659 B2 JP 7204659B2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2305/00—Condition, form or state of the layers or laminate
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- B32B2305/076—Prepregs
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/546—Flexural strength; Flexion stiffness
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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Description
接着剤層と拘束層を有する積層物であって、
該拘束層が、強化繊維糸条を平行に配列した強化繊維シート形状物を多層に積層してステッチ糸で編み込むことで一体化した多層基材に熱硬化性樹脂組成物を含浸させた含浸層を含む。
拘束層は、強化繊維糸条を平行に配列した強化繊維シート形状物を多層に積層してステッチ糸で編み込むことで一体化した多層基材に熱硬化性樹脂組成物を含浸させた含浸層を含む。
接着剤層は、好ましくは、エポキシ系樹脂を含む。
実施例・比較例で得られた積層物の離型紙を剥がし、25mm幅×150mm長さ×0.8mm厚さの油面冷間圧縮鋼板(SPCC-SD、日本テストパネル社製)に、20℃で貼着し、170℃、0.1MPaで、30分加熱プレスして、試験片を作製した。
鋼板が上向きとなる状態で試験片をスパン100mmで支持し、その長手方向中央において、テスト用バーを垂直方向上方から圧縮速度5mm/分にて降下させたときの最大曲げ強度、最大曲げ強度時の変位を測定した。
表1に示す配合処方において、各成分を配合し、ミキシングロールで混練することにより混練物(接着剤組成物)を調製した。なお、この混練においては、まず、エポキシ樹脂、ゴム変性エポキシ樹脂、充填剤、靭性付与剤を、120℃に加熱したミキシングロールで混練した後、この混練物を、60℃~100℃に冷却し、さらに、潜在性硬化剤を加えて、ミキシングロールで混練して、混練物を得た。
次いで、得られた混練物を、剥離紙に挟んだ状態でプレス成形により、厚み0.2mmに圧延して接着剤層を形成した。
その後、接着剤層の一方面の剥離紙を剥がし、厚み250μmの不織布基材(質量38g/m2)の両面に、接着剤層をヒートプレス(50℃)にて貼着し、接着剤層および基材の合計の厚みを0.5mmとすることにより、両面接着テープ(1)を作製した。
(拘束層の準備)
フェノールノボラック型エポキシ樹脂(EP154、三菱化学社製):60質量部、ビスフェノールA型エポキシ樹脂(グレード1001、三菱化学社製):40質量部、硬化剤(ジシアンアミド、オミキュア5、CVCスペシャリティケミカルズ製):5質量部、硬化促進剤(4,4’-メチレンビス(フェニルジメチルウレア)、オミキュア52、CVCスペシャリティケミカルズ製):2質量部を、メチルエチルケトンに分散溶解させて、含浸溶液(1)を調製した。
別途、強化繊維として、東レ社製の「TORAYCA」(登録商標)(T700SC-12000、強化繊維密度1.8g/cm3)を用い、+45/-45度方向に1層が100g/m2となるように所定の本数を配し、これをポリエステル糸を用いてチェーンステッチにて縫合し、200g/m2の炭素繊維基材(1)を作製した。
含浸溶液(1)に炭素繊維基材(1)を含浸させ、乾燥機で溶剤を揮発させ、樹脂成分の含有量が35質量%のプリプレグ(1)を作製した。
得られたプリプレグ(1)を5層積層し、80℃、0.2MPaにて30秒間プレスし、拘束層(1)を得た。
(積層物の作製)
製造例1で得られた両面接着テープ(1)の剥離紙を剥がし、拘束層(1)に貼りあわせ、積層物(1)を得た。
拘束層(1)の厚みは1200μmであり、接着剤層の厚みは500μmであり、積層物(1)の厚みは1700μmであった。曲げ強度評価は+45度方向を150mm長さ方向にとって強度評価を実施した。
結果を表2に示した。
(拘束層の準備)
含浸溶液として、実施例1と同じ含浸溶液(1)を調製した。
別途、強化繊維として、Eガラス繊維(引張強度3500MPa、引張弾性率74GPa、強化繊維密度2.6g/cm3、単繊維経12μm)を用い、+45/-45度方向に1層が220g/m2となるように所定の本数を配し、これをポリエステル糸を用いてチェーンステッチにて縫合し、440g/m2のガラス繊維基材(2)を作製した。
含浸溶液(1)にガラス繊維基材(2)を含浸させ、乾燥機で溶剤を揮発させ、樹脂成分の含有量が35質量%のプリプレグ(2)を作製した。
得られたプリプレグ(2)を2層積層し、80℃、0.2MPaにて30秒間プレスし、拘束層(2)を得た。
(積層物の作製)
製造例1で得られた両面接着テープ(1)の剥離紙を剥がし、拘束層(2)に貼りあわせ、積層物(2)を得た。
拘束層(2)の厚みは1200μmであり、接着剤層の厚みは500μmであり、積層物(2)の厚みは1700μmであった。曲げ強度評価は0度方向を150mm長さ方向にとって強度評価を実施した。
結果を表2に示した。
(拘束層の準備)
含浸溶液として、実施例1と同じ含浸溶液(1)を調製した。
別途、強化繊維として、東レ社製の「TORAYCA」(登録商標)(T700SC-12000、強化繊維密度1.8g/cm3)を用い、+45/-45度方向に、+45度層が400g/m2、-45度層が100g/m2となるように所定の本数を配し、これをポリエステル糸を用いてチェーンステッチにて縫合し、500g/m2の炭素繊維基材(3a)を作製した。また同様に、-45/+45度方向に-45度層が400g/m2、+45度層が100g/m2となるように所定の本数を配し、これをポリエステル糸を用いてチェーンステッチにて縫合し、500g/m2の炭素繊維基材(3b)を作製した。
含浸溶液(1)に炭素繊維基材(3a)および(3b)を含浸させ、乾燥機で溶剤を揮発させ、樹脂成分の含有量が35質量%のプリプレグ(3a)および(3b)を作製した。
得られたプリプレグ(3a)および(3b)のそれぞれの100g/m2層を内側に合わせて2層積層し、80℃、0.2MPaにて30秒間プレスし、拘束層(3)を得た。
(積層物の作製)
製造例1で得られた両面接着テープ(1)の剥離紙を剥がし、拘束層(3)に貼りあわせ、積層物(3)を得た。
拘束層(3)の厚みは1200μmであり、接着剤層の厚みは500μmであり、積層物(3)の厚みは1700μmであった。曲げ強度評価は400g/m2層の繊維方向を150mm長さ方向にとり強度評価を実施した。
結果を表2に示した。
(拘束層の準備)
含浸溶液として、実施例1と同じ含浸溶液(1)を調製した。
別途、強化繊維として、東レ社製の「TORAYCA」(登録商標)(T700SC-12000、強化繊維密度1.8g/cm3)を用い、0/+90度方向に1層が250g/m2となるように所定の本数を配し、これをポリエステル糸を用いてチェーンステッチにて縫合し、500g/m2の炭素繊維基材(4)を作製した。
含浸溶液(1)に炭素繊維基材(4)を含浸させ、乾燥機で溶剤を揮発させ、樹脂成分の含有量が35質量%のプリプレグ(4)を作製した。
得られたプリプレグ(4)を2層積層し、80℃、0.2MPaにて30秒間プレスし、拘束層(4)を得た。
(積層物の作製)
製造例1で得られた両面接着テープ(1)の剥離紙を剥がし、拘束層(4)に貼りあわせ、積層物(4)を得た。
拘束層(4)の厚みは1200μmであり、接着剤層の厚みは500μmであり、積層物(4)の厚みは1700μmであった。曲げ強度評価は0度方向を150mm長さ方向にとって強度評価を実施した。
結果を表2に示した。
(拘束層の準備)
含浸溶液として、実施例1と同じ含浸溶液(1)を調製した。
別途、強化繊維として、東レ社製の「TORAYCA」(登録商標)(T700SC-12000、強化繊維密度1.8g/cm3)を用い、+45/+90度方向に+45度層が400g/m2、+90度層が100g/m2となるように所定の本数を配し、これをポリエステル糸を用いてチェーンステッチにて縫合し、500g/m2の炭素繊維基材(5a)を作製した。また同様に、-45/+90度方向に-45度層が400g/m2、+90度層が100g/m2となるように所定の本数を配し、これをポリエステル糸を用いてチェーンステッチにて縫合し、500g/m2の炭素繊維基材(5b)を作製した。
含浸溶液(1)に炭素繊維基材(5a)および(5b)を含浸させ、乾燥機で溶剤を揮発させ、樹脂成分の含有量が35質量%のプリプレグ(5a)および(5b)を作製した。
得られたプリプレグ(5a)および(5b)のそれぞれの100g/m2層を内側に合わせて2層積層し、80℃、0.2MPaにて30秒間プレスし、拘束層(5)を得た。
(積層物の作製)
製造例1で得られた両面接着テープ(1)の剥離紙を剥がし、拘束層(5)に貼りあわせ、積層物(5)を得た。
拘束層(5)の厚みは1200μmであり、接着剤層の厚みは500μmであり、積層物(5)の厚みは1700μmであった。曲げ強度評価は+45度方向を150mm長さ方向にとり強度評価を実施した。
結果を表2に示した。
ビスフェノールA型エポキシ樹脂(商品名「エピコート#828」、エポキシ当量=180g/eq、ジャパンエポキシレジン株式会社製):100質量部、アクリロニトリル・ブタジエンゴム(商品名「NBR1042」、日本ゼオン株式会社製):30質量部、タルク:100質量部、炭酸カルシウム:100質量部、カーボンブラック(商品名「旭#50」、旭カーボン株式会社製)、スチレンブタジエンゴム(商品名「タフデン2003」、旭化成株式会社製):50質量部を、120℃に加熱したミキシングロールで混練した後、この混練物を50℃~80℃に冷却し、さらに、硬化剤(ジシアンアミド、オミキュア5、CVCスペシャリティケミカルズ製):5質量部、硬化促進剤(DCMU、3-(3,4-ジクロロフェニル)-1,1-ジメチルウレア、保土ヶ谷化学社製):5質量部、加硫剤(微粉硫黄):30質量部、加硫助剤(酸化亜鉛):5質量部、加硫助剤(2-メルカプトベンゾチアゾール):10質量部、発泡剤(4,4’-オキシビス(ベンゼンスルホニルヒドラジド):3質量部を加えて、ミキシングロールで混練し、樹脂組成物を調製した。
次いで、この樹脂組成物を、プレス成型機によって厚さ1.0mmに圧延して樹脂層を形成した。その後、この樹脂層に、補強層として、厚さ0.2mmの樹脂含浸ガラスクロスを貼り合わせ、樹脂層における補強層が貼り合わされた反対側の表面に、離型紙を貼着することにより、積層物(C1)を得た。
積層物(C1)の厚みは1200μmであった。
結果を表2に示した。
Claims (12)
- 接着剤層と拘束層を有する積層物であって、
該接着剤層に該拘束層が貼り合わせられてなり、
該接着剤層がゴム変性エポキシ樹脂を含み、
該拘束層が、強化繊維糸条を平行に配列した強化繊維シート形状物を多層に積層してステッチ糸で編み込むことで一体化した多層基材に熱硬化性樹脂組成物を含浸させたプリプレグを含む、
積層物。 - 前記強化繊維糸条が、炭素繊維糸条、ガラス繊維糸条、樹脂繊維糸条から選ばれる少なくとも1種である、請求項1に記載の積層物。
- 前記多層基材に含まれる多層の強化繊維シート形状物が、強化繊維シート形状物の層(1)と、該強化繊維シート形状物の層(1)が有する強化繊維糸条の長さ方向に対して、強化繊維糸条の長さ方向が30度以上異なる強化繊維シート形状物の層(2)を有し、該強化繊維シート形状物の層(1)の質量は、該強化繊維シート形状物の層(2)の質量と同等以上である、請求項1または2に記載の積層物。
- 前記強化繊維シート形状物の層(2)の強化繊維糸条の長さ方向の、前記強化繊維シート形状物の層(1)が有する強化繊維糸条の長さ方向に対する角度が、30度~150度である、請求項3に記載の積層物。
- 前記強化繊維シート形状物の層(1)と前記強化繊維シート形状物の層(2)の質量比が9:1~5:5である、請求項3または4に記載の積層物。
- 前記接着剤層が尿素系化合物を含む、請求項1から5までのいずれかに記載の積層物。
- 前記熱硬化性樹脂組成物がエポキシ系樹脂を含む、請求項1から6までのいずれかに記載の積層物。
- 前記エポキシ系樹脂が、ビスフェノールA型エポキシ樹脂とノボラック型エポキシ樹脂との組み合わせである、請求項7に記載の積層物。
- 前記ビスフェノールA型エポキシ樹脂と前記ノボラック型エポキシ樹脂の含有比率が、質量比で、90:10~10:90である、請求項8に記載の積層物。
- 前記接着剤層の厚みが0.4mm~3mmである、請求項1から9までのいずれかに記載の積層物。
- 前記拘束層の厚みが0.05mm~2mmである、請求項1から10までのいずれかに記載の積層物。
- 請求項1から11までのいずれかに記載の積層物を含む、補強シート。
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- 2018-10-29 JP JP2019550365A patent/JP7204659B2/ja active Active
- 2018-10-29 CN CN201880070803.0A patent/CN111278641B/zh active Active
- 2018-10-29 EP EP18871989.2A patent/EP3705289A4/en active Pending
- 2018-10-29 WO PCT/JP2018/040057 patent/WO2019088009A1/ja unknown
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US20200346430A1 (en) | 2020-11-05 |
JPWO2019088009A1 (ja) | 2020-11-26 |
EP3705289A4 (en) | 2021-08-25 |
CN111278641B (zh) | 2023-10-03 |
EP3705289A1 (en) | 2020-09-09 |
US11453199B2 (en) | 2022-09-27 |
WO2019088009A1 (ja) | 2019-05-09 |
CN111278641A (zh) | 2020-06-12 |
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